Novel sea urchin-like hollow core-shell SnO2 superstructures: Facile synthesis and excellent ethanol sensing performance

Shunqiang Liu; Mingjiang Xie; Yanxing Li; Xuefeng Guo; Weijie Ji; Weiping Ding; Chak Tong AU

doi:10.1016/j.snb.2010.09.015

Novel sea urchin-like hollow core-shell SnO₂ superstructures: Facile synthesis and excellent ethanol sensing performance

Shunqiang Liu, Mingjiang Xie, Yanxing Li, Xuefeng Guo^*, Weijie Ji, Weiping Ding, Chak Tong AU

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

61 Citations (Scopus)

Abstract

Novel hierarchical sea urchin-like hollow core-shell SnO₂ superstructures have been fabricated by a template-free hydrothermal method, based on an inside-out Ostwald ripening mechanism. For comparison, hollow SnO₂ spheres were also prepared. It is found that the sea urchin-like hollow core-shell SnO₂ superstructures exhibit nearly three times better response to ethanol than the hollow SnO₂ spheres. The superior sensing performance is plausibly originated from the unique hierarchical core-shell structure with the nano-sized spikes (5-15 nm in diameter) on the shells.

Original language	English
Pages (from-to)	229-235
Number of pages	7
Journal	Sensors and Actuators B: Chemical
Volume	151
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2010.09.015
Publication status	Published - 26 Nov 2010

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

User-Defined Keywords

Gas sensor
Ostwald ripening
Superstructure
Tin dioxide
Urchin

Access to Document

10.1016/j.snb.2010.09.015

Cite this

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abstract = "Novel hierarchical sea urchin-like hollow core-shell SnO2 superstructures have been fabricated by a template-free hydrothermal method, based on an inside-out Ostwald ripening mechanism. For comparison, hollow SnO2 spheres were also prepared. It is found that the sea urchin-like hollow core-shell SnO2 superstructures exhibit nearly three times better response to ethanol than the hollow SnO2 spheres. The superior sensing performance is plausibly originated from the unique hierarchical core-shell structure with the nano-sized spikes (5-15 nm in diameter) on the shells.",

keywords = "Gas sensor, Ostwald ripening, Superstructure, Tin dioxide, Urchin",

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AU - Guo, Xuefeng

AU - Ji, Weijie

AU - Ding, Weiping

AU - AU, Chak Tong

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