A formaldehyde gas sensor based on zinc doped lanthanum ferrite
The gas-sensing properties of zinc doped lanthanum ferrite (Zn-LaFeO3) compounds for formaldehyde were investigated in this paper.Zn-LaFeO3 powders were prepared using sol-gel method combined with microwave chemical synthesis.The powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively.The formaldehyde gas-sensing characteristics for the sample were examined.The experimental results indicate that the sensor based on the sample Zn-LaFeO3 shows excellent gas-sensing properties to formaldehyde gas.At the optimal operating temperature of 250℃, the sensitivity of the sensor based on LaFe0.7Zn0.3O3 to 100ppm formaldehyde is 38, while to other test gases, the sensitivity is all lower than 20.The response and recovery times for the sample to formaldehyde gas are 100s and 100s, respectively.
Zn-LaFeO3 Gas sensor Formaldehyde High sensitivity
Jin Zhang Yu-min Zhang Chang-yi Hu Zhong-qi Zhu Qing-ju Liu
Yunnan Key Laboratory of Nanomaterials & Technology, Yunnan University, 650091 Kunming, China The State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
304-310
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）