基于还原氧化石墨烯(rGO)/α-Fe_2O_3纳米纤维的制备及其气敏性研究

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• 英文论文题名：Reduced Graphene Oxide/α-Fe_2O_3 Composite Nanofibers for Application in Gas Sensors
• 论文作者：郭兰兰 ; 寇雪莹 ; 孙彦峰 ; 卢革宇
• 英文论文作者：Lanlan Guo ; Xueying Kou ; Yanfeng Sun ; Geyu Lu ; State Key Laboratory on Integrated Optoelectronics ; College of Electronic Science and Engineering ; Jilin University
• 年：2016
• 作者机构：吉林大学电子科学与工程学院;
• 论文关键词：还原氧化石墨烯 ; α-Fe2O3 ; 静电纺丝 ; p-n异质结 ; 丙酮
• 英文论文关键词：Reduced graphene oxide ; α-Fe2O3 ; electrospinning ; p-n heterojunctions ; acetone
• 会议召开时间：2016-11-18
• 会议录名称：中国第四届静电纺丝大会（CICE 2016）摘要集
• 语种：中文
• 分类号：TQ340.64
• 学会代码：ZGNM
• 会议名称：中国第四届静电纺丝大会(CICE 2016)
• 会议地点：中国北京
• 主办单位：中国复合材料学会超细纤维材料分会（筹）
• 学会名称：中关村科创纳米技术创新研究会
• 页数：1
• 文件大小：541k
• 原文格式：D
• 会议级别：全国

摘要

本文采用单轴静电纺丝的方法成功的制备了α-Fe_2O_3纳米带以及1.0 wt%rGO/α-Fe_2O_3的复合纳米纤维。之后,我们用大量的技术手段对其结构和形貌进行了表征。结果显示,纯的α-Fe_2O_3纳米带的宽度大概是200nm,而1.0 wt%r GO/α-Fe_2O_3复合纳米线纤维的直径大概是100 nm。除此之外,我们还对其气敏性能分别做了测试。1.0 wt%r GO/α-Fe_2O_3复合纳米线纤维在375°C对100 ppm丙酮有很好的响应、重复性和长期稳定性,其响应值为8.9,是纯α-Fe_2O_3纳米带的4倍。最后我们对r GO/α-Fe_2O_3纳米纤维的气敏机理做了推测和解释。我们认为,还原氧化石墨烯和α-Fe_2O_3之间存在着的欧姆接触,空气中烧结后还原氧化石墨烯自身的缺陷以及两者之间存在的纳米级p-n异质结起着关键的作用。
Pure α-Fe_2O_3 nanobelts(NBs) and 1.0 wt% reduced graphene oxide(r GO)/α-Fe_2O_3 composite nanofibers(NFs) have been successfully synthesized by a homotaxial electrospinning method. Various techniques were employed for the characterization of the nanostructure and morphologies. The results indicate that pure α-Fe_2O_3 NBs have uniform widths about 200 nm andr GO/α-Fe_2O_3 NFs have diameters approximately 100 nm. In addition, the gas sensing properties were also investigated. It is found that 1wt% r GO/α-Fe_2O_3 shows good response, excellent repeatability and long-term stability to 100 ppm acetone at 375 °C, which is superior to other nanofibers. The response of 1 wt%r GO/ α-Fe_2O_3 nanofibers to 100 ppm acetone is about 8.9, which is about 4 times higher than pure α-Fe_2O_3 NBs. Finally, we have proposed that the creation of ohmic contact, defects on the r GO nanosheets surface and local p-n heterojunctions play significant roles in raising the sensitivity ofr GO/α-Fe_2O_3 NFs.

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