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Silver- and copper-modified decahedral anatase titania particles as visible light-responsive plasmonic photocatalyst

“…Therefore, titania has been surface modified with organic and inorganic compounds, [9][10][11] and doped with various cations and anions, [11][12][13][14] which caused either narrowing of its bandgap 15 or photoinduced charge transfer between the titania and modifier. [16][17][18] It must be pointed out that modification could significantly influence the photocatalytic performance under UV irradiation, and in some cases, a decrease in photocatalytic activity has been observed since modifiers/dopants could also work as recombination centers for electrons and holes. Noble metals are one of the most extensively studied surface modifiers since they significantly inhibit the e − ∕h þ recombination under UV irradiation working as an electron sink, [19][20][21][22][23] and they can activate titania toward visible light irradiation due to localized surface plasmon resonance (LSPR), thus being so-called "plasmonic photocatalysts."…”