Preparation of carbon-coated brookite@anatase TiO2 heterophase junction nanocable with enhanced photocatalytic performance
One-dimension TiO2@C nanocable with the heterophase junction has been successfully fabricated by coating the brookite@anatase TiO2 with a thin layer of hydrothermal carbon (HTC). Compared with anatase TiO2, the biphase brookite@anatase structure can reduce the recombination rate of excited electron/hole pairs of TiO2. The HTC coating not only enhances the adsorption capability of the TiO2 catalyst for organic pollutants but also facilitates the photogenerated electrons transfer to further increase its photocatalytic acitivity. Therfore, compared with the anatase TiO2, brookite@anatase TiO2, and TiO2@C, the brookite@anatase TiO2@C shows the highest photocatalytic activity for photodegradation tetracycline (TC) under the irradiation of UV-visible light. Moreover, •O2 has been proved to be the predominant active species for the photodegradation of TC, and the photocatalytic mechanism of the brookite@anatase TiO2@C nanocable has also been proposed.