纳米Y_2O_3/TiO_2羧甲基纤维素(CMC)负载膜光降解偶氮染料的研究  

Photodegradation of Azo-dye by Y_2O_3/TiO_2 Loaded on Carboxymethyl Cellulose (CMC) Films

作　　者：何晓云[1] 郑曦[1] 陈日耀[1] 陈震[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2005年第3期31-34,共4页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金资助项目(A9910009)

摘　　要：以钛酸丁酯和硝酸钇为原料,采用Sol-Gel法制备Y3+掺杂TiO2纳米粒子.通过XRD、TEM等手段对纳米粒子的结构进行表征,用PL研究粒子光电性能,并用SEM方法测得羧甲基纤维素膜的形貌和厚度.以水相亚甲基蓝溶液的光催化降解反应为实验模型,考察纳米粒子CMC复合膜的光催化活性.结果表明,复合膜明显提高了染料的降解,达到90%以上,其光降解反应属于表观一级反应动力学.Nanosize TiO2, Y2O3/TiO2 particles were prepared by the Sol-Gel process. The structure was characterized by means of XRD, TEM. The photoelectric properties of the nanoparticles were studied by PL. The surface and the thickness of the CMC film were measured by SEM. Being a model reaction, the photo-catalytic degradation of methylene blue （MB） with positive charge was investigated in TiO2, Y2O3/TiO2 nanopowder composite films irradiated by ultraviolet lamp. The results revealed that the degradation orocess belonged to the first-order kinetic reaction.

关 键 词：光催化剂 复合膜 亚甲基蓝 氧化钇 

分 类 号：O643.32[理学—物理化学]