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Silver rhodanide/polyacid nano composite material preparation method

A nanocomposite material, silver cyanide technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of further improving the catalytic performance of silver-based photocatalytic materials and the preparation of silver-based photocatalytic materials The process is complex, silver-based photocatalysts are susceptible to photoetching and other problems, and it is suitable for large-scale industrial production, the preparation method and process are simple, and the effect of high structural stability

Active Publication Date: 2018-11-06
JINING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structural stability of silver-based photocatalysts is poor due to their susceptibility to photoetching.
Moreover, silver-based photocatalysts are limited by the specific surface of the nanoparticles themselves, and the adsorption of organic pollutants is small, making it difficult to further improve the catalytic performance of silver-based photocatalytic materials.
Moreover, the preparation process of silver-based photocatalytic materials is relatively complicated, which is not conducive to industrial transformation.

Method used

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  • Silver rhodanide/polyacid nano composite material preparation method
  • Silver rhodanide/polyacid nano composite material preparation method
  • Silver rhodanide/polyacid nano composite material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.1g of sodium thiocyanide and 0.05g of phosphomolybdic acid into 30mL of water, and dissolve to form solution A. Solution B was formed by adding 0.2 g of silver nitrate to 10 mL of water. Solution B was added to solution A and reacted for 3h. Then the product was washed with water three times, and dried in a vacuum oven at 80° C. for 12 h.

[0026] Depend on figure 1 According to the XRD pattern, the crystal structure of the silver thiocyanide / polyacid nanocomposite is mainly silver thiocyanide. Depend on figure 2 It can be seen from the scanning electron microscope image that its morphology is nanoparticles.

[0027] Add 0.05g silver thiocyanide / multi-acid composite material to 100mL rhodamine B solution or methylene blue solution (concentration is 5mg / L), after stirring in the dark for 30min, add 0.5mL hydrogen peroxide (concentration is 30wt%) to degrade experiment. Depend on image 3 The degradation of rhodamine B shows that the silver thiocyanide / polya...

Embodiment 2

[0029] As described in Example 1, the difference is that ammonium hydrosulfide and phosphotungstic acid are added. The resulting silver thiocyanide / polyacid composite nanomaterials can degrade rhodamine B up to 100% in 60 minutes.

Embodiment 3

[0031] As described in Example 1, except that potassium thiocyanate and ammonium phosphomolybdate were added. The resulting silver thiocyanide / polyacid composite nanomaterials can degrade rhodamine B up to 100% in 60 minutes.

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Abstract

The invention belongs to the technical field of inorganic nanomaterial preparation and discloses a silver rhodanide / polyacid nano composite material preparation method. The method includes steps: adding thiocyanic acid or thiocyanate with polyacid or polyacid salt into water to form solution A; adding silver salt into water to form solution B; mixing the solution A with the solution B, performingreaction for 0.5-5h, and filtering to obtain a product; washing the product with water or ethyl alcohol, and drying to obtain a silver rhodanide / polyacid nano composite material. The silver rhodanide / polyacid nano composite material is prepared by one-step coprecipitation, controllability in composition and particle size is realized, and the problem of complexity of a composite material preparation process is solved; the preparation method and process are simple, convenient, environmentally harmless, suitable for large-scale industrial production and extensive in application prospect; the prepared silver rhodanide / polyacid nano composite material is excellent in performance and high in structural stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a preparation method of silver thiocyanide / polyacid nanocomposite material. Background technique [0002] In recent years, as people's requirements for environmental protection have become higher and higher and the intensity of environmental protection has increased, how to effectively deal with the environmental pollution brought about by economic development has become the focus of research at this stage. In particular, the pollution treatment of water resources that human beings rely on for survival is imminent. In addition, with the depletion of fossil fuels, how to use renewable energy to deal with environmental pollution is also a difficult research point. Using sunlight and cheap high-efficiency photocatalysts to treat sewage is currently the most promising treatment method. But the vast majority of photocatalysts can only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J27/047B01J27/188B01J27/19B01J35/02B01J37/03C02F1/30C02F101/30C02F101/34C02F101/38C02F101/36
CPCC02F1/30B01J27/04B01J27/047B01J27/188B01J27/19B01J37/03C02F2305/10C02F2101/308C02F2101/38C02F2101/36C02F2101/34B01J35/40B01J35/39
Inventor 张建刘国栋孔令萍崔盈鑫
Owner JINING UNIV
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