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。
The SiO2/TiO2/CF 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 fommldchyde has been examined to assess the efficiency of SiO2/TiO2/GF film. Resohs show that the best conditions are , r(Tetrabutyl tltania/water) is 1, concentration of PEG is 10 g/L, temperature is 500 T:o (the rate constant of Langmuir- Hinshelwood equation) is respective 0.041 0, 0.049 8 and 0.049 8 mol/m^3 min based on different reaction time 21 s,12 s,9 s.
出处
《当代化工》
CAS
2006年第1期22-25,52,共5页
Contemporary Chemical Industry