Please use this identifier to cite or link to this item:
Title: Low-Temperature H2S Detection with Hierarchical Cr-Doped WO3 Microspheres
Authors: Wang, Yanrong
Liu, Bin
Xiao, Songhua
Wang, Xinghui
Sun, Leimeng
Li, Han
Xie, Wuyuan
Li, Qiuhong
Zhang, Qing
Wang, Taihong
Keywords: WO3
Cr Dopant
Issue Date: 2016
Source: Wang, Y., Liu, B., Xiao, S., Wang, X., Sun, L., Li, H., et al. (2016). Low-Temperature H2S Detection with Hierarchical Cr-Doped WO3 Microspheres . ACS Applied Materials & Interfaces, 8(15), 9674-9683.
Series/Report no.: ACS Applied Materials & Interfaces
Abstract: Hierarchical Cr-doped WO3 microspheres have been successfully synthesized for efficient sensing of H2S gas at low temperatures. The hierarchical structures provide an effective gas diffusion path via well-aligned micro-, meso-, and macroporous architectures, resulting in significant enhancement in sensing response to H2S. The temperature and gas concentration dependence on the sensing properties elucidate that Cr dopants remarkably improve the response and lower the sensor’ operating temperature down to 80 °C. Under 0.1 vol % H2S, the response of Cr-doped WO3 sensor is 6 times larger than pristine WO3 sensor at 80 °C. We suggest the increasing number of oxygen vacancies created by Cr dopants to be the underlying reason for enhancement of charge carrier density and accelerated reactions with H2S.
ISSN: 1944-8244
DOI: 10.1021/acsami.5b12857
Rights: © 2016 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.