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A kind of bismuth stannate/silver-silver chloride photocatalytic film material and preparation method thereof

A thin-film material, bismuth stannate technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as secondary pollution, difficulty in powder catalyst recovery, and low utilization rate of visible light, and achieve Easy to recycle, the preparation process is green and environmentally friendly, and the effect of high strength

Inactive Publication Date: 2020-02-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a kind of bismuth stannate / silver-silver chloride (Bi 2 sn 2 o 7 / Ag-AgCl) photocatalytic thin film material preparation method to improve the feasibility of photocatalysis in practical water treatment applications

Method used

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  • A kind of bismuth stannate/silver-silver chloride photocatalytic film material and preparation method thereof
  • A kind of bismuth stannate/silver-silver chloride photocatalytic film material and preparation method thereof
  • A kind of bismuth stannate/silver-silver chloride photocatalytic film material and preparation method thereof

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Embodiment 1

[0035] The present invention prepares nano Bi by hydrothermal synthesis method 2 sn 2 o 7 powder. Weigh 4.38g of Bi(NO 3 ) 3 ·5H 2 O and 2.70 g of K 2 SnO 3 ·3H 2 O and the two substances were thoroughly mixed in 90 mL of deionized water, and the pH value of the mixed liquid was adjusted to 12 by adding ammonia water drop by drop under magnetic stirring. Stirring was continued for one hour, then the mixture was transferred to a 200 mL polytetrafluoroethylene hydrothermal reactor and deionized water was added to make up to 160 mL. Raise the temperature to 180° C., keep it for 24 hours, then cool naturally, filter with suction and vacuum-dry at 60° C. to obtain light yellow nano-bismuth stannate powder.

[0036] The present invention adopts common glass flake as base material 15mm * 20mm, because the surface of base material is easy to absorb impurities that may affect Bi 2 sn 2 o 7 Therefore, the substrate should be cleaned before spin coating to prepare a film with...

Embodiment 2

[0050] For comparison, different dispersants were used to disperse bismuth stannate powder to prepare bismuth stannate thin films. Wherein bismuth stannate powder is also prepared by hydrothermal synthesis. Weigh 4.38g of Bi(NO 3 ) 3 ·5H 2 O and 2.70 g of K 2 SnO 3 ·3H 2 0 and two kinds of materials are fully mixed in 90mL deionized water, under magnetic stirring, by dropwise adding ammoniacal liquor, the pH value of mixed liquid is adjusted to 12. Stirring was continued for one hour, then the mixture was transferred to a 200 mL polytetrafluoroethylene hydrothermal reactor, and deionized water was added to make up to 160 mL. The temperature was raised to 180°C, kept for 24h, then naturally cooled, suction filtered and vacuum-dried at 60°C to obtain light yellow nano-bismuth stannate powder.

[0051] The common glass sheet is used as the base material 15mm×20mm, because the surface of the base material is easy to absorb impurities, which may affect Bi 2 sn 2 o 7 There...

Embodiment 3

[0055] For comparison, different dispersants were used to disperse bismuth stannate powder to prepare bismuth stannate thin films. Wherein bismuth stannate powder is also prepared by hydrothermal synthesis. Weigh 4.38g of Bi(NO 3 ) 3 ·5H 2 O and 2.70 g of K 2 SnO 3 ·3H 2 0 and two kinds of materials are fully mixed in 90mL deionized water, under magnetic stirring, by dropwise adding ammoniacal liquor, the pH value of mixed liquid is adjusted to 12. Stirring was continued for one hour, then the mixture was transferred to a 200 mL polytetrafluoroethylene hydrothermal reactor, and deionized water was added to make up to 160 mL. The temperature was raised to 180°C, kept for 24h, then naturally cooled, suction filtered and vacuum-dried at 60°C to obtain light yellow nano-bismuth stannate powder.

[0056] The common glass sheet is used as the base material 15mm×20mm, because the surface of the base material is easy to absorb impurities, which may affect Bi 2 sn 2 o 7 There...

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Abstract

The invention provides a bismuth stannate / silver-silver chloride Bi2Sn2O7 / Ag-AgCl photocatalytic film material and a preparation method thereof, wherein bismuth stannate nanometer powder is synthesized through a hydrothermal method, and dispersion, rotary coating, sintering, deposition and photo reducing are performed to prepare the Bi2Sn2O7 / Ag-AgCl photocatalytic film material. According to the present invention, the Bi2Sn2O7 / Ag-AgCl photocatalytic film material has advantages of excellent crystallinity, excellent dispersibility, excellent photoelectric property, excellent visible light catalytic activity and high film strength; the photocatalytic activity of the Bi2Sn2O7 / Ag-AgCl photocatalytic film material is high, and is much higher than the photocatalytic activity of the single-phase Bi2Sn2O7 film; and the Bi2Sn2O7 / Ag-AgCl photocatalytic film material has the large specific surface area, such that the absorption on visible light is strong, and the electron-hole separation efficiency is high.

Description

technical field [0001] The invention belongs to the field of synthesis of photocatalytic thin film materials, specifically a bismuth stannate / silver-silver chloride Bi 2 sn 2 o 7 / Ag-AgCl photocatalytic thin film material and its preparation method. Background technique [0002] In today's society, the problem of water pollution is becoming more and more serious, seriously threatening human health and affecting the sustainable development of society. Traditional physical adsorption cannot effectively treat organic pollutants in water, while chemical treatment is likely to cause secondary pollution. Photocatalytic technology can use light irradiation to degrade organic pollutants in water. It has the advantages of low cost, easy operation, and no secondary pollution. It has become one of the effective methods to solve the problem of water pollution. However, most photocatalysts only respond to ultraviolet light, and the utilization rate of sunlight is low, which severely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/135B01J35/06C02F1/30
CPCB01J27/135B01J35/004B01J35/065C02F1/30C02F2305/10
Inventor 王田禾赵晓娟崔宏达
Owner NANJING UNIV OF SCI & TECH
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