Template-free construction of hollow α-Fe2O3 hexagonal nanocolumn particles with an exposed special surface for advanced gas sensing properties

Linqiang Sun; Xiao Han; Kai Liu; Shan Yin; Qiaoli Chen; Qin Kuang; Xiguang Han; Zhaoxiong Xie; Chao Wang

doi:10.1039/C5NR01790D

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Template-free construction of hollow α-Fe₂O₃ hexagonal nanocolumn particles with an exposed special surface for advanced gas sensing properties†

Linqiang Sun,^a Xiao Han,^a Kai Liu,^a Shan Yin,^a Qiaoli Chen,^b Qin Kuang,^b Xiguang Han,*^a Zhaoxiong Xie^b and Chao Wang^a

Author affiliations

* Corresponding authors

^a Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, P. R. China
E-mail: xghan@jsnu.edu.cn

^b State Key Laboratory of Physical Chemistry of Solid Surfaces & Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Abstract

Hollow α-Fe₂O₃ hexagonal nanocolumn particles (HHCPs) with exposed (10 [1 with combining macron] 0) and (11 [2 with combining macron] 5) facets have been synthesized through a hydrothermal method in the absence of templates. The time-dependent experimental results demonstrate that the formation of HHCPs includes four main steps: (1) formation of nanowire precursors, (2) aggregation and conversion to Fe_1.833(OH)_0.5O₂ solid ellipsoid particles (SEPs), (3) dehydration to form hollow ellipsoid particles (HEPs), and (4) recrystallization to HHCPs. Due to their advantages of the hollow structure and the exposed special external and internal surface on the pore structure, the HHCPs exhibit higher gas sensing ability than that of calcined SEPs (CSEPs) and HEPs.

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Article information

DOI: https://doi.org/10.1039/C5NR01790D
Article type: Communication
Submitted: 20 Mar 2015
Accepted: 22 Apr 2015
First published: 27 Apr 2015

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Nanoscale, 2015,7, 9416-9420

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Template-free construction of hollow α-Fe₂O₃ hexagonal nanocolumn particles with an exposed special surface for advanced gas sensing properties

L. Sun, X. Han, K. Liu, S. Yin, Q. Chen, Q. Kuang, X. Han, Z. Xie and C. Wang, Nanoscale, 2015, 7, 9416 DOI: 10.1039/C5NR01790D

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