Year

2021

Degree Name

Doctor of Philosophy

Department

Institute for Superconducting & Electronic Materials (ISEM)

Abstract

This thesis presents a combined strategy to prepare photocatalysts, that merges the design, modification, and characterization of semiconductor materials. A photocatalyst is defined as a substance that can be activated by absorbing a photon because this material is able to accelerate a reaction without being consumed by it. This thesis focusses on the degradation of Rhodamine B, as a model organic compound, representative of organic pollutant found in the environment A catalyst works in the presence of light through light absorption and excitation across the bandgap inside the semiconductors.

This thesis introduces a design strategy to improve the catalyst structure and chemistry, first by using a template approach with a high surface area, such as metal-organic frameworks and using high-temperature treatments in conjunction with a reducing gas flow (typically 5% hydrogen gas and 95% argon as inert carrier gas) to increase the harvesting the light by partially reducing the oxide.

FoR codes (2008)

020502 Lasers and Quantum Electronics

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Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.