Document Type

Thesis

Degree

Master of Science (MS)

Department

Chemistry

First Advisor's Name

Kevin E. O'Shea

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

William J. Cooper

Third Advisor's Name

Ramon Lopez de la Vega

Fourth Advisor's Name

Stanislaw Wnuk

Date of Defense

11-20-2001

Abstract

Two studies were performed to obtain fundamental mechanistic information on the TiO2 catalyzed degradation of organic substrates irradiated at 350 nm in dilute aqueous solutions under oxygenated conditions: (a) The photodecomposition of methyl tert-butyl ether (MTBE) and its intermediate products from β - oxidation, 2-methoxy-2-methylpropanol and 2-methoxy-2-methylpropanal. (b) The photodecomposition of two haloethers, bis-(2-chloroethyl) ether, and bis-(2-chloroisopropyl) ether. Controls were carried out throughout the two studies in the absence of light, and without the semiconductor in order to evaluate the role of photolysis.

The syntheses of proposed intermediate products, 2-methoxy-2-methylpropanol, 2-methoxy-2-methylpropanal, 2-methoxy-2-methylpropanoic acid, 2-chloroethyl formate, and 1-chloro-2-propyl acetate, were performed. The formation of these products in the titanium dioxide photocatalytic oxidation of the substrates of interest was also confirmed. TiO2 photocatalysis is a very effective method for the mineralization of aliphatic ethers and their primary oxidation products.

Identifier

FI14061553

Included in

Chemistry Commons

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