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Silver bromide and tin dioxide composite nano-material and preparation method thereof

A technology of composite nanomaterials and tin dioxide, which is applied in the field of materials, can solve problems such as hindering interfacial charge transfer, achieve good visible light absorption, improve photocatalytic performance, and improve separation effects

Inactive Publication Date: 2019-02-05
张家港市沐和新材料技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the silver halide on the direct precipitation inevitably brings serious agglomeration, which hinders the interfacial charge transfer

Method used

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preparation example Construction

[0014] Also disclosed in the present invention is a preparation method of silver bromide tin dioxide composite nanomaterials, comprising: adding SnCl 4 ·5H 2 O, KBr and urea were dissolved in deionized water to obtain a mixed solution A, and AgNO was added dropwise to the mixed solution A while stirring in a water bath at 80-90°C. 3 The solution is magnetically stirred and reacted for 2.5-3.5 hours to obtain a precipitate, which is centrifuged, washed with water, washed with alcohol, and dried in an oven at 55-65°C to obtain a silver bromide tin dioxide composite nanomaterial.

[0015] In the above preparation method, preferably, the KBr solution and the AgNO 3 The concentration of the solution is 0.01~0.5mol / L, further preferably, the KBr solution and the AgNO 3 The concentration of the solution is 0.05mol / L; the SnCl 4 ·5H 2 The molar ratio of O to the urea is 1:5-10, preferably, the SnCl 4 ·5H 2 The molar ratio of O and the urea is 1:5.

Embodiment 1

[0017] SnCl with a molar ratio of 1:5 4 ·5H 2 O, urea and 0.05mol / L KBr were dissolved in deionized water to obtain a mixed solution A, and 0.05mol / LAgNO was added dropwise to the mixed solution A while stirring in a water bath at 80°C. 3 Solution, magnetically stirred and reacted for 3 hours to obtain a precipitate, which was centrifuged, washed with water, washed with alcohol, and dried in an oven at 60°C to obtain a silver bromide tin dioxide composite nanomaterial. The obtained silver bromide tin dioxide The molar ratio composition of the composite nanometer material is: silver bromide 5%, tin dioxide 95%.

Embodiment 2

[0019] SnCl with a molar ratio of 1:10 4 ·5H 2 O, urea and 0.01mol / L KBr were dissolved in deionized water to obtain a mixed solution A, and 0.01mol / LAgNO was added dropwise to the mixed solution A while stirring in a water bath at 85°C. 3 Solution, magnetically stirred and reacted for 2.5 hours to obtain a precipitate, which was centrifuged, washed with water, washed with alcohol, and dried in an oven at 55°C to obtain a silver bromide tin dioxide composite nanomaterial. The obtained silver bromide dioxide The molar ratio composition of the tin composite nanometer material is: silver bromide 10%, tin dioxide 90%.

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Abstract

The invention discloses a silver bromide and tin dioxide composite nano-material. The silver bromide and tin dioxide composite nano-material is prepared from the following components according to themole ratio: 5 to 10 percent of silver bromide and 90 to 95 percent of tin dioxide. The invention further discloses a preparation method of the silver bromide and tin dioxide composite nano-material; the preparation method comprises the following steps: dissolving SnCl4.5H2O, KBr and urea into de-ionized water to obtain a mixed solution A; stirring under a water bath condition of 80 to 90 DEG C anddropwise adding an AgNO3 solution into the mixed solution A; magnetically stirring and reacting for 2.5 to 3.5 h to obtain sediment; centrifuging the sediment; washing with water and washing with alcohol; drying in a drying oven at 55 to 65 DEG C, so as to obtain the silver bromide and tin dioxide composite nano-material. The silver bromide and tin dioxide composite nano-material prepared by themethod provided by the invention has good visible light absorption; the separation of photon-generated carriers is remarkably improved and the photocatalytic properties of the material are greatly improved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a silver bromide tin dioxide composite nano material and a preparation method thereof. Background technique [0002] In recent years, silver halide (AgX, X=Cl, Br, I) supported SiO 2 or TiO 2 The substrate material has good visible light photocatalytic activity. It is worth noting that due to the effective separation of carriers, the silver halide on the carrier can exist stably, avoiding the corresponding photocorrosion. Under the irradiation of light, silver halide is partially reduced to nano-silver. In this way, the obtained silver / silver halide system has strong visible light absorption due to the surface plasmon effect of nano-silver, and at the same time, the system shows good photocatalytic performance. However, the direct precipitation of silver halide inevitably brings about serious agglomeration, which hinders the interfacial charge transfer. Therefore, designin...

Claims

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Application Information

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IPC IPC(8): B01J27/135B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B01J27/135B01J35/40B01J35/39
Inventor 黄俊
Owner 张家港市沐和新材料技术开发有限公司
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