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Journal articles on the topic 'Graphite oxide nanoparticles'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Mochizuki, Tomofumi, Yamato Hayashi, Jun Fukushima, and Hirotsugu Takizawa. "Synthesis and Characterization of Ag/Graphene Nanocomposites by Solid-Liquid Sonochemical Reactions." Materials Science Forum 804 (October 2014): 119–22. http://dx.doi.org/10.4028/www.scientific.net/msf.804.119.

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In this study, Graphite Oxide (GO) and Ag/Graphene nanocomposites were synthesized by solid-liquid sonochemical reactions easily and briefly. GO was synthesized by means of Hummers method using sonication or stirring. From XRD patterns and FT-IR spectra, chemical and physical effects of ultrasound promoted the oxidation of Graphite. Ag/graphene nanocomposites were synthesized from GO and silver oxide by sonication. UV-vis spectra showed the peaks of Graphene oxide and Ag nanoparticle plasmon resonance absorption. EDX images and electron diffraction patterns confirmed Ag nanoparticles were deco

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2

Kane, Aichata, Ivaylo Hinkov, Ovidiu Brinza, et al. "One-Step Synthesis of Graphene, Copper and Zinc Oxide Graphene Hybrids via Arc Discharge: Experiments and Modeling." Coatings 10, no. 4 (2020): 308. http://dx.doi.org/10.3390/coatings10040308.

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In this paper, we report on a modified arc process to synthetize graphene, copper and zinc oxide graphene hybrids. The anode was made of pure graphite or graphite mixed with metals or metal oxides. After applying a controlled direct current, plasma is created in the interelectrode region and the anode is consumed by eroding. Continuous and abundant flux of small carbon, zinc or copper species, issued from the anode at a relatively high temperature, flows through the plasma and condenses in the vicinity of a water-cooled cathode leading to few-layered graphene sheets and highly ordered carbon s

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3

Zou, Wen Bin, Jun Wu Zhu, and Xin Wang. "Preparation and Characterization of Graphene Oxide-ZnO Nanocomposites." Materials Science Forum 688 (June 2011): 228–32. http://dx.doi.org/10.4028/www.scientific.net/msf.688.228.

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A composite of graphene oxide supported by ZnO nanoparticles (GO-ZnO nanocomposites) was prepared through a simple chemical approach. The lamellar graphite oxide sheets in this composite were exfoliated and decorated randomly by ZnO nanoparticles with a mean size of 20 nm. In addition, the photocatalytic experiments exhibit that the GO-ZnO nanocomposites have a good photocatalytic activity on degradation of methylene blue under UV light irradiation. This method provides a facile and straightforward approach to deposit ZnO nanoparticles onto the graphene oxide sheets and may be readily extended

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4

Kelani, Hadi, Shelby Weatherbee, Stephen Blama, and Mary Sajini Devadas. "Synthesis and Characterization of 2D-Graphene Oxide-Metal Hybrid Systems with Increased Solubility." MRS Advances 4, no. 38-39 (2019): 2119–26. http://dx.doi.org/10.1557/adv.2019.259.

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ABSTRACTGraphene oxide serves as a precursor to various technologies, which include batteries, biosensors, solar cells, and supercapacitors. Gold nanoparticles exhibit excellent electrochemical and photophysical properties, allowing for electronic absorption and the ability to absorb light energy at the plasmonic wavelength. Palladium nanoparticles are highly sensitive and functional in room temperature, making it an ideal metal for catalytic applications. We report the synthesis of functional graphene oxide from graphite flakes followed by the insertion of gold and palladium nanoparticles thr

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Jiang, Yan Li, Mei Tian, Ying Hui Yu, Jia Yao Liu, and Shuang Liu. "Preparation and Property of Reduced Graphene for Hummers." Key Engineering Materials 591 (November 2013): 301–4. http://dx.doi.org/10.4028/www.scientific.net/kem.591.301.

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Graphene material has ideal lattice structure and unique electrical, optical and other properties. In the electronics, composite materials, and other fields it has a broad application prospect. In this paper, using the Hummers method, to prepare oxidized graphite and graphene , to optimize the conditions of the preparation of graphite oxide. With two kinds of reductors, glucose and hydrazine hydrate, reduction graphite oxide, and dropped silver ions in the process of reduction. Using XRD, SEM and Raman spectra to character and analyze the products. The result showed that the graphite and silve

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Zaikovskii, Alexey V. "Nanomaterial Production by Arc Discharge Sputtering of Silicon-Graphite and Silica-Graphite Composite Anodes." Key Engineering Materials 805 (June 2019): 94–99. http://dx.doi.org/10.4028/www.scientific.net/kem.805.94.

