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Journal articles on the topic 'Silica (SiO2)'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Fairus, Sirin, H. Haryono, Mas H. Sugita, and Agus Sudrajat. "Proses pembuatan waterglass dari pasir silika dengan pelebur natrium hidroksida." Jurnal Teknik Kimia Indonesia 8, no. 2 (2018): 56. http://dx.doi.org/10.5614/jtki.2009.8.2.4.

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Waterglass from silica sand production process with buster sodium hydroxideWaterglass may be prepared by the fusion process of silica sand using alkali. Waterglass component, which mainly contains SiO2 and Na2O, have various applications depending on their composition. Waterglass is usually used in the soap and detergent, paper, textile, and ceramic industries, in the cleaning of metals, the manufacture of silica gel, and others. This research was done to study the effect of silica sand particle size and the quantity of NaOH as fluxing agent on the yield and SiO2 content of waterglass produced

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2

Desfitri, Erda Rahmilaila, Reni Desmiarti, Munas Martynis, and Suci Rahma Dhani. "Analisis dan Karakterisasi Potensi Pozzolan Sebagai Sumber Silika (SiO2) Untuk Meningkatkan Nilai Sumber Daya Lokal." Jurnal Rekayasa Hijau 6, no. 2 (2022): 96–105. http://dx.doi.org/10.26760/jrh.v6i2.96-105.

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ABSTRAKKabupaten Padang Pariaman memiliki sumber daya pozzolan yang belum termanfaatkan secara optimal. Pozzolan adalah bahan yang mengandung senyawa silika dan alumina. Untuk pemanfaatan yang optimal dilakukan analisis dan karakterisasi potensi pozzolan sebagai sumber silika. Silika bisa dimanfaatkan untuk bahan baku utama diberbagai industri, seperti industri gelas, keramik, katalis, pertanian dan untuk pengolahan limbah. Untuk mengetahui potensi pozzolan sebagai sumber silika dilakukan analisis kualitatif dan kuantitaif menggunakan XRD dan XRF. Berdasarkan hasil analisis pola difraksi sinar

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3

Liang, Yutao, Jinchuan Zhang, Yang Liu, et al. "Evidence for Biogenic Silica Occurrence in the Lower Silurian Longmaxi Shale in Southeastern Chongqing, China." Minerals 10, no. 11 (2020): 945. http://dx.doi.org/10.3390/min10110945.

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The gas shale in the Lower Silurian Longmaxi Formation contains a considerable amount of biogenic silica. Various originated silicas in shale, derived from different depositional environment, are commonly associated with different degrees of organic matter enrichment, resulting in different mechanical and physical properties of shale reservoirs. Thin section identification, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), total organic carbon (TOC) analysis, X-ray diffraction (XRD) analysis, and X-ray fluorescence (XRF) spectroscopy were used to investigate the Lower S

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4

Hahm, Eunil, Ahla Jo, Sang Hun Lee, Homan Kang, Xuan-Hung Pham, and Bong-Hyun Jun. "Silica Shell Thickness-Dependent Fluorescence Properties of SiO2@Ag@SiO2@QDs Nanocomposites." International Journal of Molecular Sciences 23, no. 17 (2022): 10041. http://dx.doi.org/10.3390/ijms231710041.

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Silica shell coatings, which constitute important technology for nanoparticle (NP) developments, are utilized in many applications. The silica shell’s thickness greatly affects distance-dependent optical properties, such as metal-enhanced fluorescence (MEF) and fluorescence quenching in plasmonic nanocomposites. However, the precise control of silica-shell thicknesses has been mainly conducted on single metal NPs, and rarely on complex nanocomposites. In this study, silica shell-coated Ag nanoparticle-assembled silica nanoparticles (SiO2@Ag@SiO2), with finely controlled silica shell thicknesse

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5

Vijayan, R., G. Suresh Kumar, N. Surumbarkuzhali, and Eswaramoorthy K Varadharaj. "(Digital Presentation) Sol – Gel Process of Activated Carbon Based Silica Nanostructure Using Rice Husk Template for Supercapacitor Applications." ECS Meeting Abstracts MA2022-01, no. 1 (2022): 13. http://dx.doi.org/10.1149/ma2022-01113mtgabs.

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Rice hulls have portrayed large potential in becoming a sustainable biomass source in producing silica, cellulose, and carbon materials, which garnered well-known interest in the middle of researchers. In recent years, silica-based supercapacitors have emerged as leading energy storage devices that can be mostly used in hybrid electric vehicles, memory devices, etc owing to their unique features like fast charge and discharge rate, long cycle life, high power density, high reliability, etc. The objective of the current study is to determine and compare the specific capacitance of pure silica (

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6

Fujino, Shigeru, and Hiroshi Ikeda. "Room Temperature Imprint Using Crack-Free Monolithic SiO2-PVA Nanocomposite for Fabricating Microhole Array on Silica Glass." Journal of Nanomaterials 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/584320.

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This paper aims to fabricate microhole arrays onto a silica glass via a room temperature imprint and subsequent sintering by using a monolithic SiO2-poly(vinyl alcohol) (PVA) nanocomposite as the silica glass precursor. The SiO2-PVA suspension was prepared from fumed silica particles and PVA, followed by drying to obtain tailored SiO2-PVA nanocomposites. The dependence of particle size of the fumed silica particles on pore size of the nanocomposite was examined. Nanocomposites prepared from 7 nm silica particles possessed suitable mesopores, whereas the corresponding nanocomposites prepared fr

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7

Ham, Kyeong-Min, Minhee Kim, Sungje Bock, et al. "Highly Bright Silica-Coated InP/ZnS Quantum Dot-Embedded Silica Nanoparticles as Biocompatible Nanoprobes." International Journal of Molecular Sciences 23, no. 18 (2022): 10977. http://dx.doi.org/10.3390/ijms231810977.

