Preparation method of CdS/g-C3N4 dual-nanosheet composite photocatalyst

Abstract

The invention provides a preparation method of a CdS/g-C3N4 dual-nanosheet composite photocatalyst. The method comprises, through a gas template method, mixing and grinding a gas template and carbon nitride precursor to sinter within one step in inert atmosphere to obtain a g-C3N4 nanosheet, then adding the prepared g-C3N4 nanosheet into diethylenetriamine (DETA) solution containing cadmium chloride hemihydrate (CdCl2*2.5H2) and powdered sulfur (S) to react under oil bath heating to prepare a CdS/g-C3N4 material in a special structure, namely, a dual-nanosheet structure. The preparation methodof the CdS/g-C3N4 dual-nanosheet composite photocatalyst applies a semiconductor compositing method; when applied to photocatalytic H2O2 production, CdS/g-C3N4 dual-nanosheets can be highly effectivein catalytic activity effectively improve the photocatalytic activity of g-C3N4 nanosheets as well as effectively weaken photo-corrosion of CdS, thereby having a good application prospect in the photocatalytic fields such as photocatalytic hydrogen production, CO2 reduction and organic pollutant degradation.

Description

technical field [0001] The invention relates to a photocatalytic material capable of efficiently preparing hydrogen peroxide, belonging to the field of photocatalysis. Background technique [0002] Hydrogen peroxide is a clean, environment-friendly oxidant, and only water is used as a by-product in the reaction. It is widely used in industrial organic synthesis, pulp bleaching, wastewater treatment and sterilization. At the same time, hydrogen peroxide is also considered to be a new generation of clean energy. At present, the industrial production of hydrogen peroxide is mainly based on the anthraquinone method, which requires multiple hydrogenation and oxidation steps, consumes a lot of energy and pollutes the environment. Some researchers use hydrogen (H 2 ) and oxygen (O 2 ) directly prepare hydrogen peroxide under the catalysis of palladium (Pd) or gold-palladium alloy (Au-Pd), while hydrogen / oxygen (H 2 / O 2 ) mixed gas is prone to explosion. Therefore, developing ...

AI Technical Summary

Problems solved by technology

As a way to work with g-C 3 N 4 Composite narrow-bandgap semiconductor material, cadmium sulfide (CdS) has a negative reduction potential and strong reduction ability, but due to the narrow

Images