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Title: Perovskite-sensitized β-Ga2O3 nanorod arrays for highly selective and sensitive NO2 detection at high temperature

Abstract

Amongst various gaseous pollutants, NO2 is one of the major exhausts originating from fossil fuel and gas combustions in vehicle engines and power plants at high temperature. Under such a scenario, in situ and real-time gas detection and monitoring solutions are largely limited, which hinders the energy-efficient and resource-saving operations of these advanced energy systems. Herein, a new type of perovskite-sensitized β-Ga2O3 nanorod-array has been successfully fabricated to detect NOx at high temperature selectively and sensitively. The demonstrated gas sensors are highly sensitive to NO2 at 800 °C, with excellent reversible and reproducible response characteristics. Through the surface decoration of perovskite-type La0.8Sr0.2CoO3 (LSCO) nanoparticles, the sensitivity of β-Ga2O3 nanorod array gas sensors is enhanced by nearly an order of magnitude, along with much faster response dynamics. A remarkable selectivity toward oxidative gases was also demonstrated with the robust differentiation of NO2.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1637486
Alternate Identifier(s):
OSTI ID: 1630167
Report Number(s):
BNL-216115-2020-JAAM
Journal ID: ISSN 2050-7488
Grant/Contract Number:  
SC0012704; FE0026219; FE0000870; FE0011577; EE0008423
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 8; Journal Issue: 21; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, Bo, Lin, Hui-Jan, Gao, Haiyong, Lu, Xingxu, Nam, Chang-Yong, and Gao, Pu-Xian. Perovskite-sensitized β-Ga2O3 nanorod arrays for highly selective and sensitive NO2 detection at high temperature. United States: N. p., 2020. Web. doi:10.1039/d0ta02691c.
Zhang, Bo, Lin, Hui-Jan, Gao, Haiyong, Lu, Xingxu, Nam, Chang-Yong, & Gao, Pu-Xian. Perovskite-sensitized β-Ga2O3 nanorod arrays for highly selective and sensitive NO2 detection at high temperature. United States. https://doi.org/10.1039/d0ta02691c
Zhang, Bo, Lin, Hui-Jan, Gao, Haiyong, Lu, Xingxu, Nam, Chang-Yong, and Gao, Pu-Xian. Wed . "Perovskite-sensitized β-Ga2O3 nanorod arrays for highly selective and sensitive NO2 detection at high temperature". United States. https://doi.org/10.1039/d0ta02691c. https://www.osti.gov/servlets/purl/1637486.
@article{osti_1637486,
title = {Perovskite-sensitized β-Ga2O3 nanorod arrays for highly selective and sensitive NO2 detection at high temperature},
author = {Zhang, Bo and Lin, Hui-Jan and Gao, Haiyong and Lu, Xingxu and Nam, Chang-Yong and Gao, Pu-Xian},
abstractNote = {Amongst various gaseous pollutants, NO2 is one of the major exhausts originating from fossil fuel and gas combustions in vehicle engines and power plants at high temperature. Under such a scenario, in situ and real-time gas detection and monitoring solutions are largely limited, which hinders the energy-efficient and resource-saving operations of these advanced energy systems. Herein, a new type of perovskite-sensitized β-Ga2O3 nanorod-array has been successfully fabricated to detect NOx at high temperature selectively and sensitively. The demonstrated gas sensors are highly sensitive to NO2 at 800 °C, with excellent reversible and reproducible response characteristics. Through the surface decoration of perovskite-type La0.8Sr0.2CoO3 (LSCO) nanoparticles, the sensitivity of β-Ga2O3 nanorod array gas sensors is enhanced by nearly an order of magnitude, along with much faster response dynamics. A remarkable selectivity toward oxidative gases was also demonstrated with the robust differentiation of NO2.},
doi = {10.1039/d0ta02691c},
journal = {Journal of Materials Chemistry. A},
number = 21,
volume = 8,
place = {United States},
year = {Wed May 06 00:00:00 EDT 2020},
month = {Wed May 06 00:00:00 EDT 2020}
}

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