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Bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline as well as preparation method and application of photocatalyst

A synergistic modification, ternary composite technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low separation efficiency, visible light absorption efficiency photocatalysis Problems such as poor reaction stability, to achieve the effect of high separation efficiency, good use value and application prospects, and low cost

Active Publication Date: 2019-09-13
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

Method used

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  • Bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline as well as preparation method and application of photocatalyst
  • Bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline as well as preparation method and application of photocatalyst
  • Bismuth vanadate ternary composite photocatalyst synergistically modified by silver phosphate and polyaniline as well as preparation method and application of photocatalyst

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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 as well as a preparation method and application of the photocatalyst. The catalyst comprises a silver phosphate modified bismuth vanadate composite material, and the composite material is modified by the polyaniline; and the silver phosphate modified bismuth vanadate composite material is obtained by depositing the silver phosphate on a carrier by using bismuth vanadate having an exposed (040) crystal face as the carrier. The preparation method comprises the steps of preparing the silver phosphate modified bismuth vanadate composite material and modifying the composite material by the polyaniline. The catalyst provided by the invention has the advantages of high visible-light absorption efficiency, high photogenerated electron-hole pair separation efficiency and strong photocatalytic reaction stability, can be used for degrading organic wastewater andefficiently degrading organic substances (such as antibiotics) in the wastewater, and is a novel photocatalytic material having better use value and application prospects; and the preparation method has the advantages of a green environmentally-friendly preparation process, a simple preparation technology, controllable reaction conditions and low costs, is suitable for large-scale preparation, andfacilitates 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 Applications(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