TY - JOUR
T1 - Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis
AU - Cho, Yoon Ho
AU - Liang, Xishuang
AU - Kang, Yun Chan
AU - Lee, Jong Heun
N1 - Funding Information:
This work was supported by Project (No. 14003800 ) of the Technology Development Program of S/W convergence Component by Ministry of Knowledge Economy (MKE) and Korea Evaluation Institute of Industrial Technology (KEIT) and by a National Research Foundation of Korea (NRF) grant (No. 2013R1A2A1A01006545 ) funded by the Korea government ( MEST ).
PY - 2015/2
Y1 - 2015/2
N2 - An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO2 hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO2 hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO2 hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH3, CO, H2, and NO2, and a decreased cross-response to C2H5OH, whereas pure SnO2 hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO2 and the high catalytic activity of Rh to TMA.
AB - An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO2 hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO2 hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO2 hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH3, CO, H2, and NO2, and a decreased cross-response to C2H5OH, whereas pure SnO2 hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO2 and the high catalytic activity of Rh to TMA.
KW - Gas sensor
KW - Rh-doped SnO hollow sphere
KW - Trimethylamine
KW - Ultra-low detection limit
KW - Ultrasonic spray pyrolysis
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U2 - 10.1016/j.snb.2014.10.001
DO - 10.1016/j.snb.2014.10.001
M3 - Article
AN - SCOPUS:84910100126
SN - 0925-4005
VL - 207
SP - 330
EP - 337
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - Part A
ER -