Catalyst loading inverse opal carbon nitride with carbon defect with titanium carbide quantum dots and preparation method of catalyst

Abstract

The invention provides a catalyst loading inverse opal carbon nitride with carbon defect with titanium carbide quantum dots and a preparation method of the catalyst. The catalyst can be well applied to photocatalytic production of H2O2. Firstly, an ordered macroporous structure (inverse opal structure) is synthesized by taking three-dimensional ordered SiO2 spheres as a hard template through a hard template method. Carbon nitride precursor dicyandiamide is poured into a photonic crystal obtained by regular arrangement of SiO2 spheres through high-temperature calcination in Ar gas, and NH4HF2 etching is used for removing the template, thereby obtaining the inverse opal carbon nitride with carbon defects. The carbon defect is introduced while the carbon nitride forms an inverse opal structure, so that the specific surface area and the carrier separation efficiency of the carbon nitride are increased. By applying the catalyst to photocatalytic production of H2O2, the invention finds thatthe catalyst can efficiently produce H2O2 in response to visible light and has better catalytic activity than pure carbon nitride or inverse opal carbon nitride with only the carbon defect.

Description

technical field [0001] The invention relates to a photocatalytic production of H 2 o 2 The catalyst and its preparation method and application belong to the field of photocatalysis. Background technique [0002] Hydrogen peroxide is a chemical with great application value in disinfection, chemical processing, environmental governance and energy batteries, but the anthraquinone method, which occupies 99% of the current synthesis market, has complex synthesis steps, a large amount of energy and raw material input, and toxic At the same time, another alternative noble metal direct synthesis method needs to convert the raw material H 2 and O 2 The mixture of the mixture has the risk of explosion, and an emerging electrochemical synthesis method also has the disadvantage of requiring a large amount of energy input. Therefore, capturing visible light at room temperature to drive semiconductors to synthesize hydrogen peroxide through oxygen and water molecules is currently the ...

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Problems solved by technology

However, too many and defect sites inside the material often become the recombination center of electrons and holes, which is not conducive to the photocatalytic reaction.

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