Synthesis,characterization, and thermodynamic parameters of vanadium dioxide |
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| Authors: | Ji Qi Guiling Ning Yuan Lin |
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| Affiliation: | 1. Department of Chemical Engineering of Material, School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, China;2. Department of Chemical Engineering, Dalian Life Science College, Dalian Nationalities University, 18 Laohe West Road, Dalian 116600, China;1. Université catholique de Louvain, Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Louvain-la-Neuve, Belgium;2. XLIM Research Institute, UMR 7252, CNRS/Université de Limoges, Limoges, France;1. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;2. Singapore-HUJ Alliance for Research and Enterprise (SHARE), Nanomaterials for Energy and Energy-Water Nexus (NEW), Campus for Research Excellence and Technological Enterprise (CREATE), 138602, Singapore;3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;4. Institute of Chemistry, Edmund Safra Campus, The Hebrew University, Jerusalem 91904, Israel;1. College of Physics Science and Technology, Institute of Thin Film Physics and Applications, Shenzhen University, 518060, China;2. Shenzhen Key Laboratory of Sensor Technology, Shenzhen University, 518060, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai, 200050, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Center of Innovation and Development in Construction, Tongji University, Siping 1239, Yangpu, Shanghai, China;4. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560, Japan |
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| Abstract: | A novel process was developed for synthesizing pure thermochromic vanadium dioxide (VO2) by thermal reduction of vanadium pentoxide (V2O5) in ammonia gas. The process of thermal reduction of V2O5 was optimized by both experiments and modeling of thermodynamic parameters. The product VO2 was characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TG), and differential scanning calorimetry (DSC). The experimental results indicated that pure thermochromic VO2 crystal particles were successfully synthesized. The phase transition temperature of the VO2 is approximately 342.6 K and the enthalpy of phase transition is 44.90 J/g. |
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