NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(08) [August 2011] >

Title: Surface acidic properties of sulphated Fe2O3-TiO2
Authors: Raj, K Joseph Antony
Prakash, M G
Shanmugam, R
Krishnamurthy, K R
Viswanathan, B
Keywords: Catalysis
Density functional calculations
Sulphated iron oxide
Iron oxide
Issue Date: Aug-2011
Publisher: NISCAIR-CSIR, India
Abstract: Mixed iron and titanium oxides with varying quantities of sulphate species have been prepared by sulphation of ilmenite followed by calcination. A combined approach involving DFT and DRIFT spectroscopy has been adopted to determine the appropriate structure for adsorption of pyridine on sulphated Fe2O3-TiO2 (SFT). The DRIFT spectra obtained for pyridine adsorbed SFT samples show equal number of Brønsted and Lewis acid sites. The TG-DTG analysis reveals the greater affinity for water and hydroxyl groups on SFT. Evaluation of IR frequencies for various structures based on DFT demonstrates that the adsorption of water/hydroxyl groups on S and/or Fe leads to the conversion of Lewis acid sites into Brønsted acid sites. Investigation of Mulliken charges for Fe, Ti, S and N for the pyridine adsorbed SFT structures demonstrates the preferable adsorption of pyridine on sulphur rather than on Fe.
Page(s): 1050-1055
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(08) [August 2011]

Files in This Item:

File Description SizeFormat
IJCA 50A(8) 1050-1055.pdf526.33 kBAdobe PDFView/Open
 Current Page Visits: 122 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 166339 since 01-Sep-2015  Last updated on 28-Jun-2016Webmaster: