Iron carbide composite titanium monoxide nanoparticle photo-thermal catalyst and preparation thereof

Abstract

The invention relates to an iron carbide composite titanium monoxide nanoparticle photo-thermal catalyst and preparation thereof. The preparation comprises the steps: firstly mixing P25, PAN, DMF andferric nitrate and drying and then calcining for 4 hours at the temperature of 800-850 DEG C in an ammonia atmosphere, and taking out the sample and grinding into powder to obtain the iron carbide composite titanium monoxide nanoparticle photo-thermal catalyst. The catalyst has a wide light absorption range, high methane yield, low resistivity, rapid carrier transfer capability, high photon-generated carrier separation capability, low carrier recombination rate, good carbon dioxide reduction high cycle stability and the like and is used for photothermal catalysis of carbon dioxide to reduce methane, and has a maximum rate of 37.67 [mu] mol.g <-1 >. H <-1 >. The preparation method is simple to operate and low in cost, and the used raw materials are non-toxic and accord with the production concept of environmental protection.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a nano-particle photothermal catalyst of iron carbide compounded with titanium monoxide and its preparation. Background technique [0002] With the rapid development of the global population and the world economy, human demand for fossil energy is also increasing. However, with the increasing depletion of fossil fuels such as oil, coal, and natural gas, and climate change caused by the global greenhouse effect, the development of renewable clean energy is imminent. Chemical reduction is a key process in the earth's carbon cycle and is the development direction of future solar energy capture and storage technologies. Photosynthesis, which converts carbon dioxide into carbohydrates, sustains nearly all life on Earth. Inspired by this, researchers have attempted to develop photosynthetic simulation systems that reduce carbon dioxide into fuels and valuable chemical ...

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Problems solved by technology

[0004] One of the purposes of the present invention is to solve the photocatalytic carbon dioxide reduction caused by the limited light absorption range, few surface active sites, easy recombination of photogenerated carriers, and low conduction band position of the above-mentioned traditional Ti-based materials as photocatalytic materials. Due to the technical problems of poor performance, a nano-particle photothermal catalyst of iron carbide and titanium monoxide is provided. The catalyst has the advantages of wide light absorption range, full spectrum light absorption range, and difficult carrier recombination. Under sunlight irradiation, the highest methane production rate can reach 37.67 μmol h -1 g -1

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