纳米氧化锌晶体的制备与光催化性质  

Preparation of Nanostructured Crystalline ZnO and Its Photocatalytic Properties

作　　者：尚汴卿[1] 陆兆仁[1] 袁琴华[1] 

机构地区：[1]东华大学化学与化工学院,上海200051

出　　处：《东华大学学报（自然科学版）》2004年第5期29-33,共5页Journal of Donghua University(Natural Science)

基　　金：国家863项目资助(批号:863-2-2-2-6)

摘　　要：以硝酸锌和改性明胶为原料采用溶胶-凝胶法制备纳米晶体氧化锌,透射电镜和X-射线衍射测试表明其平均粒径约20nm。用稀甲基橙水溶液分别在紫外灯和太阳光照射下测试研究其光催化活性能。试验结果表明,此反应为一级反应,表观速率常数与甲基橙初浓度、催化剂浓度及吸收光强度有关。Nanostructured crystalline ZnO was prepared with zinc nitrate and modified gelatin by the solgel method. Transmission electron microscope and X-ray diffraction measurements showed that its average particle size was about 20 nm. Its photocatalytic activity was studied in dilute methyl orange solution both under UV-lamp radiation and under sunlight, This photocatalytic reaction is first order. Apparent rate constant k is dependent on original concentration of methyl orange, the concentration of catalyst and absorbed intensity of radiation I_(abs).

关 键 词：纳米ZNO 溶胶凝胶法 光催化反应 

分 类 号：TQ132.4[化学工程—无机化工]