Violet tungsten oxide nanoparticles for producing new energy efficient glass can be prepared by solvothermal method. Compared with other methods, nano violet tungsten oxide prepared by the solvothermal method has high purity, good uniformity, good dispersibility, good crystal form and controllability, low production cost and simple operation.
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Violet tungsten oxide (W18O49 or WO2.72) has a unique near-infrared absorption property, and there are few studies on this property currently, experts said. In recent years, most studies on the synthesis of specific tungsten-oxygen ratio compound W18O49 have focused on nanorods and nanowires. However, there are few studies on the synthesis of W18O49 nanospheres. The preparation of violet tungsten oxide is difficult due to the specific W:O ratio requirement. During the reaction, the reaction conditions are poorly controllable, so that the product is often not pure W18O49, but a mixture of various tungsten oxides. Therefore, how to prepare W18O49 nanospheres with good performance and high purity is the focus of research at this stage.