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This study presents results of an arc discharge synthesis of nanomaterials containing graphene and nanoparticles of SiC ceramic. It has been established that the usage of the silicon-carbon composition of the sputtered electrode in the arc discharge synthesis allows to synthesize graphene structures with silicon carbide nanoparticles with the average size of about 6.2 nm. On the other hand, the usage of the graphite-silica composite electrode also leads to the formation of graphene structures, but at the same time the resulting nanoparticles of silicon carbide have the larger average size of a

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7

Bugárová, Nikola, Zdenko Špitálsky, Matej Mičušík, et al. "A Multifunctional Graphene Oxide Platform for Targeting Cancer." Cancers 11, no. 6 (2019): 753. http://dx.doi.org/10.3390/cancers11060753.

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Diagnosis of oncological diseases remains at the forefront of current medical research. Carbonic Anhydrase IX (CA IX) is a cell surface hypoxia-inducible enzyme functionally involved in adaptation to acidosis that is expressed in aggressive tumors; hence, it can be used as a tumor biomarker. Herein, we propose a nanoscale graphene oxide (GO) platform functionalized with magnetic nanoparticles and a monoclonal antibody specific to the CA IX marker. The GO platforms were prepared by a modified Hummers and Offeman method from exfoliated graphite after several centrifugation and ultrasonication cy

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8

Arbuzov, A. A., S. A. Mozhzhukhin, V. B. Son, and B. P. Tarasov. "REDUCED GRAPHITE OXIDE COMPOSITES WITH NICKEL NANOPARTICLES." Alternative Energy and Ecology (ISJAEE), no. 3-4 (April 22, 2016): 50–60. http://dx.doi.org/10.15518/isjaee.2016.03-04.004.

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9

Gauvin, Florent, Patrice Cousin, and Mathieu Robert. "Effect of modified graphene oxide on the mechanical, thermal, and barrier properties of vinylester." Journal of Composite Materials 52, no. 28 (2018): 3853–64. http://dx.doi.org/10.1177/0021998318770730.

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Graphene, which is a one atom thick layer of graphite, has been considerably studied in the past decade due to its extraordinary physical properties. The development of new routes of synthesis facilitates the use of graphene in polymer nanocomposite. The addition of very small amounts (<1%) of graphene in a polymer matrix does not only increase its thermal and mechanical properties, but it would also enhance permeability, by limiting the diffusion of water through the material. Graphene-polymer nanocomposite would be an interesting alternative to conventional polymer nanocomposite such as n

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10

Paszkiewicz, Sandra, Małgorzata Nachman, Anna Szymczyk, Zdeno Špitalský, Jaroslav Mosnáček, and Zbigniew Rosłaniec. "Influence of expanded graphite (EG) and graphene oxide (GO) on physical properties of PET based nanocomposites." Polish Journal of Chemical Technology 16, no. 4 (2014): 45–50. http://dx.doi.org/10.2478/pjct-2014-0068.

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Abstract This work is the continuation and refinement of already published communications based on PET/EG nanocomposites prepared by in situ polymerization1, 2. In this study, nanocomposites based on poly(ethylene terephthalate) with expanded graphite were compared to those with functionalized graphite sheets (GO). The results suggest that the degree of dispersion of nanoparticles in the PET matrix has important effect on the structure and physical properties of the nanocomposites. The existence of graphene sheets nanoparticles enhances the crystallization rate of PET. It has been confirmed th

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11

Saraswati, Teguh Endah, Fitri Nela Sari, and Nestri Handayani. "SURFACE CHARACTER OF IRON OXIDE/CARBON NANOPARTICLES SYNTHESIZED BY SUBMERGED ARC DISCHARGE METHOD IN ETHANOL/UREA MEDIUM." ALCHEMY Jurnal Penelitian Kimia 13, no. 2 (2017): 287. http://dx.doi.org/10.20961/alchemy.13.2.2392.287-297.

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<p>Synthesis of iron oxide nanoparticles modified with carbon has been successfully performed by submerged arc-discharge method in ethanol/urea medium. Iron oxide used in the fabrication process was prepared by iron electrolysis in an electrolyte solution of NaCl. Fabrication of nanoparticles in this method uses two graphite electrodes. One of them was made in a pointed shape and the other graphite electrodes hollowed out and filled with a mixture of iron oxide, graphite and glue silica (as binder) with a ratio of 1:3:1 (w/w/w). The liquid medium used in this method is a mixture solution

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12

Imran, Habibulla, Palinci Nagarajan Manikandan, and Venkataraman Dharuman. "Facile and green synthesis of graphene oxide by electrical exfoliation of pencil graphite and gold nanoparticle for non-enzymatic simultaneous sensing of ascorbic acid, dopamine and uric acid." RSC Advances 5, no. 78 (2015): 63513–20. http://dx.doi.org/10.1039/c5ra11723b.

