Room temperature WO3-Bi2WO6 sensors based on hierarchical microflowers for ppb-level H2S detection

Gas sensor; H2S; Heterojunction; Hierarchical microflowers; WO3-Bi2WO6; Catalytic effects; Gas-sensors; Hierarchical microflower; Hydrothermal techniques; Large specific surface areas; Microflowers; N-n heterojunctions; Ppb levels; Sensing property; WO3-bi2WO6; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Industrial and Manufacturing Engineering; General Chemical Engineering; General Chemistry

Abstract :

[en] Pristine Bi2WO6 nanosheets and hierarchical WO3-Bi2WO6 microflowers were prepared via a facile hydrothermal technique. WO3-Bi2WO6 microflowers were assembled with thin nanosheets, where WO3 nanoparticles were uniformly loaded. The H2S sensing properties of pristine Bi2WO6 nanosheets and hierarchical WO3-Bi2WO6 microflowers were systematically investigated at room temperature. 20 WO3-Bi2WO6 microflowers sensor displayed the best sensing property towards ppb-level H2S compared with all other samples. The enhancement was ascribed to the catalytic effect of WO3 nanoparticles and the modified microstructure with large specific surface areas. Moreover, the n–n heterojunction structures also increase the thickness of electron depletion layer and potential barrier height, which could efficiently improve the sensing properties. The practical application of 20 WO3-Bi2WO6 microflowers sensor in detecting the volatiles of Pangasius was also studied in this work. Therefore, the hierarchical WO3-Bi2WO6 microflower is a promising ppb-level H2S sensing material for environment monitoring and fish freshness detection.

Research center :

CRIM - Ingénierie des matériaux

Disciplines :

Materials science & engineering

Author, co-author :

Zhang, Chao; College of Mechanical Engineering, Yangzhou University, Yangzhou, China

Wu, Kaidi; College of Mechanical Engineering, Yangzhou University, Yangzhou, China ; Service de Science des Matériaux, Faculté Polytechnique, Université de Mons, Mons, Belgium

Liao, Hanlin; ICB, UMR 6303, CNRS, Univ. Bourgogne Franche-Comté, UTBM, Belfort, France

Debliquy, Marc ; Université de Mons - UMONS

Language :

English

Title :

Room temperature WO3-Bi2WO6 sensors based on hierarchical microflowers for ppb-level H2S detection

Publication date :

15 February 2022

Journal title :

Chemical Engineering Journal

ISSN :

1385-8947

eISSN :

1873-3212

Publisher :

Elsevier B.V.

Volume :

430

Pages :

132813

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S1385894721043904?httpAccept=text/xml

Research unit :

F502 - Science des Matériaux

Research institute :

Research Institute for Materials Science and Engineering

Funders :

National Key Research and Development Program of China
National Natural Science Foundation of China
Outstanding Youth Foundation of Jiangsu Province of China

Funding text :

This work is supported by the Natural Science Foundation of China under Grant No. 51872254, the National Key Research and Development Program of China under Grant No. 2017YFE0115900, and the Outstanding Youth Foundation of Jiangsu Province of China under Grant No. BK20211548.

Available on ORBi UMONS :

since 22 August 2022

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