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Preparation method of BiOCl hollow microsphere photocatalyst

A photocatalyst and microsphere technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problem of unclear research on BiCOl photocatalytic materials, separation of photogenerated electron-hole pairs, and hindered transfer rate. and other problems, to achieve good adsorption and photocatalytic effects, simple methods, and the effect of broadening the absorption

Inactive Publication Date: 2020-02-21
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to the objective problems of the above methods such as limited contact area between BiOCl and other materials, separation of photogenerated electron-hole pairs, and hindered transfer rate.
Meanwhile, most of the aforementioned methods to improve photocatalytic performance require energy-intensive processes such as two-step hydrothermal, hydrothermal-calcination, sedimentation-calcination, etc.
[0004] In recent years, the research on BiCOl photocatalytic materials with specific crystal form exposure and specific defect surface is still unclear

Method used

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  • Preparation method of BiOCl hollow microsphere photocatalyst
  • Preparation method of BiOCl hollow microsphere photocatalyst
  • Preparation method of BiOCl hollow microsphere photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 The preparation method of a BiOCl hollow microsphere photocatalyst refers to: slowly add 1L chitosan dispersion into 1.0L bismuth salt solution, stir at 5°C for 100 min to make it into a colloidal state; Slowly add 0.2L of chloride salt solution to the system under stirring conditions, and stir at a constant temperature of 5°C for 100 min; then move the reaction system into a high-pressure reactor, and homogeneously React for 24 hours, and then centrifuge to obtain the product; the product is washed with distilled water three times and dried overnight at 50°C to obtain the BiOCl hollow microsphere photocatalyst.

[0031] Among them: chitosan dispersion refers to dissolving 0.5 g chitosan in 5 mL mixed acid solution and stirring at a constant temperature of 5 °C for 100 min.

[0032] The bismuth salt solution refers to dissolving 1.5 g of bismuth salt in 5 mL of mixed acid solution and mixing evenly.

[0033] Chlorine salt solution refers to dissolving 0.2g of...

Embodiment 2

[0035] Example 2 The preparation method of a BiOCl hollow microsphere photocatalyst refers to: slowly add 1L chitosan dispersion into 5.0L bismuth salt solution, stir at 20°C for 10 min to make it into a colloidal state; Slowly add 2.0L of chloride salt solution to the system under stirring conditions, and stir at a constant temperature of 20°C for 10 min; then transfer the reaction system into a high-pressure reactor, and homogeneously React for 6 hours, and then centrifuge to obtain the product; the product is washed 9 times with distilled water and dried overnight at 200°C to obtain the BiOCl hollow microsphere photocatalyst.

[0036] Among them: chitosan dispersion refers to dissolving 5.0 g chitosan in 50 mL mixed acid solution and stirring at 20 °C for 10 min.

[0037] The bismuth salt solution refers to dissolving 15 g of bismuth salt in 50 mL of mixed acid solution and mixing evenly.

[0038] Chlorine salt solution refers to dissolving 2.0g of chloride salt in 50 mL o...

Embodiment 3

[0040] Example 3 The preparation method of a BiOCl hollow microsphere photocatalyst refers to: slowly add 1L chitosan dispersion into 3.0L bismuth salt solution, stir at 15°C for 50 min to make it into a colloidal state; Slowly add 1.0L of chloride salt solution to the system under stirring conditions, and stir at a constant temperature of 15°C for 60 min; then move the reaction system into a high-pressure reactor, and homogeneously React for 15 hours, and then centrifuge to obtain the product; the product is washed 6 times with distilled water and dried at 120°C overnight to obtain the BiOCl hollow microsphere photocatalyst.

[0041] Among them: chitosan dispersion refers to dissolving 2.5 g chitosan in 25 mL mixed acid solution, and stirring at a constant temperature of 15 °C for 50 min.

[0042] Bismuth salt solution refers to dissolving 8 g of bismuth salt in 25 mL of mixed acid solution and mixing evenly.

[0043] Chlorine salt solution refers to dissolving 1.0g of chlor...

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Abstract

The invention relates to a preparation method of a BiOCl hollow microsphere photocatalyst. The preparation method comprises the following steps: slowly adding a chitosan dispersion solution into a bismuth salt solution, and carrying out stirring at a constant temperature of 5-20 DEG C for 10-100 min to allow the formed system to be in a colloidal state; slowly adding a chlorine salt solution intothe system under a stirring condition, and carrying out stirring for 10-100 min at a constant temperature of 5-20 DEG C; then transferring the reaction system into a high-pressure reaction kettle, andcarrying out a homogeneous reaction and centrifugal separation to obtain a product; and washing the product with distilled water, and performing drying overnight to obtain the BiOCl hollow microsphere photocatalyst. The BiOCl photocatalyst with specific crystal form exposure is prepared through a one-step hydrothermal method; the method is simple in process and low in cost; and the prepared BiOClhollow microsphere photocatalyst has good catalytic degradation performance on TC under simulated sunlight and has good application prospects in the field of photocatalytic degradation of antibioticwastewater.

Description

technical field [0001] The invention relates to the technical field of micro-nano materials and photocatalysis, in particular to a method for preparing a BiOCl hollow microsphere photocatalyst. Background technique [0002] Water resources are an indispensable natural resource in human production and life. However, with the synergistic development of pharmacy, organic chemistry and animal husbandry technology, antibiotics are widely used in the prevention and treatment of infectious diseases and in the field of livestock feeding. Tetracycline (TC) is an antibiotic that is produced and used in large quantities. In recent years, with the excessive use of this class of antibiotics, people continue to detect its existence in the water environment, which directly affects the safety of human water. Nowadays, methods such as adsorption, electrocatalysis, membrane separation, and biodegradation are widely used for TC removal. Based on the high efficiency, low energy consumption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/08B01J35/10C01G29/00C02F1/30C02F101/38C02F103/34
CPCB01J27/06C02F1/30C01G29/00C02F2101/38C02F2305/10C02F2103/343C01P2004/03C01P2006/12C01P2002/72B01J35/51B01J35/613B01J35/39
Inventor 王荣民张展程刘晓晴何玉凤王泽军马玉琳
Owner NORTHWEST NORMAL UNIVERSITY
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