Stable Ti3+ self-doped TiO2 with tunable phase composition and highly efficient visible-light photoactivity (ca. 32.7 times stronger than an undoped sample for ˙OH formation) was synthesized via a facile metallic zinc-assisted method. The surface Ti3+ species can be stabilized by Zn doping, and the photocatalytic selectivity can be regulated by the phase composition.
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