Products and nucleation analysis of photoelectrochemical reduction of cupric ions in the CuSO4—methanol—TiO2 suspension system

Bactericidal Activity of Copper-Deposited TiO2 Thin Film under Weak UV Light Illumination

“…In contrast, the survival decreased on the Cu/TiO 2 film even in the dark, which demonstrated that copper deposited to a TiO 2 film has antibacterial activity in the dark. It has been reported that the copper species photodeposited on TiO 2 particles in the suspension or on the TiO 2 film are a mixture of metallic copper (Cu(0)) and Cu 2 O, and these species are oxidized and dissolved under exposure to air in the dark ( − ). The copper ions taken into the cytoplasmic membrane disorder the function and structure of the membrane, extinguishing cellular activity ().…”

A surface science perspective on TiO2 photocatalysis

“…Similar 'cooperative' effects may be responsible for enhanced photoreduction rates in mixed metal cation systems (e.g., Cu 2+ and Cr 6+ [1130], and Fe 3+ and Cr 6+ [1134]). Finally, Wang and Wan [1148] have shown that dissolution processes can complicate the issue of identifying reduction and nucleation sites. These authors have shown that Cu 2+ can be reduced to surface Cu + species (e.g., suboxides), which under certain conditions are dissolved back into solution and further reduced to Cu metal, potentially at different surface sites on the photocatalyst.…”