摘要
开发一种性能优异的氨气气体传感器对人类健康和环境保护具有重要意义.利用溶胶凝胶法制备了MgFe_(2)O_(4)纳米材料,并通过乙醇超声分散法与Ti_(3)C_(2)T_(x)复合,制备了不同比例的Ti_(3)C_(2)T_(x)–MgFe_(2)O_(4)复合材料.随后,采用X射线衍射、扫描电子显微镜、X射线光电子能谱分析、Fourier红外光谱等方法对Ti_(3)C_(2)T_(x)–MgFe_(2)O_(4)复合材料的结构和形貌进行了表征,研究了不同比例Ti_(3)C_(2)T_(x)–MgFe_(2)O_(4)复合材料的气敏性能.结果表明:2.5%(质量分数)Ti_(3)C_(2)T_(x)–MgFe_(2)O_(4)复合材料在室温(25℃)对100μL/L氨气的响应(Ra/Rg=4.7)比单一MgFe_(2)O_(4)纳米材料(Ra/Rg=1.3)高出3.6倍,并且具有良好的气敏选择性和快速的响应/恢复时间(10.8 s/6.6 s).
The development of a high-property ammonia gas sensor is of great significance for human health and environmental protection.Herein,MgFe_(2)O_(4)nanomaterial was synthesized by a sol-gel method,and then a series of Ti_(3)C_(2)T_(x)-MgFe_(2)O_(4)composites were prepared by an ethanol ultrasonic dispersion method.The structure and morphology of Ti_(3)C_(2)T_(x)-MgFe_(2)O_(4)composites were characterized by X-ray diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy,and Fourier transform infrared spectroscopy.The gas sensing performance of the sensors based on different ratios of Ti_(3)C_(2)T_(x)-MgFe_(2)O_(4)composites was investigated.The result shows that the gas response of 2.5%(in mass)Ti_(3)C_(2)T_(x)-MgFe_(2)O_(4)composite(Ra/Rg=4.7)to 100μL/L ammonia at 25 C is 3.6 times greater than that of pristine MgFe_(2)0_(4)nanomaterial(Ra/Rg=1.3).Meanwhile,this composite exhibits superior selectivity and fast response/recovery durations(i.e.,10.8 s/6.6 s).
作者
储向峰
白玉莹
章寅
梁士明
CHU Xiangfeng;BAI Yuying;ZHANG Yin;LIANG Shiming(School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243002,Anhui,China;School of Materials Science and Engineering,Linyi University,Linyi 276005,Shandong,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2023年第4期1034-1041,共8页
Journal of The Chinese Ceramic Society
基金
国家自然基金项目(61971003)
山东省自然科学基金项目(ZR2020MF025)。
关键词
复合材料
碳化钛
氨气
气敏性能
composite material
titanium carbide
ammonia
gas sensing properties
作者简介
第一作者:储向峰(1966-),男,博士,教授;通信作者:储向峰(1966-),男,博士,教授;通信作者:梁士明(1983-),男,博士,副教授。
