A sea urchin-like Nb2C MXene / W 18 O 49 Photothermal material and its preparation method and application

CN118904372BActive Publication Date: 2025-09-23SHAANXI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202410916273.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-09-23
Estimated Expiration
2044-07-09

AI Technical Summary

Technical Problem

Existing W18O49 nanoparticles have low photocatalytic activity, poor CO2 reduction yield and selectivity, and cannot effectively convert carbon dioxide under visible light and near-infrared light irradiation.

Method used

By preparing a sea urchin-shaped Nb2C MXene/W18O49 heterojunction photothermal material, the suspension was irradiated with ultraviolet light to self-assemble into a Nb2C MXene and W18O49 heterojunction, maintaining the layered structure of MXene and distributing positive and negative charges on the interface to form an efficient photothermal catalyst.

Benefits of technology

The activity and selectivity of photocatalytic reduction of CO2 have been improved, especially under photothermal conditions, the yield and selectivity of CO2 to methane have been significantly improved, realizing the process of efficient photothermal catalytic reduction of CO2 to methane.

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Abstract

The present invention provides a sea urchin-shaped Nb2C MXene / W 18 O 49 Photothermal material and its preparation method and application. The preparation method comprises: step 1, dispersing Nb2C MXene powder in ethanol, ultrasonicating, and obtaining suspension A; step 2, 18 O 49 Disperse in ethanol and ultrasonicate to obtain suspension B; Step 3, irradiate the obtained suspension A and suspension B with ultraviolet light respectively under stirring, then add suspension A to suspension B, irradiate the obtained mixed suspension with ultraviolet light, wash and dry the obtained solid product to obtain sea urchin-shaped Nb2C MXene / W 18 O 49 Heterojunction photocatalyst. The sea urchin-shaped Nb2CMXene / W 18 O 49 The LSPR effect of heterojunction storage of electrons and holes and the sea urchin-like ability to rapidly adsorb CO2 synergistically enhance the reduction activity and selectivity of photothermal catalytic reduction of CO2 and hydrogenation to produce methane.
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Citation Information

Patent Citations

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