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A systematic investigation of the synthesis of homogenous CsxWO3 nanorods by a designed water-controlled release process was carried out. The results revealed that the uniform rod-like CsxWO3 nanoparticles with a Cs/W atomic ratio of ca. 0.33 can be obtained by using 20 vol% CH3COOH–80 vol% CH3CH2OH mixed solution as a reaction solvent at 240 °C for 20 h. The morphology of products were changed depending on the speed of water-releasing process, meanwhile, the Cs/W atomic ratio could be controlled by both the amount of released water and the reaction temperature. CsxWO3 nanorods showed a high transmittance in the visible light region and excellent shielding ability of near infrared (NIR) lights, indicating that CsxWO3 nanorods have a suitable characteristic as solar filter applications.
Guo et al. (2011) studied this question.