Study on the performance of g-C3N4 composite TiO2 photocatalyst

Abstract

In order to develop an efficient photocatalyst to solve the environmental pollution problem, in this work, g-C3N4 nanosheets were mixed with TiO2 by mechanical stirring method to successfully construct a binary composite photocatalyst C/T. After a series of test characterization analysis, the C/T composite photocatalyst degraded rhodamine B, and the degradation rate reached 99.4 % after 60 min of reaction. The binary composite formed a new nanoflower structure, which reduced the band gap value of the C/T composite photocatalyst to 2.20 V and promoted the separation efficiency of photogenerated electron-hole pairs and increased the number of active sites, so the photocatalytic performance of C/T was greatly enhanced. The capture measurement experiment was also carried out to determine that the degradation of pollutants by C/T mainly depended on two active substances, ·O2-and h+.