Morphology controllable preparation and infrared emissivity of vanadium pentoxide

Vanadium pentoxide (V2O5) with different morphologies including nanorods, nanoparticles and microparticles have successfully been synthesized by surfactants assisted hydrothermal method combined with a post-annealing process. Structure, morphology and emissivity of the obtained V2O5 have been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and infrared emissivity (IR-2). The results show that the morphologies of V2O5 play a key role in affecting the infrared emissivity. V2O5 nanorods show more excellent infrared emissivity (0.908 in wavelength of 3-5 μm, 0.986 in wavelength of 8-14 μm and 0.965 in wavelength of 1-22 μm) than that of V2O5 nanoparticles and microparticles.