CAS Key Laboratory of Materials for Energy Conversion and , Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China.
ACS Appl Mater Interfaces. 2011 Dec;3(12):4573-9. doi: 10.1021/am200781e. Epub 2011 Nov 22.
The gasochromic performance and durability of WO(3)-based films can be improved by doping SiO(2) particles within WO(3) matrix forming nanoporous supporting network and dispersing Pd catalyst inside films with enhanced catalytic activity. Nanoporous WO(3)-SiO(2) composite films loaded with Pd catalyst were prepared by sol-gel dip-coating process and served as an active chromogenic layer to fabricate a double-glazed gasochromic device. The structure, morphology, optical properties and gasochromic performance of WO(3)-SiO(2) films were fully investigated. The WO(3)-SiO(2) films exhibit excellent gasochromic performance with ultrafast coloring rate of 14.8% per second (%/s) (WO(3): 2.84%/s) and bleaching rate of 44.1%/s (WO(3): 7.18%/s). The transmittance changed between 17.8 and 74.6% during coloring-bleaching cycles, and totally reversibility and stability were achieved.
通过在 WO(3) 基质中掺杂 SiO(2) 颗粒形成纳米多孔支撑网络，并在薄膜内分散具有增强催化活性的 Pd 催化剂，WO(3) 基薄膜的气致变色性能和耐久性可以得到改善。采用溶胶-凝胶浸渍法制备了负载 Pd 催化剂的纳米多孔 WO(3)-SiO(2) 复合薄膜，用作活性显色层，以制备双层气致变色器件。充分研究了 WO(3)-SiO(2) 薄膜的结构、形貌、光学性能和气致变色性能。WO(3)-SiO(2) 薄膜表现出优异的气致变色性能，超快着色率为 14.8%/秒（WO(3)：2.84%/秒）和漂白率为 44.1%/秒（WO(3)：7.18%/秒）。在着色-漂白循环过程中，透光率在 17.8%和 74.6%之间变化，实现了完全的可逆性和稳定性。
