TY - JOUR
T1 - High-performance liquefied petroleum gas sensing based on nanostructures of zinc oxide and zinc stannate
AU - Sivapunniyam, Aarthy
AU - Wiromrat, Niti
AU - Myint, Myo Tay Zar
AU - Dutta, Joydeep
N1 - Funding Information:
The authors would like to acknowledge the partial financial support from National Nanotechnology center (NANOTEC), Thailand , Center of Excellence in Nanotechnology at the Asian Institute of Technology , Thailand, Ministry of Science and Technology , Thailand and Royal Thai Government .
PY - 2011/9/20
Y1 - 2011/9/20
N2 - Toxic and combustible gas detection plays a major role in environmental air quality monitoring. Real-time monitoring of hazardous gases and signal of accidental leakages is of great importance owing to the concern for safety requirements in industries and household applications. A simple and economical method for the fabrication of highly sensitive zinc oxide (ZnO) nanorods based gas sensors for detecting low concentrations of Liquefied Petroleum Gas (LPG) was studied in this work. Platinum (Pt) nanoparticles were deposited on the sensing medium which acts as catalysts to improve the sensor performance. The change in electrical resistance of the metal oxide semiconductor for varying concentrations of LPG was measured. Maximum response of 59% was achieved for 9000 ppm LPG at 250 °C. Further to improve the sensing performance of the sensor towards LPG, surface modification of ZnO nanorods using zinc stannate (Zn2SnO4) microcubes was performed. High response of 63% was observed for 3000 ppm LPG at 250 °C. Significant improvement in response of the sensor with Zn2SnO4 microcubes on ZnO nanorods was observed when compared to sensor with ZnO nanorods.
AB - Toxic and combustible gas detection plays a major role in environmental air quality monitoring. Real-time monitoring of hazardous gases and signal of accidental leakages is of great importance owing to the concern for safety requirements in industries and household applications. A simple and economical method for the fabrication of highly sensitive zinc oxide (ZnO) nanorods based gas sensors for detecting low concentrations of Liquefied Petroleum Gas (LPG) was studied in this work. Platinum (Pt) nanoparticles were deposited on the sensing medium which acts as catalysts to improve the sensor performance. The change in electrical resistance of the metal oxide semiconductor for varying concentrations of LPG was measured. Maximum response of 59% was achieved for 9000 ppm LPG at 250 °C. Further to improve the sensing performance of the sensor towards LPG, surface modification of ZnO nanorods using zinc stannate (Zn2SnO4) microcubes was performed. High response of 63% was observed for 3000 ppm LPG at 250 °C. Significant improvement in response of the sensor with Zn2SnO4 microcubes on ZnO nanorods was observed when compared to sensor with ZnO nanorods.
KW - Gas sensor
KW - Liquefied petroleum gas (LPG)
KW - Nanorods
KW - Zinc oxide
KW - Zinc stannate
UR - http://www.scopus.com/inward/record.url?scp=79959632778&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959632778&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2011.03.055
DO - 10.1016/j.snb.2011.03.055
M3 - Article
AN - SCOPUS:79959632778
SN - 0925-4005
VL - 157
SP - 232
EP - 239
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
IS - 1
ER -