ZIF-8衍生La掺杂ZnO纳米颗粒的制备及其气敏性能  

Synthesis and Sensing Properties of ZIF-8 Derived La-doped ZnO Nanoparticles

作　　者：郭梦辉 王雨萌 齐蓓影 徐俊敏 贾建峰[1] 王新昌[1] GUO Menghui;WANG Yumeng;QI Beiying;XU Junmin;JIA Jianfeng;WANG Xinchang(Key Laboratory of Material Physics of Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China)

机构地区：[1]郑州大学物理学院材料物理教育部重点实验室,河南郑州450052

出　　处：《材料科学与工程学报》2022年第1期51-56,128,共7页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51802288);河南省教育厅科学技术研究重点项目基础研究计划资助项目(14B140012)。

摘　　要：以ZIF-8及La掺杂ZIF-8为前驱体,经高温煅烧制备ZnO及La掺杂ZnO纳米颗粒。研究了La掺杂对ZnO纳米颗粒的形貌、晶体结构及气敏性能的影响。利用X射线衍射仪、扫描电子显微镜对材料的微结构进行表征,结果表明:La掺杂有利于获得更小粒径的类球形纳米结构,但La掺杂未改变ZIF-8及衍生ZnO纳米结构的晶体结构。以丙酮为目标气体研究了La掺杂对ZnO纳米颗粒气敏性能的影响,研究发现La掺杂能够显著提高ZnO纳米颗粒对丙酮的灵敏度、选择性和响应速度。La的掺杂量为3 at%时ZnO纳米颗粒对丙酮的气敏性能最佳,且在350℃工作温度下对丙酮具有良好的气敏稳定性和灵敏度-丙酮浓度线性关系。ZnO and La-doped ZnO nanoparticles were prepared by high temperature calcination using ZIF-8 and La-doped ZIF-8 as precursors.The effects of La doping on morphology,crystal structure and acetone sensing properties of ZnO nanoparticles were studied.The results show that La doping is beneficial to obtain spherical nanostructures with smaller size,but the crystal structures of ZIF-8 and ZnO nanostructures are not changed.The acetone sensing properties of the sensors based on ZnO nanoparticles with different La doping contents were investigated.It is found that La doping can significantly improve the sensitivity,selectivity and response rate of ZnO nanoparticles to acetone.When the La doping content is 3 at%,the ZnO nanoparticles exhibit the best acetone sensing properties.Moreover,the acetone sensing properties of 3 at% La-doped ZnO nanoparticles have excellent stability and the linear relation of sensitivity-acetone concentration at 350℃.

关 键 词：LA掺杂 ZNO ZIF-8 气敏性能 丙酮 

分 类 号：TB381[一般工业技术—材料科学与工程]