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A molecularly imprinted ag/ag 3 vo 4 Preparation method and application of /cn nanosheet composite photocatalyst

A technology of molecular imprinting and composite light, which is applied in the fields of physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low selectivity, high electron-hole recombination rate, and slow electron transport rate. and other issues, to achieve the effect of improved photocatalytic performance, high photocatalytic activity, and high practical application value

Active Publication Date: 2021-10-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical defects of photocatalysts such as slow electron transport rate, high electron-hole recombination rate, and low selectivity, and to prepare molecularly imprinted Ag / Ag by chemical precipitation method and light-induced polymerization method. 3 VO 4 / CN nanosheet composite photocatalyst and its application in the selective degradation of antibiotics

Method used

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  • A molecularly imprinted ag/ag <sub>3</sub> vo <sub>4</sub> Preparation method and application of /cn nanosheet composite photocatalyst
  • A molecularly imprinted ag/ag <sub>3</sub> vo <sub>4</sub> Preparation method and application of /cn nanosheet composite photocatalyst
  • A molecularly imprinted ag/ag <sub>3</sub> vo <sub>4</sub> Preparation method and application of /cn nanosheet composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0058](1) Preparation of CN: Melamine was dissolved in ethanol and stirred for 24 hours, dried by centrifugation, and then calcined in a muffle furnace at a temperature of 550°C and a rate of 2.5°C / min for 4 hours, and the obtained product was fully ground, and then Calcined in a muffle furnace at a temperature of 500°C and a rate of 5°C / min for 2 hours, and acidified the obtained product to obtain CN;

[0059] (2)Ag / Ag 3 VO 4 / CN composite photocatalyst preparation:

[0060] Weigh 1.0g CN and dissolve in 120mL deionized water, stir well and add 0.2935g solid Na 3 VO 4 , after stirring for 4 h, 2.4 mL of AgNO with a concentration of 1 mol / L was added dropwise 3 Solution, after fully stirring to make the reaction complete, continue to react for 20min under ultraviolet light, centrifuge, wash and put into oven to dry to obtain Ag / Ag 3 VO 4 / CN composite photocatalyst, at this time Ag 3 VO 4 The mass accounts for 35% of CN, hereinafter referred to as Ag / Ag 3 VO 4 -35 / CN...

Embodiment 2

[0065] (1) Preparation of CN: Melamine was dissolved in ethanol and stirred for 24 hours, dried by centrifugation, and then calcined in a muffle furnace at a temperature of 550°C and a rate of 2.5°C / min for 4 hours, and the obtained product was fully ground, and then Calcined in a muffle furnace at a temperature of 500°C and a rate of 5°C / min for 2 hours, and acidified the obtained product to obtain CN;

[0066] (2)Ag / Ag 3 VO 4 Preparation of -35 / CN composite photocatalyst: Weigh 1.0g CN and dissolve it in 120mL deionized water, stir well and add 0.2935g solid Na 3 VO 4 , after stirring for 4 h, 2.4 mL of AgNO with a concentration of 1 mol / L was added dropwise 3 Solution, after fully stirring to make the reaction complete, continue to react for 20min under ultraviolet light, centrifuge, wash and put into oven to dry to obtain Ag / Ag 3 VO 4 -35 / CN composite photocatalyst;

[0067] (3) Molecularly imprinted Ag / Ag 3 VO 4 Preparation of -35 / CN (MIP) composite photocatalyst:...

Embodiment 3

[0070] (1) Preparation of CN: Melamine was dissolved in ethanol and stirred for 24 hours, dried by centrifugation, and then calcined in a muffle furnace at a temperature of 550°C and a rate of 2.5°C / min for 4 hours, and the obtained product was fully ground, and then Calcined in a muffle furnace at a temperature of 500°C and a rate of 5°C / min for 2 hours, and acidified the obtained product to obtain CN;

[0071] (2)Ag / Ag 3 VO 4 Preparation of -35 / CN composite photocatalyst: Weigh 1.0g CN and dissolve it in 120mL deionized water, stir well and add 0.2935g solid Na 3 VO 4 , after stirring for 4 h, 2.4 mL of AgNO with a concentration of 1 mol / L was added dropwise 3 Solution, after fully stirring to make the reaction complete, continue to react for 20min under ultraviolet light, centrifuge, wash and put into oven to dry to obtain Ag / Ag 3 VO 4 / CN composite photocatalyst;

[0072] (3) Molecularly imprinted Ag / Ag 3 VO 4 Preparation of -35 / CN(MIP) composite photocatalyst: 0.0...

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Abstract

The invention belongs to the technical field of environmental material preparation and provides a molecularly imprinted Ag / Ag 3 VO 4 Preparation method and application of CN / CN nanosheet composite photocatalyst. The present invention includes (1) preparation of CN; (2) Ag / Ag 3 VO 4 Preparation of / CN nanosheet composite photocatalyst; (3) Molecularly imprinted Ag / Ag 3 VO 4 Preparation of / CN nanosheet composite photocatalyst: adding tetracycline and methacrylic acid, ethylene glycol dimethacrylate with methanol as solvent, and then adding Ag / Ag 3 VO 4 / CN nanosheet composite photocatalyst and azobisisobutyronitrile, and irradiate with ultraviolet light to make it react fully, then centrifuge, wash and dry; the invention realizes molecularly imprinted Ag / Ag 3 VO 4 / g‑C 3 N 4 Nanosheet composite photocatalyst for the purpose of high selectivity for the degradation of antibiotics in sewage.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation and relates to a molecularly imprinted Ag / Ag 3 VO 4 Preparation method and application of CN / CN nanosheet composite photocatalyst. Background technique [0002] For a long time, antibiotics have been widely used in the treatment of human and animal diseases, and are added to animal feed in sub-therapeutic doses to prevent animal diseases and promote their growth. However, most antibiotics cannot be completely absorbed by the body. About 90% of antibiotics are excreted into the environment in the form of prototype or metabolites through the feces and urine of patients, livestock and poultry, and pollute soil and water through different channels. With the indiscriminate discharge of antibiotic wastewater in water bodies and terrestrial ecosystems, antibiotic pollution has become an important environmental problem in the world today. [0003] At present, the technologies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
Inventor 孙林林王会琴李金择李鑫刘重阳霍鹏伟闫永胜
Owner JIANGSU UNIV