Hierarchically rosette-like In2O3 microspheres for volatile organic compounds gas sensors

Hongxing Dong; Yang Liu; Guanghui Li; Xuewen Wang; Dan Xu; Zhanghai Chen; Ting Zhang; Jun Wang; Long Zhang

doi:10.1016/j.snb.2012.12.103

Hierarchically rosette-like In₂O₃ microspheres for volatile organic compounds gas sensors

Hongxing Dong, Yang Liu, Guanghui Li, Xuewen Wang, Dan Xu, Zhanghai Chen, Ting Zhang, Jun Wang, Long Zhang

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Nanosheet-based three-dimensional (3D) hierarchical rosette-like In ₂O₃ microspheres and hollow microspheres are successfully prepared by a hydrothermal and subsequent annealing process. The formation mechanism of In(OH)₃(En)₂ microsphere precursors is investigated systematically, and the possible chemical reactions at each stage are proposed. The complexing agent and the surfactant are the two important factors to control the morphologies and microstructures of the final products. The as-synthesized hierarchical In₂O₃ microspheres show excellent sensing response to volatile organic compounds such as acetone and toluene gases. The detection limit can be as low as ∼500 ppb level in atmosphere. In addition, the sensing mechanism based on the change of surface resistance is discussed. Such novel In₂O₃ microspheres may be a promising candidate for sensor application in detecting acetone or toluene in different environments.

Original language	English
Pages (from-to)	302-309
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	178
DOIs	https://doi.org/10.1016/j.snb.2012.12.103
State	Published - 2013
Externally published	Yes

Keywords

Formation process
Gas sensing
Hydrothermal synthesis
Nanostructure

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10.1016/j.snb.2012.12.103

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title = "Hierarchically rosette-like In2O3 microspheres for volatile organic compounds gas sensors",

abstract = "Nanosheet-based three-dimensional (3D) hierarchical rosette-like In 2O3 microspheres and hollow microspheres are successfully prepared by a hydrothermal and subsequent annealing process. The formation mechanism of In(OH)3(En)2 microsphere precursors is investigated systematically, and the possible chemical reactions at each stage are proposed. The complexing agent and the surfactant are the two important factors to control the morphologies and microstructures of the final products. The as-synthesized hierarchical In2O3 microspheres show excellent sensing response to volatile organic compounds such as acetone and toluene gases. The detection limit can be as low as ∼500 ppb level in atmosphere. In addition, the sensing mechanism based on the change of surface resistance is discussed. Such novel In2O3 microspheres may be a promising candidate for sensor application in detecting acetone or toluene in different environments.",

keywords = "Formation process, Gas sensing, Hydrothermal synthesis, Nanostructure",

author = "Hongxing Dong and Yang Liu and Guanghui Li and Xuewen Wang and Dan Xu and Zhanghai Chen and Ting Zhang and Jun Wang and Long Zhang",

year = "2013",

doi = "10.1016/j.snb.2012.12.103",

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volume = "178",

pages = "302--309",

journal = "Sensors and Actuators, B: Chemical",

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TY - JOUR

T1 - Hierarchically rosette-like In2O3 microspheres for volatile organic compounds gas sensors

AU - Dong, Hongxing

AU - Liu, Yang

AU - Li, Guanghui

AU - Wang, Xuewen

AU - Xu, Dan

AU - Chen, Zhanghai

AU - Zhang, Ting

AU - Wang, Jun

AU - Zhang, Long

PY - 2013

Y1 - 2013

N2 - Nanosheet-based three-dimensional (3D) hierarchical rosette-like In 2O3 microspheres and hollow microspheres are successfully prepared by a hydrothermal and subsequent annealing process. The formation mechanism of In(OH)3(En)2 microsphere precursors is investigated systematically, and the possible chemical reactions at each stage are proposed. The complexing agent and the surfactant are the two important factors to control the morphologies and microstructures of the final products. The as-synthesized hierarchical In2O3 microspheres show excellent sensing response to volatile organic compounds such as acetone and toluene gases. The detection limit can be as low as ∼500 ppb level in atmosphere. In addition, the sensing mechanism based on the change of surface resistance is discussed. Such novel In2O3 microspheres may be a promising candidate for sensor application in detecting acetone or toluene in different environments.

AB - Nanosheet-based three-dimensional (3D) hierarchical rosette-like In 2O3 microspheres and hollow microspheres are successfully prepared by a hydrothermal and subsequent annealing process. The formation mechanism of In(OH)3(En)2 microsphere precursors is investigated systematically, and the possible chemical reactions at each stage are proposed. The complexing agent and the surfactant are the two important factors to control the morphologies and microstructures of the final products. The as-synthesized hierarchical In2O3 microspheres show excellent sensing response to volatile organic compounds such as acetone and toluene gases. The detection limit can be as low as ∼500 ppb level in atmosphere. In addition, the sensing mechanism based on the change of surface resistance is discussed. Such novel In2O3 microspheres may be a promising candidate for sensor application in detecting acetone or toluene in different environments.

KW - Formation process

KW - Gas sensing

KW - Hydrothermal synthesis

KW - Nanostructure

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U2 - 10.1016/j.snb.2012.12.103

DO - 10.1016/j.snb.2012.12.103

M3 - 文章

AN - SCOPUS:84872772444

SN - 0925-4005

VL - 178

SP - 302

EP - 309

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

Hierarchically rosette-like In₂O₃ microspheres for volatile organic compounds gas sensors

Abstract

Keywords

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