Highly sensitive acetone sensors based on Y-doped SnO₂ prismatic hollow nanofibers synthesized by electrospinning

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• 作者：L. ChengAuthor Vitae ; S.Y. Ma ; ^{chengliang8715@163.com" class="auth_mail}Author Vitae ; X.B. LiAuthor Vitae ; J. LuoAuthor Vitae ; W.Q. LiAuthor Vitae ; F.M. LiAuthor Vitae ; Y.Z. MaoAuthor Vitae ; T.T. WangAuthor Vitae ; Y.F. LiAuthor Vitae
• 关键词：Y-doped SnO2 ; Electrospinning ; Hollow nanofiber ; Gas sensor ; Gas sensing mechanism
• 刊名：Sensors and Actuators B: Chemical
• 出版年：September 2014
• 年：2014
• 卷：200
• 期：Complete
• 页码：181-190
• 全文大小：3458 K

文摘

Pure and Y-doped SnO₂ hollow nanofibers with porous structures were fabricated via electrospinning technique and calcination procedure. The porous SnO₂ hollow nanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) and X-ray photoelectron spectroscopy (XPS). Acetone sensing properties of the hollow nanofibers were also investigated. The surface morphology of pure SnO₂ and Y-doped SnO₂ possessed a hollow nanostructure with rough porous surface after being annealed at 600 °C, and the diameters of the nanofibers were in the range of 154–200 nm. The BET surface area measurement further indicated that the surface textural was mesoporous, and the pore size was calculated above 24 nm by Barret–Joyner–Halenda (BJH). Gas sensing properties revealed that Y-doped SnO₂ hollow nanofibers exhibited a much higher response to acetone vapor than pure SnO₂ hollow nanofibers at 300 °C. Y-doped SnO₂ hollow nanofibers exhibited good stability and excellent selectivity, which were ascribed to the 1D hollow nanostructure and the effect of Y doping. The formation mechanism and the acetone sensing mechanism of SnO₂ hollow nanofibers were also discussed.