Method of preparing novel carbon-nitrogen non-metallic photocatalyst according to p/n junction principle

Abstract

The invention belongs to the technical field of nanometer energy materials and particularly relates to a method of preparing a novel carbon-nitrogen non-metallic photocatalyst according to a p/n junction principle. The method comprises the steps that (1) an amine raw material and a solvent are heated to obtain a first product; (2) the first product is subjected to temperature rise and heating under inert gas protection to obtain a p-type CN photocatalyst; (3) the amine raw material, halogen ammonium salt and the solvent are mixed and heated to obtain a second product; (4) the second product issubjected to temperature rise and heating in an inert gas protection atmosphere to obtain an n-type CN photocatalyst; and (5) the p-type CN photocatalyst and the n-type CN photocatalyst are ground and mixed and then placed in a porcelain boat, the porcelain boat is placed in a tube furnace, the tube furnace is subjected to temperature rise and quenching in the inert gas protection atmosphere, andthe photocatalyst is obtained. According to the method, the novel carbon-nitrogen non-metallic photocatalyst is prepared according to the p/n junction principle, the raw materials are environmentallyfriendly, the method has the advantages of being nontoxic to the environment, low in condition requirement and high in yield, and expensive instruments and equipment are not needed.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer energy materials, and in particular relates to a method for preparing a novel carbon-nitrogen nonmetallic photocatalyst by utilizing the p / n junction principle. Background technique [0002] Two-dimensional (2D) graphene-based carbon-nitrogen photocatalysts (g~CxNy) have received extensive research attention in recent years due to their good visible light responsivity, which has the advantages of large specific surface area, non-toxicity, and low cost. However, there have been few major breakthroughs in the effect of CN photocatalysts in the field of metal-free and total water splitting in the past few decades. [0003] The inventors searched a large number of patent documents and periodical documents before conducting research on the present invention. The search results show that all CN photocatalysts are n-type structure, which is caused by their different ratio of carbon and ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned composite photocatalysts are no longer non-metallic photocatalysts, and many metal-based materials are expensive and toxic.

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