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Journal articles on the topic 'Silica obtained from rice husk'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

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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2

Zainal, Nur Saadah, Zaleha Mohamad, Mohammad Sukri Mustapa, Nur Azam Badarulzaman, Mohd Idrus Masirin, and Zainathul Akhmar Salim Abdul Salim. "Study of Characteristics of Rice Husk and Silica Obtained from Rice Husk." International Journal of Chemical Engineering and Applications 9, no. 5 (2018): 158–62. http://dx.doi.org/10.18178/ijcea.2018.9.5.718.

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3

Yalçin, N., and V. Sevinç. "Studies on silica obtained from rice husk." Ceramics International 27, no. 2 (2001): 219–24. http://dx.doi.org/10.1016/s0272-8842(00)00068-7.

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4

Muzni, Nur Haslinda Mohamed, Noorina Hidayu Jamil, Faizul Che Pa, and Wan Mohd Arif. "Effect of Acid Leaching on Different State of Rice Husk." Materials Science Forum 1010 (September 2020): 532–37. http://dx.doi.org/10.4028/www.scientific.net/msf.1010.532.

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Rice husks (RH) are agricultural wastes available abundantly in rice producing country. A by-product obtained from combustion of rice husk is rice husk ash (RHA) which is rich in silica (SiO2) contents. This paper focused on the effect of acid leaching treatment on rice husk to produce high-purity silica. There are 4 different states of conditions involved; raw rice husk (RRH), treated rice husk (TRH), rice husk ash (RHA), and treated rice husk ash (TRHA). Citric acid; C6H8O7 was used as a leaching agent. TRH and TRHA was leached to see whether treated rice husk before combustion (TRH) or trea

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5

Santos, Felipe Antunes, Claudinei dos Santos, Durval Rodrigues Júnior, et al. "Lithium Disilicate Glass-Ceramic Obtained from Rice Husk-Based Silica." Advances in Science and Technology 63 (October 2010): 414–19. http://dx.doi.org/10.4028/www.scientific.net/ast.63.414.

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In this work lithium disilicate glass-ceramic and glasses based on the Li2O-SiO2 system have been investigated by replacing the high-purity SiO2 starting powder by silica obtained from rice husk. Glasses were developed at the stoichiometric composition of 66%.molSiO2:33%.molLiO2 using SiO2 obtained by thermochemical treatment of rice husk. The influence of rice husk-SiO2 on phase formation, microstructure, hardness and fracture toughness was determined and discussed. Investigations were carried out by means of differential thermal analysis, X-ray fluorescence, X-ray diffractometry and scanning

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6

Jaman, Anwar, Nuryono Nuryono, and Suyanta Suyanta. "The Properties of White Mineral Trioxide Aggregate (WMTA) Made of Rice Husk Ash Silica and Limestone Calcium Carbonate and the Effect of Silica Particles Addition." Key Engineering Materials 884 (May 2021): 274–81. http://dx.doi.org/10.4028/www.scientific.net/kem.884.274.

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White Mineral Trioxide Aggregate (WMTA) using a combination of precursors consisting entirely of SiO2, CaCO3, Al2O3, and Bi2O3 which are widely used as cement for tooth restoration has been prepared. SiO2 was extracted from rice husk ash containing about 85-95% of silica found in rice husk ash from complete combustion. On the other hand, rice husks, in general, are still regarded as agricultural waste resulting from the rice milling process. In the rice milling process, around 20-30% of rice is obtained, and around 14-20% of ash is produced from burning rice husks. CaCO3 can be synthesized fro

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7

Seangyen, Wichudaporn, Paweena Prapainainar, Pongdhorn Sae-Oui, Surapich Loykulnant, and Peerapan Dittanet. "Natural Rubber Reinforced with Silica Nanoparticles Extracted from Jasmine and Riceberry Rice Husk Ashes." Materials Science Forum 936 (October 2018): 31–36. http://dx.doi.org/10.4028/www.scientific.net/msf.936.31.

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Silica nanoparticles were synthesized by rice husk ash (RHA) produced from jasmine rice husk and riceberry rice husk via sol-gel method for the use as reinforcing fillers in natural rubber (NR). The obtained silica nanoparticles are spherical in shape and the particle sizes were observed to be in the 10-20 nm range with uniformly size distribution. The surface of silica nanoparticles was treated with a silane coupling agent confirmed by FTIR. The treated silica nanoparticles were then incorporated into NR and vulcanized with electron beam irradiation. The rubber nanocomposites with silica nano

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8

Niculescu, Violeta-Carolina, and Maria Raboaca. "Efficient Rice-Husk-Derived Silica Nanocatalysts for Organic Dye Removal from Water." Catalysts 11, no. 7 (2021): 815. http://dx.doi.org/10.3390/catal11070815.

