Bismuth series photocatalyst, and preparation method thereof

A photocatalyst, bismuth-based technology, applied in the field of photocatalysis, can solve problems such as inability to absorb visible light, and achieve the effect of improving photocatalytic efficiency
CN102600829AInactive Publication Date: 2012-07-25CHONGQING TECH & BUSINESS UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING TECH & BUSINESS UNIV
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a bismuth series photocatalyst. The bismuth series photocatalyst has a molecular formula represented by formula (I): Nm[(BiO)2CO3] (1-m) (I), wherein m is ranged in 0.01-5%. According to the invention, a bismuth source and a nitrogen source are used as raw materials, a hydrothermal reaction is carried out on the raw materials in a water solution, and the bismuth series photocatalyst having the molecular formula represented by formula (I) is obtained. The bismuth source is bismuth citrate or bismuth citrate ammonia. In the bismuth series photocatalyst provided by the invention, N element is introduced into the crystal lattice of the (BiO)2CO3 crystal; due to the presence of the N element, the band gap of the bismuth series photocatalyst provided by the invention is reduced to 2.0-2.9eV, and the absorption spectrum is expanded to the visible region from the ultraviolet region, in this way, the bismuth series photocatalyst can be excited by the visible light, and has a high visible light catalytic activity. Furthermore, the preparation method provided by the invention is mild in reaction condition and simple in operation, and the preparation method is suitable for large scale production.
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Description

technical field

[0001] The invention relates to the technical field of photocatalysis, in particular to a bismuth-based photocatalyst and a preparation method thereof. Background technique

[0002] Environmental pollution and energy shortage are the major challenges facing human beings. Solar energy is an emerging clean energy. Using solar energy to solve global environmental and energy problems has attracted more and more attention from scholars at home and abroad. In terms of environment, photocatalytic technology uses solar energy to degrade or mineralize various pollutants in water and air; in terms of energy, photocatalytic technology can convert low-density solar energy into high-density chemical energy and electrical energy. Photocatalysis, which uses solar energy to solve energy and environmental problems, has attracted more and more attention from researchers. Photocatalysis has great application potential in purifying the environment and developing clean energy. ...

Claims

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