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Bismuth vanadate ternary composite photocatalyst modified synergistically with silver phosphate and polyaniline and its preparation method and application

A synergistic modification and ternary compound technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor photocatalytic reaction stability, visible light absorption efficiency, Problems such as low separation efficiency

Active Publication Date: 2021-04-20
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current research on using the (040) crystal plane of bismuth vanadate to construct bismuth vanadate / silver phosphate binary heterojunction still has the following problems: Self-oxidation may occur, and the visible light absorption efficiency and photocatalytic reaction stability of binary composites are poor

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  • Bismuth vanadate ternary composite photocatalyst modified synergistically with silver phosphate and polyaniline and its preparation method and application
  • Bismuth vanadate ternary composite photocatalyst modified synergistically with silver phosphate and polyaniline and its preparation method and application
  • Bismuth vanadate ternary composite photocatalyst modified synergistically with silver phosphate and polyaniline and its preparation method and application

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Embodiment 1

[0049] A bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline, comprising silver phosphate modified bismuth vanadate composite material, silver phosphate modified bismuth vanadate composite material is modified with polyaniline, wherein silver phosphate modified The bismuth vanadate composite material is based on the bismuth vanadate exposed on the (040) crystal plane, and silver phosphate is deposited on the (040) crystal plane of the bismuth vanadate.

[0050] In this embodiment, the silver phosphate is granular, and it is deposited in situ on the (040) crystal plane of bismuth vanadate, wherein the bismuth vanadate exposed on the (040) crystal plane is in the shape of a decahedron with a smooth surface and obvious Angular, the crystal side length is 100nm ~ 300nm.

[0051] In this embodiment, the mass ratio of bismuth vanadate exposed on the (040) crystal plane to silver phosphate is 1:0.1256.

[0052] In this embodi...

Embodiment 2

[0066] A silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst is basically the same as the silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst in Example 1, the only difference is: The mass ratio of polyaniline and silver phosphate-modified bismuth vanadate composite material in Example 2 is 0.04:1.

[0067] A preparation method of the silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst of the above-mentioned present embodiment is basically the same as the preparation method of Example 1, the difference is only that in the preparation method of Example 2, the polyaniline The amount of aniline used was 40 mg, and the volume of N,N-dimethylformamide was 100 mL.

[0068] The silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalysts obtained in Example 2 are named as BiV...

Embodiment 3

[0070] A silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst is basically the same as the silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst in Example 1, the only difference is: In Example 3, the mass ratio of polyaniline to silver phosphate-modified bismuth vanadate composite material is 0.05:1.

[0071] A preparation method of the silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalyst of the above-mentioned present embodiment is basically the same as the preparation method of Example 1, the only difference is that in the preparation method of Example 3, the polyaniline The amount of aniline used was 50 mg, and the volume of N,N-dimethylformamide was 125 mL.

[0072] The silver phosphate and polyaniline synergistically modified bismuth vanadate ternary composite photocatalysts obtained in Example 3 are named as BiV...

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Abstract

The invention discloses a bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline and its preparation method and application. The catalyst comprises a silver phosphate-modified bismuth vanadate composite material, on which polyaniline is modified; The silver phosphate modified bismuth vanadate composite material is based on the bismuth vanadate exposed on the (040) crystal plane, on which silver phosphate is deposited. The preparation method comprises preparing silver phosphate modified bismuth vanadate composite material and modifying polyaniline on it. The catalyst of the present invention has the advantages of high absorption efficiency of visible light, high separation efficiency of photogenerated electron-hole pairs, strong photocatalytic reaction stability, etc., can be used to degrade organic wastewater, and can efficiently degrade organic substances (such as antibiotics) in wastewater. A new photocatalytic material with good use value and application prospect. The preparation method has the advantages of green and environmental protection, simple preparation process, controllable reaction conditions, and low cost. It is suitable for large-scale preparation and is conducive to industrial application.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline, a preparation method and application thereof. Background technique [0002] Fluoroquinolone antibiotics are widely used in the clinical treatment of bacterial infectious diseases because of their strong antibacterial properties, good oral absorption, low allergy rate, and no interference from other antibacterial drugs. Ciprofloxacin is a common fluoroquinolone antibiotic, and its large-scale use increases the burden of antibiotic wastewater treatment. In view of the shortcomings of traditional physical and biological treatment methods such as low efficiency, long cycle, and high cost, advanced oxidation technology has become the most effective way to deal with the current serious fluoroquinolone antibiotic wastewater, the most prominent of which is the use of semicond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/36C02F1/30C02F101/38
CPCB01J31/36C02F1/30C02F2101/38B01J35/39
Inventor 黄丹莲陈莎曾光明薛文静雷蕾邓锐李婧李志豪李涛张青
Owner HUNAN UNIV