【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.更多还原

【Abstract】 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)℃. 更多还原