TY - JOUR
T1 - An Integrated Micro-chip with Ru/Al 2 O 3 /ZnO as Sensing Material for SO 2 Detection
AU - Liu, Yingying
AU - Xu, Xinyue
AU - Chen, Ying
AU - Zhang, Yuan
AU - Gao, Xinghua
AU - Xu, Pengcheng
AU - Li, Xinxin
AU - Fang, Jianhui
AU - Wen, Weijia
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research is supported by MOST of China (2016YFA0200800), Natural Science Foundation of China (61527818, 61604163, 91323304, 61571430, 61321492) and Natural Science Foundation of Shanghai (17ZR1410000). P.C. X appreciates the financial support of the Youth Innovation Promotion Association CAS (2016213). Weijia Wen is the director of Joint KAUST-HKUST Micro/Nano-Fluidics Laboratory.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2018/1/31
Y1 - 2018/1/31
N2 - SO2 sensor is highly demanded in the application fields such as environmental protection and food manufactory. Herein, an integrated microsensor is developed for SO2 gas detection. For the fabrication of microsensor, ZnO nanosheets sensing material is firstly loaded onto the sensing area of the microsensor by using inkjet printing technology. Then, Al2O3 loaded with Ru nanoparticles (Ru/Al2O3) as catalyst are locally deposited onto the surface of ZnO nanosheets layer. Gas sensing performance measurements indicate that the fabricated microsensor exhibits a selective response to SO2, and a good linear relationship in the range of 5 to 115 ppm SO2 gases. Besides, this integrated microsensor has short response and recovery time. On-line mass spectrometry (on-line MS) experiment further reveals the formation of sulfur monoxide (SOradical dot) radical as an intermediate product for SO2 sensing. During the sensing process, Ru/Al2O3 as catalyst layer brings SO2 molecules to be broken down into easily detectable species (i.e. SOradical dot), and then ZnO nanosheets with abundant gas transport channels capture the produced SO generating output signals. Therefore, this kind of sensing material configuration exploits the advantage of each element, and makes it possible for trace and selective detection of SO2 gas.
AB - SO2 sensor is highly demanded in the application fields such as environmental protection and food manufactory. Herein, an integrated microsensor is developed for SO2 gas detection. For the fabrication of microsensor, ZnO nanosheets sensing material is firstly loaded onto the sensing area of the microsensor by using inkjet printing technology. Then, Al2O3 loaded with Ru nanoparticles (Ru/Al2O3) as catalyst are locally deposited onto the surface of ZnO nanosheets layer. Gas sensing performance measurements indicate that the fabricated microsensor exhibits a selective response to SO2, and a good linear relationship in the range of 5 to 115 ppm SO2 gases. Besides, this integrated microsensor has short response and recovery time. On-line mass spectrometry (on-line MS) experiment further reveals the formation of sulfur monoxide (SOradical dot) radical as an intermediate product for SO2 sensing. During the sensing process, Ru/Al2O3 as catalyst layer brings SO2 molecules to be broken down into easily detectable species (i.e. SOradical dot), and then ZnO nanosheets with abundant gas transport channels capture the produced SO generating output signals. Therefore, this kind of sensing material configuration exploits the advantage of each element, and makes it possible for trace and selective detection of SO2 gas.
UR - http://hdl.handle.net/10754/629734
UR - https://linkinghub.elsevier.com/retrieve/pii/S0925400518301722
UR - http://www.scopus.com/inward/record.url?scp=85042928477&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2018.01.156
DO - 10.1016/j.snb.2018.01.156
M3 - Article
SN - 0925-4005
VL - 262
SP - 26
EP - 34
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -