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Preparation method of BiOCl photocatalyst, prepared photocatalyst and application of prepared photocatalyst

A photocatalyst and reaction technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve problems such as complex synthesis of ionic liquids, complex preparation methods, and hazards to operators, so as to improve photocatalytic efficiency, The steps are simple and convenient, and the effect of less energy consumption

Inactive Publication Date: 2017-09-15
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing preparation methods are relatively complex
For example, BiOCl is synthesized by using imidazole hydrochloride ionic liquid as a chlorine source, but the synthesis of this ionic liquid is complicated and not conducive to industrial applications; or the use of corrosive chemical reagents in the synthesis process increases safety risks and may cause harm to operators. Hazard; for example: using 1-hexadecyl-3-methylimidazolium chloride ionic liquid as a solvent to synthesize BiOCl, although the resulting product has better performance, but the chemical reagents used in the process of synthesizing the ionic liquid are toxic organic substances, which are harmful to personnel It is more harmful and does not use the treatment of follow-up experimental waste

Method used

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  • Preparation method of BiOCl photocatalyst, prepared photocatalyst and application of prepared photocatalyst
  • Preparation method of BiOCl photocatalyst, prepared photocatalyst and application of prepared photocatalyst
  • Preparation method of BiOCl photocatalyst, prepared photocatalyst and application of prepared photocatalyst

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Embodiment B

[0028] The preparation method of BiOCl photocatalyst of the embodiment of the present invention, described method comprises the steps:

[0029] (1) Add bismuth nitrate and glucose in water, stir evenly to obtain a mixed solution; the molar ratio of the bismuth nitrate and glucose is: 1: (0.05-1);

[0030] (2) Adding chloride solution dropwise to the mixed solution obtained in step (1), stirring evenly to obtain a bismuth-containing precursor solution;

[0031] (3) Adjust the pH value of the bismuth-containing precursor solution obtained in step (2) to 5.0-6.5 by using an alkaline solution, and stir to form a reactant evenly;

[0032] (4) Reacting the reactant obtained in step (3) at 150-160° C. for 24-30 hours to obtain a precipitate;

[0033] (5) Washing and drying the precipitate obtained in step (4) to obtain BiOCl powder.

[0034] The source of bismuth generally selects the nitrate of bismuth, such as commercially available Bi(NO 3 ) 3 ·5H 2 O, bismuth nitrate decompo...

Embodiment 1

[0041] Weigh 4.85g of Bi(NO 3 ) 3 ·5H 2O was added to 25ml ultrapure water containing 0.1g glucose to obtain a bismuth-containing mixed solution; the bismuth-containing mixed solution was stirred for 30min and mixed uniformly to obtain a white mixed solution; 2.238g KCl was weighed and added to 150ml ultrapure water, Ultrasound for 30 minutes, stirred until uniform to obtain a KCl solution; under stirring, add 5ml of KCl solution to the white mixed solution to obtain a bismuth-containing precursor solution, and adjust the pH of the bismuth-containing precursor solution to 6.0 with 1mol / L KOH solution, Stir evenly to form a reactant; transfer the reactant to a Teflon high-pressure reactor, and conduct a solvothermal reaction at 160°C for 24 hours to obtain a precipitate; wash the precipitate with deionized water and ethanol three times and then dry it in vacuum at 50°C for 12h to obtain BiOCl photocatalyst powders with different morphologies.

Embodiment 2

[0043] Weigh 4.85g of Bi(NO 3 ) 3 ·5H 2 O was added to 25ml of ultrapure water containing 0.3g of glucose to obtain a bismuth-containing mixed solution; the bismuth-containing mixed solution was stirred for 30 minutes and mixed evenly to obtain a white mixed solution. 0.2mol / L KCl solution to obtain a bismuth-containing precursor solution, and adjust the pH of the bismuth-containing precursor solution to 6.0 with 1mol / L KOH solution, stir evenly to form a reactant; transfer the reactant to a Teflon high-pressure reactor , solvothermal reaction at 160°C for 24h to obtain a precipitate; the precipitate was washed three times with deionized water and ethanol and then vacuum-dried at 50°C for 12h to obtain BiOCl photocatalyst powders with different morphologies.

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Abstract

The invention provides a preparation method of a BiOCl photocatalyst, the prepared photocatalyst and application of the prepared photocatalyst. The method comprises the following steps: (1) adding bismuth nitrate and glucose into water, stirring evenly to obtain a mixed solution, wherein the molar ratio of the bismuth nitrate to the glucose is 1:(0.05-1); (2) dropwise adding a chloride solution into the mixed solution obtained in the step (1), stirring evenly to obtain a bismuth containing precursor solution; (3) using an alkaline solution to regulate the pH value of the bismuth containing precursor solution obtained in the step (2) to 5.0-6.5, stirring evenly to form a reactant; (4) enabling the reactant obtained in the step (3) to react for 24-30 hours at the temperature of 150-160 DEG C to obtain a precipitate; (5) washing and drying the precipitate obtained in the step (4) to obtain a BiOCl powder. The preparation cycle is short, the preparation method is simple, the natural product glucose is used to regulate the shape, the water is taken as the solvent, the whole process is nontoxic and harmless, no secondary pollutant is produced, and the preparation method has the characteristic of green synthesis.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical photocatalytic water treatment, and in particular relates to a preparation method of a BiOCl photocatalyst, the prepared photocatalyst and its application. Background technique [0002] With the rapid development of economy and society, it has brought a series of serious problems to the environment, especially the pollution of the water environment, which is the source of human survival, is even more serious. Therefore, how to effectively eliminate water pollution has become the focus of current researchers. one of the hotspots. Photocatalytic technology uses light energy to stimulate semiconductor materials to degrade organic pollutants. Due to its low cost, no secondary pollution, and thorough treatment of pollutants, it has become the most promising member of many methods for new energy development and water pollution control. . [0003] The principle of photocatalytic technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10C02F1/30C01G29/00C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01G29/00C02F1/30B01J27/10C01P2002/72C01P2004/03C01P2004/20C01P2004/32C01P2004/45C02F2101/30C02F2101/40C02F2101/38C02F2101/34C02F2101/36C02F2305/10B01J35/39Y02W10/37
Inventor 徐海明夏东升李东亚李宜睿袁向娟孙磊曹刚孙静宇蔡雨杰
Owner WUHAN TEXTILE UNIV
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