| 纳米TiO2/SiO2对甲苯-SO2体系气相光催化作用的影响因素 |
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| 引用本文： | 黎娜,徐自力,于连香,王晓,李文艳,刘星娟,杜尧国.纳米TiO2/SiO2对甲苯-SO2体系气相光催化作用的影响因素[J].吉林大学学报(地球科学版),2007,37(1):153-157. |
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| 作者姓名： | 黎娜 徐自力 于连香 王晓 李文艳 刘星娟 杜尧国 |
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| 作者单位： | 吉林大学,环境与资源学院,长春,130012;吉林大学,化学学院,长春,130012 |
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| 摘 要： | 以纳米TiO2/SiO2为光催化剂、C7H8(toluene)-SO2-O2-TiO2/SiO2为重点研究体系,研究了甲苯的初始浓度、氧气含量、水蒸气含量和光强对甲苯光催化降解的影响。结果发现,甲苯的初始反应速率随其初始浓度的增加而增大,并最终趋于稳定;随着含氧量增加而不断增大,体积分数为25%时达到最大,之后逐渐减小;水蒸气的体积分数为0.4%时,甲苯降解速率最大;光强增加,甲苯增大反应速率,3.0mW/cm2时反应速率趋于定值。体系中引入SO2促进了甲苯的初步降解,却抑制反应中间产物的进一步降解;同时甲苯的存在也抑制了SO2的降解。
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| 关 键 词： | 甲苯 SO2 光催化 TiO2/SiO2 |
| 文章编号： | 1671-5888(2007)01-0153-05 |
| 修稿时间： | 2006-03-21 |
Effects of Gas-phase Photocatalytic Oxidation of C7H8 (Toluene)-SO2 on Nano-TiO2/SiO2 |
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| LI Na,XU Zi-li,YU Lian-xiang,WANG Xiao,LI Wen-yan,LIU Xing-juan,DU Yao-guo.Effects of Gas-phase Photocatalytic Oxidation of C7H8 (Toluene)-SO2 on Nano-TiO2/SiO2[J].Journal of Jilin Unviersity:Earth Science Edition,2007,37(1):153-157. |
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| Authors: | LI Na XU Zi-li YU Lian-xiang WANG Xiao LI Wen-yan LIU Xing-juan DU Yao-guo |
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| Institution: | 1, College of Environment and Resources, Jilin University, Changchun 130012, China; 2. College of Chemistry ,Jilin University ,Changchun 130012 ,China |
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| Abstract: | TiO2/SiO2 is employed as the representative semiconductor catalyst to investigate the effects of initial concentration of reactant,oxygen content,water vapor content and light intensity on the photocatalytic reaction.The reaction rate increases when increasing the initial concentration of toluene,maintained constant eventually,increases when increasing oxygen content,and then decreases after higher than 25%.When water vapor content is 0.4%,the reaction rate reaches its maximum level.The more is the light intensity,the more is the reaction rate.When reached 3.0 mW/cm2,the reaction rate is invariable.The degradation of toluene is promoted in the presence of SO2,but the degradation of intermediate products is inhibited.Meanwhile,the degradation of SO2 is also inhibited by the presence of toluene. |
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| Keywords: | toluene sulfur dioxide photocatalysis titania-silica |
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