A hollow mesoporous defect-type tungsten trioxide nanosphere and its preparation method and application

A tungsten trioxide and defect-type technology, which is applied in the field of nanomaterials, achieves the effects of increasing separation efficiency, significantly improving photothermal catalytic performance, and broad application prospects

Active Publication Date: 2022-06-14
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
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Problems solved by technology

Therefore, CO 2 Photoreduction activity and selectivity remain a key challenge for the scientific community

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  • A hollow mesoporous defect-type tungsten trioxide nanosphere and its preparation method and application
  • A hollow mesoporous defect-type tungsten trioxide nanosphere and its preparation method and application
  • A hollow mesoporous defect-type tungsten trioxide nanosphere and its preparation method and application

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Embodiment Construction

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. The operation method without specifying the specific conditions in the following examples is usually in accordance with the conventional conditions, or in accordance with the conditions suggested by the manufacturer.

[0041] In this example, unhydrogenated WO 3 Nanomaterials are prepared by a hydrothermal polymerization method, which includes mixing and stirring the precursor well before hydrothermal treatment, and then hydrothermally at a certain temperature for a period of time to rearrange the crystal lattice of the precursor powder, and then ultrasonically dispersing it and thoroughly mixing and then centrifuging. , to make the particles finely pulverized, and then freeze-dried to obtain WO 3 prec...

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Abstract

The invention discloses a hollow mesoporous defect-type tungsten trioxide nanosphere and its preparation method and the photothermal catalytic reduction of CO 2 Application in methane production. The preparation method comprises the steps of: dissolving the tungsten precursor in glacial acetic acid to obtain a precursor solution, performing a hydrothermal reaction on the precursor solution at 160-180° C. for 16-18 hours, cooling naturally after the reaction, and supersonicating the obtained reaction solution for 12-16 hours After centrifugation, washing, drying, roasting at 500-550°C, and natural cooling to obtain tungsten trioxide powder, use H at 400-450°C 2 / Ar reduction of tungsten trioxide powder to obtain hollow mesoporous defect-type tungsten trioxide nanospheres. The hollow mesoporous defect type tungsten trioxide nanosphere is made of WO 3 Nanorods are self-assembled and stacked, and the molecular formula is WO 3‑x , wherein, 2.5<x<3, the particle size is 200-500nm. Illuminated by a full-spectrum light source, the hollow mesoporous defect-type tungsten trioxide nanospheres exhibit excellent photothermal catalytic reduction of CO 2 Methanogenic properties.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a hollow mesoporous defect type tungsten trioxide nanosphere and a preparation method and application thereof. Background technique [0002] A photocatalyst is usually a hybrid semiconductor that absorbs ultraviolet and visible light, separates photogenerated charges, provides active sites for catalytic reactions, and transfers them to the surface. Various semiconductor oxides have been widely used as photocatalysts, but the current photocatalytic materials generally only use ultraviolet light and visible light, and can hardly use the light energy in the infrared region of 40% to 50% of the solar spectrum. The efficiency is generally low, limiting the reaction efficiency. If the infrared light part of natural light can be used to cause local interface heating, increasing the effective collision in the reaction will help to reduce the activation energy of the reaction, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/02
CPCC01G41/02C01P2004/62C01P2004/34C01P2004/03C01P2004/04C01P2002/72C01P2002/85
Inventor 郭乔琪徐颖峰冯华军沈东升
Owner ZHEJIANG GONGSHANG UNIVERSITY
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