Heterojunction composite material and preparation method and application thereof

By preparing heterobonding composite materials with covalent organic frameworks of nano cadmium sulfide and triazine-based covalent organic frameworks, the problem of low light absorption range and charge separation efficiency of photocatalysts is solved, and efficient photocatalytic performance and excellent hydrogen production capacity are achieved, which is suitable for the field of clean and environmental protection.

CN120421040APending Publication Date: 2025-08-05CATALYTIC TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510498525.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-21
Publication Date
2025-08-05

AI Technical Summary

Technical Problem

The existing photocatalytic technology has low light utilization efficiency, limited light absorption range of photocatalysts, and low charge carrier separation efficiency, which limits its practical application in the fields of clean energy and environmental restoration.

Method used

Nanocadmium sulfide (CdS) is compounded with triazine-based covalent organic framework (Tr-COF) to form a heterojunction structure. By reacting water as a solvent at low temperature, CdS/Tr-COF heterojunction composite materials are prepared to broaden the solar light response range and promote the separation and transfer of light-induced electrons and holes.

Benefits of technology

It improves the photocatalytic oxidation and reduction capacity of photocatalysts, improves hydrogen production efficiency, and achieves more efficient photocatalytic performance, which is suitable for the field of clean and environmental protection.

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Abstract

The invention relates to a heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the heterojunction composite material comprises the following steps: dispersing nano cadmium sulfide in water to obtain a nano cadmium sulfide dispersion liquid, then adding a triazinyl covalent organic framework, fully reacting at 75-85 DEG C, centrifuging, precipitating, washing and drying to obtain the heterojunction composite material. The narrow-band-gap semiconductor cadmium sulfide and the wide-band-gap semiconductor triazinyl covalent organic framework are compounded to form the heterojunction structure composite material photocatalyst, and the narrow-band-gap semiconductor cadmium sulfide and the wide-band-gap semiconductor triazinyl covalent organic framework interact with each other, so that the response range of sunlight is widened, separation and transfer of photo-induced electrons and holes are promoted, and the photoelectric conversion efficiency is improved. Therefore, the photocatalytic oxidation-reduction capacity of the catalyst is improved, and the photocatalytic performance of the catalyst is finally improved. The heterojunction composite material can be applied to the field of cleaning and environmental protection as a photocatalyst, and has excellent hydrogen production efficiency.
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