School of Chemistry and Chemical Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150001, China.
School of Chemistry and Chemical Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150001, China; Institute of Culture and Heritage, Northwestern Polytechnical University, Xi'an, 710000, China.
Chemosphere. 2022 Sep;303(Pt 2):135105. doi: 10.1016/j.chemosphere.2022.135105. Epub 2022 May 28.
The immobilized coatings as a kind of promising Fenton-like catalysts with excellent performance and reusability for the efficient degradation of antibiotics and phenol under solar light irradiation is investigated. Herein, the porous γ-FeO/SiO immobilized ceramic coating on TC4 titanium alloy as photo-Fenton catalyst was prepared via plasma electrolytic oxidation technology. The as-obtained immobilized coating manifested a remarkable catalytic activity that the removal efficiencies of phenol and various antibiotics could reach more than 92% within 90 min, and presented excellent reusability after six runs in phenol removal. The high activity and excellent reusability of γ-FeO were attributed to the synergistic effect of multiple pathways to jointly produce abundant •OH, and the combination of γ-FeO and SiO in the coating could effectively reduce iron leaching during the heterogeneous photo-Fenton process, respectively. This work provides a novel strategy for the synthesis of high-performance photo-Fenton catalysts to dispose of wastewater in the future.
将固定化涂层作为一种很有前途的类芬顿催化剂，用于在太阳光照射下高效降解抗生素和苯酚，具有优异的性能和可重复使用性。本研究采用等离子体电解氧化技术，在 TC4 钛合金上制备了多孔γ-FeO/SiO 固定化陶瓷涂层作为光芬顿催化剂。所获得的固定化涂层表现出显著的催化活性，在 90 分钟内，苯酚和各种抗生素的去除效率均超过 92%，在六次苯酚去除循环后仍具有良好的可重复使用性。γ-FeO 的高活性和优异的可重复使用性归因于多种途径协同产生丰富•OH 的协同效应，以及涂层中γ-FeO 和 SiO 的结合可以有效减少非均相光芬顿过程中的铁浸出。这项工作为未来合成高性能光芬顿催化剂处理废水提供了一种新策略。
