Preparation of VO2/Al-O core-shell structure with enhanced weathering resistance for smart window |
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| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. National Institute of Advanced Industrial Science and Technology (AIST), Moriyama, Nagoya 463-8560, Japan;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. Graduate School of Chinese Academy of Sciences, Beijing 100049, China;3. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Rd. 1295, Changning District, Shanghai 200050, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China;3. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan;1. Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, PR China;2. Fuli Institute of Food Science, Zhejiang University, Hang Zhou 310058, PR China |
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| Abstract: | VO2/Al-O core-shell structure (V/AO) was synthesized by a facile method and its application for thermochromic film on smart window was investigated. Comparisons of thermochromic properties and stabilities in different environments between VO2 and annealed V/AO nanoparticles were made. As a result, VO2 nanoparticle was easily oxidized and lost thermochromic property. In contrast, with the protection provided by Al-O-based shell, the VO2 core remained stable at a high temperature (350 °C in air) and in H2O2 solution. Especially, thermochromic films made by annealed V/AO nanoparticles almost kept thermochromic performance in damp heating environment (T=60 °C, RH=90%) for 20 days while VO2 films lost their thermochromic properties after 3 days. Besides, the degradation progress of VO2 and V/AO nanoparticles in damp heating environment was also explored. Results indicate that Al-O-based shell provides a good protection for the VO2 core originated from the compact structure of shell, which effectively prevents oxygen and water from eroding VO2. In summary, the VO2 nanoparticles coated with Al-O-based shell exhibit a great potential in the application of smart window. |
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| Keywords: | Vanadium dioxide Al-O-based shell Stability Thermochromic Smart window |
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