Cs doped tungsten oxide nanoparticles may be used to prepare thermal insulation dispersion with excellent near infrared absorbing ability. Wherein, Cs doped tungsten oxide nanoparticles can be synthesized by using sodium tungstate and cesium carbonate as raw materials, and citric acid as a reducing agent under hydrothermal conditions. The obtained nanoparticles are Cs0.32WO3 nano powders with a hexagonal phase structure, which exhibit strong near-infrared absorption performance in the near-infrared region, and the highest absorbance at the wavelength of 1100nm can reach 1.96.

Cs doped tungsten oxide nanoparticles are well-known as cesium tungsten bronze nanoparticles, which are often used in the preparation of thermal insulation dispersion liquid. And the prepared dispersion liquid is mainly used in the production of transparent heat-insulating glass coating, which is widely applied for heat insulation of automobiles and buildings. Well, do you know how to prepared Cs doped tungsten oxide nanoparticles?

Cs doped tungsten oxide nanoparticles, that is, cesium tungsten bronze nanoparticles or CsxWO3 nanoparticles, are well-known as an infrared ultraviolet shielding material or a functional material with excellent near-infrared shielding performance. In recent years, with the promotion of cesium-doped tungsten oxide, its preparation has become more and more popular among scholars.

Cs doped tungsten oxide nanoparticles are often applied to produce transparent thermal insulation material such heat insulation film and heat insulation coating as the absorbance of such a functional material is high in the near-infrared region, and the absorbance increases with the increase of the wavelength in the visible and near-infrared regions. But why does the absorbance of cesium tungsten bronze increase with the increase of wavelength in the visible and near infrared regions?