Photocatalytic Activities of Layered Titanates and Niobates Ion-Exchanged with Sn2+ under Visible Light Irradiation

Energy gaps (EG) of Sn2+-exchanged layered metal oxides, Sn2+/KTiNbO5, Sn2+/K4Nb6O17, Sn2+/CsTi2NbO7, Sn2+/K2Ti4O9, Sn2+/K2Ti2O5, and Sn2+/Cs2Ti6O13, were 0.7−1.2 eV narrower than those of the orig...

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