Title
Sensors based on porous Pd-doped hematite (α-Fe2O 3) for LPG detection
Date Issued
2014
Access level
restricted access
Resource Type
journal article
Author(s)
Vargasmachuca O.
Lopez A.
Irusta S.
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.
Start page
79
End page
85
Volume
185
Number
21
Language
English
Scopus EID
2-s2.0-84889803714
Source
Microporous and Mesoporous Materials
ISSN of the container
1387-1811
Sponsor(s)
The authors gratefully acknowledge the financial support for this work provided by CONCYTEC (Project 371-2012-CONCYTEC-OAJ), National University of Engineering-Faculty of Sciences (Project 2012), IGI-Institute of Research of National University of Engineering (Project IGI 2012) and DGI-PUCP, Research Center of Pontifical Catholic University of Peru (Project DGI 2010-0003). The authors appreciate the collaboration of Esther Ocola, Amanda Marie Bauer and Francisco Tarazona Vasquez for language assistance.
Sources of information:
Directorio de Producción Científica