Formaldehyde gas-sensing characteristics of SnO2-ZnO materials

Ho Yoon Jin; Jung Lee Hoi; Sik Kim Jung

doi:10.3365/KJMM.2010.48.02.169

Formaldehyde gas-sensing characteristics of SnO₂-ZnO materials

Ho Yoon Jin, Jung Lee Hoi, Sik Kim Jung

Department of Materials Science and Engineering

University of Seoul

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

3 Scopus citations

Abstract

A micro gas sensor for formaldehyde (HCHO) gas was fabricated by using MEMS (Micro Electro Mechanical System) technology and the sol-gel process. The sensing materials of the SnO₂-ZnO system were synthesized by the sol-gel method. The crystal structure and thermal analysis of the SnO ₂-ZnO were characterized by XRD and DSC-TGA. The fabricated gas sensors were tested at various gas concentrations (0.5-5.0 ppm) and different operation temperatures (350-550°C). The SnO₂-10 mol%ZnO sensor showed the highest sensitivity (R_s=0.24) for 1.0 ppm-formaldehyde at 500°C and response time (90% saturation time) was within 20 seconds.

Original language	English
Pages (from-to)	169-174
Number of pages	6
Journal	Journal of Korean Institute of Metals and Materials
Volume	48
Issue number	2
DOIs	https://doi.org/10.3365/KJMM.2010.48.02.169
State	Published - Feb 2010

Keywords

Electrical conductivity/resistivity
Electrical properties
Formaldehyde sensor
Nanostructured materials
Sol-gel

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10.3365/KJMM.2010.48.02.169

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title = "Formaldehyde gas-sensing characteristics of SnO2-ZnO materials",

abstract = "A micro gas sensor for formaldehyde (HCHO) gas was fabricated by using MEMS (Micro Electro Mechanical System) technology and the sol-gel process. The sensing materials of the SnO2-ZnO system were synthesized by the sol-gel method. The crystal structure and thermal analysis of the SnO 2-ZnO were characterized by XRD and DSC-TGA. The fabricated gas sensors were tested at various gas concentrations (0.5-5.0 ppm) and different operation temperatures (350-550°C). The SnO2-10 mol\%ZnO sensor showed the highest sensitivity (Rs=0.24) for 1.0 ppm-formaldehyde at 500°C and response time (90\% saturation time) was within 20 seconds.",

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AU - Jin, Ho Yoon

AU - Hoi, Jung Lee

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N2 - A micro gas sensor for formaldehyde (HCHO) gas was fabricated by using MEMS (Micro Electro Mechanical System) technology and the sol-gel process. The sensing materials of the SnO2-ZnO system were synthesized by the sol-gel method. The crystal structure and thermal analysis of the SnO 2-ZnO were characterized by XRD and DSC-TGA. The fabricated gas sensors were tested at various gas concentrations (0.5-5.0 ppm) and different operation temperatures (350-550°C). The SnO2-10 mol%ZnO sensor showed the highest sensitivity (Rs=0.24) for 1.0 ppm-formaldehyde at 500°C and response time (90% saturation time) was within 20 seconds.

AB - A micro gas sensor for formaldehyde (HCHO) gas was fabricated by using MEMS (Micro Electro Mechanical System) technology and the sol-gel process. The sensing materials of the SnO2-ZnO system were synthesized by the sol-gel method. The crystal structure and thermal analysis of the SnO 2-ZnO were characterized by XRD and DSC-TGA. The fabricated gas sensors were tested at various gas concentrations (0.5-5.0 ppm) and different operation temperatures (350-550°C). The SnO2-10 mol%ZnO sensor showed the highest sensitivity (Rs=0.24) for 1.0 ppm-formaldehyde at 500°C and response time (90% saturation time) was within 20 seconds.

KW - Electrical conductivity/resistivity

KW - Electrical properties

KW - Formaldehyde sensor

KW - Nanostructured materials

KW - Sol-gel

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JO - Journal of Korean Institute of Metals and Materials

JF - Journal of Korean Institute of Metals and Materials

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ER -

Formaldehyde gas-sensing characteristics of SnO₂-ZnO materials

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Keywords

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