Title: Fabrication of Predominantly Mn⁴⁺- Doped TiO₂ Nanoparticles under Equilibrium Conditions and Their Application as Visible-Light Photocatalyts

Abstract: Electronic structure tailoring plays a key role in enabling oxides with a wide band gap for effective applications in the fields of low‐cost photovoltaic cells and photocatalysis under visible light. To date, however, the overall picture for visible‐light absorption is still rather complicated, as the chemical states of dopants and native defects associated with oxygen deficiency vary with the synthetic conditions. In their Full Paper on page 1904 ff., Junhua Hu et al. use a near‐equilibrium fabrication process to control the chemical state of a transition metal dopant (Mn) as well as oxygen vacancies. This work sheds new light on the origin of the significant visible‐light absorption of TiO₂ through doping.