Abstract

The preparation of hydro- and aerogels based on reduced graphite oxide and gold nanoparticles obtained by the method of Turkevich is described. According to the transmission electron microscopy data, gold nanoparticles have a spherical shape and an average size of 16‒18 nm. Sorption of methylene blue dye from water solutions was used to characterize the obtained 3D structures. The sorption properties of hydro- and aerogels were compared; it was shown that aerogels sorb the dye more efficiently (>80%) than a composite based on hydrogel (~50%). The formed porous 3D structure of the aerogel efficiently sorbs the molecules of the dye, while the gold nanoparticles facilitate its destruction under the visible light. Sorption by aerogels of pure graphite oxide is most efficient at room temperature, in a neutral medium, and in the absence of additional reducing agents. Introduction of gold nanoparticles to aerogels led to an increase of the maximal sorption by 15%.

中文翻译：

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基于还原性氧化石墨和金纳米粒子的3D结构及其吸附性能

摘要

描述了基于Turkevich方法获得的基于还原性氧化石墨和金纳米颗粒的水凝胶和气凝胶的制备。根据透射电子显微镜数据，金纳米颗粒具有球形形状，平均尺寸为16‒18 nm。使用亚甲基蓝染料从水溶液中的吸附来表征获得的3D结构。比较了水凝胶和气凝胶的吸附性能；结果表明，与基于水凝胶的复合材料（〜50％）相比，气凝胶更有效地吸附染料（> 80％）。形成的气凝胶多孔3D结构有效吸收了染料的分子，而金纳米颗粒则促进了其在可见光下的破坏。在室温下，在中性介质中，纯石墨氧化物的气凝胶吸附最有效，在没有其他还原剂的情况下。将金纳米颗粒引入气凝胶导致最大吸附量增加了15％。