1 D CeO2/g-C3N4 type II heterojunction for visible-light-driven photocatalytic hydrogen evolution

Abstract

• One-dimensional hollow tubular CeO 2 /g-C 3 N 4 heterojunctions were prepared by electrospinning and vapor deposition. • The recombination of photogenerated electrons and holes is effectively inhibited by one-dimensional hollow tubular morphology and binary heterojunction structure. • CeO 2 /g-C 3 N 4 improves the photocatalytic hydrogen production performance and has good cycle stability. Hydrogen production by photocatalytic water splitting for hydrogen production using solar energy is considered to a relatively green technology. In this study, we prepared one-dimensional hollow tubular CeO 2 /g-C 3 N 4 materials with heterojunctions by electrospinning and vapor deposition. When the amount of melamine used in vapor deposition was 1.5 g, CeO 2 /g-C 3 N 4 composites showed the strongest photocatalytic hydrogen production activity (229.75 μmolg −1 ·h −1 ). Meanwhile, the CeO 2 /g-C 3 N 4 -1.5 g composite has good photocatalytic hydrogen production stability, and at the end of this paper, we propose a possible photocatalytic hydrogen production mechanism. It was well known that the improvement of photocatalytic hydrogen production activity was mainly on account of the regulation of its one-dimensional morphology and the formation of heterostructures. Which it significantly broadens the responsiveness of the material to visible light, promotes the separation of photogenerated electrons and holes, and improves the photocatalytic hydrogen production activity.