环境工程学报2009，Vol.3Issue(12)：2129-2132,4.
多壁碳纳米管结构对复合光催化剂催化效果的影响
Effects of the structure of multi-wall carbon nanotubes on photocatalytic efficiency of composite photocatalysts
摘要
Abstract
The composite photocatalysts (TiOJMWCNTs) of TiO_2 nano-particles attached on mutil-walled carbon nanotubes were prepared by the sol-gel method. Using azo dyes methyl orange as the goal pollutant,the photocatalytic degradation experiments were carried out on the self-made photoreactor. The paper mainly investi-gated the effects of different tube diameters and length of mutil-walled carbon nanotubes on the photocatalytic effi-ciency of the composite photocatalysts under the same concentration of methyl orange ( C_0 ). The results of kinet-ic study showed that: the degradation reaction could be expressed by first-order reaction kinetic model,and the reaction rate constant(k) increased with the increase of tube diameter and length of mutil-walled carbon nano-tubes. Compared with that of nano-TiO_2,the degradation rate of the composite photocatalyst for methyl orange was enhanced by 6%～18%,and the reaction rate constant was 1.19～2. 11 times of that of nano-TiO_2. Using the composite photocatalyst,the photodegradation solution of methyl orange can be separated better. After the static sedimentation equilibrium was reached at 60 min,the residual turbidity was 8.5 NTU and decreased by 90.6%.关键词
多壁碳纳米管/复合光催化剂/甲基橙/反应动力学Key words
mutil-walled carbon nanotubes/composite photocatalysts/methyl orange/reaction kinetics分类
资源环境引用本文复制引用
张伟,施周,张骅,徐舜开..多壁碳纳米管结构对复合光催化剂催化效果的影响[J].环境工程学报,2009,3(12):2129-2132,4.基金项目
湖南省自然科学基金(08JJ3103) （08JJ3103）
国家自然科学基金资助项目(50778065) （50778065）
欧盟国际合作项目ASEM Water Net (PL510897) （PL510897）
