Cable-Like Core–Shell Mesoporous SnO2 Nanofibers by Single-Nozzle Electrospinning Phase Separation for Formaldehyde Sensing |
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Authors: | Dr Dongpo Xu Kangjie Ge Yan Chen Shuyan Qi Dr Jingxuan Qiu Prof Qing Liu |
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Institution: | School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093 P. R. China |
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Abstract: | In this study, we have developed a simple and efficient single-nozzle electrospinning strategy involving the phase separation of polystyrene and poly(vinylpyrrolidone) to construct cable-like core–shell mesoporous SnO2 nanofibers. Compared with traditional multi-axial electrospinning approaches to the synthesis of core–shell nanofibers, the single-nozzle electrospinning process requires no complex multi-axial electrospinning setups or post-treatments, just drying and annealing after electrospinning. The obtained SnO2 nanofibers show promise as a sensing material for formaldehyde at low concentrations, the detection limit being about 1 ppm. Furthermore, the nanofibers exhibited good cycling stability and selectivity, with response and recovery times toward 10 ppm formaldehyde being approximately 18 and 196 s, respectively, at an operating temperature of 195 °C. |
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Keywords: | core–shell structures electrospinning mesoporous materials polymers sensors tin |
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