Special Topic 6.29 Excitons and redox reactions on a semiconductor

Special Topic 6.29 Excitons and redox reactions on a semiconductor 

Photocatalytic reductions are less common because the reducing ability of an electron in the conduction band is considerably lower than the oxidizing ability of a positively charged valence band. Furthermore, reduction of most organic compounds usually cannot compete kinetically with that of oxygen.170 Photoreductions in aqueous solutions are often accompanied by the production of molecular hydrogen. 

Semiconductors, such as Ti02, can be prepared in the laboratory by annealing (pyrolysis) of various TiIV compounds, such as titanium isopropoxide, Ti[OCH(CH3)2]4.170 The resulting semiconductor properties, such as surface area, morphology, particle size and 

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