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Pencil graphite is electrochemically exfoliated to gain few layered graphene oxide in HCl, NaOH and phosphate buffer saline without ionic liquid for the first time and used for simultaneous sensing of dopamine, ascorbic acid and uric acid in the presence of Au nanoparticles.

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13

Fossum, Jon Otto. "Clay nanolayer encapsulation, evolving from origins of life to future technologies." European Physical Journal Special Topics 229, no. 17-18 (2020): 2863–79. http://dx.doi.org/10.1140/epjst/e2020-000131-1.

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AbstractClays are the siblings of graphite and graphene/graphene-oxide. There are two basic ways of using clays for encapsulation of sub-micron entities such as molecules, droplets, or nanoparticles, which is either by encapsulation in the interlayer space of clay nanolayered stacked particles (“the graphite way”), or by using exfoliated clay nanolayers to wrap entities in packages (“the graphene way”). Clays maybe the prerequisites for life on earth and can also be linked to the natural formation of other two-dimensional materials such as naturally occurring graphite and its allotropes. Here

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14

Sheet, Imtithal, Ahmad Kabbani, and Hanafy Holail. "Removal of Heavy Metals Using Nanostructured Graphite Oxide, Silica Nanoparticles and Silica/ Graphite Oxide Composite." Energy Procedia 50 (2014): 130–38. http://dx.doi.org/10.1016/j.egypro.2014.06.016.

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15

de Alwis, Chathura, Timothy R. Leftwich, Pinaki Mukherjee, Alex Denofre, and Kathryn A. Perrine. "Spontaneous selective deposition of iron oxide nanoparticles on graphite as model catalysts." Nanoscale Advances 1, no. 12 (2019): 4729–44. http://dx.doi.org/10.1039/c9na00472f.

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16

Repp, Sergej, Ersan Harputlu, Seda Gurgen, et al. "Synergetic effects of Fe3+ doped spinel Li4Ti5O12 nanoparticles on reduced graphene oxide for high surface electrode hybrid supercapacitors." Nanoscale 10, no. 4 (2018): 1877–84. http://dx.doi.org/10.1039/c7nr08190a.

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17

Sorescu, Monica, and Richard Trotta. "Mössbauer Study of Graphite-Containing Iron Oxide Nanoparticles." Metallurgical and Materials Transactions A 47, no. 3 (2015): 1404–8. http://dx.doi.org/10.1007/s11661-015-3275-8.

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18

Gao, Jianzhi, and Quanmin Guo. "Pinning platinum and Pt-oxide nanoparticles on graphite." Applied Surface Science 258, no. 14 (2012): 5412–17. http://dx.doi.org/10.1016/j.apsusc.2012.02.026.

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19

Wang, Chun Yu, Mei Ma, Chun Lin Qin, and Guang Wu Wen. "Preparation of Expanded Graphite with Fe₃O₄ Nanoparticles." Advanced Materials Research 690-693 (May 2013): 507–10. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.507.

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In this paper, it can be seen that the optimum mixture ratio of graphite to other contents (graphite: H2SO4: H2O2: HClO4) is 10(g):28(ml):1(ml):5(ml), which obtained the best expansion voluSubscript textme (191ml/g). The Fe3O4-expanded graphite composite material was prepared by FeCl3solution of ethylene glycol with heating reaction in reactor. The graphite sheets within EG were nanoscales, four iron oxide nanoparticles were dispersed between holes of expanded graphite sheets. Evidently, the graphite nanosheets wrapped in the four iron oxide particles can be observed. It is clearly that the ma

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20

Cao, Chun Hua. "Enhanced Photocatalytic Activity of TiO₂/Graphene Oxide Nanocomposites Prepared by the Sol-Gel Method." Applied Mechanics and Materials 302 (February 2013): 176–81. http://dx.doi.org/10.4028/www.scientific.net/amm.302.176.