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Quantum dots (QDs) have outstanding optical properties such as strong fluorescence, excellent photostability, broad absorption spectra, and narrow emission bands, which make them useful for bioimaging. However, cadmium (Cd)-based QDs, which have been widely studied, have potential toxicity problems. Cd-free QDs have also been studied, but their weak photoluminescence (PL) intensity makes their practical use in bioimaging challenging. In this study, Cd-free QD nanoprobes for bioimaging were fabricated by densely embedding multiple indium phosphide/zinc sulfide (InP/ZnS) QDs onto silica template

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8

Wood, D. L., and E. M. Rabinovich. "Study of Alkoxide Silica Gels by Infrared Spectroscopy." Applied Spectroscopy 43, no. 2 (1989): 263–67. http://dx.doi.org/10.1366/0003702894203282.

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The infrared spectra of silica gels made from alkoxides are different from those made from fumed silica, and from the infrared spectra of other amorphous silicas in which the SiO2 network is relatively complete. One important feature of these spectra is the occurrence of an absorption band at 960 cm−1 due to the vibration of dangling -Si-OH bonds in the alkoxide gels, which is not present in many other silicas. There also are less well-defined absorption bands due to structural defects for the alkoxide gels, but their interpretation is speculative. Dried gels made with more concentrated reacta

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Zhi, Xintao, Xiaopeng Li, Songmei Yuan, Dasen Wang, and Kehong Wang. "Influence of Thermal Annealing on Mechanical and Optical Property of SiO2 Film Produced by ALD." Materials 17, no. 2 (2024): 470. http://dx.doi.org/10.3390/ma17020470.

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The application range of fused silica optical components can be expanded and the cost of fused silica components can be reduced by depositing the same material film on fused silica substrate. However, due to the different manufacturing process, the performance of ALD SiO2 film is lower than that of fused silica substrate, which also limits the use of this process. In this paper, ALD SiO2 film with different thicknesses were deposited, and then the structure and properties were tested. Finally, the ALD SiO2 film was treated via the annealing process. Transmission electron microscopy (TEM) showe

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10

Ma, Guang Hui, Fa Ai Zhang, and Chang Sheng Gu. "Preparation of Polymer Microspheres Using Silane Coupling Agent Modified Nano-SiO₂ as Single Stabilizer." Advanced Materials Research 341-342 (September 2011): 247–51. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.247.

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This paper demonstrates that silica nanoparticles were modified by the four silane coupling agents (KH-151, KH-550, KH-560, KH-570) firstly, then polystyrene/silica (PS/SiO2) composite microsphere with PS core and silica nanoparticles shell were prepared by Pickering emulsion polymerization. The characterization of optical microscope (OM), scanning electron microscope (SEM), and thermogravimetic analysis ( TGA) illustrates that these microsphere are composed of PS and silica nanoparticles. Silica nanoparticles modified by the different silane coupling agents could form the stable PS/SiO2 micro

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11

Nahari, Anisa, Budhi Oktavia, Miftahul Khair, and Ananda Putra. "Adsorpsi Anion Nitrat Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina." Jurnal Periodic Jurusan Kimia UNP 11, no. 3 (2022): 35. http://dx.doi.org/10.24036/p.v11i3.115920.

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Silica or silicon dioxide is a chemical compound with the molecular formula SiO2 which can be obtained from the synthesis of crystals, silica minerals, and vegetables. Compounds resulting from the polymerization of silicic acid, which are composed of a tetrahedral SiO4 unit chain with the general formula SiO2. Each silica atom is surrounded by four oxygen atoms. Silica forms a polyhedral network, where the bonds between oxygen tetrahendral are one and the other. Silica will form a framework that has pores that are quite open and allow other molecules to enter and undergo adsorption on the surf

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12

Putri, Ariyanti Rasiana, and Munasir MUNASIR. "REVIEW: LAPISAN SUPERHIDROFOBIK BERBASIS SILIKA SEBAGAI APLIKASI SELF-CLEANING." Inovasi Fisika Indonesia 12, no. 2 (2023): 66–81. http://dx.doi.org/10.26740/ifi.v12n2.p66-81.

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Teknologi self-cleaning sangat popular di kalangan para peneliti dan telah banyak diterapkan dalam berbagai aplikasi permukaan. Lapisan self-cleaning dengan sifat superhidrofobik banyak dikembangkan dan diteliti lebih lanjut karena kemampuannya dalam melakukan pembersihan yang sangat baik. Kemampuan self-cleaning lapisan superhidrofobik berbasis silika (SiO2) banyak diteliti. SiO2 dianggap dapat meningkatkan kekasaran suatu permukaan karena memiliki energi permukaaannya yang rendah dan menunjukkan sifat hidrofobik, hidrofilik, dan kestabilan termal. Lapisan superhidrofobik berbasis silika tela

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13

Kumar, Kakara S. J., M. V. Seshagiri Rao, V. Srinivasa Reddy, and S. Shrihari. "Stress - strain behaviour of confined nano silica-based concrete." E3S Web of Conferences 309 (2021): 01048. http://dx.doi.org/10.1051/e3sconf/202130901048.

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In the present study, the stress-stain behaviour of confined concrete made with nano-silica (nano-SiO2) were taken up. The stress-strain behaviour was studied for the M30 and M50 grades nano-silica (nano-SiO2) concrete mixes confined with steel rebars. The confinement was given in the form of steel hoops in the cylinders, 3 hoops (0.8%), 4 hoops (1.1%), 5 hoops (1.3%) and 6 hoops (1.6%). The addition of nano-silica (nano-SiO2) along with confinement of concrete with steel hoops enhanced the compressive strength, indicating further confinement effect in the concrete. It is observed that the add

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14

Wang, Kang Jun, Jing Wu, and Ping Yu. "Pd Nanoparticles Fabricated on Organic-Group Modified Silica and its Catalytic Performance for Acetylene Hydrogenation." Advanced Materials Research 233-235 (May 2011): 1884–88. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1884.

