Product selectivity of ketone and azine in the photocatalytic dehydrazonation of aromatic hydrazones with TiO 2 -based photocatalysts has been investigated using solar light. Product selectivity is dependent on the nature of the photocatalysts, substituents and the solvents. Loading of metals on TiO 2 -P25 selectively enhances the formation of azine from benzophenone hydrazone. Solvents such as dichloromethane, chloroform, ethanol, and 2-propanol enhance the formation of azine under solar irradiation. Structures of products have been established by FT-IR, 1 H-NMR, 13 C-NMR, and GC-MS spectrometry. Supplementary materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.