Synthesis and characterization of F-doped Cs0.33WO3−xFx particles with improved near infrared shielding ability

• F-doped Cs0.33WO3−xFx powders were successfully synthesized by the hydrothermal method.
• HF acid addition could promote the formation of rod-like Cs0.33WO3−xFx particles.
• The near infrared shielding ability of Cs0.33WO3 was further improved by F doping.
• The Cs0.33WO3−xFx films exhibited higher transparent heat insulation than Cs0.33WO3.

F-doped Cs0.33WO3−xFx particles were successfully synthesized by the hydrothermal method with hydrofluoric acid as fluorine source, and a new kind of heat insulating films were prepared from dispersion of Cs0.33WO3−xFx nanoparticles in polyvinyl alcohol (PVA) aqueous solution. The effects of F doping on the crystal structure and morphology of Cs0.33WO3−xFx particles as well as the near-infrared (NIR) shielding ability and heat insulation properties of Cs0.33WO3−xFx films were investigated. The results indicated that HF acid addition could promote the formation of rod-like Cs0.33WO3−xFx particles during hydrothermal synthesis and increase the yield of Cs0.33WO3−xFx powders. Moreover, the as-prepared films from dispersion solution of Cs0.33WO3−xFx particles exhibited higher near-infrared (NIR) shielding ability and heat insulating properties than that of the undoped Cs0.33WO3 film. Particularly, the as-prepared Cs0.33WO3−xFx sample with F/W (molar ratio)=0.45 showed best NIR shielding ability and transparent heat insulating performance. The formation mechanism of nanorod-like particles and the effects of F doping on the properties of Cs0.33WO3−xFx products were discussed.

F-doped Cs0.33WO3−xFx particles were successfully synthesized by the hydrothermal method with hydrofluoric acid as fluorine source. HF acid addition in the precursor solution could increase the yield of Cs0.33WO3−xFx powders and promote the formation of rod-like Cs0.33WO3−xFx particles. Moreover, the as-prepared Cs0.33WO3−xFx films from dispersion solution of Cs0.33WO3−xFx particles exhibited higher near-infrared (NIR) shielding ability and heat insulating properties than that of the undoped CsxWO3 film. Particularly, the as-prepared Cs0.33WO3−xFx sample with F/W (molar ratio)=0.45 showed best NIR shielding ability and transparent heat insulating performance. Figure optionsDownload as PowerPoint slide