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Spherical Bi3O4Cl/BiOCl (bismuth-based oxychloride/bismuth oxychloride) visible light catalyst and preparation method thereof

A photocatalyst and catalyst technology, used in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of complicated preparation steps and high energy consumption, and achieve good repeatability and product yield. High efficiency and easy operation

Inactive Publication Date: 2017-01-04
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Bi 3 o 4 The preparation steps of Cl are cumbersome and require high energy consumption

Method used

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  • Spherical Bi3O4Cl/BiOCl (bismuth-based oxychloride/bismuth oxychloride) visible light catalyst and preparation method thereof
  • Spherical Bi3O4Cl/BiOCl (bismuth-based oxychloride/bismuth oxychloride) visible light catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Bi 3 o 4 The preparation steps of Cl / BiOCl photocatalyst are:

[0023] Step 1: Add bismuth nitrate pentahydrate and sodium chloride of 2:1 molar ratio in the mixed solution of 10ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP), wherein 1g of bismuth nitrate pentahydrate is stirred at room temperature to nitric acid pentahydrate Bismuth and sodium chloride are completely dissolved;

[0024] Step 2: Use Na(CO 3 ) 2 Adjust the pH value of the above solution to 6, and stir at room temperature for 30 minutes;

[0025] Step 3: Add the product of step 2 and 0.5g of urea into a 100ml hydrothermal reactor, and react at 140°C for 6h;

[0026] Step 4: After step 3, after centrifugal filtration, wash with distilled water and absolute ethanol three times respectively, and dry at 120°C for 12 hours to obtain Bi 3 o 4 Cl / BiOCl photocatalyst, the catalyst is a microsphere with a diameter of 1-2 μm.

Embodiment 2

[0028] Bi 3 o 4 The preparation steps of Cl / BiOCl photocatalyst are:

[0029] Step 1: Add bismuth nitrate pentahydrate and sodium chloride at a molar ratio of 3:2 in the mixed solution of 10ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP), wherein 1g of bismuth nitrate pentahydrate is stirred at room temperature until nitric acid pentahydrate Bismuth and sodium chloride are completely dissolved;

[0030] Step 2: Use Na(CO 3 ) 2 Adjust the pH value of the above solution to 6, and stir at room temperature for 30 minutes;

[0031] Step 3: Add the product of step 2 and 0.5g of urea into a 100ml hydrothermal reactor, and react at 140°C for 6h;

[0032] Step 4: After step 3, after centrifugal filtration, wash with distilled water and absolute ethanol three times respectively, and dry at 120°C for 12 hours to obtain Bi 3 o 4 Cl / BiOCl photocatalyst, the catalyst is a microsphere with a diameter of 1-2 μm.

Embodiment 3

[0034] Bi 3 o 4 The preparation steps of Cl / BiOCl photocatalyst are:

[0035] Step 1: Add bismuth nitrate pentahydrate and sodium chloride in a molar ratio of 5:2 to 10ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP) mixed solution, wherein 1g of bismuth nitrate pentahydrate, stir at room temperature until the pentahydrate Bismuth nitrate and sodium chloride are completely dissolved;

[0036] Step 2: Use Na(CO 3 ) 2 Adjust the pH value of the above solution to 6, and stir at room temperature for 30 minutes;

[0037] Step 3: Add the product of step 2 and 0.5g of urea into a 100ml hydrothermal reactor, and react at 140°C for 6h;

[0038] Step 4: After step 3, after centrifugal filtration, wash with distilled water and absolute ethanol three times respectively, and dry at 120°C for 12 hours to obtain Bi 3 o 4 Cl / BiOCl photocatalyst, the catalyst is a microsphere with a diameter of 1-2 μm.

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Abstract

The invention provides a preparation method of a spherical Bi3O4Cl / BiOCl (bismuth-based oxychloride / bismuth oxychloride) visible light catalyst. The preparation method specifically comprises the following steps of respectively adding bismuth nitrate pentahydrate and sodium chloride into mixing liquid of ethylene glycol and polyvinylpyrrolidone, and stirring at the room temperature until the bismuth nitrate pentahydrate and sodium chloride are completely dissolved; adjusting the pH (potential of hydrogen) value of the solution by sodium carbonate, and continuing to stir for 30min at room temperature after the pH value is stabilized; adding a reaction matter and urea into a reaction kettle, and reacting for 6h at the temperature of 100 to 200 DEG C; cooling, filtering, washing, and drying, so as to obtain a Bi3O4Cl / BiOCl microsphere with diameter of about 1 to 2mum. The preparation method has the advantages that the visible light can be well absorbed by the catalyst, and rhodamine dye B can be completely dissolved after 10min; the preparation method is simple, the implementing is easy, the reproducibility is good, the prepared catalyst has stable structure, high catalytic efficiency and high repeated utilization rate, and the preparation method is suitable for meeting the requirements of industrial large-batch production.

Description

technical field [0001] The invention relates to a visible light catalyst and a preparation method, in particular to a spherical Bi 3 o 4 The invention relates to a Cl / BiOCl visible light catalyst and a preparation method thereof, which belong to the technical field of photocatalytic water treatment of environmental chemical industry, and in particular relate to visible light treatment of dye polluted wastewater. Background technique [0002] Bismuth oxychloride (BiOCl) is a low-cost, easy-to-prepare, stable and non-toxic compound. The valence band composed of Bi6s and O2p orbital hybridization is easy for the migration of photogenerated carriers, and the conduction band composed of Bi6p has relatively Strong reducing ability, so BiOCl has high photocatalytic activity. However, BiOCl has a wide band gap of about 3.2eV, and can only use about 4% of the ultraviolet light in sunlight, so its practical application has been greatly hindered. [0003] Bi, a member of the Sillén ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J35/08C02F1/30C02F101/38
CPCC02F1/30B01J27/10C02F2305/10C02F2101/38C02F2101/308B01J35/51B01J35/39Y02W10/37
Inventor 王辉邹爽石朔宇柳欢张爽张锦宁
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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