Preparation method for hollow silver sulfide microspheres

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...

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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.

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