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- W3136145845 abstract "Abstract WO3-TiO2 heterostructural nanofibers (HNFs) were prepared by a simple spin coating method. The structures, chemical constitutions and morphologies of the samples were characterized by various kinds of techniques, including XRD, XPS, EDX, BET, SEM and TEM. The results suggested that WO3 nanoparticles with a size range of 20–30 nm were decorated uniformly on the surface of TiO2 nanofibers in the WO3-TiO2 composite thin films. XPS results confirmed the existence of W5+and the increased amount of both chemisorbed oxygen species and oxygen vacancies after the WO3 nanoparticles were decorated on the surface of TiO2 nanofibers. Compared with the pure materials, the WO3-TiO2 HNFs exhibited higher response (78.21 ± 0.35) %), rapid response (20 s) and recovery time (23 s), better selectivity and long term stability towards H2 gas. The gas-sensitive properties improvement of WO3-TiO2 composite is due to high surface area, which leaded to an increase of the gas adsorption sites. Moreover, the Fermi level effect of the composite metal oxide heterojunction formed by TiO2 and WO3 also markedly enhanced the gas sensitivity properties of the composite samples." @default.
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- W3136145845 date "2021-07-01" @default.
- W3136145845 modified "2023-10-04" @default.
- W3136145845 title "TiO2 nanofibers decorated with monodispersed WO3 heterostruture sensors for high gas sensing performance towards H2 gas" @default.
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- W3136145845 doi "https://doi.org/10.1016/j.inoche.2021.108663" @default.
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