Ethanol gas sensor based on Al-doped ZnO nanomaterial with many gas diffusing channels

Zunxian Yang; Yun Huang; Guonan Chen; Zaiping Guo; Shuying Cheng; Shizhen Huang

doi:10.1016/j.snb.2009.04.052

Ethanol gas sensor based on Al-doped ZnO nanomaterial with many gas diffusing channels

Zunxian Yang
, Yun Huang
, Guonan Chen
, Zaiping Guo
, Shuying Cheng
, Shizhen Huang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

201 Citations (Scopus)

Abstract

ZnO nanomaterial with multi-microstructures is synthesized by using normal pressure thermal evaporation and then doped with different Al₂O₃ contents by grinding in an agate mortar. The as-prepared Al-doped ZnO nanomaterials are characterized by X-ray diffraction and scanning electron microscopy. The characterization results show that all the compounds are wurtzite with hexagonal structure and are well crystallized. Channels/connecting holes arising from many kinds of ZnO microstructures are abundant. Both annealing and Al₂O₃-doping contributes to an increase in the quasi-one-dimensional and tri-dimensional microstructures. The as-prepared Al-doped ZnO nanomaterials show excellent gas responses to ethanol. The sensing mechanism of the ZnO-based nanomaterials with multi-microstructures is further analyzed by using the Effective Specific Surface Model. Excellent sensitivity (∼200) companied with short response time (∼8 s) and recovery time (∼10 s) to 3000 ppm ethanol is obtained with a ZnO-based sensor with 2 at.% Al₂O₃ at the operating temperature of ∼290 °C after the sensor is annealed at 500 °C. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	549-556
Journal	Sensors and Actuators, B: Chemical
Volume	140
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2009.04.052
Publication status	Published - 16 Jul 2009
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (20735002). Part of the work is funded by the Postdoctoral Foundation Program of Fuzhou University (BSH-0601), the Natural Science Foundation Program of Fujian province (A0510011), and the Talents Foundation Program of Fuzhou University.

Research Keywords

Al-doped ZnO
Effective Specific Surface Model
Ethanol
Highly sensitive gas sensor

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title = "Ethanol gas sensor based on Al-doped ZnO nanomaterial with many gas diffusing channels",

abstract = "ZnO nanomaterial with multi-microstructures is synthesized by using normal pressure thermal evaporation and then doped with different Al2O3 contents by grinding in an agate mortar. The as-prepared Al-doped ZnO nanomaterials are characterized by X-ray diffraction and scanning electron microscopy. The characterization results show that all the compounds are wurtzite with hexagonal structure and are well crystallized. Channels/connecting holes arising from many kinds of ZnO microstructures are abundant. Both annealing and Al2O3-doping contributes to an increase in the quasi-one-dimensional and tri-dimensional microstructures. The as-prepared Al-doped ZnO nanomaterials show excellent gas responses to ethanol. The sensing mechanism of the ZnO-based nanomaterials with multi-microstructures is further analyzed by using the Effective Specific Surface Model. Excellent sensitivity (∼200) companied with short response time (∼8 s) and recovery time (∼10 s) to 3000 ppm ethanol is obtained with a ZnO-based sensor with 2 at.\% Al2O3 at the operating temperature of ∼290 °C after the sensor is annealed at 500 °C. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

keywords = "Al-doped ZnO, Effective Specific Surface Model, Ethanol, Highly sensitive gas sensor",

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AU - Huang, Yun

AU - Chen, Guonan

AU - Guo, Zaiping

AU - Cheng, Shuying

AU - Huang, Shizhen

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - ZnO nanomaterial with multi-microstructures is synthesized by using normal pressure thermal evaporation and then doped with different Al2O3 contents by grinding in an agate mortar. The as-prepared Al-doped ZnO nanomaterials are characterized by X-ray diffraction and scanning electron microscopy. The characterization results show that all the compounds are wurtzite with hexagonal structure and are well crystallized. Channels/connecting holes arising from many kinds of ZnO microstructures are abundant. Both annealing and Al2O3-doping contributes to an increase in the quasi-one-dimensional and tri-dimensional microstructures. The as-prepared Al-doped ZnO nanomaterials show excellent gas responses to ethanol. The sensing mechanism of the ZnO-based nanomaterials with multi-microstructures is further analyzed by using the Effective Specific Surface Model. Excellent sensitivity (∼200) companied with short response time (∼8 s) and recovery time (∼10 s) to 3000 ppm ethanol is obtained with a ZnO-based sensor with 2 at.% Al2O3 at the operating temperature of ∼290 °C after the sensor is annealed at 500 °C. © 2009 Elsevier B.V. All rights reserved.

AB - ZnO nanomaterial with multi-microstructures is synthesized by using normal pressure thermal evaporation and then doped with different Al2O3 contents by grinding in an agate mortar. The as-prepared Al-doped ZnO nanomaterials are characterized by X-ray diffraction and scanning electron microscopy. The characterization results show that all the compounds are wurtzite with hexagonal structure and are well crystallized. Channels/connecting holes arising from many kinds of ZnO microstructures are abundant. Both annealing and Al2O3-doping contributes to an increase in the quasi-one-dimensional and tri-dimensional microstructures. The as-prepared Al-doped ZnO nanomaterials show excellent gas responses to ethanol. The sensing mechanism of the ZnO-based nanomaterials with multi-microstructures is further analyzed by using the Effective Specific Surface Model. Excellent sensitivity (∼200) companied with short response time (∼8 s) and recovery time (∼10 s) to 3000 ppm ethanol is obtained with a ZnO-based sensor with 2 at.% Al2O3 at the operating temperature of ∼290 °C after the sensor is annealed at 500 °C. © 2009 Elsevier B.V. All rights reserved.

KW - Al-doped ZnO

KW - Effective Specific Surface Model

KW - Ethanol

KW - Highly sensitive gas sensor

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Ethanol gas sensor based on Al-doped ZnO nanomaterial with many gas diffusing channels

Abstract

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