Ghiloufi Mabrouka, Schnabel Tobias, Mehling Simon, Kouass Salah
Laboratory of Materials: Treatment and Analysis, National Institute of Research and Physico-Chemical Analysis, Faculty of Sciences of Bizerte, Carthage University, Ariana 2020, Tunisia.
Research Group "Photonics and Water", Institute for Sustainable Water Systems, Hof University of Applied Sciences, 95028 Hof, Germany.
Materials (Basel). 2024 Sep 23;17(18):4671. doi: 10.3390/ma17184671.
The effects of various additives (YO, GaO, and WO) on photocatalytic degradation efficiency under UV light-emitting diodes (LEDs) and the optical properties of TiO Degussa P25 were investigated using ketoprofen and diclofenac, two non-steroidal anti-inflammatory drugs commonly detected in German rivers. Experimental results demonstrated that thin films containing these additives exhibited similar photocatalytic degradation efficiencies as pure TiO, achieving a 30% degradation of ketoprofen over 150 min. In contrast, the YO/TiO thin film showed significantly improved performance, achieving a 46% degradation of ketoprofen in 180 min. Notably, the YO/TiO system was three times more effective in degrading diclofenac compared to pure TiO. Additionally, the YO/TiO photocatalyst retained its activity over three successive cycles with only a slight decrease in efficiency. The photocatalytic degradation of both organic pollutants followed first-order kinetics with all photocatalysts. The investigation included SEM imaging to assess the surface homogeneity of the thin films and UV-vis solid-state spectroscopy to evaluate the impact of the additives on the energy band gap of TiO.
使用酮洛芬和双氯芬酸这两种在德国河流中常见的非甾体抗炎药，研究了各种添加剂（YO、GaO和WO）对紫外发光二极管（LED）下光催化降解效率以及二氧化钛德固赛P25光学性质的影响。实验结果表明，含有这些添加剂的薄膜表现出与纯二氧化钛相似的光催化降解效率，在150分钟内酮洛芬降解率达到30%。相比之下，YO/二氧化钛薄膜性能显著提高，在180分钟内酮洛芬降解率达到46%。值得注意的是，与纯二氧化钛相比，YO/二氧化钛体系降解双氯芬酸的效率高出两倍。此外，YO/二氧化钛光催化剂在三个连续循环中保持其活性，效率仅略有下降。所有光催化剂对两种有机污染物的光催化降解均遵循一级动力学。该研究包括扫描电子显微镜成像以评估薄膜的表面均匀性，以及紫外可见固态光谱以评估添加剂对二氧化钛能带隙的影响。
