Electrospun nanowebs of NiO/SnO 2 p-n heterojunctions for enhanced gas sensing
Electrospun nanowebs of NiO/SnO 2 p-n heterojunctions for enhanced gas sensing
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DOI：
10.1016/j.apsusc.2016.07.073
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发表时间：
2016-12
影响因子：
6.7
通讯作者：
Yun Wang;Hui Zhang;Xuhui Sun
中科院分区：
文献类型：
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作者：
Yun Wang;Hui Zhang;Xuhui Sun
采用简单的静电纺丝、热压和煅烧工艺成功制备了p型NiO/n型SnO 2异质结的静电纺丝薄膜。采用扫描电子显微镜、高分辨透射电子显微镜、X射线光电子能谱仪和X射线衍射仪对SnO 2/NiO纳米粒子的形貌、化学成分和微观结构进行了表征。煅烧后，得到了具有高比表面积的较细的多孔纳米纤维。对100 ppm乙醇的响应（Ra/Rg= 27.5）比纯SnO_2-NiO_2-SiO_2此外，该传感器还具有高重现性和长期稳定性。这种简单的方法是通用的合成其他材料与多层膜不同的气体传感器，并可以扩展到各种实际应用。
Electrospun nanowebs ofp-type NiO/n-type SnO2heterojunctions were successfully fabricated using a simple electrospinning process followed by thermo-compression and subsequent calcination processes. The morphology, chemical composition and microstructure of the as-spun SnO2/NiO nanowebs were well characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. After the calcination, the thinner and porous nanofibers with a high surface area were obtained. The response of the SnO2/NiO nanowebs sensor (Ra/Rg= 27.5) is 1 order of magnitude higher than that of the pure SnO2nanowebs sensor toward 100 ppm of ethanol with average response and recovery times of ∼2.9 and ∼4.7 s, respectively. Furthermore, the sensor also exhibits high reproducibility and long-term stability. This facile process is versatile for the synthesis of other materials with multilayer nanowebs for different gas sensors and can be extended for various practical applications.