Highly sensitive acetone sensors based on Y-doped SnO2 prismatic hollow nanofibers synthesized by electrospinning
Highly sensitive acetone sensors based on Y-doped SnO2 prismatic hollow nanofibers synthesized by electrospinning
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DOI：
10.1016/j.snb.2014.04.063
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发表时间：
2014-09-01
影响因子：
8.4
通讯作者：
Li, Y. F.
中科院分区：
文献类型：
--
作者：
Cheng, L.;Ma, S. Y.;Li, Y. F.
采用静电纺丝技术和煅烧工艺制备了具有多孔结构的纯SnO 2和Y掺杂SnO 2中空纳米纤维。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、比表面积（BET）和X射线光电子能谱（XPS）对多孔SnO 2中空纳米纤维进行了表征。研究了空心纳米纤维的丙酮传感特性。纯SnO 2和Y掺杂SnO 2在600 ℃退火后的表面形态为空心纳米结构，表面粗糙多孔，纳米纤维的直径在154-200 nm范围内。BET比表面积测量进一步表明表面结构是介孔的，并且通过Barret-Joyner-Halenda（BJH）计算的孔径大于24 nm。气敏性能表明，Y掺杂的SnO 2中空纳米纤维表现出更高的响应丙酮蒸气比纯SnO 2中空纳米纤维在300 ℃。Y掺杂的SnO 2中空纳米纤维具有良好的稳定性和优异的选择性，这归因于一维中空纳米结构和Y掺杂的影响。对SnO 2中空纳米纤维的形成机理和丙酮传感机理进行了探讨。(C)2014爱思唯尔有限公司版权所有。
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 degrees 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 degrees 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. (C) 2014 Elsevier B.V. All rights reserved.