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TiO2/graphene oxide (TiO2/GO) nanocomposites were prepared by the sol-gel method using tetrabutyl titanate and graphite oxide as the main raw materials. The microstructure of TiO2/GO nanocomposites was analyzed by X-ray diffraction and transmission electron microscopy. The results showed that graphene oxide was uniformly covered with sphere-like anatase TiO2 nanoparticles, which had a diameter of about 10 nm. Reactive brilliant red X-3B (X-3B) was used as model pollutant to study the photocatalytic activity of the composites. The effect of key factors on X-3B degradation was investigated. The

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21

Wu, Hui Qing, and Qing Ping Wu. "Research Progress of Nanomaterials about Removal of Toxic Metal Ions and Organics Used in Water Treatment." Advanced Materials Research 662 (February 2013): 207–13. http://dx.doi.org/10.4028/www.scientific.net/amr.662.207.

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This paper is a simple review of nanomaterials about removal of toxic metal ions and organics from water/wastewater, include nanomaterial types, preparation methods and the research progress. Introduced with emphasis on nanoscale zero-valent iron, iron oxide nanoparticles, nanosized metal oxides, magnetic nanoparticles and mesoporous magnetic adsorbents with support medium such as bentonite, zeolites, sand, activated carbon, multiwall carbon nanotubes, porous molecular sieve and graphite alkenyl nanometer film. Some capping agents for preventing polymerization of nanoparticles were also introd

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22

Богомолов, А. Б., С. А. Кулаков, П. В. Зинин, В. А. Кутвицкий та М. Ф. Булатов. "Получение флуоресцентных композитных материалов на основе графитоподобного нитрида углерода". Журнал технической физики 129, № 7 (2020): 910. http://dx.doi.org/10.21883/os.2020.07.49562.109-20.

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Highly fluorescent composite powder based on graphite-like carbon nitride (g-C3N4) was obtained by thermal decomposition of melamine in the presence of nanoparticles of aluminum oxide, titanium oxide and silicon oxide. The fluorescence properties of composite nanoparticles were studied with lazer having a wavelength of 532 nm. The relative quantum yield of the obtained material was 62%.

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23

Vatui (Moise), Alexandra Georgiana, Sorina Nicoleta Valsan, Corneliu Fratila, et al. "Synthesis and Characterization of Composite Membranes Based on Carbon Functionalized with Gold Nanoparticles." Materiale Plastice 56, no. 2 (2019): 309–14. http://dx.doi.org/10.37358/mp.19.2.5177.

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The purpose of this experimental laboratory work is to obtain composite membranes having carbon and gold nanoparticles in the matrix. Consideration was made of using graphene oxide, a material which, under certain conditions, can generate membranes by a self-assembly process under vacuum in an aqueous or organic medium. The cellulose acetate (CA) - graphene oxide (GO) composite membranes have been functionalized with gold nanoparticles (AuNP) by two technological processes: thermal evaporation and ultrasonic mixing of stable graphene oxide and gold suspensions. The stable suspensions containin

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24

Piaskowski, Krzysztof, and Paweł K. Zarzycki. "Carbon-Based Nanomaterials as Promising Material for Wastewater Treatment Processes." International Journal of Environmental Research and Public Health 17, no. 16 (2020): 5862. http://dx.doi.org/10.3390/ijerph17165862.

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In the latest literature search, the technology based on graphite oxide (GO) nanomaterials exhibits a great potential in many aspects of wastewater treatment involving adsorption, photocatalysis, disinfection and membrane process. In this study experimental data involving the carbon element in different forms such as active carbon (AC), graphite and graphene oxide (GO) applied as the active reagents in wastewater treatment are summarized and discussed. The first step was to characterize the aforementioned carbon materials and nanoparticles using various complementary techniques. These include

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Aguilera Mandujano, A., and J. Serrato Rodriguez. "Synthesis and characterization of titania/graphene nanocomposite for application in photocatalysis." Revista Mexicana de Física 66, no. 5 Sept-Oct (2020): 610. http://dx.doi.org/10.31349/revmexfis.66.610.

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Titanium dioxide has been extensively investigated as a photocatalyst for water purification, presenting limitations such as recombination of electron-hole pairs generated by photons. The titania / graphene nanocomposites are promising materials to overcome these limitations due to the high specific area of graphene and unique electronic properties. In this work, an anatase-graphene nanocomposite was synthesized by a simple mixture assisted by ultrasound. Graphene was obtained by electrochemical exfoliation of graphite using the electrolysis technique. On the other hand, anatase was synthesize

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Xu, Chao, Xin Wang, Junwu Zhu, Xuejie Yang, and Lude Lu. "Deposition of Co3O4 nanoparticles onto exfoliated graphite oxide sheets." Journal of Materials Chemistry 18, no. 46 (2008): 5625. http://dx.doi.org/10.1039/b809712g.

