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Microwave-synthesized oxygen vacancy BiOCl/Bi2O3 catalyst as well as preparation method and application thereof

A microwave synthesis and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as water body hazards, achieve safe reaction temperature, simple and convenient preparation steps, and good degradation effect Effect

Active Publication Date: 2020-04-24
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a large amount of this difficult-to-degrade neonicotinoid pesticide enters the environment due to use or improper disposal, it will still cause great harm to the water body.

Method used

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  • Microwave-synthesized oxygen vacancy BiOCl/Bi2O3 catalyst as well as preparation method and application thereof
  • Microwave-synthesized oxygen vacancy BiOCl/Bi2O3 catalyst as well as preparation method and application thereof
  • Microwave-synthesized oxygen vacancy BiOCl/Bi2O3 catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Put 0.2425g of bismuth nitrate pentahydrate (0.5mmol) and 0.07455g of potassium chloride (1mmol) in a beaker, add 30mL of ethylene glycol to it, place it on a magnetic stirrer, and stir for 60min at a speed of 500r / min , and the bismuth precursor solution is obtained after complete dissolution. All the bismuth precursor solution was placed in a microwave reactor, and under the conditions of 700r / min and 1000W, the microwave was heated to 170°C and kept for 10min to obtain precipitation. The obtained precipitate was washed with deionized water until clarified, then washed with absolute ethanol until clarified, and dried in vacuum at a temperature of 60° C. to obtain a white BiOCI catalyst powder.

Embodiment 2

[0047] Put 0.2425g of bismuth nitrate pentahydrate (0.5mmol) and 0.07455g of potassium chloride (1mmol) in a beaker, add 30mL of ethylene glycol to it, place it on a magnetic stirrer, and stir for 60min at a speed of 500r / min , and the bismuth precursor solution is obtained after complete dissolution. Put all the bismuth precursor solution in the microwave reactor, under the conditions of 700r / min and 1000W, microwave heating to 170°C and keep it warm for 10min (the first stage), then add 0.1mL sodium hypochlorite solution into the microwave reactor and Continue to incubate for 10 min (the second stage) to obtain precipitation. The obtained precipitate was washed with deionized water until clarified, then washed with absolute ethanol until clarified, and dried in vacuum at a temperature of 60°C to obtain BiOCl / Bi 2 o 3 Heterojunction catalyst White powder.

Embodiment 3

[0049] Put 0.2425g of bismuth nitrate pentahydrate (0.5mmol) and 0.07455g of potassium chloride (1mmol) in a beaker, add 30mL of ethylene glycol to it, place it on a magnetic stirrer, and stir for 60min at a speed of 500r / min , and the bismuth precursor solution is obtained after complete dissolution. Put all the bismuth precursor solution in the microwave reactor, under the conditions of 700r / min and 1000W, microwave heating to 170°C and keep it warm for 10min (the first stage), then add 0.5mL sodium hypochlorite solution into the microwave reactor and Continue to incubate for 10 min (the second stage) to obtain precipitation. The obtained precipitate was washed with deionized water until clarified, then washed with absolute ethanol until clarified, and dried in vacuum at a temperature of 60°C to obtain BiOCl / Bi 2 o 3 Heterojunction catalyst White powder.

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Abstract

The invention particularly relates to a microwave-synthesized oxygen vacancy BiOCl / Bi2O3 catalyst as well as a preparation method and application thereof, and belongs to the technical field of environmental engineering advanced oxidation, wherein the preparation method of the microwave-synthesized oxygen vacancy BiOCl / Bi2O3 catalyst comprises the steps: dissolving bismuth salt and chloride in alcohol to obtain a bismuth precursor solution; carrying out a first reaction on the bismuth precursor solution in a microwave environment under a stirring condition to obtain a BiOCl / Bi2O3 catalyst. TheBiOCl / Bi2O3 heterojunction catalyst containing a proper amount of oxygen vacancies, persulfate and other catalysts prepared by adopting the preparation method provided by the embodiment of the invention can generate a good degradation effect on refractory pollutants such as imidacloprid with complex structures under the irradiation of visible light.

Description

technical field [0001] The invention belongs to the technical field of advanced oxidation of environmental engineering, in particular to a microwave synthesis of oxygen vacancy BiOCl / Bi 2 o 3 Catalyst and its preparation method and application. Background technique [0002] Imidacloprid, chemical name is 1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylamine, molecular formula C 9 h 10 ClN 5 o 2 . It is a new generation of chlorinated nicotine insecticide, which belongs to neonicotinoid pesticides. Because of its low toxicity, high efficiency and low residue characteristics, it is widely used to control piercing-sucking mouthparts pests and their resistant strains. However, if such neonicotinoid pesticides, which are difficult to degrade, enter the environment in large quantities due to use or improper disposal, they will still cause great harm to water bodies. [0003] Due to the advantages of mild reaction conditions, low energy consumption, and less secondary p...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F1/72C02F1/76C02F101/38
CPCB01J27/06C02F1/30C02F1/725C02F1/722C02F1/766C02F2305/023C02F2305/02C02F2101/38B01J35/39Y02W10/37
Inventor 徐海明夏东升李东亚邹忠炜夏欢秦海兰邓城铭
Owner WUHAN TEXTILE UNIV
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