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

• Published in: Journal of alloys and compounds Vol. 897; p. 163167
• Main Authors: Cai, Ya Hui, Ma, Shu Yi, Yang, Ting Ting, Cao, Peng Fei, Wang, Li, Sheng, Hao, Liu, Miao Miao
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.03.2022; Elsevier BV
• Subjects: Acidification; Gas sensor; Gas sensors; Hydrothermal method; Nanomaterials; Octahedral nanomaterials; Operating temperature; Recovery time; Selectivity; Triethylamine; X ray photoelectron spectroscopy; YVO4; Gas sensor; Hydrothermal method; YVO4; Octahedral nanomaterials
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.163167

•YVO4 octahedral were obtained by hydrothermal method and acidification treatment.•Pure YVO4 octahedral nanomaterials were prepared.•The gas sensitivity of YVO4 to triethylamine was studied for the first time.•The gas sensor based on YVO4 has super-duper stability and repeatability at 200 ℃. 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.