RuO_2TiO_2复合光催化剂的制备及性能研究  

A Study on Preparation and Characteristic of RuO_2/TiO_2 Coupled Photocatalyst

作　　者：姚秉华[1] 王理明[1] 余晓皎[1] 杨国农[1] 赵高扬[1] 郑怀礼[2] 

机构地区：[1]西安理工大学应用化学系,陕西西安710048 [2]重庆大学化学化工学院,重庆400044

出　　处：《光谱学与光谱分析》2005年第6期934-937,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50072018);陕西省教育厅科学研究基金(02JK141)资助项目

摘　　要：采用溶胶 凝胶 浸渍法制备了RuO2 TiO2 复合光催化剂,以紫外灯为光源,直接耐晒黑G溶液的光催化降解为模型反应,研究了RuO2 TiO2 的光催化性能。结果表明:掺杂量ω(RuO2 )为0 16 %、煅烧温度5 0 0℃、催化剂投加量为5 0 0g·L- 1 时,RuO2 TiO2 复合光催化剂催化活性最高。直接耐晒黑G降解反应遵从Langmuir Hinshelwood动力学模型,测得反应速率常数为4 94×10 - 3mmol(L·min) - 1 和吸附常数14 2L·mmol- 1 。RuO2/TiO2 coupled photocatalyst was prepared by sol-gel-dipping method. Being a model reaction, the photocatalytic degradation of direct fast black G was investigated in RuO2/TiO2 powder suspension irradiated by UV-lamp. The results showed that the addition of RuO2 to TiO2 greatly enhanced its photocatalytic activity, and the optimum dipped content of RuO2 was 0. 16%, the optimum value of the calcinations temperature and the addition of RuO2 /TiO2 powder were 500 degrees C and 5. 00 g.L-1, respectively. The photocatalytic degradation of direct fast black G was experimentally demonstrated to follow the Langmuir-Hinshelwood kinetic model, and the adsorption constant ( 14.22 L.mmol(-1)) and the reaction rate constant [4.94 x 10(-3) mmol(L.min)(-1)] were determined, respectively.

关 键 词：光催化反应 光催化剂 二氧化钛 染料 直接耐晒黑G 

分 类 号：X783[环境科学与工程—环境工程]