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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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多壁碳纳米管负载TiO2的光催化脱硝性能
DOI: 10.1016/S1872-2067(12)60705-0, PP. 66-77
Keywords: 多壁碳纳米管,二氧化钛,光催化,脱硝,烟气
Abstract:
？采用溶胶凝胶法制备了多壁碳纳米管负载TiO2（MWCNTs/TiO2），并利用透射电镜、X射线光电子能谱、X射线衍射和紫外-可见漫反射光谱对样品进行了表征。结果表明，MWCNTs/TiO2晶型以锐钛矿为主，MWCNTs的引入会限制TiO2晶粒的生长。另外，MWCNTs/TiO2的光吸收边向长波区域偏移。针对模拟烟气，在固定床光催化反应器中对采用涂覆处理的MWCNTs/TiO2的光催化脱硝性能进行了实验研究。结果表明，NO初始浓度较低时，光催化脱硝效率较高，SO2的存在可抑制光催化脱硝过程，而O2及H2O则有促进作用。在最佳实验条件（73mg/m3NO，8%O2，5%H2O）下，光催化脱硝效率可达46%。提出了光催化脱硝反应机理。
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