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Rice is the second most extensively consumed food ingredient, and its by-products in the paddy field include rice husk and straw. Rice husk ash, resulting from rice husk burning, is considered an environment menace, inducing negative effects on the area in which it is disposed of. In this study, rice husk was applied as a silicate source to obtain mesoporous silica material. Characterization techniques confirmed the well-ordered mesophase and resemblance of mesoporous silica resulting from rice husk ash with one obtained from conventional silica sources. The mesoporous silica material was furt

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9

Santos, Felipe Antunes, Claudinei dos Santos, Durval Rodrigues Júnior, Daltro Garcia Pinatti, Erika Davim, and Maria Helena F. V. Fernandes. "Lithium Disilicate Bioceramic Obtained from Alternative Silica Source, the Rice Husk." Materials Science Forum 727-728 (August 2012): 1158–63. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1158.

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The crystallization process of lithium disilicate glass-ceramic with SiO2 from rice husk silica replacing the high-purity SiO2 starting powder has been investigated in this work. Glasses were developed at the stoichiometric composition of 66%.molSiO2:33%.molLiO2 using commercial SiO2 and the one obtained by thermochemical treatment of rice husk. The influence of rice husk-SiO2 on crystallization process to different granulometry, microstructure and kinetic behavior was determined and discussed. Investigations were carried out by means of differential thermal analysis (DTA), X-ray fluorescence

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10

Lumban Raja, Saur. "Improving Porosity of Glycerol-plated Silica from Rice Husk Silica." Journal of Chemical Natural Resources 1, no. 2 (2019): 88–97. http://dx.doi.org/10.32734/jcnar.v1i2.1257.

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Research on the increasing pore size of rice husk silica with the addition of glycerol as a template has been done. Sodium silicate obtained from rice husk can be extracted with sodium hydroxide. The resulting sodium silicate is then added to the glycerol and followed by precipitation using hydrochloric acid to obtain silica. The obtained results were calcined at 600°C. The resulting material analised by FT-IR, XRD and BET. The FT-IR data shows an asymmetric Si-O-Si absorption peak at wave number 1067 cm-1 and a symmetrical Si-O-Si peak absorption at 806.77 cm-1 wave number. Diffractogram XRD

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11

Arefieva, Olga D., Ludmila A. Zemnukhova, and Anastasia A. Kovshun. "Amorphous Silica Produced from Pulping of Rice Husk." Advanced Materials Research 1092-1093 (March 2015): 1037–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1092-1093.1037.

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This paper covers the results of the research devoted to characterize of silica dioxide samples obtained from alkaline hydrolysate or black liquor produced from pulping of rice husk. The paper discusses amorphous silica of various quality. Silica samples are characterized: crude (air-dried); burnt (no preliminary water treatment); washed in distilled water; washed in distilled water and burnt.

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12

Rianda, Zulhadjri, and Syukri Arief. "SINTESIS DAN KARAKTERISASI WOLLASTONIT BERBAHAN DASAR ALAMI DENGAN METODE HIDROTERMAL." Jurnal Riset Kimia 8, no. 2 (2015): 154. http://dx.doi.org/10.25077/jrk.v8i2.233.

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Indonesia is one of huge paddy producing countries so that it also produces rice husk in a great number. Rice husks contain high silica. Which is good in silica compounds synthesis such as Wollastonit (CaSiO3). Nowadays Wollastonit has attracted great intension doe to its ability to increase mechanical properties of a material. In this work, rice husk was taken from Sariak Laweh, Lima Puluh Kota district and CaO was taken from Halaban, in the same district. Analysis with XRF show that SiO2 and CaO content of both samples were high enough, 97% and 98% which indicated their good potential as sil

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13

Huang, Sheng, Shan Jing, Jinfu Wang, Zhanwen Wang, and Yong Jin. "Silica white obtained from rice husk in a fluidized bed." Powder Technology 117, no. 3 (2001): 232–38. http://dx.doi.org/10.1016/s0032-5910(00)00372-7.

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14

Bangwar, D. K., A. Saand, M. A. Keerio, M. A. Soomro, and N. Bhatti. "Development of an Amorphous Silica from Rice Husk Waste." Engineering, Technology & Applied Science Research 7, no. 6 (2017): 2184–88. http://dx.doi.org/10.48084/etasr.1534.

