Preparation method of nanometer copper gadolinium sulfide powder and film containing nanometer copper gadolinium sulfide

Abstract

The invention discloses nano copper-gadolinium sulfide powder, a film containing nano copper-gadolinium sulfide and a preparation method of the film. The nano powder is of a cubic spinel structure, namely CuGd2S4. The powder is prepared by an ultrasonic atomization method. A copper sulfide and gadolinium sulfide mixed solution and a sodium sulfide solution are subjected to contact reaction so as to produce CuGd2S4; and the powder is subjected to powder treatment, such as wet grinding and dry grinding, is then dispersed into a cetyl methyl ammonium bromide solution and is then mixed with polyvinyl alcohol viscous liquid, so as to obtain viscous liquid, and the viscous liquid is coated on the surface of a clean glass and dacron substrate by using a dipping method, so as to prepare supported and unsupported thick films. According to the ultrasonic atomization method, copper and gadolinium fully react with sulfur, the reaction speed is high, the yield is high, and the granularity is uniform. The obtained film containing CuGd2S4 nanoparticles has strong near-infrared sunlight absorption capacity. Thus, the powder and the film have the advantages of simple process, low cost, convenience in operation and high synthesis efficiency and can be expected to be applied to near-infrared absorption materials for solar heat shielding.

Description

technical field [0001] The invention relates to a solar heat insulation material, in particular to a preparation method of nanometer copper gadolinium sulfide powder and a thin film containing nanometer copper gadolinium sulfide. Background technique [0002] Solar heat insulation materials mainly include heat reflective glass and low-emissivity glass, which can effectively isolate near-infrared light and have high visible light transmission performance. Heat reflective glass is a metal or metal oxide film formed on the surface of the glass. Its high reflection of near-infrared sunlight achieves the purpose of heat insulation, but its high reflection of visible light is easy to cause light pollution. Low-emissivity glass is to deposit a dielectric layer, a barrier layer and a nano-metal layer on the surface of the glass, and achieve the effect of heat insulation through the mid-to-far infrared rays radiated by high-reflection indoor thermal objects. For example, the inventi...

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Problems solved by technology

Heat reflective glass is a metal or metal oxide film formed on the surface of the glass. Its high reflection of near-infrared sunlight achieves the purpose of heat insulation, but its high reflection of visible light is easy to cause light pollution.

Low-emissivity glass is to deposit a dielectric layer, a barrier layer and a nano-metal layer on the surface of the glass, and achieve the effect of heat insulation through the mid-to-far infrared rays radiated by high-reflection indoor thermal objects. For example, the invention patent application with the publication number CN102092960 is a medium Layer-barrier layer-silver layer-transition layer-barrier layer-dielectric layer-glass; multilayer deposition expensive large-scale equipment, complex manufacturing process, high manufacturing cost

The invention patent with the publication number CN1745149A discloses that composite tungsten oxide nanopowder is used as the main material, and resin or glass is used as the medium to form a surface plasmon resonance absorption effect to realize the absorption of near-infrared light and achieve the absorption of sunlight. Shielding effect, but the absorption effect is greatly affected by the shape, size and surrounding medium of the nanostructure. This invention obtains tungsten oxide by hydrolyzing and dissolving tungsten chloride in alcohol. The particle size distribution is uneven, resulting in large differences in product performance

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