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Aminopropyl-functionalized silica (NH2-SiO2) was obtained via a sol-gel process using tetraethoxylsilicate (TEOS) and aminopropyltriethoxysilane (APTES). Aminopropyl group contained silica was further modified with formaldehyde to achieve a novel organic group modified silica, denoted as CH2O-SiO2. Using CH2O-SiO2 as support to prepare surported Pd catalyst (denoted as Pd/M-SiO2), small Pd nanoparticles (1-2 nm) were fabricated on CH2O-SiO2 surport. Hydrogenation of acetylene is used as probe reaction to evaluate the catalytic performance of Pd/M-SiO2. The results indicate that Pd/M-SiO2 exhib

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15

Li, Jie, Jia Zhang, ZhuoQiong Wen, Cui Yu, and XiaoPeng Li. "Differential Selective Etching of Functional Groups Strategy for Preparation of Organic Hollow Porous Silica." E3S Web of Conferences 252 (2021): 02051. http://dx.doi.org/10.1051/e3sconf/202125202051.

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In this study, different structural of organic hollow porous silica were prepared based on differential selective etching of functional groups strategy, using ammonia as catalyst, cetyltrimethylammonium bromide (CTAB) as pore-forming agent and emulsifier, cyano silica (CN-SiO2) or vinyl silica (V-SiO2) formed by hydrolysis condensation of 2-cyanoethyl triethoxysilane (CTES) or vinyl triethoxysilane (VTES) were used as cores, NH-SiO2 prepared by 3-aminopropyl triethoxysilane (APTES), SH-SiO2 prepared by mercaptopropyl trimethoxysilane (MPTMS) and UD-SiO2 prepared by urea-propyl triethoxysilane

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16

Zarko, V. I., and V. M. Gun'ko. "Relaxation Processes of Water Molecules on Surfaces of Highly Dispersed Silica and Titania/Silica." Adsorption Science & Technology 14, no. 5 (1996): 331–37. http://dx.doi.org/10.1177/026361749601400507.

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Analyses of dielectric spectra and theoretical simulation results demonstrate that the most probable sites for water cluster adsorption are the B-sites at the TiO2/SiO2 (TS) phase boundary regions and the SiOH groups on the SiO2 phase in TS. The amount of water on SiO2 in TS is lower than for pure SiO2 for the same content of water at the TiO2/SiO2 and SiO2 surfaces. The energy necessary for the rotation of a water molecule is a maximum for molecules linked via one electron-donor bond M←OH2 and three hydrogen bonds with other water molecules.

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17

Ci, Ji Liang, Feng Dan Cui, Li Li Zhang, et al. "Study on the Highe-Temperature Mechanical of Al<sub>2</sub>O<sub>3f</sub>/SiO<sub>2</sub> and SiO<sub>2f</sub>/SiO<sub>2</sub> Ceramic Matrix Composites." Solid State Phenomena 330 (April 12, 2022): 91–98. http://dx.doi.org/10.4028/p-6kd5u0.

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Al2O3f/SiO2 and SiO2f/SiO2 ceramic matrix composites were manufactured by silica sol-infiltration-sintering method. The mechanical properties of composites under room temperature to 1200 °C were tested on-line with universal testing machine. It is found that Al2O3f/SiO2 composites present a higher strength than SiO2f/SiO2 at room temperature and 1000 °C. The strength of two composites dramatic decrease with temperature increased to 1200 °C. Also, SEM and XRD methods were adopted to investigate the micro-structure of cross-fraction and crystal phase of composites, indicating a strong interactio

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18

Hahm, Eunil, Ahla Jo, Eunji Kang, et al. "Silica Encapsulation of Hydrophobic Optical NP-Embedded Silica Particles with Trimethoxy(2-Phenylethyl)silane." Nanomaterials 13, no. 14 (2023): 2145. http://dx.doi.org/10.3390/nano13142145.

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Nanoparticles (NP) with optical properties embedded silica particles have been widely used in various fields because of their unique properties. The surfaces of optical NPs have been modified with various organic ligands to maintain their unique optical properties and colloidal stability. Among the surface modification methods, silica encapsulation of optical NPs is widely used to enhance their biocompatibility and stability. However, in the case of NPs with hydrophobic ligands on the surface, the ligands that determine the optical properties of the NPs may detach from the NPs, thereby changin

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19

Lee, Kyoung-Jin, Yanggu Kang, Young Hun Kim, Se Won Baek, and Haejin Hwang. "Synthesis of Silicon Carbide Powders from Methyl-Modified Silica Aerogels." Applied Sciences 10, no. 18 (2020): 6161. http://dx.doi.org/10.3390/app10186161.

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β-silicon carbide (SiC) powders were synthesized by the carbothermal reduction of methyl-modified silica aerogel/carbon mixtures. The correlations between the phase evolution and morphologies of the SiC powders and the C/SiO2 ratio were investigated. At a C/SiO2 ratio of 3, β-SiC formed at 1425 °C and single-phase SiC powders were obtained at 1525 °C. The methyl groups (-CH3) on the silica aerogel surfaces played important roles in the formation of SiC during the carbothermal reduction. SiC could be synthesized from the silica aerogel/carbon mixtures under lower temperature and C/SiO2 ratios t

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Zhang, Xia, Bo Xiao, Yongzhao Hou, and Guangwu Wen. "Performance Optimization of SiO2f/SiO2 Composites Derived from Polysiloxane Ceramic Precursors." Molecules 30, no. 6 (2025): 1385. https://doi.org/10.3390/molecules30061385.

