水溶性染料在LaCoO_3体系中的光催化降解  

Activity for Photo-Catalytic Degradation of Water-Soluble Dyes over LaCoO_3

作　　者：傅希贤[1] 杨秋华[1] 王俊珍[1] 白树林[1] 桑丽霞[1] 

机构地区：[1]天津大学理学院,天津300072

出　　处：《中国稀土学报》2002年第6期689-691,共3页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目(59772019)

摘　　要：采用柠檬酸络合法合成了粒径为20～30nm的LaCoO3复合氧化物,并以其为光催化剂在荧光汞灯及太阳光照射下进行不同结构水溶性染料的降解脱色实验。结果表明,LaCoO3有较强的光催化活性,经光声光谱,XPS等测试分析知其活性主要与Co3+离子的d电子结构、Co-O结合能及表面氧空位等因素有关。Perovskite oxides LaCoO3 was prepared by complex method, and the size of which is 20～30 nm. Using a luminous Hg lamp or sunlight as irradiator, the degradation experiments of various watersoluble dyes were carried out in the suspension system of LaCoO3. The results show that the perovskite oxide LaCoO3 has good photocatalytic activity. Studying by the analytical technology of XPS and photoacoustic spectra, its photocatalytic activity mainly related with the factors like the delectron structure of ion Co(Ⅲ), CoO binding energy and the oxygen vacancy in surface etc.

关 键 词：水溶性染料 LaCoO3体系 光催化降解 光催化剂 镧钴复合氧化物 废水处理 染料废水 稀土 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]