Phthalocyanine/TiO2 and Porphyrin /TiO2 Photocatalysts Used in Processes under Mild Conditions

Composite materials prepared by loading polycrystalline TiO2 powders with lipophilic highly branched Cu(II) and metal-free phthalocyanines or porphyrins, have been used as photocatalysts to promote photo degradative processes as well as the efficient photoreduction of carbon dioxide in aqueous suspension affording significant amounts of formic acid.