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In this paper, polymethylhydrosiloxane (PMHS) and ethanol were used as raw materials to synthesize the ceramic precursor of side ethoxy polysiloxane (PESO) using dehydration and a dealcoholization reaction, which had a ceramic yield of 87.15% and a very low residual carbon content. With the quartz fiber as a reinforcer, the silica matrix composites (SiO2f/SiO2) with a double-layer interface (PyC-SiO2/BNNSs) coating were manufactured using precursor impregnation pyrolysis (PIP). The as-prepared SiO2f/SiO2 possessed an excellent mechanical property, which exhibited obvious fiber pull-out and deb

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Jan, Lal Said, Radiman Shahidan, and Iskandar Idris Yaacob. "Nano-Porous Silica (SiO₂) and Iron-Silica (Fe₂O₃-SiO₂ ) Composite Synthesis via Reverse Microemulsion for Catalytic Applications." Key Engineering Materials 306-308 (March 2006): 1127–32. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1127.

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Nanostructured silica and silica-iron composite particles were prepared using water-in-oil (w/o) reverse microemulsion. Double microemulsion technique is used for the synthesis of both types of nanostructured particles. X-ray Diffractometry (XRD), scanning electron microscopy (SEM), nitrogen gas adsorption-desorption isotherm technique, and differential scanning calorimetry (DSC) were used to characterize the synthesized particles. The gas adsorptiondesorption measurements revealed a mesoporous structure for the silica (SiO2) particles with a surface area of 300.49 m2/g. Upon the addition of a

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22

Lee, Jiyoung, Ha Soo Hwang, Tien N. H. Lo, Won-Gun Koh, and In Park. "Effect of Silica Size and Content on Superamphiphobic Properties of Silica-Fluoropolymer Core-Shell Coatings." Polymers 12, no. 12 (2020): 2864. http://dx.doi.org/10.3390/polym12122864.

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We present a facile approach to fabricate superamphiphobic surfaces by spray coating silica-fluoropolymer core-shell particles without substrate pretreatment with an additional binder resin. A series of SiO2@poly(1H,1H,2H,2H-heptadecafluorodecyl methacrylate) (SiO2@PFMA) core-shell particles with core particles of different sizes were prepared via thiol-lactam initiated radical polymerization (TLIRP). The surface of each SiO2 particle with an average particle size of 12, 80, 150, and 350 nm was modified with (3-mercaptopropyl) trimethoxysilane and used as a seed for TLIRP. The SiO2@PFMA partic

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Romolini, G., M. Gambucci, D. Ricciarelli, L. Tarpani, G. Zampini, and L. Latterini. "Photocatalytic activity of silica and silica-silver nanocolloids based on photo-induced formation of reactive oxygen species." Photochemical & Photobiological Sciences 20, no. 9 (2021): 1161–72. http://dx.doi.org/10.1007/s43630-021-00089-9.

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AbstractSemiconductor nanomaterials are often proposed as photocatalysts for wastewater treatment; silica nanomaterials are still largely unexploited because their photocatalytic performances need improvements, especially under visible light. The present study is a proof-of-concept that amorphous silica colloids once submitted to the proper surface modifications change into an efficient photocatalyst even under low-energy illumination source. For this reason, silica-based colloidal nanomaterials, such as bare (SiO2 NPs), aminated (NH2-SiO2 NPs), and Ag NPs-decorated (Ag-SiO2 NPs) silica, are t

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Lebedev, М. D., A. A. Goncharenko, I. A. Skvortsov, M. S. Kuzmikov, and A. S. Vashurin. "Preparation of New Hybrid Materials SiO2@Melamine-Cyanurate as Precursors of Graphite-Like Carbon Nitride." Žurnal neorganičeskoj himii 69, no. 4 (2024): 480–87. http://dx.doi.org/10.31857/s0044457x24040038.

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This work describes the use of silica particles obtained by sol-gel method as a templat for deposition of supramolecular complexes of melamine cyanurate. To obtain SiO2@melamine-cyanurate (SiO2@MCA) material, the method of covalent modification of silica surface by melamine molecules (SiO2-mel) was applied and the method of its further functionalization by hydrogen-bonded organic framework of melamine-cyanurate (HOF, MCA) was proposed. One of the promising directions of using SiO2@melamine-cyanurate is obtaining SiO2@g-C3N4 material on its basis. Control of the amount of applied melamine-cyanu

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Taufik, Taufik, Zulkarnain A. Jalil, and Mursal Mursal. "Use of SiO2 Rice Husk Ash and Ni in Materials Solid Hydrogen Storage Based on MgH2." Journal of Aceh Physics Society 9, no. 1 (2020): 9–12. http://dx.doi.org/10.24815/jacps.v9i1.15047.

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Telah dilakukan penyisipan silika (SiO2) dan nikel (Ni) ke dalam MgH2 dengan menggunakan teknik preparasi mechanical alloying. Hasil observasi dengan XRD menunjukkan bahwa proses pemilingan selama 2 jam material MgH2 + Ni + SiO2 berhasil direduksi hingga skala nanokristal. Fasa yang muncul, dari hasil pengujian dengan XRD adalah fasa MgH2 sebagai fasa utama, sedangkan fasa Ni dan fasa SiO2 sebagai fasa minor. Hasil pengamatan dengan TGA pada sampel MgH2 + 5 %wt Ni + 3 %wt SiO2,hidrogen mengalami desorpsi pada temperatur 362,04oC sebesar 10,3 %wt selama 3,58 menit. Hasil pengamatan pada sampel

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Nggolaon, Delpina, Stevi Silahooy, Gede Wiratma Jaya, and Nikmans Hattu. "Analisis dan Karakterisasi Senyawa Silika (Sio2) Berbahan Dasar Batuan Vulkanik di Pulau Ambon." Jurnal Kumparan Fisika 7, no. 3 (2024): 98–105. https://doi.org/10.33369/jkf.7.3.98-105.

