Three-dimensional graphene-based aerogels prepared by a self-assembly process and its excellent catalytic and absorbing performance
Three-dimensional graphene-based aerogels prepared by a self-assembly process and its excellent catalytic and absorbing performance
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自组装工艺制备的三维石墨烯基气凝胶及其优异的催化吸附性能
DOI：
10.1039/c3ta10989e
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Gao, Jianping
中科院分区：
文献类型：
--
作者：
Wu, Tao;Chen, Mingxi;Gao, Jianping
开发了一种简单的一步法，使用铜纳米颗粒制造具有互连 3D 网络的石墨烯基水凝胶 (GH)。在此过程中，氧化石墨烯（GO）被Cu纳米颗粒还原形成还原GO（rGO），然后自组装形成GH。同时，Cu纳米颗粒被氧化形成氧化铜(I)，其沉积在rGO片上并嵌入GH中。通过绿色冷冻干燥方法将GH转化为石墨烯基气凝胶（GA）。通过简单地改变 Cu 纳米颗粒的初始量或 GO 悬浮液的浓度，可以轻松调整 GA 的组成。 GA不仅对4-硝基苯酚的催化还原和甲基橙的光催化降解具有良好的催化性能，而且对水中各种油类和染料具有优异的去除能力。
A simple one-step method for fabricating graphene-based hydrogels (GHs) with interconnected 3D networks using Cu nanoparticles was developed. During this process, graphene oxide (GO) was reduced by Cu nanoparticles to form reduced GO (rGO) which then self-assembled to form GHs. Meanwhile, the Cu nanoparticles were oxidized to form copper(I) oxide which deposited onto the rGO sheets and became imbedded in the GHs. The GHs were transformed to graphene-based aerogels (GAs) by a green freeze-drying method. The composition of the GAs can be easily adjusted by simply changing the initial amount of Cu nanoparticles or the concentration of the GO suspension. The GAs not only possess good catalytic performance for the catalytic reduction of 4-nitrophenol and the photocatalytic degradation of methyl orange but also have excellent capacities for removing various oils and dyes from water.