Preparation of YVO4 octahedral nanomaterials and gas-sensing characteristics to triethylamine

Pure YVO4 octahedral nanomaterials were obtained by hydrothermal method and acidification treatment. Through the characterization, the XRD results showed that the prepared sample was high purity YVO4 with a tetragonal structure. Moreover, the prepared YVO4 was octahedral nanomaterials with rough surfaces, which was observed by SEM and TEM. XPS analysis showed that the prepared YVO4 material had surface adsorption oxygen. In addition, the novel gas sensor based on n-type polycrystalline YVO4 octahedral nanomaterials with rough surfaces had a low operating temperature of 200 ℃ for triethylamine, as well as appropriate selectivity and response/recovery time, good stability and repeatability. Therefore, octahedral YVO4 may be a promising gas sensitive material.