Date of Completion
10-10-2014
Embargo Period
10-9-2015
Keywords
Mesoporous materials, UCT materials, manganese oxide, heteregeneous catalysis
Major Advisor
Steven L. Suib
Associate Advisor
Alfredo Angeles-Boza
Associate Advisor
James F. Rusling
Associate Advisor
Pamir S. Alpay
Associate Advisor
Edward J. Neth
Field of Study
Chemistry
Degree
Doctor of Philosophy
Open Access
Open Access
Abstract
There are 4 chapters in this thesis. Chapter 1 provides background information (synthesis, applications, and limitations) about mesoporous materials. Chapter 2 describes the developed inverse micelle method for the synthesis of mesoporous materials and illustrates the applicability of the method. Chapter 3 discusses mesoporous solid acids prepared by inverse micelle method and their catalytic activity. Chapter 4 suggests a mild transformation of mesoporous manganese oxides into various other crystal structures under mild acidic conditions.
Thermally stable, crystalline wall, thermally controlled monomodal pore size mesoporous materials are discussed in the thesis. Generation of such materials involves use of inverse micelles, elimination of solvent effects, minimization the effect of water content, and controlling the condensation of inorganic framework by NOx decomposition. Nano-size particles are formed in inverse micelles and are randomly packed to a mesoporous structure. The mesopores are created by interconnected intra-particle voids, thus can be tuned from 1.2 nm to 25 nm by controlling the nano-particle size. Such phenomena allow preparation of multiple phases of the same metal and syntheses of materials having compositions throughout much of the periodic table. The method has been demonstrated to work for numerous transition metal oxides like Ti, Zr, Hf, Nb, Ta, Cr, W, Mn, Fe, Co, Ni, Cu, Zn, Zr,; nonmetals like Al, Si, Sn, lanthanides (La, Ce, Sm. Gd), and mixed metals (YSZ, Alumina Silicate etc). Thermal stabilities can be as high as 800oC. The mesopores are monomodal in distribution and allow unique adsorptive and catalytic properties. Such materials have unique properties that will allow use in adsorption, catalysis, sensors, batteries, optoelectronics, magnetic, and other areas.
Recommended Citation
Poyraz, Altug Suleyman, "A Generic Approach for the Synthesis of Nanocrystalline Mesoporous Materials by Inverse Micelle Templating" (2014). Doctoral Dissertations. 569.
https://digitalcommons.lib.uconn.edu/dissertations/569