A preparation method of a solvent-induced carbon nitride photocatalytic material morphology regulation

By controlling the morphology of carbon nitride quantum dots through solvent-induced self-assembly, the problem of photocatalyst morphology control was solved, and photocatalysts with various morphologies were prepared, improving catalytic performance and reaction selectivity, especially showing high efficiency in the degradation of tetracycline hydrochloride.

CN118767966BActive Publication Date: 2026-06-30JIANGXI MODERN POLYTECHNIC COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGXI MODERN POLYTECHNIC COLLEGE
Filing Date
2024-06-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing methods for morphology control of photocatalysts are insufficient to effectively improve catalytic performance, affecting the separation and transfer of photogenerated electron-hole pairs, and photocatalysts with different morphologies have insufficient reaction selectivity.

Method used

By using different solvent-induced self-assembly methods, the morphology of carbon nitride quantum dots was controlled to prepare photocatalysts with various morphologies, such as urchin-like shapes, one-dimensional nanonecklaces, one-dimensional nanowires, and two-dimensional nanosheets. Different crystal plane structures and surface energy levels were formed by combining solvent treatment and calcination treatment.

Benefits of technology

The controllability of photocatalyst morphology and high catalytic performance were achieved, and the light absorption capacity and activity of photocatalyst were improved, especially showing excellent catalytic effect in the degradation of tetracycline hydrochloride.

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Abstract

This invention relates to a method for preparing carbon nitride photocatalysts with solvent-induced morphology control, comprising the following steps: S1, CN dot preparation: Melamine and alkali are thoroughly ground into a mixed powder, sintered, and cooled to obtain a sintered product; the sintered product is added to high-purity water, dialyzed, the water is evaporated, and the solid powder is collected to obtain quantum dots (CN dots); S2, solvent-induced morphology control: the obtained quantum dots (CN dots) are dispersed in high-purity water; the quantum dot solution is treated with different solvents, the solid is collected, calcined, and cooled to obtain carbon nitride quantum dot photocatalysts with different morphologies. This invention cleverly utilizes different solvents to successfully induce different morphologies of quantum dots. Four different solvents were used to induce and control the morphology of four different quantum dot photocatalysts: three-dimensional sea urchin-like, one-dimensional nanonecklace, one-dimensional nanowire, and two-dimensional nanosheet.
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