rGO/NiO复合纳米纤维的制备及室温气敏性能  

Preparation and Room Temperature Gas Sensing Properties of rGO/NiO Composite Nanofibers

作　　者：贾建峰[1] 杨辉[1] 王英华 高慧然 王新昌[1] JIA Jianfeng;YANG Hui;WANG Yinghua;GAO Huiran;WANG Xinchang(College of Physics and Engineering,Zhengzhou University,Zhengzhou 450001,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450001 [2]郑州华晶金刚石股份有限公司,河南郑州450001

出　　处：《郑州大学学报（理学版）》2018年第4期64-69,共6页Journal of Zhengzhou University:Natural Science Edition

基　　金：河南省高等学校青年骨干教师计划项目(2010GGJS-001);河南省教育厅科学技术研究重点项目(13A140691)

摘　　要：以聚乙烯吡咯烷酮(PVP)和乙酸镍(NiC_4H_6O_4·4H_2O)为主要原料,采用静电纺丝技术分别制备纯氧化镍(NiO)纳米纤维及还原氧化石墨烯(rGO)/NiO复合纳米纤维.利用X射线衍射仪、扫描电子显微镜和透射电子显微镜对材料的结构和形貌进行了表征.透射电子显微镜观察结果直观证实了rGO/NiO复合纳米纤维中rGO成分的存在,而且rGO复合对NiO纳米纤维的晶体结构及形貌均无明显影响.以H_2S为主要目标气体,研究了rGO复合对NiO纳米管纤维气敏性能的影响,发现rGO复合显著提高了NiO纳米纤维对H_2S气体的敏感性,特别是1.0%rGO复合量的NiO纳米纤维对H_2S气体具有最佳的气敏性能,其对体积分数为10×10^(-6)的H_2S气体的室温灵敏度可达167.11,是纯NiO纳米纤维的23.8倍.Pristine NiO nanofibers and rGO/NiO composite nanofibers were prepared by electrospinning with polyvinylpyrrolidone（PVP） and nickel acetate（NiC4H6O4·4 H2O） as raw materials. X-ray diffraction（XRD）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM） were used to confirm the structural and morphological properties of these nanofibers. The presence of rGO in the rGO/NiO composite nanofibers was detected by TEM in spite of no obvious morphologic difference between pristine NiO nanofibers and rGO/NiO composite nanofibers. A comparative H2S gas sensing study between pristine NiO nanofibers and rGO/NiO composite nanofibers was conducted. The rGO/NiO composite nanofibers were found to be more sensitive to H2S gas than the pristine NiO nanofibers at room temperature, indicating the significant influences of rGO on the sensing property. Moreover, the sensor based on 1.0% rGO composited NiO nanofibers exhibited the best gas sensing performance. The sensitivity of NiO nanofibers with 1.0% rGO to 10×10^-6 H2S gas attained 167.11 at room temperature, which was 23.8 times higher than the value of pristine NiO nanofibers.

关 键 词：rGO/NiO 纳米纤维 室温气敏性能 静电纺丝 

分 类 号：TB381[一般工业技术—材料科学与工程]