P1GS.15 - Sensitive and Selective H2S Gas Detection at Low Temperature Employing In2O3 Quantum Dots
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Gas Sensors
- 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)
- 547 - 548
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.