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27

Oliveira, João Pedro Jenson de, Marta Bonet San Emeterio, Acelino Cardoso de Sá, Leonardo Lataro Paim, and Manel del Valle. "Methanol, Ethanol, and Glycerol Oxidation by Graphite-Epoxy Composite Electrodes with Graphene-Anchored Nickel Oxyhydroxide Nanoparticles." Proceedings 42, no. 1 (2019): 5. http://dx.doi.org/10.3390/ecsa-6-06544.

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In this work, a graphite-epoxy electrode with cyclic voltammetry electrodeposited reduced graphene oxide and nickel oxyhydroxide nanoparticles was prepared by decomposition in NaOH alkaline solution of cyclic voltammetry electrodeposited nickel hexacyanoferrate. FE-SEM studies were performed to confirm the NiOOH nanoparticle; the average size of the NiOOH nanoparticles was 61 ± 16 nm and EDX was applied to analyze chemical composition. To verify the performance of the prepared electrode, it was used in the electrooxidation of alcohols in alkaline medium by cyclic voltammetry. By performing dif

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Gotoh, Kazuma, Taro Kinumoto, Eiji Fujii, et al. "Exfoliated graphene sheets decorated with metal/metal oxide nanoparticles: Simple preparation from cation exchanged graphite oxide." Carbon 49, no. 4 (2011): 1118–25. http://dx.doi.org/10.1016/j.carbon.2010.11.017.

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29

Thareja, Raj K., A. Mohanta, D. Yadav, and A. Kushwaha. "Synthesis and Characterization of Nanoparticles and Nanocrystalline Functional Films." Materials Science Forum 636-637 (January 2010): 709–13. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.709.

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This work reports on spectroscopic investigations of interaction of an expanding laser ablated plume of aluminum, zinc, graphite with ambient atmosphere of oxygen and nitrogen gas and the formation of nitrides and oxides. The ambient pressure and fluence dependence on the reactive process occurring in the ablated plume responsible for formation of oxides and nitrides is discussed. Fast photography/imaging technique using intensified charge coupled device (ICCD) is gaining importance as a diagnostic tool for understanding the dynamics of the expanding plasma plume and the gas phase nanoparticle

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Wang, Li, Yantao Sun, Xiangxin Xue, Yujing Sun, and Zhuang Li. "Graphite-specific peptide mediated synthesis of Pt nanoparticles on reduced graphene oxide for electrochemical detection of H2O2." Functional Materials Letters 09, no. 03 (2016): 1650051. http://dx.doi.org/10.1142/s179360471650051x.

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We demonstrate here a facile and effective strategy to prepare reduced graphene oxide-platinum nanoparticle (RGO-PtNP) nanohybrids by the mediation of graphite-specific peptide (GSP). For the first time, we found that GSP can be used to modify RGO non-covalently in one way, and in another way promote the formation of PtNPs on RGO as a biomolecular bridge. The created RGO-PtNP nanohybrids show enhanced electrocatalytic activity toward H2O2 and can be utilized to fabricate non-enzymatic electrochemical H2O2 sensor.

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Jana, Arpita, Elke Scheer, and Sebastian Polarz. "Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields." Beilstein Journal of Nanotechnology 8 (March 24, 2017): 688–714. http://dx.doi.org/10.3762/bjnano.8.74.

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Single layer graphite, known as graphene, is an important material because of its unique two-dimensional structure, high conductivity, excellent electron mobility and high surface area. To explore the more prospective properties of graphene, graphene hybrids have been synthesised, where graphene has been integrated with other important nanoparticles (NPs). These graphene–NP hybrid structures are particularly interesting because after hybridisation they not only display the individual properties of graphene and the NPs, but also they exhibit further synergistic properties. Reduced graphene oxid

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Host, J. J., M. H. Teng, J. H. Hwang, et al. "AEM characterization of magnetic nanoparticles encased in graphite shells." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 216–17. http://dx.doi.org/10.1017/s0424820100137458.

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Since it was discovered that crystalline materials could be encased in graphite shells, protection in this manner has been the focus of significant research. Previously, production of graphite encapsulated crystalline nanoparticles has been reported using an arc discharge between an anode stuffed with a metal oxide and a graphite cathode, resulting in a mixture of carbides, encapsulated carbides and carbonaceous debris. More recently, an arc discharge between metal electrodes has been used to produce large quantities of pure metal nanoparticles, with the addition of graphite to the anode resul

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Sorescu, Monica, and Mark Allwes. "Behavior of Graphite and Graphene under Mechanochemical Activation with Hematite and Magnetite Nanoparticles." MRS Advances 4, no. 3-4 (2018): 155–62. http://dx.doi.org/10.1557/adv.2018.632.

