Preparation and Property of Lanthanum Ferrite Formaldehyde Gas Sensor Modified by Carbon Nano Tubes and Silver
Our previous study revealed that the gas sensitive property of Silver-modified Lanthanum Ferrite (Ag-LaFeO3) is well, but the operating temperature is still high and the sensitivity also needs to be improved.This work based on our previous study.Ag-LaFeO3 was further modified by the Carbon Nano Tubes (CNTs).The Ag-LaFeO3 powder modified with CNTs(CNTs-Ag-LaFeO3) was prepared by a sol-gel method combined with microwave chemical synthesis.The structure and gas-sensing properties were investigated.The results show that the structure of CNTs-Ag-LaFeO3 is of orthogonal perovskite.The sensitivity of 0.75% CNTs -Ag-LaFeO3 powder for 1 ppm formaldehyde is 13 at 86℃.The response and recovery time are 100s and 60s, respectively.Moreover, the sensor also has an obvious response for 1ppm formaldehyde at 58℃.
Gas sensor LaFeO3 Carbon Nano Tubes
Yu-min Zhang Yu-tao Lin Jin Zhang Zhong-qi Zhu Qiang Liu Qing-ju Liu
Yunnan Key Laboratory of Nanomaterials & Nanotechnology,Yunnan University,Kunming 650091,China
国际会议
2012 China Functional Materials Technology and Industry Forum(2012中国功能材料科技与产业高层论坛)(CFMTIF2012)
昆明
英文
554-557
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）