Photocatalyst for CO2 reduction and preparation method thereof

A photocatalyst and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, carbon monoxide, etc., can solve the problems of large impact on profit and income, secondary leakage, high cost, etc., and achieve improved photocatalytic activity and stability Effect
CN112076777AActive Publication Date: 2020-12-15HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV
Publication Date
2020-12-15

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Abstract

The invention discloses a photocatalyst for CO2 reduction and preparation method thereof. The photocatalyst disclosed by the invention is prepared by compounding g-C3N4 and transition metal carbide, calcining at a high temperature and partially oxidizing, and has a Z-shaped carrier transport characteristic, the formed Z-shaped heterojunction reduces the hole electron recombination rate, an oxidation reaction and a reduction reaction on the catalyst are separated, and the photocatalytic activity of the photocatalyst is improved. Therefore, the photocatalytic CO2 reduction efficiency and stability are improved. The specific surface area of the catalyst is large, the photo-thermal effect caused by high light absorption intensity of the catalyst enables the photocatalytic activity to be improved, products such as CO are easy to desorb on the surface of the catalyst, reuse of active sites is facilitated, and the stability of the photocatalyst is enhanced. The catalyst has a good applicationprospect in the field of photocatalytic CO2 reduction, the raw materials are cheap, the preparation method and operation are simple, and the catalyst is suitable for large-scale production.
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Description

technical field

[0001] The invention belongs to photocatalytic CO 2 Utilization field, specifically related to a CO 2 Reduced photocatalyst and method for its preparation.

[0002] technical background

[0003] CO 2 Capture and utilization has always been a hot topic in human research. CO 2 It is the culprit that causes the global warming effect, and as a C source, it can become a raw material for many energy reactions. Therefore, for CO 2 It is captured and then utilized as a resource to prepare a high-energy fuel substance, which has a very high research value.

[0004] Currently CO 2 There are three main technical solutions for the capture of CO2, namely pre-combustion capture, oxygen-enriched combustion, and post-combustion capture. These three methods are currently becoming mature. Globally, CO 2 Capture items and capture capabilities grow rapidly. However, CO 2 Capture technology solutions generally have disadvantages such as high cost, and the profit income is...

Claims

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