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ABSTRACTEquimolar mixtures of graphene and iron oxide nanoparticles were subjected to mechanochemical activation. The phase sequence was investigated using Mӧssbauer spectroscopy as function of ball milling time. For low milling times (2-4 hours) the series with hematite (Fe2O3) nanoparticles was fitted with 2 sextets, corresponding to hematite with carbon introduced in the lattice. At high milling times (8-12 hours) the same series exhibited an additional sextet with hyperfine parameters characteristic to iron carbides and a quadrupole-split doublet, which could be assigned to carbon clusters

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Jovic, Natasa, Maria Calatayud, Beatriz Sanz, Amelia Montone, and Gerardo Goya. "Ex situ integration of iron oxide nanoparticles onto the exfoliated expanded graphite flakes in water suspension." Journal of the Serbian Chemical Society 79, no. 9 (2014): 1155–67. http://dx.doi.org/10.2298/jsc131121019j.

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Hybrid structures composed of exfoliated expanded graphite (EG) and iron oxide nanocrystals have been produced by an ex situ process. The iron oxide nanoparticles coated with meso-2,3-dimercaptosuccinic acid (DMSA), or poly(acrylic) acid (PAA) were integrated onto the exfoliated EG flakes by mixing their aqueous suspensions at room temperature under support of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccin-nimide (NHS). EG flakes have been used both, naked and functionalized with branched polyethylenimine (PEI). Complete integration of two constituents has been achieve

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Hu, Hua-Wen, Guo-Hua Chen, Ming Fang, and Wei-Feng Zhao. "Modification of graphite oxide nanoparticles prepared via electrochemically oxidizing method." Synthetic Metals 159, no. 14 (2009): 1505–7. http://dx.doi.org/10.1016/j.synthmet.2009.03.016.

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Mastalir, Á., Z. Király, Á. Patzkó, I. Dékány, and P. L’Argentiere. "Synthesis and catalytic application of Pd nanoparticles in graphite oxide." Carbon 46, no. 13 (2008): 1631–37. http://dx.doi.org/10.1016/j.carbon.2008.06.054.

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Rydzkowski, Tomasz, Kazimierz Reszka, Mieczysław Szczypiński, Michał Marek Szczypiński, Elżbieta Kopczyńska, and Vijay Kumar Thakur. "Manufacturing and Evaluation of Mechanical, Morphological, and Thermal Properties of Reduced Graphene Oxide-Reinforced Expanded Polystyrene (EPS) Nanocomposites." Advances in Polymer Technology 2020 (April 25, 2020): 1–9. http://dx.doi.org/10.1155/2020/3053471.

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The aim of the present study is to examine the effect of the addition of carbon nanoparticles (σsp2 hybridization) on the mechanical properties of foamed polystyrene. In this work, we focus on the study of the impact of compressive stress, tensile strength, bending strength, thermal conductivity ratio (λ), and water absorption of expanded polystyrene (EPS) reinforced with reduced graphene oxide and graphite. The results were compared with pristine EPS and reduced graphene oxide-reinforced EPS. All the nanocomposite specimens used for testing had a similar density. The study reveals that the na

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Alimirzaloo, V., S. SheydayiGurchinQaleh, P. MashhadiKeshtiban, and S. Ahmadi. "Investigation of the effect of CuO and AL2O3 nanolubricants on the surface roughness in the forging process of aluminum alloy." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 12 (2017): 1595–604. http://dx.doi.org/10.1177/1350650117702816.

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Lubrication is an essential factor in the metal forming processes such as forging, since it leads to reducing friction at contact surfaces and increasing the surface quality of the forged parts. In order to create desirable tribological properties in the base lubricants, various metal oxide nanoparticles are mostly used as additives. In the present study, the effects of the nanolubricants made by copper oxide (CuO) and alumina (AL2O3) nanoparticles on the surface quality of the forging process have been investigated. The effects of the nanolubricants have been compared with the graphite as a c

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Misiurev, Denis, Ştefan Ţălu, Rashid Dallaev, Dinara Sobola, and Mariya Goncharova. "Preparation of PVDF-CNT composite." E3S Web of Conferences 270 (2021): 01012. http://dx.doi.org/10.1051/e3sconf/202127001012.

