Highly Ordered Mesoporous Tungsten Oxides with a Large Pore Size and Crystalline Framework for H2S Sensing1. (2nd July 2014)

• Record Type: Journal Article
• Authors: Li, Yuhui; Luo, Wei; Qin, Nan; Dong, Junping; Wei, Jing; Li, Wei; Feng, Shanshan; Chen, Junchen; Xu, Jiaqiang; Elzatahry, Ahmed A.; Es‐Saheb, Mahir H.; Deng, Yonghui; Zhao, Dongyuan
• Is Part Of: Angewandte Chemie. Volume 126:Number 34(2014)
• Page Start: 9181
• Page End: 9186
• Publication Date: 2014-07-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201403817
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>An ordered mesoporous WO₃ material with a highly crystalline framework was synthesized by using amphiphilic poly(ethylene oxide)‐<italic>b</italic>‐polystyrene (PEO‐<italic>b</italic>‐PS) diblock copolymers as a structure‐directing agent through a solvent‐evaporation‐induced self‐assembly method combined with a simple template‐carbonization strategy. The obtained mesoporous WO₃ materials have a large uniform mesopore size (ca. 10.9 nm) and a high surface area (ca. 121 m² g⁻¹). The mesoporous WO₃‐based H₂S gas sensor shows an excellent performance for H₂S sensing at low concentration (0.25 ppm) with fast response (2 s) and recovery (38 s). The high mesoporosity and continuous crystalline framework are responsible for the excellent performance in H₂S sensing.</p> </abstract>