Journal
SCIENCE CHINA-MATERIALS
Volume 64, Issue 10, Pages 2486-2496Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-020-1646-9
Keywords
monomicelles; dual mesoporous metal oxides; nanofibers; beam stream; ethylbenzene
Categories
Funding
- Innovation Program of Shanghai Municipal Education Commission [2021-01-07-00-03-E00109]
- National Natural Science Foundation of China [51822202, 51772050]
- Science and Technology Commission of Shanghai Municipality [19520713200]
- Shanghai Sailing Program [20YF1400500]
- Shanghai Rising-Star Program [18QA1400100]
- Key Basic Research Program of Science and Technology Commission of Shanghai Municipality [20JC1415300]
- Shanghai Natural Science Foundation [20ZR1401500]
- Shanghai Scientific and Technological Innovation Project [19JC1410400]
- Fundamental Research Funds for the Central Universities [2232020D-02]
- Youth Top-notch Talent Support Program of Shanghai
- DHU Distinguished Young Professor Program
- Australian Research Council [FT180100387]
- Australian Research Council [FT180100387] Funding Source: Australian Research Council
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A facile strategy to synthesize 1D bimodal mesoporous metal oxides nanofibers through assembling organic-inorganic composite monomicelles in a beam stream has been demonstrated. The fabricated WO3 and its derivatives exhibit uniform continuous fibrous structure with dual mesopore sizes and large surface area. Gas sensors made by Pd-decorated mesoporous WO3 NFs display outstanding sensing performance to ethylbenzene, making them promising for rapid environmental monitoring.
The assembly of monomicelles along one-dimension (1D) to construct tubular or fibrous mesostructures is greatly desired but still challenging. Herein, we have demonstrated a facile strategy to synthesize 1D bimodal mesoporous metal oxides (e.g., WO3, WO3/Pd, WO3/PdCu, TiO2, and ZrO2) nanofibers (NFs) through assembling the organic-inorganic composite monomicelles in a beam stream generated via an electrospinning technique. This facile and repeatable methodology relies on the preparation of copolymer@metal-complex monomicelles in an anisotropic solution and oriented assembly of them in the beam stream by the selective evaporation of solvent. WO3 and its derivatives are chosen as the demo, which show a uniform continuous fibrous structure with dual mesopore sizes (similar to 4.0 and 7.6 nm) and large surface area (similar to 93.1 m(2) g(-1)). Benefitting from the unique textual structure, gas sensors made by Pd-decorated mesoporous WO3 NFs display outstanding comprehensive sensing performance to ethylbenzene, including a high sensitivity (52.5), an ultralow detection limit (50 ppb), and fast response/recovery kinetics (11/16 s) as well as an outstanding selectivity, which render them promising for rapid environmental monitoring.
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