兰州大学机构库
Au-decorated WO3-based sensor for chemiresistive detection of NO2 at 80 °C
Wang, Qiao; Li, Ruixia; Wang, Peizhe; Zhang, Yaxiong; Wang, Yanrong; Yang, Yifan; Wu, Zhengkun; An, Beixi; Li, Jianjun; Xie, Erqing
2023-09-01
Source PublicationSENSORS AND ACTUATORS B-CHEMICAL   Impact Factor & Quartile
ISSN0925-4005
Volume390
AbstractNitrogen dioxide (NO2), a hazardous gas of acidic nature, is constantly released into the atmosphere by human activities. Based on the noble metal sensitization, the NO2 sensing performance of Au decorated WO3 sensors (Rg/Ra = 4.3@ 1 ppb, 746.0@ 5 ppm) was found to be superior to that of pristine WO3 (Rg/Ra = 1.2@ 1 ppb). In addition, the dynamic processes that occur in Au–WO3-3 during NO2 sensing reactions were analyzed using ex-situ X-ray photoelectron spectroscopy. Density functional theory containing adsorption energy, is further used to analyse mechanism accurate electron transfer sensing process. Furthermore, the effects of the oxygen partial pressure and relative humidity on the sensing performance of the sensors were studied. The enhanced sensing mechanisms of Au–WO3 sensors can be attributed to the electronic and chemical sensitization effects of Au, increased number of active sites, decrease in the activation energy of the sensing reactions and three-dimensional hierarchical structure, which boosts the adsorption of gas molecules and charge transfer efficiency. © 2023 Elsevier B.V.
KeywordActivation energy Charge transfer Chemical detection Density functional theory Nitrogen oxides Precious metals Temperature X ray photoelectron spectroscopy Acidic nature Au–WO3 DFT calculation Ex situ Ex-situ XPS Hazardous gas Human activities Lows-temperatures Sensing performance Situ XPS
PublisherElsevier B.V.
DOI10.1016/j.snb.2023.133985
Indexed ByEI
Language英语
EI Accession Number20232114140934
EI KeywordsTungsten compounds
EI Classification Number547.1 Precious Metals ; 641.1 Thermodynamics ; 801 Chemistry ; 802.2 Chemical Reactions ; 804.2 Inorganic Compounds ; 922.1 Probability Theory ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics
Original Document TypeJournal article (JA)
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/529413
Collection兰州大学
Corresponding AuthorWang, Yanrong
AffiliationSchool of Physical Science and Technology, Lanzhou University, Lanzhou; 730000, China
First Author AffilicationLanzhou University
Corresponding Author AffilicationLanzhou University
Recommended Citation
GB/T 7714
Wang, Qiao,Li, Ruixia,Wang, Peizhe,et al. Au-decorated WO3-based sensor for chemiresistive detection of NO2 at 80 °C[J]. SENSORS AND ACTUATORS B-CHEMICAL,2023,390.
APA Wang, Qiao.,Li, Ruixia.,Wang, Peizhe.,Zhang, Yaxiong.,Wang, Yanrong.,...&Xie, Erqing.(2023).Au-decorated WO3-based sensor for chemiresistive detection of NO2 at 80 °C.SENSORS AND ACTUATORS B-CHEMICAL,390.
MLA Wang, Qiao,et al."Au-decorated WO3-based sensor for chemiresistive detection of NO2 at 80 °C".SENSORS AND ACTUATORS B-CHEMICAL 390(2023).
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