Title
Sensors based on porous Pd-doped hematite (alpha-Fe2O3) for LPG detection
Date Issued
2014
Access level
restricted access
Resource Type
journal article
Author(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