NO2 Gas Sensing Properties of Nano-Sized In2O3 Doped WO3 Powders Prepared from Polymer Solution Route

Dong Min Kim; Sang-Jin Lee

doi:10.3740/MRSK.2018.28.1.12

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NO² Gas Sensing Properties of Nano-Sized In₂O₃ Doped WO₃ Powders Prepared from Polymer Solution Route 폴리머 용액법에 의한 In₂O₃ 첨가 나노 WO₃ 분말 합성 및 NO₂ 가스 센서 특성

January 2018. pp. 12-17

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Abstract

In₂O₃ doped WO₃ powders were prepared by a polymer solution route and their NO₂ gas sensing properties were analyzed. The synthesized powders showed nano-sized particles with specific surface areas of 6.01~21.5 m²/g and the particle size and shape changed according to the content of In₂O₃. The gas sensors fabricated with the synthesized powders were tested at operating temperatures of 400~500 °C and 100~500 ppm concentrations of NO₂ atmosphere. The particle size and In₂O₃ content affected on the initial sensor resistance in an air atmosphere. The highest sensitivity (8.57 at 500 °C), which was 1.77 higher than the sensor consisting of the pure WO₃ sample, was measured in the 0.5 mol% In₂O₃ doping sample. In addition, the response time and recovery time were improved by the addition of In₂O₃.

Keywords

WO₃

In₂O₃

polymer solution route

nano-powder

NO₂ gas sensor

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 28
No :1
Pages :12-17
Received Date : 2017-10-22
Revised Date : 2017-11-10
Accepted Date : 2017-11-13
DOI :https://doi.org/10.3740/MRSK.2018.28.1.12

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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