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Sonophotocatalytic degradation of methyl orange by carbon nanotube/TiO2 in aqueous solutions
Shuo Wang1, Qianming Gong, Ji Liang
1Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. wangshuo04@mails.tsinghua.edu.cn
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.