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This article presents a study on the development of amorphous silica from Rice Husk (RH) waste. For ascertaining the optimum proportion of temperature and burning duration required for the development of an amorphous silica from RH waste, different Rice Husk Ash (RHA) samples, i.e. RHA (500oC-1.5hr), RHA (500oC-2hr), RHA (600oC-1.5hr), RHA (600oC-2hr), RHA (700oC-1.5hr), RHA (700oC-2hr), RHA (800oC-1.5hr), RHA (800oC-2) and RHA (900oC-1hr) were extracted by burning the husk at different temperatures and durations. Energy Dispersive Spectrometry (EDS) analysis was carried out for ascertaining t

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15

Purwaningsih, Hariyati, Slamet Raharjo, Vania Mitha Pratiwi, Diah Susanti, and Agung Purniawan. "Porous Silica Nanomaterial Derived from Organic Waste Rice Husk as Highly Potential Drug Delivery Material." Materials Science Forum 964 (July 2019): 88–96. http://dx.doi.org/10.4028/www.scientific.net/msf.964.88.

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Rice became the main product of agriculture in agrarian countries including Indonesia. Rice husk is a waste of rice as one of the largest silica producers. Silica from rice husks can be used as a source of silica in the manufacture of sodium silicate as an alternative to the formation of mesoporous silica at a low price. In this research, the characterization of mesoporous silica nanoparticle (MSN) MCM-41 from rice husk (rice husk) with sol-gel method followed by hydrothermal treatment. Silica extraction was performed by titrating sodium silica using HCl method until the gel was formed. The me

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16

Nuruddin, Ahmad, Brian Yuliarto, Adhitya Gandaryus Saputro, Badruzaman Badruzaman, and Aditianto Ramelan. "Preparation of Polycrystalline Silicon from Rice Husk by Thermal Decomposition and Aluminothermic Reduction." Molekul 15, no. 1 (2020): 26. http://dx.doi.org/10.20884/1.jm.2020.15.1.568.

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Polycrystalline silicon was extracted from rice husk by thermal decomposition and aluminothermic methods. Rice husk was thermally decomposed under various heat treatments and acid purifications. High purity silica of 99.81% was obtained by subsequent rice husk washing, pressure cooking in mixed chloride acid peroxide solution, and burning at 500oC for one hour. Aluminothermic reduction of silica was conducted at various calcination temperatures. It is found that 78.6% of silica was converted to silicon for calcination temperature of 800oC. Leaching the reduction product with strong hydrochlori

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17

Bakri. "SIFAT KIMIA DAN FISIK BAHAN UTAMA CONBLOCK RINGAN YANG MENGGUNAKAN AGREGAT SEKAM PADI." PERENNIAL 8, no. 2 (2012): 62. http://dx.doi.org/10.24259/perennial.v8i2.216.

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This research aimed to assess the properties of main substances used to produce lightweight composite cement using rice husk as aggregate. Main substances used in this research consisted of Portland cement tipe I, lime, rice husk and rice husk ash. Portland cement tipe I, lime and rice husk obtained from local producers in Makassar, while rice husk ash obtained by burning rice husk conventionally in kiln drum and subsequently followed by burning in furnace of 1400 Barnsted Thermolyne Type at temperature 600 oC for 2 hours. Chemical Content of the substances analyzed by adopted the analysis pro

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18

Della, Viviana Possamai, Ingeborg Kühn, and Dachamir Hotza. "Processing and Characterization of Active Silica Obtained from Rice Husk Ash." Materials Science Forum 416-418 (February 2003): 531–36. http://dx.doi.org/10.4028/www.scientific.net/msf.416-418.531.

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19

Tipsotnaiyana, Nitus, Lerpong Jarupan, and C. Pechyen. "Synthesized Silica Powder from Rice Husk for Printing Raw Materials Application." Advanced Materials Research 506 (April 2012): 218–21. http://dx.doi.org/10.4028/www.scientific.net/amr.506.218.

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Rice husk is a form of agricultural biomass that provides an abundant silicon dioxides source. This study use rice husk ash as a material to prepare silica. Silica powder has been synthesized by the refluxing of rice husk ash with HCl 1,2 and 3 M at different time (60 and 120 min.) and subsequently adjusting the pH using 1 M. NaOH. The silicon dioxide extraction yield reached 85% and was effect by concentration of HCl solution and reaction time. The structure of the obtained silica powder were characterized by X-Ray Fluorescence (XRF), X-Ray diffraction (XRD), CIE L*a*b* (Visible spectrophotom

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20

Kurmanbayeva, I., A. Mentbayeva, A. Sadykova, A. Adi, Z. Mansurov, and Z. Bakenov. "Silica from Kazakhstan Rice Husk as an Anode Material for LIBs." Eurasian Chemico-Technological Journal, no. 1 (February 20, 2019): 75. http://dx.doi.org/10.18321/ectj794.

