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Silver/silver phosphate composite material and preparation method thereof

A composite material and silver phosphate technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low utilization rate of sunlight, etc., and achieve simple and easy preparation methods and mild synthesis conditions , is conducive to the effect of large-scale promotion

Active Publication Date: 2013-04-03
陕西万华环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional anatase TiO 2 The photocatalyst has a bandgap width of about 3.2eV, and can only be excited by absorbing ultraviolet light (wavelength less than 390nm), showing strong photocatalytic activity, while the energy of sunlight is mainly concentrated in the visible light range of 400-700nm. Only accounts for about 4% of sunlight, visible, TiO 2 In the photocatalytic process, the utilization rate of sunlight is low

Method used

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  • Silver/silver phosphate composite material and preparation method thereof
  • Silver/silver phosphate composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Dissolve 1.42g disodium hydrogen phosphate in 100mL deionized water to make 0.1mol / L disodium hydrogen phosphate solution A; dissolve 4.98g silver acetate solution in 300mL deionized water to make 0.1mol / L silver acetate solution B: Mix the above-mentioned solutions A and B uniformly according to the molar ratio of 1:3 under stirring state, centrifuge washing after standing, and dry at 80°C for 12h. Disperse silver phosphate and sodium fluoride in absolute ethanol according to the molar ratio of silver phosphate, sodium fluoride, and absolute ethanol at 0.001:0.001:1, then move to the reaction kettle, place in a microwave reactor and heat to 150 ℃ microwave solvent heat treatment for 0.5h, take it out and cool it down to room temperature naturally, centrifuge the obtained product, wash it with deionized water three times, and dry it at 80℃ for 12h to obtain a silver / silver phosphate composite material.

Embodiment 2

[0020] Dissolve 7.1g of disodium hydrogen phosphate in 100mL of deionized water to make 0.5mol / L disodium hydrogen phosphate solution A; dissolve 24.9g of silver acetate solution in 300mL of deionized water to make 0.5mol / L of silver acetate Solution B: Mix the above two solutions A and B uniformly according to the molar ratio of 1:3 under stirring, and then centrifugally wash and dry at 80°C for 12 hours after standing still. Disperse silver phosphate and sodium fluoride in absolute ethanol according to the molar ratio of silver phosphate, sodium fluoride, and absolute ethanol at 0.005:0.005:1, then move to the reaction kettle, place in a microwave reactor and heat to 210 ℃ microwave solvent heat treatment for 3 hours, take it out and cool it down to room temperature naturally, centrifuge the obtained product, wash it with deionized water three times, and dry it at 80℃ for 12 hours to obtain a silver / silver phosphate composite material.

Embodiment 3

[0022] Dissolve 7.1g disodium hydrogen phosphate in 100mL deionized water to make 0.05mol / L disodium hydrogen phosphate solution A; dissolve 24.9g silver acetate solution in 300mL deionized water to make 0.5mol / L silver acetate solution B: The above two solutions A and B were mixed uniformly according to the molar ratio of 1:3 under stirring, and then centrifugally washed and dried at 80°C for 12 hours after standing still. Disperse silver phosphate and sodium fluoride in absolute ethanol according to the molar ratio of silver phosphate, sodium fluoride, and absolute ethanol at 0.005:0.001:1, then move to the reaction kettle, place in a microwave reactor and heat to 150 ℃ microwave solvent heat treatment for 3 hours, take it out and cool it down to room temperature naturally, centrifuge the obtained product, wash it with deionized water three times, and dry it at 80℃ for 12 hours to obtain a silver / silver phosphate composite material.

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Abstract

The invention relates to a preparation method of a silver / silver phosphate composite material. The composite material is the powder composed of elemental silver and silver phosphate; the elemental silver is obtained by being separated by reducing partial silver phosphate based on the reducibility of the hydroxyl in the ethanol during the solvent thermal treatment, thus preparation of the silver / silver phosphate composite material is realized. The preparation method comprises the following steps in sequence: mixing a disodium hydrogen phosphate solution with a silver acetate solution to obtain silver phosphate powder; mixing the silver phosphate with sodium fluoride and absolute ethyl alcohol; and carrying out the solvothermal method under the assistance of microwave heating, so as to obtain the silver / silver phosphate composite material. The preparation method is simple and low in cost; and the optical adsorption property of the prepared composite material in a visual region is higher than that of the silver phosphate.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a silver / silver phosphate composite material and a preparation method thereof. Background technique [0002] Traditional anatase TiO 2 The bandgap width of photocatalyst is about 3.2eV, and it can only be excited by absorbing ultraviolet light (wavelength less than 390nm), showing strong photocatalytic activity, while the energy of sunlight is mainly concentrated in the visible light range of 400-700nm, ultraviolet light Only accounts for about 4% of sunlight, visible, TiO 2 In the photocatalytic process, the utilization rate of sunlight is low. Therefore, the development of new visible light catalysts is the key to improving the utilization rate of solar energy, expanding the application range of photocatalysis technology, and finally realizing the industrial application of photocatalysis technology. [0003] As a new type of visible light responsive ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18
Inventor 李军奇朱振峰刘辉何选盟郭占云王德方
Owner 陕西万华环境工程有限公司
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