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Bismuth oxychloride catalyst with visible light response core-shell structure and preparation method thereof

A core-shell structure, bismuth oxychloride technology, used in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., to achieve the effects of good repeatability, high product yield, and easy operation

Inactive Publication Date: 2016-03-16
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely studied catalyst is TiO 2 and ZnO, however these catalysts only respond to ultraviolet light, which accounts for about 4% of sunlight, but not to visible light, which accounts for about 43%

Method used

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  • Bismuth oxychloride catalyst with visible light response core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation steps of BiOCl visible light catalyst are:

[0022] Step 1: Add 0.01mol of bismuth nitrate pentahydrate to 20ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP) mixture, and stir at room temperature until bismuth nitrate pentahydrate is completely dissolved;

[0023] Step 2: Use Na(CO 3 ) 2 Adjust the pH value of the above solution to 3, and stir at room temperature for 30 minutes;

[0024] Step 3: Add the product of step 2 into a 100ml hydrothermal reaction kettle, and react at 130°C for 6h;

[0025] Step 4: After step 3 is completed, filter, wash with distilled water and absolute ethanol respectively, and then dry the product at 120° C. for 12 hours.

[0026] The SEM images of BiOCl samples are shown in figure 1 , it can be seen from the figure that the prepared BiOCl microspheres present a core-shell structure and are solid spheres with a diameter of about 1 μm.

Embodiment 2

[0028] The preparation steps of BiOCl visible light catalyst are:

[0029] Step 1: Add 0.01mol of bismuth nitrate pentahydrate to 20ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP) mixture, and stir at room temperature until bismuth nitrate pentahydrate is completely dissolved;

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

[0031] Step 3: Add the product of step 2 into a 100ml hydrothermal reaction kettle, and react at 100°C for 6h;

[0032] Step 4: After step 3 is completed, filter, wash with distilled water and absolute ethanol respectively, and then dry the product at 120° C. for 12 hours.

Embodiment 3

[0034] The preparation steps of BiOCl visible light catalyst are:

[0035] Step 1: Add 0.01mol of bismuth nitrate pentahydrate to 20ml of ethylene glycol and 5g of polyvinylpyrrolidone (PVP) mixture, and stir at room temperature until bismuth nitrate pentahydrate is completely dissolved;

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

[0037] Step 3: Add the product of step 2 into a 100ml hydrothermal reactor, and react at 160°C for 6h;

[0038] Step 4: After step 3 is completed, filter, wash with distilled water and absolute ethanol respectively, and then dry the product at 120° C. for 12 hours.

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Abstract

The invention provides a bismuth oxychloride catalyst with a visible light response core-shell structure and a preparation method thereof. The preparation method comprises the steps of adding bismuth nitrate pentahydrate into mixed solution of ethylene glycol and polyvinylpyrrolidone, performing stirring at room temperature until bismuth nitrate pentahydrate is fully dissolved; using sodium carbonate to adjust the pH of the solution; after the stirring at room temperature, pouring the solution into a reaction kettle to perform reaction; and after the solution is cooled, performing filtration, washing and drying, so that a bismuth oxychloride microsphere with a core-shell structure having a diameter of about 1 [mu]m is obtained. Under irradiation of visible light, the catalyst achieves complete degradation of target pollutant Rhodamine B dye in 10 min. According to the method, a synthetic route is simple, and the catalyst is high in yield, good in reproducibility, high in catalysis effect and repeated utilization factor and suitable for industrial mass production requirements.

Description

technical field [0001] The invention relates to a bismuth oxychloride catalyst with a visible light-responsive core-shell structure and a preparation method thereof, belonging to the technical field of environmental chemical photocatalytic water treatment, and in particular to visible light treatment of dye polluted wastewater. Background technique [0002] At present, the output of various dyes in my country has reached 900,000 tons, and dye wastewater has become one of the key sources of environmental pollution. The dye industry has a wide variety and complex processes. Its wastewater contains a large amount of organic matter and salt, with COD Cr High, deep color, strong acidity and alkalinity, etc., have always been a difficult problem in wastewater treatment. Dye wastewater treatment methods include adsorption method, membrane separation method, photocatalytic oxidation method, electrochemical oxidation method, ultrasonic degradation method, etc. Among them, the phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30C02F1/72B01J35/02C02F101/34C02F101/38B01J35/00
CPCC02F1/30C02F1/725B01J27/06C02F2101/308C02F2305/10B01J35/397B01J35/50B01J35/39Y02W10/37
Inventor 陆光张爽王菲王辉
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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