A NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 production to syngas.

By designing Eu doping and nanoflower-like structures in NiAlEu-LDHs photocatalysts, the problems of electron recombination and high energy demand in the CO2 reduction process of photocatalysts are solved, achieving efficient and low-cost CO2 reduction to syngas.

CN120885227BActive Publication Date: 2026-05-26BEIJING UNIV OF CHEM TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Filing Date
2025-09-09
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing photocatalysts suffer from problems such as easy recombination of electrons and holes and high energy requirements in the light-driven CO2 reduction process, making it difficult to efficiently and stably reduce CO2 to syngas.

Method used

By employing NiAlEu-LDHs photocatalysts, an asymmetric 3d-2p-4f electronic configuration is constructed through Eu doping, thereby regulating the electronic structure. Combined with a nanoflower-like structure, this improves the efficiency of photogenerated electron-hole separation and the exposure of active sites, and reduces the band gap width to enhance the visible light response.

Benefits of technology

It achieves efficient and selective reduction of CO2 into syngas, improves photocatalytic activity and selectivity, reduces photocatalytic cost, and is suitable for mass production.

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Abstract

This invention discloses a NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 synthesis of syngas, belonging to the field of catalyst preparation technology. The NiAlEu-LDHs photocatalyst is a europium-doped layered double hydroxide prepared by a hydrothermal reaction using nickel, aluminum, and europium sources, possessing a multi-level nanoflower-like structure assembled from nanosheets. The preparation method includes the following steps: a one-step hydrothermal method is used to dissolve the nickel, aluminum, and europium sources, along with urea and ammonium fluoride, in deionized water; the solution is then transferred to a polytetrafluoroethylene-lined autoclave for hydrothermal reaction. This invention introduces europium through a one-step hydrothermal method, constructing a europium-doped nanoflower-like NiAlEu-LDHs photocatalyst. In production applications, this invention's preparation method is simple and novel, with low synthesis cost, easy mass production, and significant application value.
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