P-doped g-C3N4/MoP catalyst for hydrogen production through water photolysis, and preparation method thereof

Abstract

The invention discloses a P-doped g-C3N4/MoP photocatalyst with excellent performance of producing hydrogen through water photolysis, and a preparation method thereof, and belongs to the technical field of photocatalysis. According to the preparation method disclosed by the invention, P doping and MoP modification of g-C3N4 are realized by adopting a high-energy ball milling method, and the P-doped g-C3N4/MoP photocatalyst is prepared. The preparation process is simple and rapid, no solvent is needed, and large-scale production is easy. Due to the synergistic effect of P doping, P-doped g-C3N4 and Mo-N chemical bonds of a MoP interface and a Schottky barrier, under the condition of no noble metal cocatalyst, the water splitting hydrogen production rate of the photocatalyst reaches 4700-4900 [mu] mol.g<-1>. H<-1>, and the water splitting hydrogen production rate after continuous 5 times of cyclic use within 10 hours is kept to be 90% or above of the first use rate.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a P-doped g-C with excellent performance 3 N 4 / MoP photocatalyst for hydrogen production from water splitting and its preparation. Background technique [0002] Photocatalytic water splitting for hydrogen production can convert inexhaustible solar energy into hydrogen energy, which is an effective way to alleviate energy crisis and environmental pollution, and has significant social, economic and ecological benefits. However, the current photocatalytic water splitting hydrogen production technology is still in the laboratory stage, mainly due to the lack of high-efficiency photocatalysts and their mass preparation processes. As a promising high-efficiency photocatalytic water splitting hydrogen production catalyst, it needs to have: (1) a narrow band gap that can efficiently utilize visible light; (2) a high conduction band potential that ensures a high photogenerated e...

AI Technical Summary

Problems solved by technology

[0004] So far, the P-doped g-C reported in the literature 3 N 4 The method is mainly thermal sintering method or chemical method requiring solvent, the preparation temperature is high, the time is long, the environment is polluted and the yield of catalyst is low, it is difficult to realize large-scale industrial production; construct g-C 3 N 4 Most of the methods of Schottky heterojunction are physical and mechanical hybrid methods such as ultrasonic, stirring or low-speed grinding. It is difficult to establish a tight interfacial connection at the heterojunction interface, resulting in a low migration rate of photogenerated carriers, which limits photocatalysis. performance improvement

However, no P-doped g-C with close chemical bonds has been constructed by high-energy ball milling. 3 N 4 Report on / MoP Schottky Heterojunction Photocatalyst

Images