rGO/Ce掺杂SnO2复合纳米纤维的制备及H2S气敏性能研究  

Preparation and H2S Sensing Properties of rGO/Ce-doped SnO2 Nanofibers

作　　者：王新昌[1] 高慧然 王英华 郭梦辉 许婷婷[1] 王雨萌 贾建峰[1] WANG Xinchang;GAO Huiran;WANG Yinghua;GUO Menghui;XU Tingting;WANG Yumeng;JIA Jianfeng(College of Physics and Engineering,Zhengzhou University,Zhengzhou 450052,China;Zhengzhou Sino-Crystal Diamond Co.,LTD,Zhengzhou 450001,China)

机构地区：[1]郑州大学物理工程学院,河南郑州450052 [2]郑州华晶金刚石股份有限公司,河南郑州450001

出　　处：《信阳师范学院学报（自然科学版）》2019年第3期443-448,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11504331);河南省教育厅科学技术研究重点项目(13A140691)

摘　　要：采用静电纺丝法制备还原氧化石墨烯(rGO)/SnO2复合纳米纤维,研究了Ce掺杂及掺杂量对rGO/SnO2纳米纤维的微结构与气敏性能的影响.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM,带SAED)、X射线衍射仪(XRD)及拉曼光谱仪(Raman)对复合纳米纤维的结构与形貌进行表征.结果表明:不同含量Ce掺杂对复合纳米纤维的晶体结构和形貌均无明显影响.气敏测试结果表明:不同的Ce掺杂量均能改善rGO/SnO2纳米纤维对H2S的灵敏度,在Ce掺杂摩尔分数为3%时复合材料对H2S具有最佳的气敏性能,在75℃时5μL/LH2S气体的灵敏度高达300,同时选择性和响应恢复性能也均有显著提高.The reduced graphene oxide(rGO)/SnO2 nanofibers were prepared via a simple electrospinning method.The effects of Ce doping and doping amount on the microstructure and sensing properties of rGO/SnO2 nanofibers were studied.The morphology and structure of thenanofibers were characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM),X-ray diffraction (XRD) and Raman spectroscopy.It was found that Ce doping did not change the morphology and crystal structures of the nanofibers.Gas sensing results showed that different Ce doping could improve the sensitivity of rGO/SnO2 nanofibers to H 2S.The composite had the best gas sensitivity to H 2S when the Ce doping mole fraction was 3%,at 75 ℃.The sensitivity of 5 μL/L H 2S gas was up to 300,and the selectivity and response recovery performance were also significantly improved.

关 键 词：rGO/SnO2纳米纤维 CE掺杂 H2S 气敏性能 

分 类 号：TB381[一般工业技术—材料科学与工程]