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Limitations of ceramic piezomaterials (brittleness, toxicity of lead-containing samples, difficulties of complicated shapes preparations, etc.) call for the research in the field of piezoelectric polymers. One of them is polyvinylidene fluoride (PVDF). It could be prepared in various forms: thin films, bulk samples, fibers. PVDF fibers attract the most attention because of high flexibility, lightweight, mechanical stability, chemical inertness. Properties of PVDF fibers can be tuned using dopant material: ceramic particles, metal nanoparticles, graphite materials as graphene oxide or carbon na

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Tan, Tong Ling, Sharifah Bee Abd Hamid, Kian Mun Lee, and Chin Wei Lai. "Fabrication of TiO₂ Nanoparticles on Large-Area Graphene Oxide Sheets as Promising Photocatalytic Material." Materials Science Forum 860 (July 2016): 39–42. http://dx.doi.org/10.4028/www.scientific.net/msf.860.39.

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Nowadays, the discharge of synthetic dyes effluents into water system has created serious water contamination problems which could gravely impact the quality of human life. Photocatalytic oxidation (PCO) by TiO2 has shown superior performance on towards the remediation of various organic pollutants. In this study, two dimensional (2D) graphene oxide (GO) sheets supported titanium dioxide (TiO2) nanoparticles were successfully synthesized by a simple and efficient sol-gel method using titanium isopropoxide (TTIP) and GO as the precursor. The graphite powder was first oxidized into hydrophilic G

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Zhou, Qing, Guang Can Wang, Long Yang, Yun Yang, and Yang Xu. "Carboxylic Graphene-Supported Platinum and Platinum-Palladium Nanoparticles with High Electrocatalytic Activity for Methanol Oxidation." Applied Mechanics and Materials 320 (May 2013): 670–74. http://dx.doi.org/10.4028/www.scientific.net/amm.320.670.

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Pt, Pd and Pt-Pd nanoparticles (NPs) were synthesized on carboxylic graphene (CGR) sheets. The nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR) and UVvis absorption spectroscopy. Their electrocatalytic activity for methanol oxidation was also investigated. The results showed the peak current density of methanol oxidation of Pt NPs-Graphite oxide (GO), Pd NPs-CGR, Pt NPs-CGR and Pt-Pd NPs-CGR is 12.2μA/cm2, 14.1μA/cm2, 15.1μA/cm2and 21.5μA/cm2respectively. The nanocomposite of CGR as catalyst supports and Pt-Pd NPs as catalyzers

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Asgari, Ghorban, Abdolmotaleb Seidmohammadi, Ali Esrafili, Javad Faradmal, Mohammad Noori Sepehr, and Maghsoud Jafarinia. "The catalytic ozonation of diazinon using nano-MgO@CNT@Gr as a new heterogenous catalyst: the optimization of effective factors by response surface methodology." RSC Advances 10, no. 13 (2020): 7718–31. http://dx.doi.org/10.1039/c9ra10095d.

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In this research, the degradation of the insecticide diazinon was studied using a new hybrid catalyst consisting of magnesium oxide nanoparticles (nano-MgO), carbon nanotubes (CNTs), and graphite (Gr), nano-MgO@CNT@Gr, under various experimental conditions.

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Kozub, Barbara, Jan Kazior, and Aneta Szewczyk-Nykiel. "Sintering Kinetics of Austenitic Stainless Steel AISI 316L Modified with Nanographite Particles with Highly Developed BET Specific Surface Area." Materials 13, no. 20 (2020): 4569. http://dx.doi.org/10.3390/ma13204569.

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The subject of this work was the study of processes occurring during sintering of water atomized AISI 316L austenitic stainless steel powder modified by the addition of graphite nanoparticles. The main purpose of the work was to determine the effect of modification of the AISI 316L stainless steel austenitic powder by the addition of graphite nanopowder on the sintering kinetics and oxide reduction mechanism. The phenomena occurring during the sintering process and oxide reduction mechanisms were subjected to detailed characterizations. Mixtures with two types of nanopowder with a high BET (me

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ZHENG, YUN-XIAO, JIAN XIE, SHUANG-YU LIU, et al. "RAPID SYNTHESIS OF CoSb3/GRAPHENE NANOCOMPOSITES BY ONE-POT SOLVOTHERMAL ROUTE AND THEIR ELECTROCHEMICAL PROPERTIES." Functional Materials Letters 05, no. 01 (2012): 1250002. http://dx.doi.org/10.1142/s1793604712500026.

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A facile synthetic approach for CoSb3 /graphene nanocomposite has been developed in this work. By adjusting Co/Sb molar ratio, reaction temperature, and reaction time, we found that nanocrystalline CoSb3 (5–10 nm) can form at a low temperature of 180°C and a short time of only 1 h via a one-pot solvothermal route. At the same time, graphite oxide can be reduced to graphene with uniformly loaded CoSb3 nanoparticles. The composites have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and transmission elec

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Sorescu, Monica, and Richard Trotta. "Carbon-Substituted Hematite and Magnetite Nanoparticles." MRS Advances 1, no. 3 (2015): 221–26. http://dx.doi.org/10.1557/adv.2015.17.

