Recyclable UV and visible light photocatalytically active amorphous TiO2 doped with M (III) ions (MÂ =Â Cr and Fe)

▶ The low photocatalytic activity of amorphous TiO2 was enhanced by doping with Cr(III) or Fe(III) ions. ▶ The doped catalysts performed close to P25 under UV light and better with visible light. ▶ The doped catalysts can be recycled.