TY - JOUR
T1 - Oxygen adsorption on ZrO2-loaded SnO2 gas sensors in humid atmosphere
AU - Suematsu, Koichi
AU - Uchino, Hotaka
AU - Mizukami, Takaharu
AU - Watanabe, Ken
AU - Shimanoe, Kengo
N1 - Funding Information:
This work was partially supported by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI), Grant Numbers JP16H04219 and JP17K17941. We would like to thank Editage (www.editage.jp) for English language editing.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Oxygen adsorption on the surface of particles plays a key role in gas sensing for SnO2-based resistive-type gas sensors in a humid atmosphere. In this study, we added an extremely small amount of ZrO2 on the SnO2 surface to activate oxygen adsorption and enhance the sensor response of a SnO2-based gas sensor in a humid atmosphere. We evaluated the oxygen adsorption properties and sensor response to 200 ppm H2 in a humid atmosphere (96%) based on variations in the measured electrical resistance. The adsorption of O− and O2− ions was activated by a small loading (0.033 mol%) of ZrO2, and the resulting ZrO2–SnO2 composite nanoparticles were in the deep electron-depleted state. This led to a high sensor response of ZrO2–SnO2 to H2 in a humid atmosphere. The results demonstrate that surface modification using an extremely small amount of ZrO2 was effective in improving the response of a SnO2-based gas sensor in a humid atmosphere.
AB - Oxygen adsorption on the surface of particles plays a key role in gas sensing for SnO2-based resistive-type gas sensors in a humid atmosphere. In this study, we added an extremely small amount of ZrO2 on the SnO2 surface to activate oxygen adsorption and enhance the sensor response of a SnO2-based gas sensor in a humid atmosphere. We evaluated the oxygen adsorption properties and sensor response to 200 ppm H2 in a humid atmosphere (96%) based on variations in the measured electrical resistance. The adsorption of O− and O2− ions was activated by a small loading (0.033 mol%) of ZrO2, and the resulting ZrO2–SnO2 composite nanoparticles were in the deep electron-depleted state. This led to a high sensor response of ZrO2–SnO2 to H2 in a humid atmosphere. The results demonstrate that surface modification using an extremely small amount of ZrO2 was effective in improving the response of a SnO2-based gas sensor in a humid atmosphere.
UR - http://www.scopus.com/inward/record.url?scp=85055449963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055449963&partnerID=8YFLogxK
U2 - 10.1007/s10853-018-3020-y
DO - 10.1007/s10853-018-3020-y
M3 - Article
AN - SCOPUS:85055449963
SN - 0022-2461
VL - 54
SP - 3135
EP - 3143
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 4
ER -