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中文摘要：
采用溶胶-凝胶法,制备了多壁碳纳米管（MWCNTs）/CdS/TiO2复合半导体光催化剂。通过扫描电镜（SEM）、X射线衍射（XRD）和紫外-可见吸收光谱（UV-vis）等分析方法对光催化剂进行了结构表征,并考察了在可见光照射条件下MWCNTs/CdS/TiO2对甲基橙（MO）降解的光催化性能。结果表明,MWCNTs/CdS/TiO2能有效降解甲基橙。低浓度MO降解效果比高浓度好,光催化剂投加量为1.2 g/L即可达到较好的催化效果,酸性条件有利于光催化,投加适宜浓度的H2O（2低于10 mmol/L）时会和催化剂产生协同效果,浓度过大,催化效果下降。阴离子对催化效果有抑制作用,其中PO43-的抑制作用最强。所制备的复合催化剂具有较好的实际应用价值。
英文摘要：
A cadmium sulfide（CdS）-titanium dioxide（TiO2）nanocomposite supported on multiwalled carbon nanotubes（MWCNTs）was prepared by a sol-gel method.The structures of the photocatalyst MWCNTs/CdS/TiO2 were characterized by scan electron microscopy（SEM）,X ray diffraction（XRD）and UV-vis absorption spectrum（UV-vis）techniques.The photocatalytic performance was investigated for MO decomposition.Results showed that the pH 2.6,a catalyst dosage of 1.2 g/L with the concentration of 10mmol/L H2O2,as well as a small initial dye concentration（10 mg/L）yielded optimum photocatalytic degradation performance.All chosen anions had an inhibitory effect on the decolorization of MO and the strongest inhibition resulted from PO43-.
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