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This paper reports the synthesis of the silica (SiO2) from Kyzylorda rice husk (RH) and investigation of its electrochemical behaviour as an anode material for the lithium-ion battery. Rice husk, considered as agricultural waste material, contains a substantial amount of amorphous silica, carbon, and minor other mineral composition, which have potential industrial and scientific applications. Due to the high theoretical capacity of silicon (4200 mAh g-1) and silicon dioxide (1965 mAh g-1), Si-containing compounds are considered as a promising candidate for a new generation of anode materials f

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21

Asmi, Dwi, Anne Zulfia Syahrial, and Muhammad Badaruddin. "Improvement High Purity Biogenic Amorphous SiO₂ Derived from Rice Husk Ash: Synthesis and its Characterization." Materials Science Forum 1029 (May 2021): 175–80. http://dx.doi.org/10.4028/www.scientific.net/msf.1029.175.

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In this work a simple process for the production of high purity biogenic amorphous SiO2 derived from rice husk ash have been studied. Rice husk ash obtained from heat treatment of rice husk and citric acid leaching of rice husk at 700 o C for 6 h. Improvement of purity SiO2 from rice husk ash conducted by precipitation technique. The precipitated SiO2 particles obtained were characterized by x-ray fluorescence (XRF) analysis, Fourier transform infrared (FTIR) spectroscopy, and x-ray diffraction analysis (XRD). The XRF result shows that the high purity of biogenic amorphous SiO2 obtained is 99.

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22

Nguyen, Duy Hung, Liubov A. Zenitova, Quang Dien Le, and Do Tien Thinh Bui. "Use of burn rice residues for production of nanosilica." Butlerov Communications 57, no. 3 (2019): 155–61. http://dx.doi.org/10.37952/roi-jbc-01/19-57-3-155.

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The current uilization of rice straw and husk as a solid fuel or burning out in the open air creates a large amount of ash, which is still inefficiently used and causes environmental problems in countries that grow rice. Meanwhile, valuable organic silica dioxide can be obtained from these wastes for wide applications. Recently, the production of organic silica dioxide from various sources has attracted much attention in the world. This article presents the results of a study on the preparation of nanosilica from rice straw and rice husk of Vietnamese by a two-stage process. In the first stage

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23

Dang, Nhung Thi Thuy, Trinh Thi Ai Nguyen, Tuan Dinh Phan, Hoa Tran, Phu Van Dang, and Hien Quoc Nguyen. "Synthesis of silica nanoparticles from rice husk ash." Science and Technology Development Journal 20, K7 (2018): 50–54. http://dx.doi.org/10.32508/stdj.v20ik7.1211.

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Silica nanoparticles (SiO2 NPs) were synthesized from rice husk ash (RHA) by chemical treatment and calcination. The size of SiO2 NPs evaluated by transmission electron microscope (TEM) was of 20 - 50 nm and the size distribution of SiO2 NPs measured by dynamic laser scattering (DLS) was of Gaussian mode. The X-ray diffraction (XRD) pattern with only one peak at 2θ ~ 220 confirmed the amorphous phase of SiO2 NPs. The Fourier transform infrared (FTIR) and energydispersive X-ray (EDX) spectra were also used to evaluate the functional groups and the purity of SiO2 NPs. The SiO2 NPs powder with hi

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Hassan, Nur Syakilla, Khairiah Haji Badri, and Li Shen Lim. "Silica Extraction from Rice Husk by Warm Water Pretreatment." Advanced Materials Research 1087 (February 2015): 309–15. http://dx.doi.org/10.4028/www.scientific.net/amr.1087.309.

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Rice husk (RH) has high content of silica. In this study, the extraction of silica from rice husk while maintaining the organics was carried out by warm water pre-treatment followed by alkaline hydrolysis. RH powder was treated with water at 50oC and 100oC prior to treatment with 1 M of sodium hydroxide (NaOH) aqueous solution at 50oC. The filtrate from the alkaline hydrolysis was then further reacted with 1 M of hydrochloric acid (HCl) for silica extraction. The samples obtained after each stage of the treatments were carefully characterized and their chemical compositions were determined. Th

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Gutiérrez-Valtierra, Moises, Carmen Salazar-Hernández, Juan Manuel Mendoza-Miranda, et al. "Cr(III) removal from tannery effluents using silica obtained from rice husk and modified silica." DESALINATION AND WATER TREATMENT 158 (2019): 152–63. http://dx.doi.org/10.5004/dwt.2019.24184.

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26

Benjamin Iyenagbe, Ugheoke, and Othman Mamat. "Hydro Thermo-Baric Processing and Properties of Nano Silica from Rice Husk." Applied Mechanics and Materials 152-154 (January 2012): 177–82. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.177.

