以二水合氯化铜和硫代乙酰胺分别作为铜源和硫源,采用水浴法于65℃合成纳米硫化铜(CuS),然后采用水热法将纳米CuS与氧化石墨烯混合,加入抗坏血酸作为还原剂,在180℃下反应制备了纳米硫化铜/还原氧化石墨烯(CuS/RGO)复合材料。利用X射线衍射仪、X射线光电子能谱仪、拉曼光谱仪、扫描电子显微镜、比表面积及孔隙度分析仪、紫外-可见-近红外漫反射测试仪对复合材料进行了测试表征,以150W氙灯作为可见光源,在可见光照射下考察了纳米CuS、RGO和纳米CuS/RGO复合材料对亚甲基蓝(MB)的光催化降解性能。结果表明,纳米CuS均匀负载于RGO表面,复合材料的比表面积高达66.5m2/g,在波长300～700nm范围可见光吸收性能良好。在可见光照射120min条件下,用量均为0.03g的纳米CuS、RGO、纳米CuS/RGO复合材料对MB的降解率分别为38.4%、21.3%、78.5%,用量为0.1g的纳米CuS/RGO复合材料对MB降解率达到了98.6%,说明RGO的引入极大提高了纳米CuS在可见光区域的光催化活性。
Copper chloride dihydrate was used as copper source and thioacetamide was used as sulfur source.Nano-CuS was prepared by water bath method at 65℃,then CuS/RGO nanocomposites were prepared by mixed nano-CuS with GO at 180℃ by hydrothermal method,while ascorbic acid was added as reducing agent.All composites were characterized by XRD,XPS,Raman,SEM,BET,UV-Vis,and the photocatalytic activity of nano-CuS,RGO and CuS/RGO was evaluated by degradation of methylene blue under xenon lamps(150W) irradiation.The results showed that the nano-CuS was evenly composed with the RGO,and the specific surface area of the composite was 66.5m2/g,and the UV-Vis showed a outstanding visible light absorption performance.The degradation rate of 0.03g CuS,RGO,and CuS/RGO was 38.4%,21.3%,78.5% after 120min irradiation.The degradation rate of 0.1g CuS/RGO reached 98.6% after 120min of irradiation,which indicated that the introduction of RGO greatly improved the photocatalytic property of CuS in the visible light region.
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