直接耐晒蓝的光催化氧化脱色研究  

Studies on photocatalytic fading for direct fast blue B_2R_L

作　　者：姚秉华[1] 杨莉[1] 杜宝中[1] 田萍[1] 余晓皎[1] 

机构地区：[1]西安理工大学应用化学系,陕西西安710048

出　　处：《纺织高校基础科学学报》2003年第3期195-199,共5页Basic Sciences Journal of Textile Universities

基　　金：陕西省教育厅科学基金资助项目(02JK141)

摘　　要：采用溶胶-凝胶-浸渍法制备了La2O3/TiO2二元复合纳米光催化剂,籍助XRD、FTIR等测试技术对La2O3/TiO2的物性进行了表征.以紫外灯为光源,研究了La2O3掺杂量、煅烧温度、溶液酸度、通气量以及辐射光源等因素对直接耐晒蓝B2RL光催化脱色的影响.结果表明:掺杂摩尔百分比w(La2O3)=1.39%,500℃煅烧2h时,可有效提高TiO2光催化活性;在pH=8.6,催化剂投加量200mg/50mL,通气量200mL/min条件下,可获得最佳脱色效果.La2O3/TiO2 coupled photocatalyst nanopowder was prepared solgelimmersion process, and the physical chemistry properties of La2O3/TiO2 were characterized with XRD and FTIR technology. The effects of La2O3 content, calcined temperature, pH values in solution, flow rate of air and radiation light on the photocatalytic fading of direct fast blue B2RL in La2O3/TiO2 powder suspension were investigated. As results, the addition of La2O3 to TiO2 greatly enhanced its photocatalytic behavior. It was found that the photocatalytic activity of La2O3/TiO2 with mole fraction w(La2O3)=1.39%, calcined at 500℃ for 2 h, is higher than that of pure TiO2 powder. Under the experimental conditions of pH=8.6, the addition content of La2O3/TiO2 200 mg/50 mL and the air flowrate 200 mL/min, the optimum fading effectives could be obtained at (20±1)℃. 

关 键 词：光催化氧化 溶胶-凝胶-浸渍法 复合光催化剂 直接耐晒蓝 

分 类 号：O643[理学—物理化学] X7[理学—化学]