Hydrothermal synthesis of W and Mo co-doped VO2(B) nanobelts

W and Mo co-doped VO2(B) nanobelts which used formic acid as reduction acid, NH4VO3 as vanadium source, (NH4)6W7O24 · 6H2O and (NH4)6Mo7O24 · 4H2O as doped sources were synthesised by the hydrothermal method. The samples were characterised by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). TEM and HRTEM images showed the samples had a length of 1 µm and a width of 100 nm. XRD, FTIR and XPS spectra revealed that Mo6+ and W6+ incorporated into the VO2(B) lattice and formed solid-solution phases with VO2(B).