Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection

Li, Zhijie, Lin, Zhijie, Wang, Ningning, Huang, Yanwu, Wang, Junqiang, Liu, Wei, Fu, Yong Qing and Wang, Zhiguo (2016) Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection. Materials & Design, 110. pp. 532-539. ISSN 0264-1275

[img]
Preview
Text
Material Design-accepted manuscript.pdf - Accepted Version

Download (2MB) | Preview
Official URL: http://dx.doi.org/10.1016/j.matdes.2016.08.035

Abstract

The α-Fe2O3 micro-ellipsoids were prepared using a facile hydrothermal process without any surfactant or template, and their morphological, structural and H2S sensing properties were investigated. The α-Fe2O3 showed uniform micro-ellipsoids with a long axis diameter of 1.7 μm and a short axis diameter of 1.2 μm. Detailed structural analysis confirmed that the synthesized α-Fe2O3 micro-ellipsoids were compact particles with a hexagonal structure. Gas sensor base on the α-Fe2O3 micro-ellipsoids showed excellent response, short response/recovery time (< 90 s and 30 s, respectively), low detection concentration (~ 0.5 ppm), good long-term stability and excellent selectivity towards H2S gas at the optimized operating temperature of 350 °C. The sensing mechanism of the sensor based on the α-Fe2O3 micro-ellipsoids towards H2S was discussed.

Item Type: Article
Uncontrolled Keywords: α-Fe2O3; Micro-ellipsoid; Hydrothermal; H2S; Gas sensor
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 12 Aug 2016 13:51
Last Modified: 10 Aug 2017 09:27
URI: http://nrl.northumbria.ac.uk/id/eprint/27563

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence