TY - JOUR
T1 - Transition metals (Co, Cu) as additives on hydrothermally treated Tio 2 for gas sensing
AU - Ruiz, Ana M.
AU - Cornet, Albert
AU - Shimanoe, Kengo
AU - Morante, Joan R.
AU - Yamazoe, Noboru
N1 - Funding Information:
This work has been supported by the Spanish CICYT program MAT 99-0435-C02-01, the Japanese Monbukagakusho (MEXT) and the EU Integrated Project IST-2003-508774-IP (acronym GOODFOOD). Authors are grateful to Dr. J. Arbiol for taking the TEM pictures.
PY - 2005/7/24
Y1 - 2005/7/24
N2 - Titania-supported Cu or Co nanoparticles have been prepared with loading of 0.5 wt.% and have been tested for the detection of CO. Characterization with XRD showed that Cu and Co did not change appreciably the titania grain size. However, the anatase-to-rutile phase transformation was promoted. XPS results manifested a conspicuous coating of the additives on the TiO2 surface, and suggested chemical states of values 0 and +2 for Cu at 600 and 800 °C respectively, and +2 for Co at both calcination temperatures. The evaluation of the gas sensing properties highlighted an adequate n-type response to CO for the Cu-TiO2 and Co-TiO2 materials calcined at 600 °C, while the response of the same materials calcined at 800 °C was diminished and exhibited a p-type characteristic, which could be related to the formation of a inversion layer localized in the surface.
AB - Titania-supported Cu or Co nanoparticles have been prepared with loading of 0.5 wt.% and have been tested for the detection of CO. Characterization with XRD showed that Cu and Co did not change appreciably the titania grain size. However, the anatase-to-rutile phase transformation was promoted. XPS results manifested a conspicuous coating of the additives on the TiO2 surface, and suggested chemical states of values 0 and +2 for Cu at 600 and 800 °C respectively, and +2 for Co at both calcination temperatures. The evaluation of the gas sensing properties highlighted an adequate n-type response to CO for the Cu-TiO2 and Co-TiO2 materials calcined at 600 °C, while the response of the same materials calcined at 800 °C was diminished and exhibited a p-type characteristic, which could be related to the formation of a inversion layer localized in the surface.
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U2 - 10.1016/j.snb.2005.03.007
DO - 10.1016/j.snb.2005.03.007
M3 - Article
AN - SCOPUS:22944444492
SN - 0925-4005
VL - 109
SP - 7
EP - 12
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - 1
ER -