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ABSTRAK Penelitian ini bertujuan untuk melakukan analisis dan karakterisasi senyawa silika (SiO2) berbahan dasar batuan vulkanik di Pulau Ambon yang diekstraksi menggunakan metode kopresipitasi. Hal ini dikarenakan material senyawa silika merupakan salah satu material maju yang saat ini berperan pesat dalam dunia industri karena memiliki banyak keunggulan. Proses analisis dilakukan terhadap hasil pengujian karakterisasi menggunakan beberapa instrumen, antara lain XRF, XRD, dan SEM. Berdasarkan hasil uji XRF, serbuk silika mampu dimurnikan menjadi sebesar 47,40 wt %. Hal ini dikarenakan metode

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Lestari, Hilda Puspa, and Wisnu Ari Adi. "Studi Sintesis dan Karakterisasi Komposit Upr/Core-Shel Fe3O4-SiO2 Berbahan Dasar Sekam Padi sebagai Material Penyerap Gelombang Mikro." JRSKT - Jurnal Riset Sains dan Kimia Terapan 10, no. 2 (2024): 169–76. http://dx.doi.org/10.21009/jrskt.102.04.

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Abstrak Penelitian ini bertujuan untuk mensintesis komposit UPR/core-shell berbahan dasar sekam padi sebagai penyerap gelombang mikro. Pada penelitian ini material yang digunakan adalah silika, dan magnetit. Material silika dihasilkan dari sekam padi dengan menggunakan metode sol-gel, sedangkan Fe3O4 dihasilkan dari proses elektrolisis. Kedua material ini kemudian digabungkan menjadi satu membentuk sebuah core-shell dimana magnetit (Fe3O4) sebagai core (bagian inti) dan silika (SiO2) sebagai shell (bagian luar). Selanjutnya dilakukan pembuatan komposit dengan core-shell Fe3O4 - SiO2sebagai fil

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Rahayu, Endang Sri, Desi Bentang, and Ghina Fauziyyah. "Penggunaan Kembali Limbah Cair dari Sintesis Zeolit Y sebagai Sumber Silika untuk Sintesis Zeolit Y secara Hidrotermal." Jurnal Teknik Kimia Indonesia 18, no. 2 (2020): 53. http://dx.doi.org/10.5614/jtki.2019.18.2.4.

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Abstrak. Penelitian ini dilakukan untuk mempelajari kemungkinan limbah cair atau mother liquor dari sintesis zeolit Y yang masih mengandung silika dapat digunakan kembali sebagai sumber silika untuk sintesis zeolit Y, dengan menambahkan bibit kristal dan alumina ke dalam limbah cair. Sintesis zeolite Y dilakukan secara hidrotermal pada temperatur 93oC dan pH sekitar 13. Rasio molar silika /alumina sekitar 10 mol/mol di dalam starting material diperlukan untuk mendukung terbentuknya zeolit Y. Seberapa banyak turunan atau penggunaan kembali limbah cair sintesis zeolit Y untuk sintesis zeolit Y,

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Wang, Lei, Huihui Wan, Shaohua Jin, Xiao Chen, Chuang Li, and Changhai Liang. "Hydrodeoxygenation of dibenzofuran over SiO2, Al2O3/SiO2 and ZrO2/SiO2 supported Pt catalysts." Catalysis Science & Technology 5, no. 1 (2015): 465–74. http://dx.doi.org/10.1039/c4cy00859f.

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Suprompituk, Wanchart, Thana Radpakdee, Nantiwat Pholdee, and Papot Jaroenapibal. "Effects of TEOS Precursor and Reaction Time on the Synthesis of Silica Coated Single-Walled Carbon Nanotubes." Materials Science Forum 872 (September 2016): 248–52. http://dx.doi.org/10.4028/www.scientific.net/msf.872.248.

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This paper demonstrates a technique to synthesize silica-coated single-walled carbon nanotubes (SWNTs@SiO2) based on sodium dodecyl sulfate (SDS), 3-aminopropyltriethoxysilane (APTES), ammonium hydroxide (NH4OH) and tetraethyl orthosilicate (TEOS). The coating of silica is done to promote bond strength between SWNTs@SiO2 and other materials. The anionic surfactant used in the coating process helps create linkages between the silica coupling agent and the SWNTs’ walls without compromising the excellent properties of SWNTs. Scanning electron microscopy (SEM), transmission electron microscopy (TE

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Zych, Łukasz, Anna Maria Osyczka, Agnieszka Łacz, et al. "How Surface Properties of Silica Nanoparticles Influence Structural, Microstructural and Biological Properties of Polymer Nanocomposites." Materials 14, no. 4 (2021): 843. http://dx.doi.org/10.3390/ma14040843.

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The aim of this work was to study effect of the type of silica nanoparticles on the properties of nanocomposites for application in the guided bone regeneration (GBR). Two types of nanometric silica particles with different size, morphology and specific surface area (SSA) i.e., high specific surface silica (hss-SiO2) and low specific surface silica (lss-SiO2), were used as nano-fillers for a resorbable polymer matrix: poly(L-lactide-co-D,L-lactide), called PLDLA. It was shown that higher surface specific area and morphology (including pore size distribution) recorded for hss-SiO2 influences ch

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Xu, Qingna, Tongchao Ji, Qingfeng Tian, et al. "Structural Adjustment of In-Situ Surface-Modified Silica Matting Agent and Its Effect on Coating Performance." Nano 13, no. 12 (2018): 1850137. http://dx.doi.org/10.1142/s1793292018501370.

