Sensing properties of Au-loaded SnO2-Co3O4 composites to CO and H2

U. Sung Choi; Go Sakai; Kengo Shimanoe; Noboru Yamazoe

doi:10.1016/j.snb.2004.10.033

Sensing properties of Au-loaded SnO₂-Co₃O₄ composites to CO and H₂

U. Sung Choi, Go Sakai, Kengo Shimanoe, Noboru Yamazoe

Functional Materials Science

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

72 Citations (Scopus)

Abstract

Two kinds of SnO₂-Co₃O₄ composites, SC1 and SC50, the Co₃O₄ contents of which were 1 and 50 mass%, respectively, were loaded with small amounts of Au (0.05, 0.5 and 1 mass%). The thick film device using SC1, characterized by high sensitivity to both CO and H₂ at 250 °C, was found to be made more sensitive without significant alterations of selectivity between CO and H₂ as the amount of Au-loaded increased up to 0.5%, while the addition of 1 mass% Au degraded the sensing properties seriously. Similar promoting effects of Au were recognized for the SC50-based devices, which were p-type semiconductors responding fairly selectively to CO over H₂ at 100 °C. The promoting effects of Au were discussed briefly based on the behavior of electrical resistances of the Au-loaded devices.

Original language	English
Pages (from-to)	397-401
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	107
Issue number	1 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.snb.2004.10.033
Publication status	Published - May 27 2005

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Sensing properties of Au-loaded SnO2-Co3O4 composites to CO and H2 ",

abstract = "Two kinds of SnO2-Co3O4 composites, SC1 and SC50, the Co3O4 contents of which were 1 and 50 mass%, respectively, were loaded with small amounts of Au (0.05, 0.5 and 1 mass%). The thick film device using SC1, characterized by high sensitivity to both CO and H2 at 250 °C, was found to be made more sensitive without significant alterations of selectivity between CO and H2 as the amount of Au-loaded increased up to 0.5%, while the addition of 1 mass% Au degraded the sensing properties seriously. Similar promoting effects of Au were recognized for the SC50-based devices, which were p-type semiconductors responding fairly selectively to CO over H2 at 100 °C. The promoting effects of Au were discussed briefly based on the behavior of electrical resistances of the Au-loaded devices.",

author = "Choi, {U. Sung} and Go Sakai and Kengo Shimanoe and Noboru Yamazoe",

note = "Funding Information: This study was partially supported by a grant-in-aid for scientific research from The Ministry of Education, Culture, Sports, Science and Technology of Japan. ",

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AU - Choi, U. Sung

AU - Sakai, Go

AU - Shimanoe, Kengo

AU - Yamazoe, Noboru

N1 - Funding Information: This study was partially supported by a grant-in-aid for scientific research from The Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Y1 - 2005/5/27

N2 - Two kinds of SnO2-Co3O4 composites, SC1 and SC50, the Co3O4 contents of which were 1 and 50 mass%, respectively, were loaded with small amounts of Au (0.05, 0.5 and 1 mass%). The thick film device using SC1, characterized by high sensitivity to both CO and H2 at 250 °C, was found to be made more sensitive without significant alterations of selectivity between CO and H2 as the amount of Au-loaded increased up to 0.5%, while the addition of 1 mass% Au degraded the sensing properties seriously. Similar promoting effects of Au were recognized for the SC50-based devices, which were p-type semiconductors responding fairly selectively to CO over H2 at 100 °C. The promoting effects of Au were discussed briefly based on the behavior of electrical resistances of the Au-loaded devices.

AB - Two kinds of SnO2-Co3O4 composites, SC1 and SC50, the Co3O4 contents of which were 1 and 50 mass%, respectively, were loaded with small amounts of Au (0.05, 0.5 and 1 mass%). The thick film device using SC1, characterized by high sensitivity to both CO and H2 at 250 °C, was found to be made more sensitive without significant alterations of selectivity between CO and H2 as the amount of Au-loaded increased up to 0.5%, while the addition of 1 mass% Au degraded the sensing properties seriously. Similar promoting effects of Au were recognized for the SC50-based devices, which were p-type semiconductors responding fairly selectively to CO over H2 at 100 °C. The promoting effects of Au were discussed briefly based on the behavior of electrical resistances of the Au-loaded devices.

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ER -

Sensing properties of Au-loaded SnO₂-Co₃O₄ composites to CO and H₂

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