Preparation and Photocatalytic Performance of MWCNTsTiO2 Nanocomposites for Degradation of Aqueous Substrate

Abstract EN

In this study, multiwalled carbon nanotubes (MWCNTs)/TiO2 nanocomposites were obtained by constant volumetric wet impregnation processes.

The prepared catalysts were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).

The effect of reaction conditions on photocatalytic performance of the catalysts was investigated by the degradation of methyl orange (MO) under UV irradiation, in a new type of reactor with unique structure.

The results showed that the prepared nanocomposite exhibited higher MO degradation efficiency than that of pure nano-TiO2.

Besides, in batch experiments of influencing factors, including ionic strength, oxidant amount, and response times, the presence of H2O2 would contribute to increasing the MO degradation rate of MWCNTs/TiO2 samples.

Ionic concentration and long reaction times are adverse to the MO degradation in the processes.