碳纳米管/二氧化钛对水溶液中甲基橙的声光催化降解

Sonophotocatalytic degradation of methyl orange by carbon nanotube/TiO2 in aqueous solutions.

作者信息

Wang Shuo, Gong Qianming, Liang Ji

机构信息

Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Ultrason Sonochem. 2009 Feb;16(2):205-8. doi: 10.1016/j.ultsonch.2008.08.002. Epub 2008 Aug 15.

DOI:10.1016/j.ultsonch.2008.08.002

PMID:18799343

Abstract

In this study, carbon nanotubes (CNTs)/TiO2 composite were prepared and the sonophotocatalytic activity of CNTs/TiO2 nanoparticles was investigated, in which methyl orange (MO) was chosen as an object. The results indicate that the photocatalytic efficiency of CNTs/TiO2 remarkable increases in the presence of ultrasound, and the sonophotocatalysis process followed a first-order kinetics. The kinetic constant of CNTs/TiO2 for the MO degradation is 2.2 times higher than that of P25, which indicated that the sonophotocatalytic ability of CNTs/TiO2 is obviously higher than P25 powder.

摘要

在本研究中，制备了碳纳米管（CNTs）/二氧化钛（TiO₂）复合材料，并以甲基橙（MO）为对象研究了CNTs/TiO₂纳米颗粒的声光催化活性。结果表明，在超声存在下，CNTs/TiO₂的光催化效率显著提高，且声光催化过程遵循一级动力学。CNTs/TiO₂降解MO的动力学常数比P25高2.2倍，这表明CNTs/TiO₂的声光催化能力明显高于P25粉末。