Gas-sensing properties and mechanisms of Cu-doped SnO2 spheres towards H2S

Chenxi Wang; Wen Zeng; Longjing Luo; Peige Zhang; Zhongchang Wang

doi:10.1016/j.ceramint.2016.03.103

Gas-sensing properties and mechanisms of Cu-doped SnO₂ spheres towards H₂S

Chenxi Wang, Wen Zeng, Longjing Luo, Peige Zhang, Zhongchang Wang

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

30 Citations (Scopus)

Abstract

We report on the synthesis of pristine and Cu-doped SnO₂ spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO₂-based sensors toward H₂S. We find that Cu doping can enhance significantly the gas response of SnO₂ toward H₂S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H₂S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H₂S and Cu-doped surface is stronger than that between adsorbed H₂S and pure surface, which consequently improves gas-sensing performances of SnO₂ toward H₂S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO₂.

Original language	English
Journal	Ceramics International
DOIs	https://doi.org/10.1016/j.ceramint.2016.03.103
Publication status	Accepted/In press - 2016 Jan 19

Keywords

Cu doping
First-principles calculation
Gas sensing
SnO spheres

ASJC Scopus subject areas

Ceramics and Composites
Process Chemistry and Technology
Electronic, Optical and Magnetic Materials
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2016.03.103

Cite this

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title = "Gas-sensing properties and mechanisms of Cu-doped SnO2 spheres towards H2S",

abstract = "We report on the synthesis of pristine and Cu-doped SnO2 spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO2-based sensors toward H2S. We find that Cu doping can enhance significantly the gas response of SnO2 toward H2S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H2S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H2S and Cu-doped surface is stronger than that between adsorbed H2S and pure surface, which consequently improves gas-sensing performances of SnO2 toward H2S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO2.",

keywords = "Cu doping, First-principles calculation, Gas sensing, SnO spheres",

author = "Chenxi Wang and Wen Zeng and Longjing Luo and Peige Zhang and Zhongchang Wang",

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T1 - Gas-sensing properties and mechanisms of Cu-doped SnO2 spheres towards H2S

AU - Wang, Chenxi

AU - Zeng, Wen

AU - Luo, Longjing

AU - Zhang, Peige

AU - Wang, Zhongchang

PY - 2016/1/19

Y1 - 2016/1/19

N2 - We report on the synthesis of pristine and Cu-doped SnO2 spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO2-based sensors toward H2S. We find that Cu doping can enhance significantly the gas response of SnO2 toward H2S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H2S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H2S and Cu-doped surface is stronger than that between adsorbed H2S and pure surface, which consequently improves gas-sensing performances of SnO2 toward H2S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO2.

AB - We report on the synthesis of pristine and Cu-doped SnO2 spheres using a facile hydrothermal method and investigate their microstructures and gas-sensing response. We focus on how Cu doping can have an impact on gas-sensing behavior of SnO2-based sensors toward H2S. We find that Cu doping can enhance significantly the gas response of SnO2 toward H2S, the origin of which can be clarified with a proposed adsorption model. First-principles calculations reveal that adsorption energy of H2S on Cu-doped surface is lower than that on undoped one and the interaction between adsorbed H2S and Cu-doped surface is stronger than that between adsorbed H2S and pure surface, which consequently improves gas-sensing performances of SnO2 toward H2S. Such a combined experimental and calculational study offers an explanation on how Cu doping affects gas-sensing performances of SnO2.

KW - Cu doping

KW - First-principles calculation

KW - Gas sensing

KW - SnO spheres

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