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Several processing methods have been used to obtain silica from rice husk with a persistent problem of lack of scalability from laboratory scale to levels of production necessary for commercial or industrial applications, at low cost. To address this draw-back, a novel method- hydro thermo-baric process, was developed and used to process high purity silica from rice husk. Since the suitability of rice husk silica in a given application is dependent on the nature of its structure and morphology and the two parameters are affected by the processing methods used in obtaining the silica, this pape

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Ismail, N. A. A., M. Azham Azmi, Sufizar Ahmad, and Hariati Taib. "Effect of Rice Husk Firing Temperature on Synthesis of Silica (SiO₂)." Advanced Materials Research 1087 (February 2015): 470–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1087.470.

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This paper presents the synthesis of silica (SiO2) from rice husk at different firing temperatures. Due to the environmental awareness and to reduce air pollution, agricultural wastes specifically rice husk is used to produce SiO2. Silica was prepared by washing with clean water without any chemical treatment. The rice husk was fired at 700, 800, 900, 1000, 1100 and 1200°C. In order to determine the effect of firing rice husk at different temperature, X-ray Diffraction (XRD) analyses were conducted. Crystalline silica were obtained at 1100°C and 1200°C firing temperature. At 900°C and 1000°C f

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Raut, Bimal Kumar, and Khim Prasad Panthi. "Extraction of Silica Nanoparticles from Rice Husk Ash (RHA) and Study of Its Application in Making Composites." Journal of Nepal Chemical Society 40 (December 31, 2019): 67–72. http://dx.doi.org/10.3126/jncs.v40i0.27285.

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Nanotechnology is the most emerging field in the area of different scientific research. Various methods of synthesis of nanoparticles are available. The wet chemical synthesis method is applicable in the extraction of silica nanoparticles from Rice Husk Ash (RHA). Rice husk is a form of waste product from the rice milling industries which is produced in an abundance amount in and around the country. Rice husk which is generally left on the field as a waste contains 60% silica content and can be economically viable raw materials for the extraction of silica [1-2]. Initially, Rice husk was burnt

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Shamsudin, Roslinda, Hamisah Ismail та Muhammad Azmi Abdul Hamid. "The Suitability of Rice Straw Ash as a Precursor for Synthesizing β-Wollastonite". Materials Science Forum 846 (березень 2016): 216–22. http://dx.doi.org/10.4028/www.scientific.net/msf.846.216.

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In this study, β-wollastonite is produced from a reaction between silica (SiO2) and calcium oxide (CaO) with the SiO2/Cao ratio of 55:45. Rice straw ash is chosen as the source for SiO2 instead of rice husk ash because the straw can yield up to 85% of silica even though this percentage is lower than those silica yielded from rice husk ash. It is found that period of autoclaving and sintering play an important role in producing the wollastonite. As shown in the XRD results, a single phase β-wollastonite is obtained after 8 h of autoclaving and 3 h of sintering at 950 °C. The produced β-wollasto

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Phoohinkong, Weerachon, and Udomsak Kitthawee. "Low-Cost and Fast Production of Nano-Silica from Rice Husk Ash." Advanced Materials Research 979 (June 2014): 216–19. http://dx.doi.org/10.4028/www.scientific.net/amr.979.216.

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Silica with nanostructure are the high quality silica that are used in many industry areas. The applications of silica nanostructure frequently depend on physical properties such as morphology and size of structure. Rice husk ash is the waste from biomass power plants and is a high quality, raw material as a silica source. The conventional methods for synthesis of nanosilica from rice husk ash are energy consumption or time consumption. The objective of this work was to investigate the synthesized of nanosilica from rice husk ash via sodium silicate solution. nanosilica particles were obtained

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Ayomanor, B. O., and Karen Vernon-Parry. "Potential Synthesis of Solar-Grade Silicon from Rice Husk Ash." Solid State Phenomena 242 (October 2015): 41–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.242.41.

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Rice husk, an agricultural waste product obtained in large quantities in many countries including Nigeria, is very rich in siliceous materials. It has been known for several decades that, with careful processing, rice husk can be a source of metallurgical grade silicon [1]. The question remains as to whether rice husk ash (RHA) can be purified by a cost-effective, low technology route to produce solar-grade silicon suitable for use in photovoltaic devices. In Nigeria this would have the benefit of transforming large volumes (> 600,000 tonnes per annum) of agricultural waste into a partial s

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Khan, MAA, MS Saha, S. Sultana, and AN Ahmed. "Preparation and Characterization of White Carbon Black From Rice Husk." Journal of Environmental Science and Natural Resources 9, no. 2 (2017): 1–7. http://dx.doi.org/10.3329/jesnr.v9i2.32135.

