Preparation method of graphene-like carbon nitride photocatalytic material

Abstract

The invention relates to a preparation method of a graphene-like carbon nitride photocatalyst, belonging to the technical field of preparation methods of photocatalytic materials. The method comprises the following steps of: (1) dispersing graphite type carbon nitride in 1, 3-butanediol for performing ultrasonic treatment; (2) performing centrifugal treatment on an obtained suspension to remove a precursor; and (3) evaporating the suspension obtained by centrifugation till dryness so as to obtain a solid, namely the graphene-like carbon nitride photocatalyst. Ultra-thin type graphene-like carbon nitride nano-sheets prepared by utilizing the method disclosed by the invention has good photocatalytic property and photocurrent response, and the graphene-like carbon nitride nano-sheets simultaneously show stronger adsorption capacity. The preparation method provided by the invention has the advantages of low price of raw materials, simple process and mild reaction; and furthermore, the solvent raw materials can be industrially recycled, so that the whole synthesis process is green and environment-friendly, the product cost is effectively reduced, the preparation method is suitable for industrial large-batch production, and the preparation method further has very high application prospects and using values.

Description

technical field [0001] The invention relates to a preparation method of a graphene-like carbon nitride photocatalyst, belonging to the technical field of preparation methods of photocatalytic materials. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) has a layered structure like graphite, has conjugated large π bonds, and has good chemical stability. It has been reported that it can photolyze water to produce hydrogen under visible light, and has the ability to photocatalyze the degradation of environmental pollutants, thus Rapidly becoming a research hotspot in the field of photocatalysis; g-C 3 N 4 As a high-temperature-resistant, non-metallic, non-toxic catalyst, it has good application prospects, but the study of its properties found that the monomer g-C 3 N 4 The utilization rate of light is low, and the recombination rate of electron holes is high under light conditions. Researchers use modification methods to improve g-C 3 N 4 Photocatalytic ...

AI Technical Summary

Problems solved by technology

[0002] Graphite carbon nitride (g-C 3 N 4 ) has a layered structure like graphite, has conjugated large π bonds, and has good chemical stability. It has been reported that it can photolyze water to produce hydrogen under visible light, and has the ability to photocatalyze the degradation of environmental pollutants, thus Rapidly becoming a research hotspot in the field of photocatalysis; g-C 3 N 4 As a high-temperature-resistant, non-metallic, non-toxic catalyst, it has good application prospects, but the study of its properties found that the monomer g-C 3 N 4 The utilization rate of light is low, and the recombination rate of electron holes is high under light conditions. Researchers use modification methods to improve g-C 3 N 4 Photocatalytic activity, such as transition metal doping, semiconductor recombination, dye sensitization, etc.; Inspired by graphene research, single-layer graphene has excellent photoelectric properties, because graphite-type carbon nitride has a layered structure like graphite , and the layers are connected by van der Waals force, so if it can be prepared like graphene, the g-C 3 N 4 After processing, exfoliating a single-layer or few-layer graphene-like structure carbon nitride two-dimensional material, its properties may show characteristics different from graphite-type carbon nitride

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