Rubidium, cesium tungsten bronze powders and their transparent and thermal insulative thin films

Abstract:

In order to investigate the properties of rubidium tungsten bronze and cesium tungsten bronze nanopowders with different shapes and their film, rubidium and cesium tungsten bronze nanopowders were prepared by hydrothermal reaction and a subsequent heat-treatment. Tungsten bronze transparent insulation film was prepared by spin coating method on a piece of glass. The synthesized powders were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy, and the photothermal properties of the powders were studied. The near infrared shielding performance and heat insulation performance of tungsten bronze films were analyzed by UV-Vis NIR spectroscopy. The results show that the tungsten bronze nanopowders after heat treatment have excellent photothermal properties and have a promising application prospect in cancer photothermal therapy. Compared with the film made by rod-shaped powers, the film made by laminar rubidium and cesium-tungsten bronze powders have higher near-infrared shielding performance of 95% and 98.8%, respectively. Compared with blank glass, the indoor temperature using glass with laminar rubidium and cesium tungsten bronze films decreased by 9.4℃ and 8.5℃ respectively. In summary, sheet rubidium and cesium tungsten bronze have excellent near-infrared shielding performance, and have great application prospects in the fields of energy saving and photothermal therapy.