摘要
以乙酸镉、2-巯基苯并噻唑、硫化钠和氯化铜为原料,依次利用液相热分解与离子吸附法,改变CdS晶化时间及含量,制备了4种CdS/CuS纳米复合材料.研究结果表明:CdS/CuS纳米复合材料呈类球形核壳结构,改变CdS晶化时间可以控制CdS/CuS纳米复合材料粒径大小; CdS的晶化时间为10 min,CdS与CuS摩尔比为4∶1的纳米复合材料光催化活性最佳,25 min内对Rh B和MB的降解效率均达到99%.
Four CdS/CuS core-shell nanocomposite samples with different molar ratios of CdS to CuS were synthesized via liquid-phase thermal decomposition and ion adsorption method under different crystallization time of CdS,using cadmium acetate,2-mercaptobenzothiazole,sodium sulfide and cupric chloride as the raw materials. The experimental results indicated that the samples were spherical nucleus-like structures and their particle size was controllable with the crystallization time of CdS. The degradation efficiencies of rhodamine B( RhB) and methylene blue( MB) both reached about 99% when the molar ratio of CdS to CuS was 4 ∶ 1 and the crystallization time of CdS was 10 min. The method of ion adsorption makes CuS fully coat on the surface of CdS,forming effective core-shell structure and obviously improving the photocatalytic performance of CdS.
引文
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