标题：A dual-functional highly responsive gas sensor fabricated from SnO _2 porous nanosolid
作者：Yu, Q.;Wang, K.;Luan, C.;Geng, Y.;Lian, G.;Cui, D.
作者机构：[Yu, Q] State Key Lab of Crystal Materials, Shandong University, Jinan 250100, China;[ Wang, K] School of Chemistry and Chemical Engineering, Shandong 更多
通讯作者地址：[Cui, DL]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
来源：Sensors and Actuators, B. Chemical
关键词：Sensor response;SnO_2 porous nanosolid;Solvothermal hot-press;Thick film sensor
摘要：We report here the fabrication of SnO_2 thick film and SnO _2 porous nanosolid CO gas sensors by using SnO_2 nanoparticles and porous nanosolid (PNS). It is found that the thick film sensor fabricated from SnO_2 PNS has lower intrinsic resistivity than the one fabricated from SnO_2 nanoparticles, and the sensor response of the former is higher than that of the latter. On comparison, the SnO_2 PNS sensor, prepared by directly coating Au electrodes on the opposite surfaces of a SnO_2 PNS, possesses both lower intrinsic resistivity and higher sensor response to CO gas. Furthermore, the SnO_2 PNS sensor also has much lower working temperature, and it can be used as a dual functional gas sensor, i.e., as CO sensor at 300 °C and as CH_4 sensor at 400 °C, respectively.