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Issue 21, 2015
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Template-free construction of hollow α-Fe2O3 hexagonal nanocolumn particles with an exposed special surface for advanced gas sensing properties

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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 Fe1.833(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.

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

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Supplementary files

Article information


Submitted
20 Mar 2015
Accepted
22 Apr 2015
First published
27 Apr 2015

Nanoscale, 2015,7, 9416-9420
Article type
Communication
Author version available

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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