title: Highly ordered mesoporous tungsten oxides with a large pore size and crystalline framework for H2S sensing.
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 m(2)  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.
authors.affiliation: Department of Chemistry, Advanced Materials Laboratory, and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433 (P. R. China).
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Luo
authors.forename: Nan
authors.initials: N
authors.lastname: Qin
authors.forename: Junping
authors.initials: J
authors.lastname: Dong
authors.forename: Jing
authors.initials: J
authors.lastname: Wei
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Shanshan
authors.initials: S
authors.lastname: Feng
authors.forename: Junchen
authors.initials: J
authors.lastname: Chen
authors.forename: Jiaqiang
authors.initials: J
authors.lastname: Xu
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Elzatahry
authors.forename: Mahir H
authors.initials: MH
authors.lastname: Es-Saheb
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Deng
authors.forename: Dongyuan
authors.initials: D
authors.lastname: Zhao
keywords: block copolymers; gas sensing; hydrogen sulfide; mesoporous materials; tungsten oxide