Preparation method for hollow silver sulfide microspheres

A technology of silver sulfide and microspheres, which is applied in the fields of copper sulfide, textiles, papermaking, fiber treatment, etc. It can solve the problems of difficult mass production, complex process, high toxicity, etc., and achieve low cost, good water solubility, and uniform particle size Effect

Inactive Publication Date: 2015-10-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these methods are not only complicated, time-consuming, highly toxic, and difficult to produce in batches, but most of the reaction media used are organic solvents.
However, so far, no information about the synthesis of hollow carambola-like Ag in aqueous phase has been found. 2 The study of S microspheres, due to their special morphology and hollow structure, the hollow carambola-like Ag 2 S microspheres have a large specific surface area, which will make them have important application potential in many fields, such as antibacterial, anti-ultraviolet, coloring, special optical performance finishing and catalytic performance.

Method used

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  • Preparation method for hollow silver sulfide microspheres
  • Preparation method for hollow silver sulfide microspheres

Examples

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Embodiment 1

[0026] Mix 50mL 0.04mol / L thiourea aqueous solution with 25mL 0.04mol / L silver nitrate aqueous solution, then add 25mL 0.04mol / L sodium chloride aqueous solution, after adding the reaction solution, place it at 4°C for 2 hours, and filter the resulting precipitate Then add water to wash and dry; add the precipitate to 100mL of 50mL / L diethanolamine aqueous solution, react at 80°C for 15min under the aid of microwave, naturally cool, filter and dry to obtain the product. The SEM and TEM images of the product are attached figure 1 and 2 .

Embodiment 2

[0028] Mix 50mL 0.02mol / L thiourea aqueous solution with 25mL 0.02mol / L silver nitrate aqueous solution, then add 25mL 0.02mol / L sodium chloride aqueous solution, after adding the reaction solution, place it at 4°C for 2 hours, and filter the resulting precipitate Then add water to wash and dry; add the precipitate to 100mL of 25mL / L diethanolamine aqueous solution, react at 70°C for 25min under the aid of microwave, naturally cool, filter and dry to obtain the product.

Embodiment 3

[0030] Mix 50mL of 0.04mol / L thiourea aqueous solution with 25mL of 0.04mol / L silver fluoride aqueous solution, then add 25mL of 0.04mol / L potassium chloride aqueous solution. After filtration, add water to wash and dry; add the precipitate to 100mL of 50mL / L diethanolamine aqueous solution, react at 80°C for 15min under the aid of microwave, naturally cool, filter and dry to obtain the product.

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Abstract

The invention relates to a preparation method of hollow silver sulfide microspheres. The method comprises: firstly, using water-soluble silver salt, thiourea and water-soluble chloride as raw materials to prepare an intermediate product; then putting the intermediate product into alkanolamine solution for a microwave heating reaction for a certain time, thereby preparing and obtaining the hollow carambola-shaped silver sulfide microspheres. The method of invention has the beneficial effects: (1) the structure is strongly controllable, the method and technological process are simple; the reaction is performed in a water phase, the separation and cleaning of the product is easy; the yield rate is high; and the method is environmentally-friendly; (2) the thiourea and alcoholamine used in the preparation process are good in water solubility, nontoxic and harmless, low in cost and easy to obtain, and is beneficial to industrial production; and (3) the hollow carambola-shaped silver sulfide microspheres are good in dispersibility, uniform in particle sizes, uniform in shapes and high in stability.

Description

technical field [0001] The invention belongs to the field of preparation of silver sulfide microspheres, in particular to a preparation method of hollow silver sulfide microspheres. Background technique [0002] Silver sulfide Ag 2 S is a direct narrow-bandgap semiconductor material with a bandgap of about 1eV at room temperature, and has good chemical stability and excellent photoelectric and thermoelectric properties. Ag 2 S has been applied in optical and electrical devices, such as photovoltaic solar cells, photoconductors, infrared detectors, superionic conductors, optical switches, and oxygen sensors, etc. [0003] Ag 2 The research on S materials is relatively popular, and the prepared Ag 2 S products also have a variety of different forms, including monodisperse granular, rod, linear, tubular and hollow granular. Most of the methods are not only complex in process, time-consuming, highly toxic, and difficult to produce in batches, but the reaction medium used is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/12D06M11/53
Inventor 邢彦军苏伟
Owner DONGHUA UNIV
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