P-n heterojunction type visible light catalyst B4C/TiO2 and preparation method thereof

The invention discloses a p-n heterojunction type visible light catalyst B4C/TiO2 and a preparation method thereof. The p-n heterojunction type visible light catalyst B4C/TiO2 is composed of B4C and TiO2, wherein the mass ratio of the B4C to the TiO2 ranges from 1:21 to 1:2. The preparation method of the p-n heterojunction type visible light catalyst B4C/TiO2 comprises the following steps: (a) purifying commercially available B4C; (b) preparing B4C/TiO2 by the purified commercially available B4C and tetrabutyl titanate under a hydrothermal condition, wherein the mass ratio of the B4C to the TiO2 ranges from 1:21 to 1:2 based on the calculating ratio that 1 mol of tetrabutyl titanate generates 1 mol of TiO2; and (c) washing a product prepared by the step (b) and separating to obtain the B4C/TiO2; and drying and milling for later use. According to the p-n heterojunction type visible light catalyst B4C/TiO2 and the preparation method thereof, the solar energy utilization efficiency of a wide ...