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CdS-TiO2/MWCNTs结构表征及其光催化性能
引用本文:杨岳,黄碧纯,叶代启,陈晓珊. CdS-TiO2/MWCNTs结构表征及其光催化性能[J]. 环境污染治理技术与设备, 2010, 0(2): 398-402
作者姓名:杨岳  黄碧纯  叶代启  陈晓珊
作者单位:华南理工大学环境科学与工程学院,广州510006
基金项目:国家高技术研究发展计划(863)项目(2006AA06A310);广东省科技计划项目(2008B050100007,2009B050900005);污染控制与生态修复广东省普通高等学校重点实验室开放基金资助
摘    要:采用溶胶-凝胶法,制备了多壁碳纳米管(MWCNTs)负载的双组分复合半导体光催化剂CdS-TiO2/MWCNTs。通过透射电镜(TEM)、比表面分析(BET)、X射线衍射(XRD)和紫外-可见吸收光谱(UV-vis)等分析方法对光催化剂进行了结构表征,并考察了CdS-TiO2/MWCNTs对甲苯降解的光催化性能。结果表明:纳米活性粒子CdS-TiO2均匀负载于MWCNTs上,比表面积、光吸收阈值和强度增大,活性粒子间以及活性粒子与载体之间具有协同作用,有利于光催化性能的提高,CdS-TiO2/MWCNTs在主波长为254 nm紫外光照射下对甲苯的降解效果较好,去除率可达55.3%。

关 键 词:光催化  多壁碳纳米管  二氧化钛  硫化镉  甲苯

Characterization and photocatalytic performance of CdS-TiO2/MWCNTs
Abstract:A cadmium sulfide(CdS)-titanium dioxide(TiO2) nanocomposite supported on multi-walled carbon nanotubes(MWCNTs) was prepared by a sol-gel method.The structures of the photocatalyst CdS-TiO2/MWCNTs were characterized by transmission electron microscopy(TEM),brunaure-emmett-teller(BET),X-ray diffraction(XRD) and UV-visible absorption spectrum(UV-vis) techniques.And the photocatalytic performance was investigated for toluene decomposition.The results showed that the CdS-TiO2 nanocomposites were highly dispersed on the sidewall of MWCNTs,with a greater BET surface area and an extended light adsorption threshold and intensity.The presence of CdS and MWCNTs played a great role in improving photocatalytic properties of TiO2.Under the irradiation UV light at the wavelength of 254 nm,the removal efficiency of toluene decomposition on CdS-TiO2/MWCNTs was up to 55.3%.
Keywords:photocatalysis MWCNTs TiO2 CdS toluene
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