Facile synthesis of α-Fe{sub 2}O{sub 3} nanoparticles for high-performance CO gas sensor

Highlights: • We have demonstrated a facile method to prepare Fe{sub 2}O{sub 3} nanoparticles. • The gas sensing properties of α-Fe{sub 2}O{sub 3} have been invested. • The results show potential application of α-Fe{sub 2}O{sub 3} NPs for CO sensors in environmental monitoring. - Abstract: Iron oxid...

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Bibliographic Details
Published in:Materials research bulletin 2015-08, Vol.68
Main Authors: Cuong, Nguyen Duc, Faculty of Hospitality and Tourism, Hue University, 22 Lam Hoang, Vy Da Ward, Hue City, Khieu, Dinh Quang, Hoa, Tran Thai, Quang, Duong Tuan, Viet, Pham Hung, Lam, Tran Dai, Hoa, Nguyen Duc, Hieu, Nguyen Van
Format: Article
Language:English
Subjects:
ABUNDANCE
ADSORPTION
CARBON MONOXIDE
ELECTRON DIFFRACTION
GASES
HYDROTHERMAL SYNTHESIS
IRON OXIDES
IRON-ALPHA
ISOTHERMS
NANOPARTICLES
NANOSCIENCE AND NANOTECHNOLOGY
NITROGEN
RESOLUTION
SCANNING ELECTRON MICROSCOPY
SENSORS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
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Summary:Highlights: • We have demonstrated a facile method to prepare Fe{sub 2}O{sub 3} nanoparticles. • The gas sensing properties of α-Fe{sub 2}O{sub 3} have been invested. • The results show potential application of α-Fe{sub 2}O{sub 3} NPs for CO sensors in environmental monitoring. - Abstract: Iron oxide nanoparticles (NPs) were prepared via a simple hydrothermal method for high performance CO gas sensor. The synthesized α-Fe{sub 2}O{sub 3} NPs were characterized by X-ray diffraction, nitrogen adsorption/desorption isotherm, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). The SEM, TEM results revealed that obtained α-Fe{sub 2}O{sub 3} particles had a peanut-like geometry with hemispherical ends. The response of the α-Fe{sub 2}O{sub 3} NPs based sensor to carbon monoxide (CO) and various concentrations of other gases were measured at different temperatures. It found that the sensor based on the peanut-like α-Fe{sub 2}O{sub 3} NPs exhibited high response, fast response–recovery, and good selectivity to CO at 300 °C. The experimental results clearly demonstrated the potential application of α-Fe{sub 2}O{sub 3} NPs as a good sensing material in the fabrication of CO sensor.
ISSN:0025-5408
1873-4227
DOI:10.1016/J.MATERRESBULL.2015.03.069