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A series of silica surface-capped with hexamethyldisilazane (denoted as H-SiO2) were prepared by liquid-phase in-situ surface-modification method. The as-obtained H-SiO2 was incorporated into acrylic amino (AA) baking paint to obtain AA/H-SiO2 composite extinction paints and/or coatings. N2 adsorption–desorption tests were conducted to determine the specific surface area as well as pore size and pore volume of H-SiO2. Moreover, the effects of H-SiO2 matting agents on the physical properties of AA paint as well as the gloss and transmittance of AA-based composite extinction coatings were invest

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Kobayashi, Yoshio, Hikaru Morimoto, Tomohiko Nakagawa, Yohsuke Kubota, Kohsuke Gonda, and Noriaki Ohuchi. "Preparation of Gd Complex-Immobilized Silica Particles and Their Application to MRI." ISRN Nanotechnology 2013 (April 10, 2013): 1–6. http://dx.doi.org/10.1155/2013/908614.

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A preparation method for Gd-ethylenediaminetetraacetic acid disodium salt dihydrate (ETDA) complex-immobilized silica particles (Gd-EDTA/SiO2) is proposed. Preparation of spherical silica particles was performed by a sol-gel method at 35°C using 0.2 M tetraethylorthosilicate, 25 M H2O, and 0.01 M NaOH in ethanol, which produced silica particles with an average size of nm. Immobilization of Gd-EDTA on the silica particles was conducted at 35°C by introducing amino groups on the silica particles with (3-aminopropyl)trimethoxysilane at pH 3 (NH2/SiO2) and then making Gd-EDTA act on the NH2/SiO2 p

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Buzato, Gabriel V., Pedro H. P. Olívio, and Adriano L. Souza. "Silica Xerogel Modified with Cetyltrimethylammonium Bromide as an Effective Adsorbent for Methyl Orange Dye." Materials Science Forum 1121 (May 14, 2024): 85–96. http://dx.doi.org/10.4028/p-od9juf.

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The study of water treatment technologies has been growing due to mounting concerns regarding dye contamination. Adsorption-based technologies that use porous materials have been proven useful in water decontamination. However, porous silica xerogels have not been extensively explored as adsorbents for the methyl orange (MO) dye. In this study, the MO-adsorptive behavior of silica xerogels was investigated. Two silica xerogels were synthesized using tetraethyl orthosilicate, and one was modified with cetyltrimethylammonium bromide (CTAB). The adsorptive capacities of the unmodified silica xero

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Fabiani, Verry Andre, and Ristika Oktavia Asriza. "PENGARUH SILIKA SEKAM PADI PADA SINTESIS KOMPOSIT Fe3O4/KITOSAN/SiO2 DAN UJI ADSORPSI LOGAM Cu(II)." JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) 4, no. 2 (2022): 62–68. https://doi.org/10.36378/jedchem.v4i2.2463.

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Synthesis of Fe3O4/chitosan/SiO2 composites has been carried out. This study observed the effect of rice husk silica on the synthesis of Fe3O4/Chitosan/SiO2 composites and the Cu (II) Metal Adsorption Test. The synthesis was carried out by synthesizing Fe3O4, preparing chitosan from rajungan shells, extracting silica from rice husks and synthesizing Fe3O4/chitosan/SiO2 Composite composites. Rice husk silica which was varied with a mass of 0.5; 0.75; and 1 gram. The results of XRD analysis showed the presence of Fe3O4 phase and SiO2 phase and crystalline structure. Composite adsorption test on

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Ma, Lan, Pingya Luo, Yi He, Liyun Zhang, Yi Fan, and Zhenju Jiang. "Ultra-Stable Silica Nanoparticles as Nano-Plugging Additive for Shale Exploitation in Harsh Environments." Nanomaterials 9, no. 12 (2019): 1683. http://dx.doi.org/10.3390/nano9121683.

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Owing to the harsh downhole environments, poor dispersion of silica at high salinity and high temperature can severely restrict its application as the nano-plugging agent in shale gas exploitation. The objective of this study is to improve salt tolerance and thermal stability of silica. Herein, silica was successfully functionalized with an anionic polymer (p SPMA) by SI-ATRP (surface-initiated atom transfer radical polymerization), named SiO2-g-SPMA. The grafted pSPMA brushes on silica provided sufficient electrostatic repulsion and steric repulsion for stabilizing silica in a harsh environme

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Kamoun, Olfa, Abdelaziz Gassoumi, Salah Kouass, Badriyah Alhalaili, Ruxandra Vidu, and Najoua Turki-Kamoun. "An Investigation on the Synthesis of Molybdenum Oxide and Its Silica Nanoparticle Composites for Dye Degradation." Nanomaterials 10, no. 12 (2020): 2409. http://dx.doi.org/10.3390/nano10122409.

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The molybdenum oxide (MoO3) and MoO3@SiO2 nanoparticles were successfully prepared using the chemical bath deposition (CBD) method. The photocatalytic activities of molybdenum oxide (MoO3), SiO2, and MoO3@SiO2 nanoparticles composite have shown a synergistic photocatalytic effect of SiO2 combined with MoO3. The first-order degradation rate constants for MoO3, SiO2, and MoO3@SiO2 nanocomposite were 10.3 × 10−3 min−1, 15.1 × 10−3 min−1, and 16.3 × 10−3 min−1, respectively. The MoO3@SiO2 composite showed degradation efficiencies in the methylene blue solution close to 100% after 60 min of UV irra

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Han, Shu Ang, Kai Hui Jiang, and Jun Wu Tang. "Studies on Preparation and Property of 2.5D SiO_2f/ SiO₂ Composites." Advanced Materials Research 79-82 (August 2009): 1767–70. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1767.

