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Highly Ordered Mesoporous Tungsten Oxides with a Large Pore Size and Crystalline Framework for H2S Sensing |
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| Authors: | Yuhui Li Wei Luo Nan Qin Dr Junping Dong Jing Wei Wei Li Shanshan Feng Junchen Chen Prof?Dr Jiaqiang Xu Dr Ahmed A Elzatahry Dr Mahir H Es‐Saheb Prof?Dr Yonghui Deng Prof?Dr Dongyuan Zhao |
| Affiliation: | 1. Department of Chemistry, Advanced Materials Laboratory, and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433 (P. R. China);2. Department of Chemistry, College of Science, Shanghai University, Shanghai 200444 (P. R. China);3. Department of Chemistry‐College of Science, King Saud University, Riyadh 11451 (Saudi Arabia);4. Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City for Scientific Research and Technology Applications, New Borg El‐Arab City, P.O. Box: 21934, Alexandria (Egypt);5. Mechanical Engineering Department, King Saud University, P.D. Box 800, Riyadh 11421 (Saudi Arabia) |
| Abstract: | An ordered mesoporous WO3 material with a highly crystalline framework was synthesized by using amphiphilic poly(ethylene oxide)‐b‐polystyrene (PEO‐b‐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. |
| Keywords: | block copolymers gas sensing hydrogen sulfide mesoporous materials tungsten oxide |
