Monatomic modified ultrathin zinc indium sulfide nanosheet, preparation method and application thereof

By preparing single-atom modified ultrathin indium zinc sulfide nanosheets, the problem of low reaction rate in the selective oxidation of HMF and hydrogen evolution reaction in photocatalysis was solved, achieving highly selective and efficient HMF conversion and hydrogen generation, demonstrating the stability of the catalyst and its ability to upgrade a wide range of biomass resources.

CN118162163BActive Publication Date: 2026-06-26SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2024-03-05
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing photocatalytic HMF selective oxidation and hydrogen evolution reaction rates are low, and the heterogeneous catalyst structure limits the recognition of active sites, requiring the addition of expensive, non-recyclable substances as hole sacrificial agents.

Method used

Ultrathin indium zinc sulfide nanosheets modified with single atoms were prepared by a one-step aqueous solution method. Photocatalytic reaction was carried out under visible light irradiation to improve the separation efficiency of photogenerated carriers and the adsorption and activation of HMF molecules by utilizing single-atom sites, thereby activating sulfur atom sites to promote hydrogen evolution.

Benefits of technology

It achieved highly selective conversion of HMF to 2,5-furandicarboxaldehyde and near-stoichiometric hydrogen generation, improving the catalyst's reactivity and product selectivity, and demonstrating good stability and broad biomass resource upgrading coupled with hydrogen evolution capability.

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Abstract

The application belongs to the field of photocatalysis, and particularly relates to a single-atom modified ultrathin sulfur-indium-zinc nanosheet as well as a preparation method and application thereof. The preparation method of the single-atom modified ultrathin sulfur-indium-zinc nanosheet comprises the following steps: zinc salt, indium salt, sulfur source and transition metal salt are dissolved in a mixed solution of glycerol and water according to a molar ratio of (0.1-0.4):1.5:1.5:(6-13.5), and a heating reaction is performed, the reaction temperature is 70-160 DEG C, and the reaction time is 2-24 h, so that the single-atom modified ultrathin sulfur-indium-zinc nanosheet is obtained. The single-atom modification can significantly improve the separation efficiency of photo-generated carriers, and simultaneously enhances the adsorption and activation of HMF molecules, which is beneficial to the oxidation of HMF molecules. In addition, the sulfur atom sites on the sulfur-indium-zinc can be activated to promote the evolution of hydrogen. The single-atom catalyst prepared simultaneously has high reaction activity and product selectivity for selective upgrading and coupling hydrogen evolution reactions of other biomass resources, such as selective oxidation and coupling hydrogen evolution of benzyl alcohol and furfuryl alcohol.
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