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Bismuth oxyiodide photocatalyst and preparation method and application thereof

A photocatalyst, bismuth iodide technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of low device requirements, simple preparation method and high catalytic efficiency

Inactive Publication Date: 2019-08-30
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the photocatalytic efficiency of BiOI reported so far needs to be further improved.

Method used

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  • Bismuth oxyiodide photocatalyst and preparation method and application thereof
  • Bismuth oxyiodide photocatalyst and preparation method and application thereof

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Effect test

Embodiment 1

[0027] The preparation method of a kind of bismuth oxyiodide photocatalyst as the embodiment of the present invention, described method comprises the following steps:

[0028] (1) Add 1mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20ml of ethylene glycol to obtain A solution, and 1mmol NaI was dissolved in 20ml of methanol to obtain B solution;

[0029] (2) Mix and stir solution A and solution B for 2 hours to disperse evenly, pour into an autoclave, react at 160°C for 8 hours, cool down to room temperature naturally, take out and centrifuge to obtain solid C;

[0030] (3) Wash the solid C three times with ethanol and pure water successively, dry it in vacuum at 60° C., and grind the obtained product to obtain a powdery solid C;

[0031] (4) Put the powdery solid C under ultraviolet light and irradiate it for 12h to obtain bismuth oxyiodide photocatalyst (BiOI-OV 12 ).

Embodiment 2

[0033] As the preparation method of a kind of bismuth oxyiodide photocatalyst of the embodiment of the present invention, the only difference between this embodiment and embodiment 1 is: the time of ultraviolet light irradiation is 24h in the step (4), obtains bismuth oxyiodide photocatalyst ( BiOI-OV 24 ).

Embodiment 3

[0035] As the preparation method of a kind of bismuth oxyiodide photocatalyst of the embodiment of the present invention, the only difference between this embodiment and embodiment 1 is: the time of ultraviolet light irradiation is 36h in the step (4), obtains bismuth oxyiodide photocatalyst ( BiOI-OV 36 ).

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Abstract

The invention provides a bismuth oxyiodide photocatalyst and a preparation method and application thereof. The preparation method comprises the following methods: (1) dissolving bismuth salt in ethylene glycol to obtain a solution A, and dissolving iodide salt in methanol to obtain a solution B; (2) uniformly mixing and dispersing the solution A and the solution B, placing the mixture in a closedcontainer to react at 140-180 DEG C for 6-10 hours, and conducting cooling and separating to obtain a solid C; (3) alternately washing the solid C with an organic solvent and water, and conducting drying to prepare a powdery solid C; and (4) irradiating the powdery solid C under ultraviolet light to obtain the bismuth oxyiodide photocatalyst. The preparation method combines hydrothermal synthesisreaction in the closed container and irradiation under ultraviolet light to prepare the bismuth oxyiodide photocatalyst, and has the advantages of simple preparation method, low cost, no addition of any organic solvent, low reaction temperature, low requirement on devices, safety and environmental protection. The bismuth oxyiodide photocatalyst prepared by the method has more oxygen defects and high catalytic efficiency.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer photocatalytic materials, and in particular relates to a bismuth oxyiodide photocatalyst and a preparation method and application thereof. Background technique [0002] With the development of the economy, the energy crisis and environmental pollution problems are becoming more and more serious. The photocatalytic technology driven by sunlight can directly oxidize organic pollutants into CO 2 、H 2 Inorganic small molecules such as O have received extensive attention. Among visible light semiconductor catalysts, bismuth oxyiodide (BiOI) not only has a unique ternary structure, but also has a narrow energy band gap (1.6-1.9eV), which enables photogenerated electrons to quickly migrate to the surface, which is beneficial to improve the photogenerated electron-hole To the separation efficiency, thereby improving the photocatalytic activity, is widely used in the degradation of organic dyes su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/34B01J37/10C01G29/00C02F1/30C02F101/30
CPCB01J27/06B01J37/341B01J37/10C01G29/00C02F1/30C02F2305/10C02F2101/308B01J35/39
Inventor 黄勇潮李坤珊李雅张尤王平山
Owner GUANGZHOU UNIVERSITY
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