Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection

Zhijie Li; Zhijie Lin; Ningning Wang; Yanwu Huang; Junqiang Wang; Wei Liu; Yong Qing Fu; Zhiguo Wang

doi:10.1016/j.matdes.2016.08.035

Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection

Zhijie Li, Zhijie Lin, Ningning Wang, Yanwu Huang, Junqiang Wang, Wei Liu, Yong Qing Fu, Zhiguo Wang

Mathematics, Physics and Electrical Engineering

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

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Abstract

The α-Fe2O3 micro-ellipsoids were prepared using a facile hydrothermal process without any surfactant or template, and their morphological, structural and H2S sensing properties were investigated. The α-Fe2O3 showed uniform micro-ellipsoids with a long axis diameter of 1.7 μm and a short axis diameter of 1.2 μm. Detailed structural analysis confirmed that the synthesized α-Fe2O3 micro-ellipsoids were compact particles with a hexagonal structure. Gas sensor base on the α-Fe2O3 micro-ellipsoids showed excellent response, short response/recovery time (<90 s and 30 s, respectively), low detection concentration (~ 0.5 ppm), good long-term stability and excellent selectivity towards H2S gas at the optimized operating temperature of 350 °C. The sensing mechanism of the sensor based on the α-Fe2O3 micro-ellipsoids towards H2S was discussed.

Original language	English
Pages (from-to)	532-539
Journal	Materials & Design
Volume	110
Early online date	10 Aug 2016
DOIs	https://doi.org/10.1016/j.matdes.2016.08.035
Publication status	Published - 15 Nov 2016

Keywords

α-Fe2O3
Micro-ellipsoid
Hydrothermal
H2S
Gas sensor

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10.1016/j.matdes.2016.08.035

Material Design-accepted manuscriptAccepted author manuscript, 1.01 MB

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@article{3499e3d553a446e98c99f40fb1fa461d,

title = "Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection",

abstract = "The α-Fe2O3 micro-ellipsoids were prepared using a facile hydrothermal process without any surfactant or template, and their morphological, structural and H2S sensing properties were investigated. The α-Fe2O3 showed uniform micro-ellipsoids with a long axis diameter of 1.7 μm and a short axis diameter of 1.2 μm. Detailed structural analysis confirmed that the synthesized α-Fe2O3 micro-ellipsoids were compact particles with a hexagonal structure. Gas sensor base on the α-Fe2O3 micro-ellipsoids showed excellent response, short response/recovery time (<90 s and 30 s, respectively), low detection concentration (~ 0.5 ppm), good long-term stability and excellent selectivity towards H2S gas at the optimized operating temperature of 350 °C. The sensing mechanism of the sensor based on the α-Fe2O3 micro-ellipsoids towards H2S was discussed.",

keywords = "α-Fe2O3, Micro-ellipsoid, Hydrothermal, H2S, Gas sensor",

author = "Zhijie Li and Zhijie Lin and Ningning Wang and Yanwu Huang and Junqiang Wang and Wei Liu and Fu, {Yong Qing} and Zhiguo Wang",

year = "2016",

month = nov,

day = "15",

doi = "10.1016/j.matdes.2016.08.035",

language = "English",

volume = "110",

pages = "532--539",

journal = "Materials & Design",

issn = "0261-3069",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection

AU - Li, Zhijie

AU - Lin, Zhijie

AU - Wang, Ningning

AU - Huang, Yanwu

AU - Wang, Junqiang

AU - Liu, Wei

AU - Fu, Yong Qing

AU - Wang, Zhiguo

PY - 2016/11/15

Y1 - 2016/11/15

N2 - The α-Fe2O3 micro-ellipsoids were prepared using a facile hydrothermal process without any surfactant or template, and their morphological, structural and H2S sensing properties were investigated. The α-Fe2O3 showed uniform micro-ellipsoids with a long axis diameter of 1.7 μm and a short axis diameter of 1.2 μm. Detailed structural analysis confirmed that the synthesized α-Fe2O3 micro-ellipsoids were compact particles with a hexagonal structure. Gas sensor base on the α-Fe2O3 micro-ellipsoids showed excellent response, short response/recovery time (<90 s and 30 s, respectively), low detection concentration (~ 0.5 ppm), good long-term stability and excellent selectivity towards H2S gas at the optimized operating temperature of 350 °C. The sensing mechanism of the sensor based on the α-Fe2O3 micro-ellipsoids towards H2S was discussed.

AB - The α-Fe2O3 micro-ellipsoids were prepared using a facile hydrothermal process without any surfactant or template, and their morphological, structural and H2S sensing properties were investigated. The α-Fe2O3 showed uniform micro-ellipsoids with a long axis diameter of 1.7 μm and a short axis diameter of 1.2 μm. Detailed structural analysis confirmed that the synthesized α-Fe2O3 micro-ellipsoids were compact particles with a hexagonal structure. Gas sensor base on the α-Fe2O3 micro-ellipsoids showed excellent response, short response/recovery time (<90 s and 30 s, respectively), low detection concentration (~ 0.5 ppm), good long-term stability and excellent selectivity towards H2S gas at the optimized operating temperature of 350 °C. The sensing mechanism of the sensor based on the α-Fe2O3 micro-ellipsoids towards H2S was discussed.

KW - α-Fe2O3

KW - Micro-ellipsoid

KW - Hydrothermal

KW - H2S

KW - Gas sensor

U2 - 10.1016/j.matdes.2016.08.035

DO - 10.1016/j.matdes.2016.08.035

M3 - Article

SN - 0261-3069

SN - 1873-4197

VL - 110

SP - 532

EP - 539

JO - Materials & Design

JF - Materials & Design

ER -

Facile synthesis of α-Fe2O3 micro-ellipsoids by surfactant-free hydrothermal method for sub-ppm level H2S detection

Abstract

Keywords

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