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Synthesis, characterization and correlation with the catalytic activity of efficient mesoporous niobia and mesoporous niobia–zirconia mixed oxide catalyst system

Paper ID Volume ID Publish Year Pages File Format Full-Text
49320 46736 2016 5 PDF Available
Title
Synthesis, characterization and correlation with the catalytic activity of efficient mesoporous niobia and mesoporous niobia–zirconia mixed oxide catalyst system
Abstract

•Mesoporous niobia–zirconia catalyst has been prepared.•The change in acidity by varying niobia–zirconia ratios was observed.•Acidity was explained by Kung's model.•High conversion of cyclohexanone oxime has been demonstrated.

Mesoporous mixed oxide has always remained as a subject of interest due to diffusion relaxation and generation of new surface potential and acidity by mixing of different stoichiometries of metal oxide. To deliver more insight on niobia based catalyst, herein, we have synthesized mesoporous niobia and five different mole ratios of niobia–zirconia mixed oxide. The catalysts were characterized by XRD, N2-physisorption, FTIR, UV–Vis and NH3-TPD techniques. Less distorted NbO6 octahedra and NbOH or Nb–OH–Zr are found to act as Bronsted center responsible for reaction. The results established the role of Kung model to generate acidic sites in mesoporous mixed oxide.

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Keywords
Mesoporous; Mixed oxide; Niobia–zirconia; Beckmann; Kung model
First Page Preview
Synthesis, characterization and correlation with the catalytic activity of efficient mesoporous niobia and mesoporous niobia–zirconia mixed oxide catalyst system
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 77, 5 March 2016, Pages 42–46
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis