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Silver chloride-silver phosphate composite photocatalyst and preparation method thereof

A technology of silver phosphate and silver chloride, which is applied in the field of photocatalysis, can solve the problem of low photocatalytic activity, achieve the effect of improving reaction activity, facilitating large-scale promotion, and simple and easy preparation method

Inactive Publication Date: 2011-11-23
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver chloride photocatalyst is a photocatalyst with photocatalytic activity under visible light irradiation, but there is still a problem of low photocatalytic activity

Method used

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  • Silver chloride-silver phosphate composite photocatalyst and preparation method thereof
  • Silver chloride-silver phosphate composite photocatalyst and preparation method thereof
  • Silver chloride-silver phosphate composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of a silver chloride-silver phosphate composite visible light catalyst comprises the steps:

[0026] Weigh 1.1688g or 0.02mol NaCl solid, and 0.7602g or 0.002mol of Na 3 PO 4 12H 2 O was dissolved in 200ml deionized water and stirred for 10min to obtain a mixed solution of phosphate ions and chloride ions;

[0027] Another weighed 4.4166g or 0.026mol AgNO 3 Dissolve in 200ml deionized water, stir for ten minutes to obtain silver nitrate solution;

[0028] Use a dropper to slowly add the silver nitrate solution dropwise to the mixed solution of phosphate ion and chloride ion prepared above, continue stirring for 4 to 5 hours after the dropwise addition, filter the suspension, wash it, and dry it at 60°C. Grind to get yellow Ag 3 PO 4 And the molar ratio of AgCl, that is, chloride ion: phosphate ion is 1:0.1 Ag 3 PO 4 / AgCl composite photocatalyst nanoparticles, the particle size of which is 10-100nm.

Embodiment 2

[0030] When the molar weight of the supported silver phosphate is 0, the preparation of a silver chloride visible light catalyst comprises the following steps:

[0031] Weigh 1.1688g, that is, 0.02mol NaCl solid, dissolve it in 200ml deionized water, and stir for 10min to obtain a sodium chloride solution;

[0032] Another weighed 3.3974g or 0.02mol of AgNO 3 Dissolve in 200ml deionized water, stir for 10min to obtain silver nitrate solution;

[0033] Use a dropper to slowly add the silver nitrate solution to the sodium chloride solution prepared above, and continue stirring for 4 to 5 hours after the addition is completed, filter the suspension, wash, dry at 60°C, and grind to obtain yellow chlorine dioxide. Silver Visible Light Catalyst.

[0034] figure 1 Ag obtained for the above-mentioned embodiment 1 3 PO 4 / AgCl composite photocatalyst and the X-ray diffraction (XRD) pattern of the silver chloride visible light catalyst of embodiment 2 gained, by comparing with the ...

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Abstract

The invention discloses a silver chloride-silver phosphate composite photocatalyst and a preparation method thereof. In the composite photocatalyst, the mole percent ratio of silver chloride and silver phosphate, i.e. silver chloride: silver phosphate, ranges from 1:0-0.3. The preparation method comprises the steps of: preparing a mixed solution of chloride ions and phosphate ions first, and then adding Ag+ ions to the mixed solution, thus obtaining the silver chloride-silver phosphate composite photocatalyst. Application of the silver chloride-silver phosphate composite photocatalyst provided in the invention to photocatalytic degradation of the organic pollutant methylene blue can greatly improve the reaction activity of a silver chloride photocatalyst. In addition, the preparation method of the silver chloride-silver phosphate composite photocatalyst in the invention is simple and practicable, thus benefiting large-scale popularization.

Description

technical field [0001] The invention belongs to the photocatalytic technology in environmental pollution control, and in particular relates to a silver chloride-silver phosphate composite photocatalyst and a preparation method thereof. Background technique [0002] Photocatalytic technology has become one of the current research hotspots in solar energy utilization due to its advantages of easy operation, no pollution, and direct use of sunlight. Traditional photocatalyst TiO 2 Because of its cheap, non-toxic, stable, good catalytic activity and other advantages, it has been widely concerned. But since TiO 2 The bandgap width of the catalyst is wide, and it needs to be excited by ultraviolet light with a wavelength of less than 400nm to show photocatalytic activity, and the solar energy that can be used by it only accounts for about 4% of the solar energy. It is worth noting that visible light (400-750nm) accounts for 43% of the total energy of sunlight. The research and ...

Claims

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Application Information

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IPC IPC(8): B01J27/18A62D3/10
Inventor 姚伟峰宋秀兰吴一平
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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