【作者】 苏文悦； 陈亦琳； 付贤智； 魏可镁；

【Author】 SU Wenyue, CHEN Yilin, FU Xianzhi, WEI Kemei(Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002)

【机构】 福州大学光催化研究所；

【摘要】 采用sol-gel法制备了一系列SO₂^2-/TiO₂-SiO₂催化剂,研究了添加SiO₂对SO₂^2-/TiO₂超强酸样品的晶相结构,比表面积、酸性、氧吸附性能和光催化降解溴代甲烷反应性能的影响。实验结果表明,SO₂^2-/TiO₂体系中引入SiO₂使催化剂的比表面积和氧吸附量增加,导致光催化降解溴代甲烷的活性和溴代甲烷的矿化率明显提高。与SO₂^2-/TiO₂相比,SO₂^2-/TiO₂-SiO₂催化剂的酸强度略有降低、反应物中水蒸汽对催化剂活性的负面影响增加。更多还原

【Abstract】 A series of SO42/TiO2-SiO2 catalysts with different content of SiO2 were prepared by sol-gel method. The effect of adding SiO2 on the crystal structure, specific surface area, oxygen adsorption, acidity of SO42/TiO2 catalyst and its photocatalytic property for degradation of bromomethane was studied. The results showed that the specific surface area and amount of oxygen adsorption of catalyst were increased by addition of SiO2, leading to the obvious increase on photocatalytic activity of SO42/TiO2-SiO2 catalysts and mineralization ratio of bromomethane. Comparing with SO42/TiO2, the acidic strength and anti-moisture ability of SO42/TiO2-SiO2 catalyst were decreased.更多还原