作　　者： ; ; ;

机构地区： 华南理工大学环境科学与工程学院

出　　处： 《工业催化》 2009年第8期28-33,共6页

摘　　要： 采用溶胶-凝胶法,以多壁碳纳米管为载体制备了CdS和TiO_2复合的双组分负载型半导体光催化剂。以挥发性有机污染物VOCs中的甲苯去除率作为光催化剂活性指标,通过正交实验,确定了光催化剂的最佳制备条件。结果表明,光催化剂的最佳制备条件为:活性组元,n(TiO_2):n(CdS):1:0.02,加入水的体积分数为5%,载体多壁碳纳米管的质量分数2%,450℃焙烧2 h。采用透射电镜TEM对催化剂结构进行了表征,通过BET测试分析了催化剂比表面积和孔径分布,运用X射线衍射分析了催化剂的晶型特征,利用紫外-可见吸收光谱检测了催化剂的光吸收能力和光吸收值。 Multi-walled carbon nanotubes (MWCNTs) supported CdS-TiO_2 catalysts were prepared via sol-gel method.Orthogonal experiments were designed using removal of toluene,standing for volatile organic contaminants (VOCs) ,as the index for photocatalytic activity.Effects of preparation methods and reaction condition on the catalytic activity were investigated and optimum preparation condition was obtained as follows;n(TiO_2):n(CdS) = 1:0.02,volumetric percentage of water=5% ,mass fraction of MWCNTs=2% ,calcination at 450 ℃ for 2 h.Structure of the photocatalysts was characterized by TEM, BET,XRD and UV-vis.

关 键 词： 催化剂工程 光催化 多壁碳纳米管 二氧化钛 硫化镉

领　　域： [理学] [理学] [化学工程]