| 碳纳米管/二氧化钛/壳聚糖催化薄膜光催化活性及苯降解机理 |
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| 引用本文： | 曾丽萍,张泉,张国强. 碳纳米管/二氧化钛/壳聚糖催化薄膜光催化活性及苯降解机理[J]. 环境工程学报, 2013, 7(4): 1465-1471 |
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| 作者姓名： | 曾丽萍 张泉 张国强 |
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| 作者单位： | 湖南大学土木工程学院,长沙,410082 |
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| 基金项目： | 广东省产学研项目(2008B090500232); 教育部重点项目(2009-41);教育部博士点基金(20090161110016); 湖南省杰青(11EB006); 湖南省环保厅项目(湘财建指[2010]175) |
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| 摘 要： | 通过X-射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)和紫外可见光漫反射谱(UV-vis)对碳纳米管/二氧化钛/壳聚糖复合薄膜的晶体结构和形貌进行表征,以室内空气典型污染物气相苯为模型反应物,研究碳纳米管/二氧化钛/壳聚糖催化薄膜的光催化活性及其对苯的光降解机理。结果表明,制备的碳纳米管/二氧化钛/壳聚糖催化薄膜所具有的良好催化活性归功于碳纳米管、二氧化钛和壳聚糖三者的协调效应;气相苯光降解产生的主要中间产物是乙酸乙酯和十一烷,以及少量的丙烯醛、4-羰基-甲基-苯乙酮、十二烷烃、2,4,-二叔丁基苯酚、二十一烷烃。根据红外光谱分析与GC/MS分析结果,进一步提出了气相苯的降解机理过程。
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| 关 键 词： | 光催化 二氧化钛 碳纳米管 壳聚糖 气相苯 |
| 收稿时间： | 2012-04-06 |
| 修稿时间： | 2012-05-05 |
Photocatalytic degradation activity and mechanism of CNTs/TiO2/CS Film of gas phase benzene |
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| Zeng Liping,Zhang Quan and Zhang Guoqiang. Photocatalytic degradation activity and mechanism of CNTs/TiO2/CS Film of gas phase benzene[J]. Techniques and Equipment for Environmental Pollution Control, 2013, 7(4): 1465-1471 |
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| Authors: | Zeng Liping Zhang Quan Zhang Guoqiang |
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| Affiliation: | College of Civil Engineering, Hunan University, Changsha 410082, China;College of Civil Engineering, Hunan University, Changsha 410082, China;College of Civil Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | The composite film of carbon nano-tubes/TiO2/chitosan (CNTs/TiO2/CS) was fabricated and characterized by XRD, SEM, TEM and UV-vis. The photocatalytic degradation ability and mechanism of CNTs/TiO2/CS film on gaseous benzene were investigated. The improved photocatalytic degradation ability was achieved due to the synergy of CNTs, TiO2, and chitosan. The intermediates of the photocatalytic degradation were investigated by FT-IR and GC/MS, of which ethyl acetate and hendecene were two major products and minor intermediate products were acrolein 4-carbonyl-methyl-acetophenone, 12-alkane, 2,4 di tert butylphenol, 21-alkane. According to the analysis data of FT-IR and GC/MS, the photocatalytic degradation mechanism of the composite film was illuminated. |
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| Keywords: | photocatalysis TiO2 carbon nano-tubes chitosan benzene |
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