P1GS.15 - Sensitive and Selective H2S Gas Detection at Low Temperature Employing In2O3 Quantum Dots
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-1 - Gas Sensors
- Author(s)
- H. Liu, S. Yang, Z. Song, N. Gao, Z. Hu, Q. Liu, J. Liu, B. Zhang - School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei (China)
- Pages
- 547 - 548
- DOI
- 10.5162/IMCS2018/P1GS.15
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
Indium oxide (In2O3) has been employed for gas sensors as an important candidate. Here we demonstrated the sensitive gas sensors based on In2O3 quantum dots synthesized via solvetheramal methodology. A room-temperature films deposition was utilized for sensor fabrication, followed by the Cu salt surface ligand exchange with a moderate annealing treatment. The In2O3 CQD-based gas sensors exhibited an excellent H2S-sensing performance with the response up to 90 upon 5 ppm H2S with a fast response and recovery time being 72 s and 200 s at the low operating temperature of 37 °C. Their sensitive response and recovery properties combined with the low-temperature fabrication and operation, rendering the devices amenable to rapid H2S detection with lower power consumption in practical application.