Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection

Gino Picasso-Escobar; M. R. Sun Kou; O. Vargasmachuca; J. Rojas; C. Zavala; A. Lopez; S. Irusta

Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection

Gino Picasso-Escobar, M. R. Sun Kou, O. Vargasmachuca, J. Rojas, C. Zavala, A. Lopez, S. Irusta

Sección de Química

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

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. © 2013 Elsevier Inc. All rights reserved.

Original language	Spanish
Pages (from-to)	79-85
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	185
State	Published - 1 Feb 2014

Cite this

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title = "Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection",

abstract = "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. {\textcopyright} 2013 Elsevier Inc. All rights reserved.",

author = "Gino Picasso-Escobar and {Sun Kou}, {M. R.} and O. Vargasmachuca and J. Rojas and C. Zavala and A. Lopez and S. Irusta",

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TY - JOUR

T1 - Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection

AU - Picasso-Escobar, Gino

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. © 2013 Elsevier Inc. All rights reserved.

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. © 2013 Elsevier Inc. All rights reserved.

M3 - Artículo

SN - 1387-1811

VL - 185

SP - 79

EP - 85

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -