Heterojunction of WO3 Particle and g‐C3N4 Nanowire for Enhanced Photocatalytic Hydrogen Evolution

Abstract

AbstractHeterojunction construction with suitable band level alignment and nanostructure formation are the effective ways to improve the photocatalytic activity. Herein, WO3/g‐C3N4 nanocomposites are synthesized by calcining the mixture of WO3 particles and g‐C3N4 nanowires at nitrogen atmosphere at 550 °C for 2 h. The composite catalysts can effectively inhibit the combination of photogenerated electron/hole pairs, promote the harvest of visible light, and increase the specific surface area, thus enhancing the photocatalytic activity of H2 evolution. The optimal photocatalytic hydrogen evolution rate of 0.10WO‐CN composite under visible light (λ>420 nm) reaches 21.64 μmol/h, which is about 7.5 times of the pure phase CN (2.86 μmol/h). Due to the synergistic effect between the interface of WO3 particles and g‐C3N4 nanowires, the photocatalytic performance of WO3/g‐C3N4 composites has been improved significantly.