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Generally white carbon black in a form of silica is used instead of carbon black as reinforcing filler for rubber compounding. In the present research white carbon black was prepared from rice husks in cost effective method with direct incineration of acid leaching rice husk. The physico-chemical properties of rice husk and the product of white carbon black obtained from rice husk were investigated by Thermogravimetry, Particle size analyzer, Scanning electron microscope; Fourier transformed infrared radiation (FTIR), X-ray fluorescence and X-ray difractometry analyses. It was found that the d

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Chun, Jinyoung, and Jin Hyung Lee. "Recent Progress on the Development of Engineered Silica Particles Derived from Rice Husk." Sustainability 12, no. 24 (2020): 10683. http://dx.doi.org/10.3390/su122410683.

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The development of engineered silica particles by using low-cost renewable or waste resources is a key example of sustainability. Rice husks have emerged as a renewable resource for the production of engineered silica particles as well as bioenergy. This review presents a state-of-the-art process for the development of engineered silica particles from rice husks via a bottom-up process. The first part of this review focuses on the extraction of Si from rice husks through combustion and chemical reactions. The second part details the technologies for synthesizing engineered silica particles usi

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Nasresfahani, Mohamad Reza, and Morteza Shamanian. "Characterization of Al1100-RHA composite developed by accumulative roll bonding." Journal of Composite Materials 53, no. 15 (2018): 2047–52. http://dx.doi.org/10.1177/0021998318817938.

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A metal–matrix composite was developed by eco-friendly accumulative roll bonding process and agricultural wastes. Amorphous silica particles were obtained by heating rice husk at 600℃ and then ball milling. Amorphous silica particles as a reinforcement were embedded in a matrix of aluminum 1100. Composites with various amounts (1%, 2%, 3%, 4%, 5%, 6%, and 7%, mass fraction) of rice husk ash particles were developed. The produced aluminum–rice husk ash composites were evaluated for structural changes and mechanical properties. The scanning electron micrographs showed a uniform distribution of r

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A’yuni, D. Q., A. Subagio, H. Hadiyanto, A. C. Kumoro, and M. Djaeni. "Microstructure silica leached by NaOH from semi-burned rice husk ash for moisture adsorbent." Archives of Materials Science and Engineering 1, no. 108 (2021): 5–15. http://dx.doi.org/10.5604/01.3001.0015.0248.

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Purpose: This work aims to study the water vapor adsorption property of fine silica particles from semi-burned rice husk ash. The semi-burned rice husk ash is selected as the raw material since it contains high silica and is easily found as a by-product of pottery furnace combustion. Design/methodology/approach: The silica adsorbent from semi-burned rice husk ash was prepared through a sol-gel method using various NaOH concentrations. In doing so, the different pH precipitation was also observed. Here, the fine silica powder was obtained by pulverizing dry sol-gel. The product characterization

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Ruksudjarit, A., and Gobwute Rujijanagul. "Synthesis of SiO₂ Nanopowder from Rice Husk Ash." Advanced Materials Research 55-57 (August 2008): 649–52. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.649.

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In the present work, we demonstrate a method to synthesis SiO2 nanopowder from rice husk ash by using a vibro-milling followed by a heat treatment technique. Rice husk ash was milled by vibro-milling for 4 h to obtain nanopowder. In order to eliminate carbonaceous material, the nanopowder was heat at 1000°C for 3 h. Characteristic of the powder was then investigated by XRF, XRD, and SEM techniques. The silica nanopowder with 95% purity was obtained after the heat-treatment. The result indicated that the present method is a beneficial process to produce the silica nanopowders of low cost and hi

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Madrid, Rosário, Fernanda Margarido, and Carlos A. Nogueira. "Valorisation of Rice Husk by Chemical and Thermal Treatments." Materials Science Forum 730-732 (November 2012): 659–64. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.659.

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In the industrial production of rice, large quantities of rice husk are generated constituting a residue with costs for the companies, which must be appropriately managed. The high grade of silica in the rice husk opens a possibility for its valorisation, through the production of amorphous silica with high porosity and potential application as ligand in construction materials, as catalyst support, as metals adsorbent, among others. In this research work a process was developed for the production of silica with amorphous properties from rice husk waste, and the products formed were characteris

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Asgharnia, Hosseinali, Hamidreza Nasehinia, Roohollah Rostami, Marziah Rahmani, and Seyed Mahmoud Mehdinia. "Phenol removal from aqueous solution using silica and activated carbon derived from rice husk." Water Practice and Technology 14, no. 4 (2019): 897–907. http://dx.doi.org/10.2166/wpt.2019.072.

