The Potential Applications of W- and Mo-doped VO_2 Nanobelts to the Functional Packaging Materials

摘要

The first-order metal-sinsulator phase transition in VO_2 is characterized by an ultrafast several orders of magnitude change in optical transmittance and electrical conductivity, which makes VO_2 an attractive candidate for the potential application in thermochromic coatings and functional packaging materials. Herein, W- and Mo-doped VO_2 nanobelts were successfully synthesized by a facile hydrothermal method. The as-obtained products were characterized by X-ray powder diffraction (XRD), X-ray photoelecton spectroscopy (XPS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR). The results revealed that W or Mo atoms were successfully doped into the crystal lattice of VO_2 matrix. It was found that the phase transition temperature of doped VO_2 could be simply tuned by changing the doping concentration of W or Mo atoms. Furthermore, the variable-temperature infrared spectra disclosed that the doped VO_2(M) had novel optical switching properties, indicating that the as-obtained products can be used as the intelligent packaging materials.