Improved Hydrogen Monitoring Properties Based on p-NiO/n-SnO2 Heterojunction Composite Nanofibers

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• 作者：Zhaojie Wang ; Zhenyu Li ; Jinghui Sun ; Hongnan Zhang ; Wei Wang ; Wei Zheng ; Ce Wang
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：April 8, 2010
• 年：2010
• 卷：114
• 期：13
• 页码：6100-6105
• 全文大小：337K
• 年卷期：v.114,no.13(April 8, 2010)
• ISSN：1932-7455

文摘

Here we demonstrate the preparation and improved hydrogen monitoring properties based on p-NiO/n-SnO₂ heterojunction composite nanofibers via the electrospinning technique and calcination procedure. NiO/SnO₂ heterojuction composite nanofibers were spin-coated on the ceramic tube with a pair of Au electrodes for the detection of hydrogen. Extremely fast response−recovery behavior (3s) has been obtained at the operable temperature of 320 °C, based on our gas sensor, with the detection limit of approximate 5 ppm H₂. The role of the addition of NiO into the SnO₂ nanofibers and the sensing mechanism has also been discussed in this work.