摘要
为了获得高性能的气体传感器,采用简单的沉淀法制备了ZIF-L/ZIF-67前驱体材料,通过退火得到星形衍生物ZnO/Co_(3)O_(4),分析了煅烧温度对气敏性能的影响,利用X射线衍射仪和扫描电子显微镜表征样品成分和形貌。结果表明,煅烧温度为500℃时制备的ZnO/Co_(3)O_(4)复合材料表现出良好的性能。其在最佳工作温度180℃下对20×10^(-6)三乙胺的响应值为40,响应恢复时间分别为28和47 s。该复合材料的最低检测限达5×10^(-6),对三乙胺气体有优异的选择性。其良好的气敏性能主要归因于MOF衍生物的多孔结构和ZnO与Co_(3)O_(4)之间形成的异质结构。
This paper intends to obtain a high performance gas sensor.The study consists of preparing ZIF-L/ZIF-67 precursor materials with a simple precipitation method;obtaining the star shaped derivative ZnO/Co_3O_(4) by annealing;analyzing the effect of calcination temperature on gas sensing properties;and characterizing the composition and morphology of the samples by using X-ray diffractometer and scanning electron microscope.The results show that ZnO/Co_3O_(4) composite prepared at a calcination temperature of 500 ℃ exhibits good properties.40 is the response value to 20×10~(-6) triethylamine at the optimal operating temperature of 180 ℃,and response recovery time is 28 and 47 s,respectively.This composite has a minimum detection limit of 5×10~(-6) and excellent selectivity to triethylamine gas.The good gas sensing property is mainly attributed to the porous structures of MOF derivatives and the heterostructure formed between ZnO and Co_3O_4.
作者
李学伟
罗晨
高新明
Li Xuewei;Luo Chen;Gao Xinming(School of Materials Science&Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)
出处
《黑龙江科技大学学报》
CAS
2023年第4期521-527,共7页
Journal of Heilongjiang University of Science And Technology
基金
国家重点研发计划项目(2018YFC0810500)
黑龙江科技大学引进高层次人才科研启动基金项目(000009020360/702)。