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ABSTRACTGraphite-doped hematite and magnetite nanoparticles systems (∼50 nm) were prepared by mechanochemical activation for milling times ranging from 2 to 12 hours. Their structural and magnetic properties were studied by 57Fe Mössbauer spectroscopy. The spectra corresponding to the hematite milled samples were analyzed by considering two sextets, corresponding to the incorporation of carbon atoms into the iron oxide structure. For ball milling time of 12 hours a quadrupole split doublet has been added, representing the contribution of ultrafine particles. The Mössbauer spectra of graphite-d

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Fu, Yu, Jianjun Yao, Honghao Zhao, Gang Zhao, Zhenshuai Wan, and Ying Qiu. "Bidisperse Magnetic Particles Coated with Gelatin and Graphite Oxide: Magnetorheology, Dispersion Stability, and the Nanoparticle-Enhancing Effect." Nanomaterials 8, no. 9 (2018): 714. http://dx.doi.org/10.3390/nano8090714.

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The magnetorheology and dispersion stability of bidisperse magnetic particles (BMP)-based magnetorheological (MR) fluids were improved by applying a novel functional coating composed of gelatin and graphite oxide (GO) to the surfaces of the micron-sized carbonyl iron (CI) and nanoparticles Fe3O4. Gelatin acted as a grafting agent to reduce the aggregation and sedimentation of CI particles and prevent nanoparticles Fe3O4 from oxidation. In addition, a dense GO network on the surface of gelatin-coated BMP was synthesized by self-assembly to possess a better MR performance and redispersibility. T

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Kusiak-Nejman, Ewelina, Dariusz Moszyński, Joanna Kapica-Kozar, Agnieszka Wanag, and Antoni Morawski. "Assessment of the Suitability of the One-Step Hydrothermal Method for Preparation of Non-Covalently/Covalently-Bonded TiO2/Graphene-Based Hybrids." Nanomaterials 8, no. 9 (2018): 647. http://dx.doi.org/10.3390/nano8090647.

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A hybrid nanocomposites containing nanocrystalline TiO2 and graphene-related materials (graphene oxide or reduced graphene oxide) were successfully prepared by mechanical mixing and the hydrothermal method in the high-pressure atmosphere. The presented X-ray photoelectron spectroscopy (XPS) study and quantitative elemental analysis confirm similar content of carbon in graphene oxide GO (52 wt% and 46 wt%, respectively) and reduced graphene oxide rGO (92 wt% and 98 wt%, respectively). No chemical interactions between TiO2 and GO/rGO was found. TiO2 nanoparticles were loaded on GO or rGO flakes.

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Schmitz, Alexa, Kai Schütte, Vesko Ilievski, et al. "Synthesis of metal-fluoride nanoparticles supported on thermally reduced graphite oxide." Beilstein Journal of Nanotechnology 8 (November 22, 2017): 2474–83. http://dx.doi.org/10.3762/bjnano.8.247.

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Metal-fluoride nanoparticles, (MF x -NPs) with M = Fe, Co, Pr, Eu, supported on different types of thermally reduced graphite oxide (TRGO) were obtained by microwave-assisted thermal decomposition of transition-metal amidinates, (M{MeC[N(iPr)]2} n ) or [M(AMD) n ] with M = Fe(II), Co(II), Pr(III), and tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium, Eu(dpm)3, in the presence of TRGO in the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]). The crystalline phases of the metal fluorides synthesized in [BMIm][BF4] were identified by powder X-ray diffraction (PXRD)

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Eremina, E. A., E. E. Ondar, A. V. Sidorov, A. V. Grigor’eva, and E. A. Gudilin. "Reduced graphite oxide decorated with gold nanoparticles for Raman scattering spectroscopy." Nanotechnologies in Russia 10, no. 5-6 (2015): 370–79. http://dx.doi.org/10.1134/s1995078015030052.

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Kim, Hyoung-Mi, Kyoung-Min Kim, Kyunghong Lee, Yoon Suk Kim, and Jae-Min Oh. "Nano-Bio Interaction between Graphite Oxide Nanoparticles and Human Blood Components." European Journal of Inorganic Chemistry 2012, no. 32 (2012): 5343–49. http://dx.doi.org/10.1002/ejic.201200587.

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