Improved H2S gas sensing properties of ZnO nanorods decorated by a several nm ZnS thin layer.
Phys Chem Chem Phys
; 16(26): 13434-9, 2014 Jul 14.
Article
em En
| MEDLINE
| ID: mdl-24887567
ABSTRACT
To avoid a spontaneous reaction between ZnO gas sensing materials and detected H2S gas, ZnO nanorods decorated with a several nm ZnS thin layer were designed. The ZnS-decorated layer was prepared by passivating oriented ZnO nanorods in a H2S atmosphere. The effect of the passivation processes on the H2S sensing properties was investigated. It was found that ZnO nanorods decorated with a 2 nm-thick ZnS layer possessed a repeatable and superior response to ppm-level H2S at room temperature. Moreover, a confinement effect was proposed to explain the improved sensing properties of the decorated ZnO nanorods.
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1
Base de dados:
MEDLINE
Assunto principal:
Sulfetos
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Óxido de Zinco
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Compostos de Zinco
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Condutometria
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Nanotubos
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Poluentes Atmosféricos
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Sulfeto de Hidrogênio
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Modelos Químicos
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article