Developing a high-efficient, low-cost visible-light-responsive photocatalyst is still a challenge in environmental remediation. Here, a three-dimensional (3D) porous architecture named reduced graphene oxide/CdS nanowire (RGO/CdS) aerogel was constructed by a facile two-step approach through coupling graphene with one-dimensional CdS nanowires (CdS NWs). A variety of characterization methods displayed that the resultant RGO/CdS aerogels were embedded with large amounts of CdS NWs with an average length and width of ∼ 2.9 μm and ∼ 60 nm, respectively, which would maximize the specific surface area that in turn markedly facilitate the transportation of photogenerated charge carriers and strong adsorption of organic pollutants. Moreover, the visible-light photocatalytic experiments demonstrated that the RGO/CdS aerogel exhibited a higher degradation rate (96.6%) for methylene blue (MB) degradation compared with that of bare CdS NWs or pure RGO xerogel. In this proposed study, a photocatalytic mechanism indicates that the enhanced photocatalytic activity of the 3D framework might contribute potentially to generate synergetic effect of CdS NWs into the space of graphene sheets.

在环境修复中，开发高效，低成本的可见光响应型光催化剂仍然是一个挑战。在这里，通过将石墨烯与一维CdS纳米线（CdS NWs）耦合的简便两步方法，构建了名为还原的氧化石墨烯/ CdS纳米线（RGO / CdS）气凝胶的三维（3D）多孔结构。多种表征方法显示，所得的RGO / CdS气凝胶被大量CdS NW包埋，其平均长和宽分别约为2.9μm和〜60 nm，这将使比表面积最大化，进而明显促进光生载流子的运输和对有机污染物的强吸附。此外，可见光光催化实验表明，与裸露的CdS净水或纯RGO的干凝胶相比，RGO / CdS气凝胶对亚甲基蓝（MB）的降解表现出更高的降解率（96.6％）。在这项拟议的研究中，一种光催化机制表明3D框架增强的光催化活性可能潜在地有助于在石墨烯片的空间中产生CdS NW的协同效应。