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Citation: LI Qiang, CHENG Xiao-Li, GAO Shan, HUO Li-Hua, ZHAO Jing-Gui, WANG Hai-Shui, XI Shi-Quan. Preparation and Gas-sensing Property of Ellipsoidal Shaped α-Fe₂O₃ Nano-films[J]. Chinese Journal of Applied Chemistry, ;2003, 20(8): 794-796. shu

Preparation and Gas-sensing Property of Ellipsoidal Shaped α-Fe₂O₃ Nano-films

1.
a College of Chemistry and Chemical Technology, Heilongjiang University, Harbin 150080;
2.
b Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

Corresponding author: HUO Li-Hua,
Received Date: 19 December 2002
Available Online: 21 March 2003
Fund Project: 国家自然科学基金(20101003) (20101003)黑龙江省青年攻关基金(QC02C41) (QC02C41)

The α-Fe₂O₃ sol was prepared by a sol gel method from FeCl₃·6H₂O. Thin nano particulate films of the α-Fe₂O₃ were deposited on glass substrate by dip coating sol gel technique. The structure and morphology of the thin films were characterized by XRD, UV-Vis and AFM analysis methods. The XRD results revealed that the nano crystal with (104) preferential orientation has been formed on glass substrate. The UV-Vis spectra showed that the nano particulate films obtained from Fe₂O₃ aqueous colloidal sols are well transferred to glass substrate at dip coating rate of 80 mm/min. The α-Fe₂O₃ particles are ellipsoidal shaped, with particle size of about 5~7 nm. The multilayer films exhibited high sensitivity to ethanol vapor at room temperature.
- α-Fe₂O₃,
- nano films,
- gas sensing property
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Preparation and Gas-sensing Property of Ellipsoidal Shaped α-Fe₂O₃ Nano-films