Abstract
In this study, vanadium dioxide was doped with titanium (0~0.5 at %) to improve thermochromic properties. The titanium doped vanadium dioxide (Ti-VO2) particles were prepared via thermolysis process using vanadyl sulfate, ammonium bicarbonate and titianium chloride as precursors. The crystal structure, morphology, chemical bonding and thermochromic pro- perties were investigated by using XRD, FE-SEM, XPS, DSC and UV-Vis-NIR spectroscopy. It was found that titanium was successfully doped into the crystal lattice of VO2 and the obtained Ti-VO2 particles have monoclinic structure. With increasing Ti concentration, the particle size and phase transition temperature of Ti-VO2 particles decreased and NIR switching efficiency increased.
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