Department of Physics, Thiagarajar College, Affiliated to Madurai Kamaraj University, Madurai, Tamil Nadu, 625009, India.
Department of Physics, Thiagarajar College, Affiliated to Madurai Kamaraj University, Madurai, Tamil Nadu, 625009, India.
Chemosphere. 2024 Aug;362:142736. doi: 10.1016/j.chemosphere.2024.142736. Epub 2024 Jun 29.
Developing high-performance and durable catalysts presents a significant challenge for oxidizing toxic inorganic and pharmaceutical compounds in wastewater. Recently, there has been a surge in the development of new heterogeneous catalysts for degrading pharmaceutical compounds, driven by advancements in electrocatalysts and photoelectrocatalysts. In this study, a plasmonic Ag nanoparticles decorated CoFeO@TiO heteronanostructures have been successfully designed to fabricate a high-performing photoelectrode for the oxidation of pharmaceutical compounds. The developed Ag-CoFeO@TiO possessed a higher electrochemical stability and effectively harvested the UV to visible and NIR radiation in sunlight which generates the enormous photochemical reactive species that involved in the oxidation of ibuprofen in wastewater. Under direct sunlight irradiation, Ag-CoFeO@TiO achieved complete oxidation of ibuprofen in wastewater at 0.8 V vs RHE. This indicates that metallic Ag nanoparticles are involved in the charge separation and transport of charge carriers from the photoactive sites of CoFeO@TiO, promoting the generation of abundant hydroxy, oxy, and superoxide radicals that actively break the bonds of ibuprofen. Additionally, oxidation agents such as urea and HO were utilized to enhance the formation of superoxide ions and hydroxyl radicals, which rapidly participate in the oxidation of ibuprofen. Significantly, testing for recyclability confirmed the stability of the Ag-CoFeO@TiO photoanode, ensuring its suitability for prolonged use in photoelectrochemical advanced oxidation processes. Integrating Ag-CoFeO@TiO photoanodes into water purification systems could enhance economic feasibility, reduce energy consumption, and improve efficiency.
开发高性能和耐用的催化剂对于氧化废水中有毒的无机和药物化合物是一个重大挑战。最近，由于电催化剂和光电极催化剂的进步，用于降解药物化合物的新型多相催化剂的开发呈指数增长。在这项研究中，成功设计了等离子体 Ag 纳米颗粒修饰的 CoFeO@TiO 杂化纳米结构，以制备用于氧化药物化合物的高性能光电极。所开发的 Ag-CoFeO@TiO 具有更高的电化学稳定性，并有效地利用太阳光中的紫外至可见和近红外辐射，产生大量光化学反应性物质，参与废水中布洛芬的氧化。在阳光直射下，Ag-CoFeO@TiO 在 0.8 V 相对于 RHE 下实现了废水中布洛芬的完全氧化。这表明金属 Ag 纳米颗粒参与了 CoFeO@TiO 光活性位点的电荷分离和载流子的传输，促进了丰富的羟基、氧基和超氧自由基的生成，这些自由基积极地打破了布洛芬的键。此外，还使用氧化剂如尿素和 HO 来增强超氧离子和羟基自由基的形成，它们迅速参与布洛芬的氧化。值得注意的是，对可循环性的测试证实了 Ag-CoFeO@TiO 光阳极的稳定性，确保其适合在光电化学高级氧化过程中长时间使用。将 Ag-CoFeO@TiO 光阳极集成到水净化系统中可以提高经济可行性、降低能源消耗并提高效率。
