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Assembly, formation mechanism, and enhanced gas-sensing properties of porous and hierarchical SnO2 hollow nanostructures

Published online by Cambridge University Press:  31 January 2011

Jinyun Liu ,
Fanli Meng ,
Yu Zhong ,
Jinhuai Liu ,
Guangyu Chen ,
Yuteng Wan ,
Kai Qian  and
Sitaramanjaneya Mouli T.
Jinhuai Liu*
Affiliation:
Key Laboratory of Biomimetic Sensing and Advanced Robot Technology, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
Kai Qian
Affiliation:
Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
Sitaramanjaneya Mouli T.
Affiliation:
Centre of Nanotechnology, Indian Institute of Technology-Roorkee, Roorkee 247667, India
*
a)Address all correspondence to this author. e-mail: jhliu@iim.ac.cn
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Abstract

Hierarchical and hollow SnS2 nanostructures as precursors were fabricated via a surfactant-assisted assembly process using sodium dodecyl sulfate as soft templates. The as-prepared SnS2 nanostructures were further oxidized to form porous SnO2 conversion for investigating their gas-sensing properties in drug-precursor detection. On the basis of a series of time- and ratio-dependent reactions, a formation mechanism of the special nanostructures and factors influencing morphology and structure were determined. Gas-sensing measurements revealed that the porous and hierarchical SnO2 hollow nanostructures were sensitive to drug precursors, indicating promising applications in environmental monitoring and public safety investigation. In addition, we found that the assembled SnO2 nanomaterials possessed significantly enhanced gas-sensing properties compared with unassembled SnO2 with a solid interior.

Keywords

SemiconductingSensorNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 10 , October 2010 , pp. 1992 - 2000
Copyright
Copyright © Materials Research Society 2010

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