期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 13, 页码 15348-15361出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b22056
关键词
photocatalysis; antibacterial; thin films; TiO2; CVD; hybrid-DFT
资金
- King Abdulaziz City for Science and Technology (KACST), Saudi Arabia
- Saudi Cultural Bureau in London
- EPSRC [EP/P020194/1, EP/L000202, EP/R029431]
- Imperial College
- Royal Society [RSG\R1\180434]
- EPSRC [EP/P020194/1] Funding Source: UKRI
Multifunctional thin films which can display both photocatalytic and antibacterial activity are of great interest industrially. Here, for the first time, we have used aerosol-assisted chemical vapor deposition to deposit highly photoactive thin films of Cudoped anatase TiO2 on glass substrates. The films displayed much enhanced photocatalytic activity relative to pure anatase and showed excellent antibacterial (vs Staphylococcus aureus and Escherichia coli) ability. Using a combination of transient absorption spectroscopy, photoluminescence measurements, and hybrid density functional theory calculations, we have gained nanoscopic insights into the improved properties of the Cu-doped TiO2 films. Our analysis has highlighted that the interactions between substitutional and interstitial Cu in the anatase lattice can explain the extended exciton lifetimes observed in the doped samples and the enhanced UV photoactivities observed.
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