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Abstract Phenol and its derivatives are organic pollutants with dangerous effects, such as poisoning, carcinogenicity, mutagenicity, and teratogenicity in humans and other organisms. In this study, the removal of phenol from aqueous solution by adsorption on silica and activated carbon of rice husk was investigated. In this regard, the effects of initial concentration of phenol, pH, dosage of the adsorbents, and contact time on the adsorption of phenol were investigated. The results showed that the maximum removal of phenol by rice husk silica (RHS) and rice husk activated carbon (RHAC) in the

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Kayal, Nijhuma, and Nahar Singh. "Synthesis, characterization of Silica Obtained from Rice Husk and Determination its Silica Content by Modified Volumetric Method." Eurasian Chemico-Technological Journal 11, no. 2 (2016): 93. http://dx.doi.org/10.18321/ectj301.

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<p>The objective of the work was to develop pure silica with high surface area from rice husk by chemical and heat treatment. The silica samples were characterized in terms of chemical composition, particle size distribution, morphology and surface area. The amount of silica was determined by a modified volumetric method. The trace impurities in silica were quantitatively determined by inductive coupled plasma atomic emission spectroscopy (ICP-AES). A 99% silica powder with surface area 282 m<sup>2</sup>/gm could be produced by chemical and heat treatment at 1000 ºC for 2 h.&

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Dewi, Qori Sari, Simon Sembiring, Syafriadi Syafriadi, and Ediman Ginting. "Karakteristik Struktur Mikro Komposit Aspal Silika Sekam Padi Dengan Variasi Komposisi (20%:80%, 15%:85% dan 10%:90%)." Journal of Energy, Material, and Instrumentation Technology 1, no. 2 (2020): 58–63. http://dx.doi.org/10.23960/jemit.v1i2.23.

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Synthesis and characterization of rice husk and asphalt silica composites with various compositions have been carried out 20%: 80%, 15%: 85% and 10%: 90%. Silica synthesis from rice husk wa carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH and HNO3. This research was conducted of variations in the composition the effect of silica and asphalt on the microstructure and structure of the sample. The characterization results of Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM-EDS) on the surface of silica asph

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Pijarn, Nuchanaporn, and Pichit Galajak. "New Insight Technique for Synthesis of Silica Gel from Rice Husk Ash by Using Microwave Radiation." Advanced Materials Research 1025-1026 (September 2014): 574–79. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.574.

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Silica gel is the chemical substance that has many good advantages such as absorbed moisture, porosity, small diameter, high surface area, and lightweight. It was synthesized by using rice husk ash via sol – gel heating in the microwave technique. The objectives in this work compose of synthesis silica gel by using the microwave technique before characterizatization. This raw material was archived from rice husk ash, obtained from agricultural waste. The silica gel, synthesized by conventional method (CVM) and commercial silica gel (COM), was also studied for comparison purposes. The results s

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Liu, Xue Qing, and Ji Yan Liu. "Mechanical Properties and Morphologies of Rice Husk Silica/Epoxy Nanocomposites." Advanced Materials Research 236-238 (May 2011): 220–24. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.220.

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Amorphous rice husk silica with purity of 99.3% and the specific surface area value of 212 mP2P/g was obtained by burning the dilute HCl treated rice husk at 600°C. After being modified with γ-glycidyloxipropyltrimethoxysilane (KH-550), silica particles with size ranging from 30 to 50 nm were obtained and subsequently used as filler to prepare epoxy-based nanocomposites with 0, 1, 3, 5 and 10 wt% silica content. The mechanical properties of the nanocomposites were characterized in terms of tensile and flexural test. The morphologies of fracture surfaces of nanocomposites were investigated by s

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Prasetyoko, Didik, Zainab Ramli, Salasiah Endud, Halimaton Hamdan, and Bogdan Sulikowski. "SYNTHESIS OF ZEOLITE BETA DIRECTLY FROM RICE HUSK ASH: EFFECT OF REACTION COMPOSITION ON CRYSTALLINITY OF ZEOLITE BETA." Indonesian Journal of Chemistry 6, no. 1 (2010): 11–15. http://dx.doi.org/10.22146/ijc.21765.

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White rice husk ash obtained from complete uncontrolled burning of rice husk contains more than 94% silica. The ash, which consists of crystalline silica of the type tridymite and a-crystobalite, was used directly as a source of silica in the synthesis of zeolite beta. The mole oxide ratio of the initial gel of 1.25-8Na2O: 10-120SiO2: Al2O3: 1-20TEA2O: 150-1000H2O was prepared and heated at 150°C in a static condition for 6 d. The solid phases formed were monitored by XRD technique. Influence of reaction mixture ratio in the initial gel to the crystalline products formed was studied. Results s

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Solihudin, Solihudin, Atiek Rostika Noviyanti, and Iman Rahayu. "Pengaruh Ukuran Partikel Arang Sekam Padi Dan Waktu Refluks terhadap Kadar Abudan Daya Serap Karbon Sekam Padi." Jurnal Natur Indonesia 17, no. 1 (2017): 33. http://dx.doi.org/10.31258/jnat.17.1.33-41.

