A layered bimetallic sulfide nanomaterial and its preparation method and application

By preparing layered bimetallic sulfide nanomaterials Cu2MoS4 nanosheets, the problem of low CO2 reduction activity in the existing technology was solved, and efficient photocatalytic CO2 reduction under visible light was achieved. The products included C1 and C2 products, showing excellent catalytic performance and stability.

CN116899593BActive Publication Date: 2025-09-26LANZHOU UNIV
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Patent Information

Application Number
CN202310850759.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-11
Publication Date
2025-09-26
Estimated Expiration
2043-07-11

AI Technical Summary

Technical Problem

In the existing semiconductor photocatalytic CO2 reduction reaction, the photocatalytic activity of carbon dioxide reduction is low. It is necessary to design photocatalysts with strong light absorption ability, fast carrier separation efficiency and rich active sites to improve the CO2 reduction performance.

Method used

Layered bimetallic sulfide nanomaterial Cu2MoS4 nanosheets are prepared by a solvothermal method and have a two-dimensional structure with a thickness of 20-30nm, a lateral size of 1-2μm, and a longitudinal size of 1-2μm. The photocatalytic activity is improved by utilizing its large specific surface area and bimetallic sites.

Benefits of technology

Efficient photocatalytic CO2 reduction was achieved under visible light conditions, and the products included not only the C1 product CO, but also the C2 product C2H4, showing excellent photocatalytic performance and repeatability, and increasing the production of CO and C2H4.

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Abstract

The present invention discloses a layered bimetallic sulfide nanomaterial, a preparation method and an application thereof, and belongs to the field of nanomaterial technology. The layered bimetallic sulfide nanomaterial provided by the present invention is a two-dimensional layered nanosheet composed of Cu2MoS4, which is prepared by a simple solvent method. The preparation process is inexpensive and the reaction conditions are mild. Under visible light conditions, the layered bimetallic sulfide nanomaterial produces not only the C1 product CO but also the C2 product C2H4 when photocatalytically reducing CO2. The CO yield of the layered bimetallic sulfide nanomaterial is higher than that of Cu2S / MoS2 heterojunction, Cu2S and MoS2. When Cu2S / MoS2 heterojunction, Cu2S and MoS2 are used for photocatalytic CO2 reduction, the products do not contain C2H4, indicating that the layered bimetallic sulfide nanomaterial has excellent photocatalytic performance.
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