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나노입자 연구단
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Morphology and Gas-Sensing Properties of Tin Oxide Foams with Dual Pore Structure

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Title
Morphology and Gas-Sensing Properties of Tin Oxide Foams with Dual Pore Structure
Author(s)
Nam, K; Kim, HG; Choi, H; Park, H; Jin Soo Kang; Yung-Eun Sung; Lee, HC; Choe, H
Publication Date
2017-06
Journal
JOURNAL OF ELECTRONIC MATERIALS, v.46, no.6, pp.3748 - 3756
Publisher
SPRINGER
Abstract
Tin oxide is a commonly used gas-sensing material, which can be applied as an n- or p-type gas sensor. To improve the gas-sensing performance of tin oxide, we successfully synthesized tin oxide foam via an ice-templating or freeze-casting method. The tin oxide foam samples showed different morphological features depending on the major processing parameters, which include sintering temperature, sintering time, and the amount of added powder. Based on scanning electron microscopy images, we could identify dual pore structure of tin oxide foam containing 'wall' pores ranging from 5.3 mu m to 10.7 mu m, as well as smaller secondary pores (a few micrometers in size) on the wall surfaces. Gas-sensing performance tests for the synthesized tin oxide foams reveal a sensitivity of 13.1, a response time of 192 s, and a recovery time of 160 s at an ethanol gas concentration of 60 ppm at 300A degrees C. This is a remarkable result given that it showed p-type semiconductor behavior and was used without the addition of any catalyst. (c) 2017 The Minerals, Metals & Materials Society
URI
https://pr.ibs.re.kr/handle/8788114/4246
ISSN
0361-5235
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
16. Nam_et_al-2017-Journal of Electronic Materials.pdfDownload

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