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

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.