Application of chromium doped titanium dioxide in solar-to-chemical energy conversion

Abstract

The thesis postulates that the photocatalytic performance of semiconducting materials based on nonstoichiometric compounds, such as TiO2-based solid solutions, is determined by point defects. Therefore, the performance of the studied solid solutions in solar energy conversion may be considered in terms of defect-related properties. The present research project aimed at verification of the postulate of the thesis. The ultimate aim was to understand the effect of chromium on defect disorder of TiO2 and its defect-related properties, such as photocatalytic properties. The research involved the determination of the effect of processing conditions of Cr-doped TiO2 on chromium segregation and the related concentration gradients of defects within the surface layer that is active photo-catalytically. The strategic aim of the research is to develop a new technology of the conversion of solar energy into chemical energy. Such technology may lead to the reduction of the costs of water processing and elimination of the use for this purpose of the electrical energy produced from fossil fuels. Ultimately, the technology could reduce global warming and climate change.

Date of Award	2018
Original language	English