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.
La2O3/TiO2 coupled photocatalyst nanopowder was prepared solgelimmersion process, and the physical chemistry properties of La2O3/TiO2 were characterized with XRD and FTIR technology. The effects of La2O3 content, calcined temperature, pH values in solution, flow rate of air and radiation light on the photocatalytic fading of direct fast blue B2RL in La2O3/TiO2 powder suspension were investigated. As results, the addition of La2O3 to TiO2 greatly enhanced its photocatalytic behavior. It was found that the photocatalytic activity of La2O3/TiO2 with mole fraction w(La2O3)=1.39%, calcined at 500℃ for 2 h, is higher than that of pure TiO2 powder. Under the experimental conditions of pH=8.6, the addition content of La2O3/TiO2 200 mg/50 mL and the air flowrate 200 mL/min, the optimum fading effectives could be obtained at (20±1)℃.
出处
《纺织高校基础科学学报》
CAS
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)
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
photocatalytic oxidation
sol-gel-impregnation method
coupled photocatalyst
direct fast blue B_2R_L