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In this paper, 2.5D SiO2f/SiO2 composites were fabricated via sol-gel process employing 2.5D braided silica fiber fabrics as reinforcements and high pure silicasol as slurry. The process parameters are optimized and the optimal parameters are as follows: the silicasol of 30.8 wt. % as slurry, microwave drying, and sintering at 900 °C. Utilizing the optimal process parameters, the density and the flexural strength of the composites can reach 1.65 g•cm-3 and 80.68 MPa respectively. Dielectric properties of the 2.5D SiO2f/SiO2 composites were also measured, and the real part of the permittivity i

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Shang, Qian Qian, Hu Liu, and Guo Min Xiao. "Facile Fabrication of Superhydrophobic Surface via SiO₂/Fluoro-Containing Polymer Composite Particles." Advanced Materials Research 634-638 (January 2013): 1922–26. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1922.

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SiO2/fluoro-containing polymer (SiO2/PFS) composite particles consisting of a vinyl-functional silica core with grafted mixed block copolymer were prepared by emulsion polymerization with styrene and 1H,1H,2H,2H-perfluorooctyl methacrylate as the reaction monomers. Vinyl-functional silica spheres and SiO2/PFS composite particles were characterized by SEM, FT-IR spectroscopy, TEM and XPS. The results indicate that fluoro-containing polymer has been successfully grafted onto the surface of vinyl-functional silica sphere and SiO2/PFS particle has a core-shell structure. The SiO2/PFS coating posse

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Chesnokov, V. V., A. S. Chichkan, V. S. Luchihina, et al. "Synthesis of “Silica – Carbon Nanotubes” Composite and Investigation of its Properties." Eurasian Chemico-Technological Journal 17, no. 2 (2015): 95. http://dx.doi.org/10.18321/ectj199.

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A new method for synthesis of CNT-SiO2 composite was developed. Oligomethylhydridesiloxane (OMHS) was used as the SiO2 precursor. The presence<br />of active hydrogen in the composition of OMHS made it possible to obtain chemical<br />interaction between the surface of carbon nanotubes and the deposited silica layer. The effect of the silica film on the CNT oxidizing ability was studied. It was found that the oxidation rate of the CNT-SiO2 composite decreases approximately by an order of magnitude in comparison with as-prepared CNT. The morphology and<br />structure of amorph

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Jeziorska, Regina, Agnieszka Szadkowska, and Maciej Studzinski. "Morphology and Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)/Polyamide 11 Hybrid Nanocomposites: Effect of Silica Surface Modification." Materials 15, no. 10 (2022): 3421. http://dx.doi.org/10.3390/ma15103421.

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Poly(2,6-dimethyl-1,4-phenylene oxide)/polyamide 11 (PPO/PA11 80/20) blend filled with neat (SiO2) or modified silica having amine functional groups (A-SiO2) was melt mixing in a twin-screw extruder. The silica was prepared by the sol–gel process. SEM shows that, with increasing A-SiO2 content from 1 to 5 wt.%, the morphology of PPO/PA11blend changed from droplet matrix to co-continuous with phase inversion. The phase inversion was also observed for 5 wt.% of neat silica, but the droplet-matrix structure was retained. The overall rheological and mechanical properties improvement of the A-SiO2-

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Tarru, Reni Oktaviani. "Studi Penggunaan Silica Fume Sebagai Bahan Pengisi (Filler) Pada Campuran Beton." Journal Dynamic Saint 3, no. 1 (2018): 472–85. http://dx.doi.org/10.47178/dynamicsaint.v3i1.271.

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Enter an abstract of up to 250 words for all articles. This is a concise summary of the whole paper, not just the conclusions, and is understandable without reference to the rest of the Silica fume merupakan produk sampingan (biproduct) dari suatu proses industri silicon metal. Silica fume mengandung kadar SiO2 yang tinggi dan merupakan bahan sangat halus, berbentuk butiran, sangat kecil, dan biasanya disePbut dengan mikro silika. Silica fume mengandung unsur SiO2 lebih dari 85% dengan demikian silica fume dapat dikategorikan sebagai pozzoland. Terdapat kelebihan tersendiri apabila kita menggu

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Hasri, H., F. Fauziah, and Putra Jaya Negara. "Sintesis Nanosilika Pasir Pantai Takalar Menggunakan Metode Hidrotermal." Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam 10, no. 2 (2021): 165. http://dx.doi.org/10.35580/sainsmat102262212021.

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Sintesis nanosilika memerlukan bahan yang mengandung senyawa silika yang banyak, Penelitian menunjukkan bahwa di antara sumber silika terbanyak ada pada pasir pantai. Telah dilakukan penelitian sintesis nanosilika dari pasir pantai Takalar dengan menggunakan metode hidrotermal. Ada beberapa metode yang bisa digunakan untuk sintesis nanosilika, di antaranya kopresipitasi, sol gel dan hidrotermal. Metode dengan cara yang paling mudah dan membutuhkan biaya yang tidak terlalu besar adalah metode hidrotermal. Hasil menunjukkan nanosilika yang dihasilkan memiliki kadar silika (SiO2) sebesar 59,82 Ad

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Aziz, Abdul, Setyo Budi Utomo, and Davina Nur Ramadhina. "Analisis Kadar Silika Dioksida pada Sistem Pemurnian Air Kolam Reaktor Serba Guna G.A. Siwabessy dengan Spektrofotometer UV-VIS." JRSKT - Jurnal Riset Sains dan Kimia Terapan 9, no. 2 (2024): 81–90. http://dx.doi.org/10.21009/jrskt.092.05.

