DSpace About DSpace Software

Dyuthi @ CUSAT >
Applied Chemistry >
Faculty >
Dr. Sugunan S >

Please use this identifier to cite or link to this item: http://purl.org/purl/2175

Title: Effect of vanadia on physico-chemical and catalytic characteristics of dysprosia
Authors: Sugunan, S
Renuka, N K
Keywords: Physico-chemical characterization
Issue Date: Apr-2002
Publisher: Indian Journal of Chemistry
Abstract: Physico-chemical characterization of DY203/V2O5 systems prepared through wet impregnation method has been carried out using various techniques like EDX, XRD, FTIR. thermal studies, BET surface area, pore volume and pore size distribution analysis. The amount of vanadia incorporated has been found to influence the surface properties of dysprosia. The spectroscopic results combining with X-ray analysis reveal that vanadia species exist predominantly as isolated amorphous vanadyl units along with crystalline dysprosium orthovanadate. Basicity studies have been conducted by adsorption of electron acceptors and acidity and acid strength distribution by temperature programmed desorption of ammonia. Cyclohexanol decomposition has been employed as a chemical probe reaction to examine the effect of vanadia on the acid base property of Dy2O3. Incorporation of vanadia titrates thc Lewis acid and base sites of Dy2O3, while an enhancement of Bronsted acid sites has been noticed. Data have been correlated with the catalytic activity of these oxides towards the vapour phase methylation of phenol
URI: http://dyuthi.cusat.ac.in/purl/2175
Appears in Collections:Dr. Sugunan S

Files in This Item:

File Description SizeFormat
Dyuthi-SS11.pdfPDF806.6 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback