CoO–TiO2 is 16–24 times more effective than TiO2, it is sunlight active at room temperature.
Co-photocatalysis enhances the degradation potential of well known catalyst (e.g., TiO2).
CoO is a very powerful co-photocatalyst to enhance the activity of TiO2.
Co-TiO2 degrades paraoxon into p-nitrophenol and p-benzoquinone under environmental conditions.