UV-enhanced CO sensing using Ga 2O3-based nanorod arrays at elevated temperature
Abstract
Monitoring and control of gaseous combustion process are critically important in advanced energy systems such as power plants, gas turbines, and automotive engines. However, very limited gas sensing solutions are available in the market for such application due to the inherent high temperature of combustion gaseous atmosphere. In this study, we fabricated and demonstrated high-performance metal oxide based nanorod array sensors assisted with ultra-violet (UV) illumination for in situ and real-time high-temperature gas detection. Without UV-illumination, it was found surface decoration of either 5 nm LSFO or 1 nm Pt nanoparticles can enhance the sensitivity over CO at 500 °C by an order of magnitude. Under the 254 nm UV illumination, CO gas-sensing performance of Ga2O3-based nanorod array sensors was further enhanced with the sensitivity boosted by 125 %, and the response time reduced by 30 % for La0.8Sr0.2FeO3(LSFO)-decorated sample. The UV-enhanced detecting of CO might be due to the increased population of photo-induced electron-hole pairs. While for LSFO-decorated nanorod array sensor under UV illumination, the enhancement is through a combination of sensitizing effect and photocurrent effect.
- Authors:
-
- Univ. of Connecticut, Storrs, CT (United States). Dept. of Materials Science and Engineering. Inst. of Materials Science
- Publication Date:
- Research Org.:
- Univ. of Connecticut, Storrs, CT (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1430257
- Alternate Identifier(s):
- OSTI ID: 1361742
- Grant/Contract Number:
- EE0006854; FE0000870; FE0011577
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 110; Journal Issue: 4; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Lin, Hui-Jan, Gao, Haiyong, and Gao, Pu-Xian. UV-enhanced CO sensing using Ga 2O3-based nanorod arrays at elevated temperature. United States: N. p., 2017.
Web. doi:10.1063/1.4974213.
Lin, Hui-Jan, Gao, Haiyong, & Gao, Pu-Xian. UV-enhanced CO sensing using Ga 2O3-based nanorod arrays at elevated temperature. United States. https://doi.org/10.1063/1.4974213
Lin, Hui-Jan, Gao, Haiyong, and Gao, Pu-Xian. Mon .
"UV-enhanced CO sensing using Ga 2O3-based nanorod arrays at elevated temperature". United States. https://doi.org/10.1063/1.4974213. https://www.osti.gov/servlets/purl/1430257.
@article{osti_1430257,
title = {UV-enhanced CO sensing using Ga 2O3-based nanorod arrays at elevated temperature},
author = {Lin, Hui-Jan and Gao, Haiyong and Gao, Pu-Xian},
abstractNote = {Monitoring and control of gaseous combustion process are critically important in advanced energy systems such as power plants, gas turbines, and automotive engines. However, very limited gas sensing solutions are available in the market for such application due to the inherent high temperature of combustion gaseous atmosphere. In this study, we fabricated and demonstrated high-performance metal oxide based nanorod array sensors assisted with ultra-violet (UV) illumination for in situ and real-time high-temperature gas detection. Without UV-illumination, it was found surface decoration of either 5 nm LSFO or 1 nm Pt nanoparticles can enhance the sensitivity over CO at 500 °C by an order of magnitude. Under the 254 nm UV illumination, CO gas-sensing performance of Ga2O3-based nanorod array sensors was further enhanced with the sensitivity boosted by 125 %, and the response time reduced by 30 % for La0.8Sr0.2FeO3(LSFO)-decorated sample. The UV-enhanced detecting of CO might be due to the increased population of photo-induced electron-hole pairs. While for LSFO-decorated nanorod array sensor under UV illumination, the enhancement is through a combination of sensitizing effect and photocurrent effect.},
doi = {10.1063/1.4974213},
journal = {Applied Physics Letters},
number = 4,
volume = 110,
place = {United States},
year = {Mon Jan 23 00:00:00 EST 2017},
month = {Mon Jan 23 00:00:00 EST 2017}
}
Web of Science
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