Preparation method and application of high-efficiency ultraviolet visible full-spectrum photocatalytic material

Abstract

The invention discloses a preparation method and application of a high-efficiency ultraviolet visible full-spectrum photocatalytic material and relates to a preparation method of a nano material which is doped with bromine and / or iodine and uses bismuth oxychloride as the matrix. The invention prepares the novel core-shell structured high-efficiency ultraviolet visible full-spectrum halogen-doped bismuth oxychloride photocatalytic material for the first time. The technical scheme is characterized in that the photocatalytic material has extremely high catalytic efficiency under the irradiation of a filament lamp, an iodine tungsten lamp, a daylight lamp and sunlight; the photocatalytic material has a wide catalytic degradation range and can carry out high-efficiency visible light catalytic decomposition on researched organic pollutants such as rhodamine B, methylene blue, methyl orange, 2,4,6-trichlorophenol, formaldehyde and the like; the degradation efficiency of the catalyst on the typical organic pollutant rhodamine B is up to 91% after the irradiation of sunlight for 10 minutes; the catalyst can be directly added to the paint to perform photo-absorption or degradation on formaldehyde and other harmful gases generated by interior finish and furniture; and the preparation method has the advantages of simple and convenient operation, energy saving and environment friendliness, thereby being applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of an inorganic functional material, in particular to a preparation method of a high-efficiency ultraviolet-visible full-spectrum photocatalytic material, and the application of the photocatalytic material. It belongs to the technical field of environmental functional materials. Background technique [0002] Photocatalytic technology can make full use of cheap and "green" sunlight to effectively degrade organic pollutants. This technology is an important way to solve the current global environmental degradation and energy crisis. Traditional research mainly uses TiO 2 Photodegrades various typical organic pollutants, but TiO 2 The utilization rate of sunlight is limited, it can only absorb ultraviolet rays with a wavelength less than 387nm, and the photocatalytic degradation efficiency is not high, and there is no photocatalytic activity under visible light irradiation. Since less than 4% of the light en...

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Problems solved by technology

So far, the preparation methods of bismuth oxychloride photocatalytic materials mainly include ionic liquid method, low temperature gas phase method, hydrothermal method, electrochemical deposition method, inverse microemulsion method, etc. The preparation cycle is long, the process is complicated, and the energy consumption is large. , high cost, difficult to achieve industrial production

The prepared bismuth oxychloride can only be photocatalyzed under ultraviolet light, and the energy utilization rate and photocatalytic efficiency are low, such as BiOCl (AppliedCatalysis B: Environmental 68 (2006) 125), BiOCl (Catalysis Communications 11 (2010) 460), etc.

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