Cs0.32WO3 is also known as cesium tungsten bronze nano powder that can be used to prepare nano-ceramic dispersion solution. And the obtained environmentally-friendly aqueous solution is applied for producing transparent NIR shielding coating. Such heat insulation coating has been widely applied to the buildings and automobiles. So, the preparation of cesium tungsten bronze also attracted much attention. For example, the experts have developed a simple one-step solvothermal route to fabricate Cs0.32WO3 nanoparticles and they found that:
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The addition of Cs+ ions promoted the formation of Cs2WOCl5 crystals, which inhibited the hydrolysis process of WCl6 and limited the formation of hexagonal tunnels. Controlled formation of hexagonal tunnels is favorable for Cs+ ions that completely enter the hexagonal vacant tunnels to form the Cs0.32WO3 crystals. Via a controllable formation process, the superior crystalline Cs0.32WO3 nanoparticles with the primary particle size of 30–60 nm were synthesized at the low temperature of 200 °C and short time of 4 h without any other additives.
