Carbon nitride/tungsten trioxide nano composite material and preparation method and application thereof

Abstract

The invention provides a preparation method of a carbon nitride / tungsten trioxide nano composite material. The preparation method comprises the following steps: (1) mixing and fusing deionized water and absolute ethyl alcohol, then stirring, adding sodium tungstate, stirring to dissolve at room temperature, adding a carbon nitride precursor, stirring, precipitating to obtain crystals, drying the crystals, grinding the crystals, and thus obtaining a white powder, wherein the carbon nitride precursor comprises urea and dicyandiamide; (2) calcining the white powder obtained in the step (1) to obtain a yellow solid, grinding the yellow solid, and collecting a yellow powder; (3) stirring the yellow powder obtained in the step (2) with HCl; and swashing away impurities, then filtering, drying, and grinding to obtain a yellow powder; and (4) calcining the yellow powder obtained in the step (3). The invention also provides the carbon nitride / tungsten trioxide nano composite material prepared by the method and an application thereof. The method is simple and easy to control, and friendly to the environment; the obtained nano composite material has high dispersion and high catalytic performance; and an electrode prepared from the nano composite material has high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a carbon nitride / tungsten trioxide nanocomposite material and its preparation method and application. Background technique [0002] Carbon nitride is considered to be a new type of efficient and non-toxic photocatalytic material. Because of its potential application prospects in the environment and energy, it has attracted a lot of research interest in the field of visible light photocatalysis. Highly polymerized carbon nitride (GCN) with a graphite-like phase is a semiconductor that does not contain metal elements and has good environmental compatibility. It has a two-dimensional planar structure, a large specific surface area, and easy controllable morphology. The splitting of water can efficiently convert solar energy into chemical energy. However, the high carrier recombination rate of pure carbon nitride limits its potential applications. In order t...

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Problems solved by technology

Although many semiconductor materials exhibit photoelectrochemical activity, most of them have disadvantages such as easy to be corroded by light, high carrier recombination rate, and limited bandgap width, which hinder their application in photoelectrochemistry.

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