Cesium tungsten bronze nanopowder for kitchen thermal insulating glass coating has good near-infrared shielding performance, that is, the ability to shield heat radiation from the sunlight. And it is important to know the NIR photothermal conversion property of nano particle size cesium tungsten bronze.
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The experts investigated the NIR photothermal conversion property of Cs0.33WO3 nanoparticles in deionized water at different concentrations. The aqueous dispersion of Cs0.33WO3 nanoparticles was added to a 2-mL polystyrene cell, and then the dispersion was exposed to an 808-nm diode laser with an irradiation area of 0.3 cm2 and an intensity of 820 mW. The temperature of aqueous dispersion was detected with a thermocouple. For the study on the photothermal stability of Cs0.33WO3 nanoparticles under NIR irradiation, the aqueous dispersion of Cs0.33WO3 nanoparticles (0.08 wt.%) was continuously re-exposed to an 808-nm diode laser (2.73 W/cm2) for 5 cycles. For each cycle, the aqueous dispersion was irradiated for 10 min and then cooled to the initial temperature. Using a thermocouple, the variation of temperature with time was monitored.
