TY - JOUR
T1 - Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection
AU - Picasso, G.
AU - Sun Kou, M. R.
AU - Vargasmachuca, O.
AU - Rojas, J.
AU - Zavala, C.
AU - Lopez, A.
AU - Irusta, S.
PY - 2014/2/1
Y1 - 2014/2/1
N2 - In this work, sensors based on nanoparticles of α-Fe 2O3 doped with different amounts of Pd ranging from 0.1 to 1.0 wt.% were prepared by coprecipitation for liquefied petroleum gas (LPG) detection. Solids were characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), adsorption-desorption of N2 (BET surface), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Sample tests of Pd-doped sensors showed much higher sensitivity than the undoped one revealing the promotion electronic effect of Pd2+ on the surface reaction. Among all samples, the sensor with 0.75 wt.% Pd presented the highest gas response at 300 C in all gas tested concentrations, likely due to the highest BET surface, well-defined hematite crystalline structure and best surface contact over Pd surface via electronic mechanism.
AB - In this work, sensors based on nanoparticles of α-Fe 2O3 doped with different amounts of Pd ranging from 0.1 to 1.0 wt.% were prepared by coprecipitation for liquefied petroleum gas (LPG) detection. Solids were characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), adsorption-desorption of N2 (BET surface), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Sample tests of Pd-doped sensors showed much higher sensitivity than the undoped one revealing the promotion electronic effect of Pd2+ on the surface reaction. Among all samples, the sensor with 0.75 wt.% Pd presented the highest gas response at 300 C in all gas tested concentrations, likely due to the highest BET surface, well-defined hematite crystalline structure and best surface contact over Pd surface via electronic mechanism.
KW - Gas sensor
KW - LPG detection
KW - Pd-doped α-FeO
UR - http://www.scopus.com/inward/record.url?scp=84889803714&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2013.11.014
DO - 10.1016/j.micromeso.2013.11.014
M3 - Article
AN - SCOPUS:84889803714
SN - 1387-1811
VL - 185
SP - 79
EP - 85
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
ER -