Sensing properties of Pd-loaded Co3O4 film for a ppb-level NO gas sensor.
Sensors (Basel)
; 15(4): 8109-20, 2015 Apr 07.
Article
em En
| MEDLINE
| ID: mdl-25853408
ABSTRACT
We prepared 0.1 wt%-30 wt% Pd-loaded Co3O4 by a colloidal mixing method and investigated the sensing properties of a Pd-loaded Co3O4 sensor element, such as the sensor response, 90% response time, 90% recovery time, and signal-to-noise (S/N) ratio, toward low nitric oxide (NO) gas levels in the range from 50 to 200 parts per billion. The structural properties of the Pd-loaded Co3O4 powder were investigated using X-ray diffraction analysis and transmission electron microscopy. Pd in the powder existed as PdO. The sensor elements with 0.1 wt%-10 wt% Pd content have higher sensor properties than those without any Pd content. The response of the sensor element with a 30 wt% Pd content decreased markedly because of the aggregation and poor dispersibility of the PdO particles. High sensor response and S/N ratio toward the NO gas were achieved when a sensor element with 10 wt% Pd content was used.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óxidos
/
Paládio
/
Cobalto
/
Óxido Nítrico
Idioma:
En
Revista:
Sensors (Basel)
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Japão