Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
The National Centre for Building and Construction Technology, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442-6086, Saudi Arabia.
ACS Appl Mater Interfaces. 2020 Apr 1;12(13):15348-15361. doi: 10.1021/acsami.9b22056. Epub 2020 Mar 18.
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 Cu-doped anatase TiO on glass substrates. The films displayed much enhanced photocatalytic activity relative to pure anatase and showed excellent antibacterial (vs and ) 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 TiO 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.
具有光催化和抗菌活性的多功能薄膜在工业上具有很大的应用价值。在这里，我们首次使用气溶胶辅助化学气相沉积法在玻璃基底上沉积了高活性的掺铜锐钛矿 TiO2 薄膜。与纯锐钛矿相比，该薄膜显示出了更高的光催化活性，并表现出了优异的抗菌性能（对 和 ）。通过瞬态吸收光谱、光致发光测量和杂化密度泛函理论计算的结合，我们深入了解了掺铜 TiO2 薄膜性能改善的微观机制。我们的分析表明，锐钛矿晶格中替位和间隙 Cu 之间的相互作用可以解释掺杂样品中观察到的扩展激子寿命和增强的紫外光活性。
