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

20 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

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Wang, C., Zeng, W., Luo, L., Zhang, P., & Wang, Z. (Accepted/In press). Gas-sensing properties and mechanisms of Cu-doped SnO₂ spheres towards H₂S. Ceramics International. https://doi.org/10.1016/j.ceramint.2016.03.103

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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.",

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AU - Wang, Chenxi

AU - Zeng, Wen

AU - Luo, Longjing

AU - Zhang, Peige

AU - Wang, Zhongchang

PY - 2016/1/19

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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.

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KW - First-principles calculation

KW - Gas sensing

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