Towards atomic level vanadium doping of TiO2 via liquid-phase atomic layer deposition

Vanadium-doping of TiO2 at the atomic level was achieved via a liquid phase atomic layer deposition (L-ALD) method. UV–vis absorption edge of vanadium-doped TiO2 has been red-shifted ∼55 nm into visible light region. Photocatalytical assessment reveals that the degradation rate of methylene blue (MB) for vanadium-doped TiO2 under visible light illumination was enhanced by up to 500% compared to the undoped TiO2. This improvement was believed to be attributed to the atomic level doping of the L-ALD method.

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► A new, liquid-phase atomic layer deposition has enabled atomic level doping of TiO2.
► Vanadium doping of TiO2 via L-ALD results in redshift of band edge by up to 55 nm.
► Up to 500% increase of visible light photocatalytic activity is seen in the V-doped TiO2.