One-pot synthesis of CdS–reduced graphene oxide 3D composites with enhanced photocatalytic properties
One-pot synthesis of CdS–reduced graphene oxide 3D composites with enhanced photocatalytic properties
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DOI：
10.1039/c3ce41807c
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发表时间：
2014
期刊：
影响因子：
3.1
通讯作者：
Jiahong Wang;S. Liang;Liang Ma;Si-Jing Ding;Xuefeng Yu;Li Zhou;Ququan Wang
中科院分区：
文献类型：
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作者：
Jiahong Wang;S. Liang;Liang Ma;Si-Jing Ding;Xuefeng Yu;Li Zhou;Ququan Wang
以L-半胱氨酸为硫源、还原剂和连接剂，采用一锅溶剂热法，用乙二胺还原氧化镉并控制其形貌，制备了巢状硫化镉还原氧化石墨烯(CDS-RGO)复合材料。通过对复合材料的形貌、结构和组成的考察，发现在rGO片材上修饰了巢状的硫化镉颗粒，GO的加入并没有影响巢状硫化镉的晶体结构和形状。与纯的硫化镉相比，制备的硫化镉-rGO复合材料对可见光的吸收增强，比表面积扩大，光生电荷的分离更加容易。因此，在可见光照射下，CdS-rGO复合材料对罗丹明B的降解表现出较好的光催化活性和良好的光稳定性。通过结合RGO和三维结构硫化镉微粒的良好性能，本研究提出的策略有望在制备各种领域潜在应用的高效石墨烯-半导体复合材料方面发挥作用。
Nest-like CdS–reduced graphene oxide (CdS–rGO) composites were prepared through a one-pot solvothermal method in which ethylenediamine was used to reduce GO and control the morphology of the CdS, and L-cysteine was used as the sulfur source, reducing agent, and linker between the CdS and rGO. By examining the morphology, structure, and composition of the composites, it could be found that the nest-like CdS particles were decorated on the rGO sheet, and the addition of GO did not influence the crystal structure and shape of the nest-like CdS. Compared with pure CdS, the as-prepared CdS–rGO composites showed enhanced visible light absorption, extended surface area, and facilitated separation of photogenerated charges. Hence, the CdS–rGO composites exhibited improved photocatalytic activity and excellent photostability for the degradation of rhodamine B under visible light irradiation. By combining the good properties of rGO and three-dimensional structured CdS microparticles, the strategy presented in this study is expected to be useful in preparing highly efficient graphene–semiconductor composites for potential applications in various fields.