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Preparation method of modified flower-shaped bismuth oxyiodide photocatalyst

A technology of bismuth oxyiodide and photocatalyst, which is applied in the field of preparation of modified flower-shaped bismuth oxyiodide photocatalyst, which can solve the problems of time-consuming and difficult to control the shape, and achieve easy adsorption and removal, improved removal and purification effect, The effect of enhancing the strength of the internal electric field

Pending Publication Date: 2019-11-12
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0004] Bismuth oxyiodide photocatalyst materials have been studied by more and more scholars, and their activity is improved by doping compounding, surface modification and other methods, but the preparation process is time-consuming and the shape is not easy to control, etc., which limit its application in actual production. application

Method used

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  • Preparation method of modified flower-shaped bismuth oxyiodide photocatalyst

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Embodiment 1

[0030] Take by weighing 0.42g bismuth nitrate pentahydrate, dissolve in absolute ethanol, stir magnetically for 30min to obtain bismuth nitrate pentahydrate solution (the concentration of bismuth nitrate pentahydrate solution is generally 0.03-0.04mol / L), then weigh 0.33g potassium iodide Dissolve in deionized water to prepare a potassium iodide solution (the concentration of the potassium iodide solution is generally 0.1-0.2 mol / L), and add the potassium iodide solution into the bismuth nitrate pentahydrate solution. Sodium hydroxide solution and nitric acid solution with a concentration of 10 mol / L were added to the above mixed solution, and the pH values ​​of the solutions were adjusted to 2, 7 and 10, respectively. The solution was placed in the reactor for 12 hours of hydrothermal reaction at 160° C., and the solution obtained by the hydrothermal reaction was washed three times with deionized water and absolute ethanol respectively. The obtained solution was placed in a d...

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Abstract

The invention relates to a preparation method of a modified flower-shaped bismuth oxyiodide photocatalyst. The preparation method of the modified flower-shaped bismuth oxyiodide photocatalyst comprises the following steps: (1) dissolving bismuth nitrate pentahydrate in a solvent to obtain a bismuth nitrate pentahydrate solution; (2) adding a potassium iodide solution into the bismuth nitrate pentahydrate solution; (3) adjusting pH through an acid solution or an alkali solution; and (4) placing the solution in a reaction kettle for hydrothermal reaction, washing, drying and cooling the solutionobtained by the hydrothermal reaction to obtain pure solid, and grinding the pure solid into powder to obtain the modified flower-shaped bismuth iodoxide photocatalyst. Compared with the prior art, the flower-shaped modified bismuth iodoxide photocatalyst prepared by the invention has high catalytic activity, an internal electric field effect is improved, and recombination of electrons and holesis inhibited effectively; and the modified flower-shaped bismuth oxyiodide photocatalyst has excellent application prospect in aspects of organic matter degradation, pollutant removal, carbon dioxidereduction and the like.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a preparation method of a modified flower-shaped bismuth oxyiodide photocatalyst. Background technique [0002] Energy and environmental issues have always been a concern in our country. In the process of industrial production, a large amount of pollutants are discharged. Photocatalytic technology plays an important role in the treatment of pollutants. In recent years, more and more scholars have devoted themselves to the research of photocatalytic technology to remove pollutants. Due to the low activity of photocatalysts, specific surface area, band gap and other factors affect the catalytic activity, it is particularly critical to develop photocatalysts with high activity, large specific surface area and narrow band gap. [0003] Bismuth oxide is a very important functional material, which is widely used in photoelectric conversion, medical and pharmaceutical materials, etc. Among them, the...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J35/02B01D53/86B01D53/60B01D53/64B01D53/38
CPCB01J27/06B01D53/8665B01D53/8637B01D53/8678B01D2258/0283B01J35/00B01J35/30B01J35/39
Inventor 吴江关昱刘启贞吴建国李瑾贾焘徐艺清王润马昕霞郝晨雨官贞珍
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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