二氧化钛/碳纳米管/壳聚糖薄膜的制备及对苯的降解性能  

Preparation of titanium dioxide/carbon nanotubes/chitosan film and its performance in benzene degradation

作　　者：邹俐辉[1] 张泉[1] 曾丽萍[1] 张国强[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《环境工程学报》2012年第1期270-274,共5页Chinese Journal of Environmental Engineering

基　　金：广东省产学研项目(2008B090500232);教育部科学技术研究重点项目(2009-41);教育部博士点基金资助项目(20090161110016);湖南省杰出青年科学基金项目(11EB006);湖南省环保厅科技项目(湘财建指[2010]175)

摘　　要：研究了光催化降解挥发性有机化合物过程中催化剂二氧化钛/碳纳米管/壳聚糖薄膜的制备以及该催化剂对苯的光催化性能。首先采用溶胶-凝胶法制备纳米复合材料二氧化钛/碳纳米管,然后利用壳聚糖作为交联剂,制得二氧化钛/碳纳米管/壳聚糖复合材料催化薄膜。通过傅立叶红外光谱(FT-IR)、X射线衍射(XRD)透射电镜扫描(TEM)和紫外-可见光漫反射(UV-Vis)等技术分析了复合材料薄膜的组成、结构、形貌和对光的吸收性能,然后使用该催化剂对室内常见的污染物苯进行降解,并在同样的实验条件下,使用催化剂二氧化钛(P25)/壳聚糖对苯进行降解,对两者催化性能进行对比,结果表明,二氧化钛/碳纳米管/壳聚糖对苯有更强的吸附能力和更高的催化活性。The preparation for the photocatalytic material of titanium dioxide /carbon nanotubes/ chitosan film and its performance to remove benzene were studied.First,nanocomposite titanium dioxide /carbon nanotubes was made through sol-gel method,then chitosan was used as crosslinking agent to prepare the titanium dioxide /carbon nanotubes/chitosan film.The film,of which composition,structure,morphology and the absorption performance of light was analyzed by fourier infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,transmission electron microscopy（TEM）and UV-Visible diffuse（UV-Vis）,was used to remove indoor benzene pollutant,and the comparison was carried out with the catalyst titanium dioxide（P25）/chitosan under the same experimental condition.The result showed that titanium dioxide /carbon nanotubes/chitosan had the better adsorption capacity of benzene and catalytic activity.

关 键 词：挥发性有机污染物 室内空气 二氧化钛 碳纳米管 壳聚糖 光催化 

分 类 号：X701.7[环境科学与工程—环境工程]