Antimony tungstate; Carbon dioxide; DFT analysis; Doping; Room temperature; Active Layer; Ambients; Bi-doped; Bismuth-doped; DFT analyze; Gas sensing; Gas-sensors; Sensing mechanism; Synthesised; Condensed Matter Physics; Physical and Theoretical Chemistry; Metals and Alloys; Materials Chemistry
Abstract :
[en] Bismuth-doped antimony tungstate (Bi-doped Sb2WO6) microspheres were synthesized via a novel hydrothermal synthesis approach. These microspheres were then used as active layers in gas sensors for the detection of carbon dioxide (CO2), a significant greenhouse gas and a critical parameter for evaluating air quality. The incorporation of bismuth significantly enhances the gas-sensing performance of the Sb2WO6 microspheres, with the 4% Bi-doped sensing active layer achieving a remarkable response value of 15 when exposed to 200 ppm of CO2, outperforming the undoped Sb2WO6. Furthermore, the selectivity of the 4%Bi-Sb2WO6 sensor toward CO2 gas was enhanced relative to the Sb2WO6 sensor. The fundamental mechanisms of gas sensing and the factors contributing to the improved CO2 response of 4%Bi-Sb2WO6 microspheres were investigated using density functional theory. Bi-doped Sb2WO6 materials exhibit significant advantages in gas-sensing applications, including improved conductivity, enhanced gas adsorption capacity, increased reaction rates, good chemical stability, excellent selectivity, and the ability to adjust electron density. These characteristics enable Bi-doped Sb2WO6 to demonstrate higher sensitivity and rapid response capabilities in gas sensors, making it suitable for practical applications.
Disciplines :
Chemistry
Author, co-author :
Zheng, Zi-Chen; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China ; Chimie des Interactions Plasma-Surface, Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
Liu, Ke-Wei; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China ; Service de Science des Matériaux, Research Institute for Materials Science and Engineering, Faculté Polytechnique, University of Mons, Mons, Belgium
Zhou, Yi-Wen; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China
Zhang, Zi-Cong; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China
Qin, Yong-Bin; College of Mechanical Engineering, Yangzhou University, Yangzhou, China
Luo, Yi-Fan; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China
Xu, Kai-Chun; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China ; ICB UMR 6303, CNRS, Univ. Bourgogne Franche-Comté, UTBM, Belfort, France
Guo, Liang-Chao; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China
Debliquy, Marc ; Université de Mons - UMONS > Faculté Polytechnique > Service de Science des Matériaux
Bittencourt, Carla ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Zhang, Chao ; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Jiangsu Key Laboratory of Surface Strengthening and Functional Manufacturing, Yangzhou University, Yangzhou, China
Language :
English
Title :
Sensing mechanisms of hierarchical bismuth-doped antimony tungstate microspheres for CO2 detection at ambient temperatures
Research Institute for Materials Science and Engineering
Funders :
China Scholarship Council Postgraduate Research and Practice Innovation Program of Jiangsu Province of China Yangzhou Science and Technology Plan Project Outstanding Youth Foundation of Jiangsu Province of China
Funding text :
This work was financially supported by the Outstanding Youth Foundation of Jiangsu Province of China (No. BK20211548), Yangzhou Science and Technology Plan Project (No. YZ2023246), China Scholarship Council (No. 202308320445) and the Postgraduate Research and Practice Innovation Program of Jiangsu Province of China (No. KYCX23_3551).
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