Vanadium Dioxide Nanoparticle-based Thermochromic Smart Coating: High Luminous Transmittance, Excellent Solar Regulation Efficiency, and Near Room Temperature Phase Transition

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• 作者：Jingting Zhu ; Yijie Zhou ; Bingbing Wang ; Jianyun Zheng ; Shidong Ji ; Heliang Yao ; Hongjie Luo ; Ping Jin
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 23, 2015
• 年：2015
• 卷：7
• 期：50
• 页码：27796-27803
• 全文大小：560K
• ISSN：1944-8252

文摘

An annealing-assisted preparation method of well-crystallized V_xW_1–xO₂(M)@SiO₂ core–shell nanoparticles for VO₂-based thermochromic smart coatings (VTSC) is presented. The additional annealing process reduces the defect density of the initial hydrothermally prepared V_xW_1–xO₂(M) nanoparticles and enhances their crystallinity so that the thermochromic film based on V_xW_1–xO₂(M)@SiO₂ nanoparticles can exhibit outstanding thermochromic performance with balanced solar regulation efficiency (ΔT_sol) of 17.3%, luminous transmittance (T_lum) up to 52.2%, and critical phase transition temperature (T_c) around 40.4 °C, which is very promising for practical application. Furthermore, it makes great progress in reducing T_c of VTSC to near room temperature (25.2 °C) and simutaneously maintaining excellent optical properties (ΔT_sol = 14.7% and T_lum = 50.6%). Such thermochromic performance is good enough to make VTSC applicable to practical architecture.