CdS光化学修饰介孔TiO_2及其增强的可见光催化活性（英文）  

Photochemical Modification with CdS and Enhanced Visible-light Photocatalytic Activity of Mesoporous TiO_2

作　　者：袁淑筠 孙丰强[1] 龙培英 刘波雄 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006

出　　处：《广西科学》2016年第2期167-173,共7页Guangxi Sciences

基　　金：国家自然科学基金项目(批准号:21571068)资助

摘　　要：【目的】提高介孔TiO_2材料的光催化活性。【方法】采用蒸发诱导自组装法(EISA),以四氯化钛和钛酸丁酯为钛源,嵌段共聚物P123(EO20PO70EO20)为模板剂,制备介孔TiO_2。用光化学修饰法将CdS掺进介孔TiO_2中,合成对可见光有较好响应的复合材料,并利用X射线衍射(XRD)、透射电镜(TEM)、原子吸收分光光度法(AAS)和光催化等手段对样品进行表征。【结果】XRD和TEM结果表明成功合成有序的六方介孔材料;AAS确定复合材料中Cd的含量为0.96mg/g;光催化于500 W氙灯下以2×10^(-5)mol/L次甲基蓝(MB)为模型污染物,结果显示CdS/TiO_2复合材料的可见光催化活性明显提高。【结论】光化学修饰法制备的介孔CdS/TiO_2复合材料可增强其可见光催化活性。【Objective】To improve the photocatalytic activity of mesoporous TiO_2.【Methods】Mesoporous TiO_2 was prepared by the method of evaporation-induced self-assembly(EISA),while TiCl_4 and Ti(OC_4H_9)_4 as titanium sources,and block copolymer P123(EO_(20)PO_(70)EO_(20))as the template.Using the photochemical modification technology,composite material was prepared with good response of visible light by doping CdS to its framework.The obtained samples were characterized by X-ray diffraction(XRD),transmission electronic micrograph(TEM),atomic absorption spectrophotometer(AAS)and photocatalytic.【Results】The results of XRD and TEM proved the synthesis of ordered hexagonal mesoporous materials.AAS determined the composite material content of 0.96 mg/g Cd.In 500 W xenon lamp,2×10^(-5 )mol/L methylene blue(MB)as model pollutant,the photocatalytic results showed that the photocatalytic activity of the mesoporous CdS/TiO_2 composite was further improved.【Conclusion】The mesoporous CdS/TiO_2 composite material with enhanced visible-light photocatalytic activity can be prepared by photochemical modification technique.

关 键 词：介孔CdS/TiO2 光化学 光催化 可见光EISA 

分 类 号：O643.3[理学—物理化学]