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The highest content in rice husk is ash with its main component of silica. Silica in ash causes the low adsorption capacity. Activated carbon from rice husk can be obtained by lowering the ash content. The aim of this study is determine the effect of particle size of charcoal and reflux time the ash content using a solution of potassium carbonate. The activation of rice husk char was carried out by using reflux methods with a potassium carbonate solution. The resulted carbon was washed using hydrochloric acid tested using iodine and methylene blue to examine of its adsorbance. The particle siz

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Nandi, K. C., H. N. Acharya, and D. Mukherjee. "X-ray radial distribution function analysis of amorphous silica obtained from rice husk." Journal of Materials Science Letters 11, no. 1 (1992): 38–40. http://dx.doi.org/10.1007/bf00720775.

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Santos, F. A., M. H. F. V. Fernandes, E. Davim, D. G. Pinatti, D. R. R. Lazar, and C. Santos. "Crystallization process of a biomaterial, the lithium disilicate, obtained from rice husk silica." IOP Conference Series: Materials Science and Engineering 47 (December 13, 2013): 012003. http://dx.doi.org/10.1088/1757-899x/47/1/012003.

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Ludueña, Leandro, Diana Fasce, Vera A. Alvarez, and Pablo M. Stefani. "Nanocellulose from rice husk following alkaline treatment to remove silica." BioResources 6, no. 2 (2011): 1440–53. http://dx.doi.org/10.15376/biores.6.2.1440-1453.

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The present work deals with the use of multiple-step procedures to obtain valuable sub-products, including nanocellulose, from rice husk. Each sub-product was characterized after every step by analyzing the chemical composition (mainly based on thermogravimetric analysis, Fourier transformed infrared spectra, and X-ray diffraction) and morphology (using visual observations and scanning electron microscopy). The results clearly showed that the selected procedure gave the possibility to separate silica in the first step and then to purify the resultant material, leading to nanocellulose producti

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Burana, T., Nitus Tipsotnaiyana, and P. Kajondecha. "Improve the Quality of the Paper with a Surface Coating of Silica in Rice Husk." Advanced Materials Research 505 (April 2012): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.505.3.

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Rice husk is a form of agricultural biomass that provides an abundant silicon dioxides source. This study used rice husk ash as a material to prepare paper coating. Silica powder has been synthesized by the refluxing of rice husk ash with HCl 1,2 and 3 M at different time (60 and 120 min.) The silicon dioxide extraction yield reached 85% and was effect by concentration of HCl solution and reaction time. The structure of the obtained silica powder were characterized by X-Ray Fluorescence (XRF), Particle size distribution (PSD), X-Ray diffraction (XRD), CIE L*a*b* (Visible spectrophotometer) and

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Kongmanklang, Chaiwat, and Kunwadee Rangsriwatananon. "Hydrothermal Synthesis of High Crystalline Silicalite from Rice Husk Ash." Journal of Spectroscopy 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/696513.

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The objective of this research work was to evaluate the hydrothermal synthesis of silicalite with high crystallinity within a small particle size. The current study focused on investigating the effects of silica sources such as rice husk ash (RHA) and silica gel (SG), crystallization time, and ratios of NaOH/SiO2, H2O/NaOH, and SiO2/TPABr. The crystallinity, particle size, and morphology were characterized by FT-IR, XRD, particle size analyser, and SEM. The conclusion of the main findings indicated that the XRD patterns of these samples clearly showed a pure phase of MFI structure correspondin

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Park, Ji Yeon, Yang Mo Gu, Seon Young Park, et al. "Two-Stage Continuous Process for the Extraction of Silica from Rice Husk Using Attrition Ball Milling and Alkaline Leaching Methods." Sustainability 13, no. 13 (2021): 7350. http://dx.doi.org/10.3390/su13137350.

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A two-stage continuous process was developed for improved silica extraction from rice husk. The two-stage continuous process consists of attrition ball milling and alkaline leaching methods. To find the optimum conditions for the continuous process, the effects of alkaline leaching parameters, such as the alkaline solution type and reaction conditions, on the silica extraction yield were investigated in a batch process. The use of NaOH showed a slightly higher silica yield than KOH. The optimum reaction conditions were found to be 0.2 M, 80 °C, 3 h, and 6% (w/v) for the reaction concentration,

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