Abstract:

Photocatalysts with different proportions of Cd_xZn_1-xS(x=0,0.2,0.4,0.6,0.8,1) have been synthesized by sol-gel method. Their structures and optical characteristics are characterized by analysis approaches,including scanning electron microscopy(SEM). X-ray diffraction(XRD),and fourier transform infrared spectroscopy(FT-IR). The catalytic degradation capacity of Cd_xZn_1-xS with different quantity relative ratios for three kinds of dyestuff,namely,methyl orange,methylene blue and rhodamine B are investigated. The results show that the catalytic activity of the prepared material for the three kinds of dyestuff are all comparatively high,among which the catalytic activity of Cd_xZn_1-xS is the highest. Organic pollutants can completely be degraded within 1 h. Meanwhile it has very good reusability,and the degradation rate of the material tested for 5 times continuously is above 90%.

Key words: sol-gel method, Cd_xZn_1-xS catalyst, degradation, catalytic activity

摘要：

采用溶胶-凝胶法制备了不同比例的Cd_xZn_1-xS光催化剂（x分别为0、0.2、0.4、0.6、0.8、1），利用扫描电镜（SEM）、X射线衍射（XRD）、红外光谱等分析手段对材料的结构和光学特性等进行了表征。研究了不同物质的量比的Cd_xZn_1-xS光催化剂对甲基橙（MO）、亚甲基蓝（MB）和罗丹明B（RhB）这3种染料的催化降解性能。结果表明：所制备的材料对3种染料均具有较高的催化活性，其中Cd_0.6Zn_0.4S的催化活性最高，有机污染物均在1 h内被完全降解，同时其具有极好的重复使用性，连续降解5次的降解率均在90%以上。

关键词: 溶胶-凝胶法, Cd_xZn_1-xS催化剂, 降解, 催化活性

CLC Number: 

• X703.1