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Abstrak Reaktor Serba Guna G.A. Siwabessy (RSG-GAS) adalah reaktor riset yang menggunakan air sebagai pendingin. Air pendingin reaktor berfungsi sebagai moderator dan media pemindah panas yang timbul sebagai akibat terjadinya reaksi fisi dalam teras reaktor. Air sebagai pendingin akan berhubungan langsung dengan material komponen atau struktur reaktor, sehingga memungkinkan akan terjadi reaksi kimia antara air dan material komponen atau struktur reaktor yang dapat menyebabkan terjadinya korosi atau timbulnya kerak pada permukaan logam sehingga menurunkan efisiensi pertukaran panas. Dalam penel

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45

Wibowo, Emas Agus Prastyo, Adi Wahyu Arzanto, Khoironni Devi Maulana, and Aden Dhana Rizkita. "PREPARASI DAN KARAKTERISASI NANOSILIKA DARI JERAMI PADI." JURNAL ILMIAH SAINS 18, no. 1 (2018): 35. http://dx.doi.org/10.35799/jis.18.1.2018.19089.

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PREPARASI DAN KARAKTERISASI NANOSILIKA DARI JERAMI PADIABSTRAKPenelitian ini dilakukan untuk mengetahui karakteristik silika yang diekstraksi dari jerami padi yang diperoleh dari wilayah usaha tani padi Pekalongan. Silika diperoleh dengan metode sol-gel, yang melibatkan ekstraksi silika dengan larutan alkali dan gelasi silika menggunakan larutan asam. Ditemukan bahwa hasil tertinggi diperoleh dari ekstraksi menggunakan larutan KOH 5% dengan waktu ekstraksi 60 menit, dan pH gelasi 7.0. Persiapan berhasil diproduksi dengan memanaskan jerami padi pada suhu 10 °C/menit dan menahannya pada suhu 500

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de Sousa, Ana Maria, Leila Visconte, Claudia Mansur, and Cristina Furtado. "Silica Sol Obtained from Rice Husk Ash." Chemistry & Chemical Technology 3, no. 4 (2009): 321–26. http://dx.doi.org/10.23939/chcht03.04.321.

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Rice husk ash was used to produce sodium silicate with SiO2/Na2O=3. The investigation of NaOH concentration and temperature on the silica conversion showed that NaOH has positive influence. SiO2/Na2O  3 was produced with 0.8 mol/l of NaOH and 403/453 K. These solutions were used to produce silica sol with diameter of 5nm.

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47

Buzato, Gabriel Vinicius, Giovanni Gomes Daniele, and Adriano Lopes de Souza. "Modification of a silicate xerogel with cetyltrimethylammonium bromide for the adsorption of tartrazine yellow dye." Brazilian Journal of Development 11, no. 1 (2025): e76677. https://doi.org/10.34117/bjdv11n1-039.

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Synthetic dyes present in industrial wastewater cause adverse effects on aquatic organisms and humans. Tartrazine yellow (TY) is an anionic dye used in textiles, cosmetics, and food industries, which has adverse effects on diet consumption. An alternative method for removing residues from wastewater is the adsorption process using silica xerogels. Though the use of silica materials as adsorbents of dyes has already been studied, xerogels used for this purpose have not yet completely known. The work reported here describes the study of the adsorption capacities of two silica xerogels, prepared

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Radev, Lachezar, Liliana Pavlova, Bisserka Samuneva, et al. "Sol-gel synthesis and structure of La2O3-CoO-SiO2 powders." Processing and Application of Ceramics 2, no. 2 (2008): 103–8. http://dx.doi.org/10.2298/pac0802103r.

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LaCoO3 powders are studied because they exhibit interesting electrical, magnetic and catalytic properties. In this paper, new synthesized La2O3-CoO-SiO2 powders with different quantity of silica were prepared via solgel method in aqua media, starting from metal nitrates with different chelating agents. The relation between the reaction in solution, crystallization pathway and morphology were discussed. In LaCoO3-SiO2 powders, depending on the content of SiO2 and the treatment temperature (700-1100?C), different crystalline phases (LaCoO3, Co2 SiO4 and La9.31 (SiO4 )6 O2) were observed with the

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Nowacka, Magdalena, Łukasz Klapiszewski, Małgorzata Norman, and Teofil Jesionowski. "Dispersive evaluation and surface chemistry of advanced, multifunctional silica/lignin hybrid biomaterials." Open Chemistry 11, no. 11 (2013): 1860–73. http://dx.doi.org/10.2478/s11532-013-0322-4.

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AbstractAdvanced silica/lignin hybrid biomaterials were obtained using hydrated or fumed silicas (Aerosil®200) and Kraft lignin as precursors, which is a cheap and biodegradable natural polymer. To extend the possible range of applications, the silicas were first modified with N-2-(aminoethyl)-3-aminopropyltrimethoxsysilane, and then with Kraft lignin, which had been oxidized with sodium periodate. The SiO2/lignin hybrids and precursors were characterised by means of determination of their physicochemical and dispersive-morphological properties. The effectiveness of silica binding to lignin wa

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Junaidi, Junaidi, Wiwin Sulistiani, Yessi Efridahniar, et al. "Synthesis and Characterization of Ag/SiO<sub>2</sub> Nanocomposite Based on Rice Husk Silica Using Sol-Gel Method." Journal of Nano Research 78 (April 17, 2023): 31–42. http://dx.doi.org/10.4028/p-54swgk.

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In this study, silver-silica (Ag/SiO2) was synthesized using the sol-gel method by silica from rice husks. Silica derived from rice husk waste was previously synthesized using the sol gel method. In addition, the Ag material used in this study was also performed into silver nanoparticles (AgNPs). This method was chosen to obtain an Ag/SiO2 composite with nano size and high purity. AgNPs were synthesized using silver nitrate (AgNO3) by reduction method at 90 °C. The reducing agent and stabilizer used is trisodium citrate. UV-Vis, FTIR, XRD, and SEM-EDX were used for the analysis Ag/SiO2 composi

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