复合氧化物La_2Mo_2O_9的制备及其光催化活性研究  

Preparation of Complex Metal Oxide La_2Mo_2O_9 and Its Photocatalytic Activity for Dyes Degradation

作　　者：周琰[1] 包任烈[1] 辜敏[1] 江磊[1] 贺鹤勇[1] 岳斌[1] 

机构地区：[1]复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

出　　处：《复旦学报（自然科学版）》2007年第3期275-280,共6页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目(20371013;20633030);国家重点基础研究发展计划资助项目(2003CB615807)

摘　　要：以氧化镧(La2O3)和氧化钼(MoO3)为原料,通过高温固相反应制备得到复合氧化物La2Mo2O9,并对其进行表征,紫外可见漫反射光谱表明,该氧化物具有从紫外区一直延伸到可见区600 nm的电荷转移谱带.以La2Mo2O9为光催化剂,分别选取三芳基甲烷类染料孔雀石绿、蒽醌类染料茜素红、偶氮类染料曲利本蓝为模型物进行光催化降解研究,结果表明La2Mo2O9具有较强的光催化活性,能够使三种有机染料发生一定程度的光催化降解,同时La2Mo2O9易于固液分离并回收使用.The complex metal oxide, La2M0209 , was thermally prepared by using La203 and MoO3 as the starting materials in 1 ： 2 molar ratio and the product was characterized by TG-DTA, FTIR, XRD and UV-Vis DRS. The UV-Vis DRS shows that the oxide exhibits a metal-to-oxygen charge transfer band extended from ultraviolet region to the wavelength of 600 rim in visible region, suggesting the potential photocatalytic activity of La2Mo2O9. Three typical dyes, malachite green, alizarin red, and trypan blue, which represents triarylmethane dyes, anthraquinone dyes, and azoic dyes, respectively, were chosen as model comlmunds to investigate the photocatalytic activity of La2Mo2O9. The results indicate that the three dyes can be photocatalytically degraded by La2Mo2O9 to some extent. Furthermore, the complex metal oxide can be easily recycled from the suspension and reused.

关 键 词：复合氧化物 光催化 有机染料 降解 固液分离 

分 类 号：O614[理学—无机化学]