静电纺丝法合成Fe掺杂一维NiO纳米纤维及其丙酮气敏性能的研究  

Preparation of Fe-doped One-dimensional NiO Nanofibers by Electrospinning and Their Gas Sensitivity of Acetone Gas

作　　者：王娇[1,2] 石平涛 刘少辉[1] WANG Jiao;SHI Pingtao;LIU Shaohui(Henan Key Laboratory of Electronic Ceramic Materials and Application,College of Materials Engineering,Henan University of Engineering,Zhengzhou 451191,China;Henan International Joint Laboratory of Rare Earth Composite Materials,College of Materials Engineering,Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院材料工程学院河南省电子陶瓷材料与应用重点实验室,郑州451191 [2]河南工程学院材料工程学院河南省稀土复合材料国际联合实验室,郑州451191

出　　处：《中国陶瓷》2023年第3期12-17,共6页China Ceramics

基　　金：国家自然科学基金项目(51902088);河南省高校科技创新人才项目(21HASTIT014);河南省优秀青年基金项目(212300410031)。

摘　　要：采用静电纺丝工艺制备出不同Fe掺杂比例的一维NiO纳米纤维粉体。研究了不同Fe元素掺杂对一维NiO纳米纤维粉体的微观形貌、结构以及丙酮气敏性能的影响,测试结果表明:当Fe元素掺杂浓度较低时,Fe掺杂一维NiO纳米纤维粉体晶体结构未发生变化,均为立方相结构。不同比例Fe元素掺杂NiO粉体均具有良好的一维形貌。与一维NiO纳米纤维纳气敏性能相比,Fe掺杂Ni O纳米纤维粉体的最佳气敏工作温度更低,灵敏度更高,气体选择性相应更好,当Fe元素掺杂量为4%时,一维NiO纳米纤维材料对丙酮气体具有最佳的气敏特性。工作温度为300℃时,纳米纤维对100 ppm丙酮气体灵敏度达到23.2,随着丙酮气体浓度增加,Fe掺杂一维NiO纳米纤维粉体的气敏响应灵敏度呈上升趋势。一维NiO纳米纤维气敏性能的改善可归因于Fe元素掺杂促使NiO粉体的缺陷增多,可以为气敏反应提供更多的反应点,从而提高了其气敏性能。One-dimensional NiO nanofiber powders with different Fe doping ratios were prepared by electrospinning.The effects of different Fe doping contents on the micro morphology,structure and acetone gas sensing properties of NiO one-dimensional nanofiber powder were studied.The test results showed that when the doping concentration of Fe element is low,the crystal structure of Fe-doped one-dimensional NiO nanofiber powders does not change,and all of them have cubic phase structure.NiO powders doped with different proportions of Fe have good one-dimensional morphology.Compared with one-dimensional Nio nanofibers,Fe-doped Nio nanofibers have lower optimal gas-sensitive operating temperature,higher sensitivity and better gas selectivity.When Fe doping is 4%,one-dimensional Nio nanofiber has the best gas sensitivity to acetone gas.When the working temperature is 300℃,the sensitivity of nanofibers to 100ppm acetone gas reaches 23.2.With the increase of acetone gas concentration,the gas sensing response sensitivity of Fe doped Nio one-dimensional nanofiber powder shows an upward trend.The improvement of gas sensing performance of NiO one-dimensional nanofibers can be attributed to the increase of defects of Nio powder caused by Fe doping,which can provide more reaction points for gas sensing reaction and enhance its gas sensitivity.

关 键 词：NIO 气敏性能 掺杂 一维纳米纤维 

分 类 号：TQ174.758[化学工程—陶瓷工业]