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化学大会:2019 -改性石墨烯的新趋势与照片不同的方法对催化应用程序——Won-Chun哦

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由于其独特的原子2 d结构和显著的物理化学性质,石墨烯已经引发了一系列研究其光学、电子、热、力学性能。特别是,最近大量的注意力已经被吸引到探索石墨烯和石墨烯复合材料的光电化学的应用程序。最近,很多作品已经完成试图设计和准备新的石墨烯材料在photo-electrochemistry广泛应用,从光电化学太阳能电池,有机污染物的光催化分解,H2进化。在这篇文章中,我们总结photo-electrochemistry研究石墨烯材料的状态。这个令人兴奋的前景,进一步发展graphenebased材料领域也进行了讨论。Graphene-a单原子厚度平面薄板的碳原子排列在蜂巢晶体lattice-continues做一个凝聚态研究的最活跃的地区之一。其属性,包括机械刚度和强度高(缺陷时免费的,因此到目前为止,只有小距离像微米),包括高电气和热导率,使石墨烯一个激动人心的纳电子学的未来的应用前景,热管理和能源存储设备。优化这种潜在的关键之一是调优的能力通过化学功能化石墨烯的性质。的目的最新物理学杂志》的焦点问题是提供一系列的快照最新最先进的技术现在用来控制和治疗织物。氧化石墨烯以天然鳞片石墨粉的悍马方法。 Thus, 2 g of graphite powder, 1 g of NaNO3, and 46 ml of concentrated H2SO4 were mixed together during a flask placed into an ice bath and stirred for 30 min. Then, 6 mg of KMnO4 was added into the mixture by portions to stop the temperature rise above 20 °C and stirred for two h. Subsequently, the temperature of suspension was delivered to 35 °C and maintained at this level for an hour. Then, 92 ml of water was added at ambient temperature into the brownish gray paste, causing violent effervescence and a rise of temperature to 98 °C. The obtained diluted, brown color suspension was kept at this temperature for several minutes; during this point , the answer changed its color to bright yellow; and after this, the suspension was further diluted with 250 ml of warm water and treated with 20 ml of H2O2 to scale back the residual permanganate and manganese dioxide. While the suspension was still warm, it had been vacuum filtered to avoid precipitation of side products. The filter cake was washed with warm water and centrifuged on a Sigma 6-16 K centrifuge (SciQuip, USA). The obtained sediment was freeze-dried on a Gamma 1-16 LSC plus machine (Martin Christ Gefriertrocknungsanlagen GmbH). In chemistry, photocatalysis is that the acceleration of a photoreaction within the presence of a catalyst. In catalysed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity (PCA) depends on the power of the catalyst to make electron–hole pairs, which generate free radicals (e.g. hydroxyl radicals: •OH) ready to undergo secondary reactions. Its application was made possible by the invention of water electrolysis by means of titanium oxide (TiO2). Research in photocatalysis subsided for over 25 years thanks to lack of interest and absence of practical applications. However, in 1964, V.N. Filimonov investigated isopropanol photooxidation from ZnO and TiO2; at round the same time, Kato and Mashio, Doerffler and Hauffe, and Ikekawa et al. (1965) explored oxidation/photooxidation of CO2 and organic solvents from ZnO radiance. a couple of years later, in 1970, Formenti et al. and Tanaka and Blyholde observed the oxidation of varied alkenes and therefore the photocatalytic decay of laughing gas (N2O), respectively.

Won-Chun哦

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