【摘要】 使用溶胶凝胶法制备了二氧化硅/二氧化钛/玻璃纤维体系复合催化膜(SiO2/TiO2/GF),研究了影响成膜的主要因素(PEG添加量、焙烧温度、溶胶特性等)的条件下SiO2/TiO2/GF的特性。采用气相甲醛对SiO2/TiO2/GF体系催化膜的光催化效率进行了评估。研究表明在n(钛酸四丁酯)∶n(水)=1∶1的时候,聚乙二醇(PEG)添加为10 g/L,当煅烧温度在500℃时候,SiO2/TiO2/GF膜光催化效率最高。在停留时间为21 s、12 s、9 s时,反应动力学常数分别为0.041 0、0.049 8和0.049 8 mol/m3.min。更多还原

【Abstract】 The SiO₂/TiO₂/GF film has been successfully synthesized by using sol-gel reaction.The photocatalytic characters of SiO₂/TiO₂/GF film have been studied in term of different factors such as concentration of PEG,temperature and so on.The photodegradation of gaseous formaldehyde has been examined to assess the efficiency of SiO₂/TiO₂/GF film.Results show that the best conditions are,r（Tetrabutyl titania/water） is 1,concentration of PEG is 10 g/L,temperature is 500 ℃.（the rate constant of Langmuir-Hinshelwood equation） is respective 0.041 0,0.049 8 and 0.049 8 mol/m³min based on different reaction time 21 s,12 s,9 s.更多还原