Please use this identifier to cite or link to this item:
Title: Intercalated layered clay composites and their applications
Researcher: Phukan, Anjali
Guide(s): Dutta, Dipak Kumar
Keywords: Antiracemization
University: Gauhati University
Completed Date: 31/12/2005
Abstract: Supported inorganic reagents are rapidly emerging as new and environmentally acceptable reagents and catalysts. The smectite group of layered clay minerals, such as, Montmorillonite, provides promising character for adsorption, catalytic activity, supports etc. for their large surface area, swelling behavior and ion exchange properties. Aromatic compounds intercalated in layered clays are useful in optical molecular devices. Clay is a unique material for adsorption of heavy metals and various toxic substances. Clay surfaces are known to be catalytically active due to their surface acidity. Acid activated clays possess much improved surface areas and acidities and have higher pore volumes so that can absorb large molecules in the pores. The exchangeable cations in clay minerals play a key role in controlling surface acidity and catalytic activity. Recently, optically active metal-complex-Montmorillonite composites are reported to be active in antiracemization purposes. In view of the above, a research work, relating to the preparation of different modified clay composites and their catalytic applications were carried out. The different aspects and results of the present work have been reported in four major chapters. Chapter I: This is an introductory chapter, which contains a review of the literature regarding clay-based materials. Clay minerals are phyllosilicates with layer structure. Montmorillonite, a member of smectite group of clay, is 2:1 phyllosilicate, where a layer is composed of an octahedral sheet sandwiched by two tetrahedral sheets. Such clay shows cation exchange capacity (CEC) and is expressed in milli-equivalents per 100 gm of dry clay. Clays can be modified by interaction with metal ion, metal complexes, metal cluster and organic cations for various applications. Clays are also modified by treating with acid followed by impregnation with metal salts or ions. Montmorillonite can intercalate suitable metal complexes in excess of CEC to form double or pseudo-trilayer composites. Metal ion and metal
Appears in Departments:Department of Chemistry

Files in This Item:
File Description SizeFormat 
01_title page.pdfAttached File18.25 kBAdobe PDFView/Open
02_certificate.pdf52.19 kBAdobe PDFView/Open
03_declaration.pdf12.23 kBAdobe PDFView/Open
04_acknowledgement.pdf76.28 kBAdobe PDFView/Open
05_dedicated.pdf98.19 kBAdobe PDFView/Open
06_content.pdf148.92 kBAdobe PDFView/Open
07_abstract.pdf208.21 kBAdobe PDFView/Open
08_list of figures.pdf154.88 kBAdobe PDFView/Open
09_list of tables.pdf37.95 kBAdobe PDFView/Open
10_chapter 1.pdf1.42 MBAdobe PDFView/Open
11_chapter 2.pdf824.9 kBAdobe PDFView/Open
12_results and discussion.pdf2.65 MBAdobe PDFView/Open
13_conclusion.pdf248.31 kBAdobe PDFView/Open
14_bibliography.pdf611.56 kBAdobe PDFView/Open
15_list of publication.pdf500.29 kBAdobe PDFView/Open

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