College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China; The Egyptian Chinese University (ECU), Cairo, Egypt.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
Chemosphere. 2024 Sep;364:143309. doi: 10.1016/j.chemosphere.2024.143309. Epub 2024 Sep 10.
Herein, coupling of noble metal-free plasmonic copper nanoparticles with tungsten suboxide and supporting on zeolite nanoclay (Cu/WO@ZNC) composite will be introduced for bi-functional photocatalytic ciprofloxacin (CIP) degradation and water photothermal evaporation under visible/infrared (Vis/IR) exposure. Reduced band-gap of WO via oxygen vacancies creation and localized surface plasmon resonance (LSPR) formation by Cu nanoparticles contributed significantly the extension and intensification of composite's photo-absorption range. Furthermore, small mesoporous structure of ZNC enhanced CIP adsorption and charge carriers separation where the reported photocatalytic efficiencies were 88.3 and 81.7% upon IR and Vis light exposure respectively. It was evidenced that plasmonic hot electrons (e.s) and hydroxyl radicals (OH) performed the basic functions of the photocatalytic process. At the other side, oxygen vacancies existence, plasmonic effect, and confining thermal characteristics of WO, Cu, and ZNC correspondingly induced water photothermal evaporation with efficiencies up to 97.5 and 72.8% under IR and Vis illumination respectively. This work introduces synthesis of a novel bi-functional photocatalytic-photothermal composite by metal sub-oxide and non-noble metal plasmonic coupling and supporting on naturally-derived carrier for water restoration under broad spectral exposure.
在此，将介绍一种将无贵金属等离子体铜纳米粒子与氧化钨耦合，并负载在沸石纳米粘土（Cu/WO@ZNC）复合材料上的方法，用于在可见光/红外（Vis/IR）照射下双功能光催化环丙沙星（CIP）降解和水光热蒸发。通过 Cu 纳米粒子形成的氧空位和局域表面等离子体共振（LSPR），WO 的带隙减小，显著扩展和增强了复合材料的光吸收范围。此外，ZNC 的小孔结构增强了 CIP 的吸附和载流子分离，在红外光和可见光照射下，报道的光催化效率分别为 88.3%和 81.7%。实验证明，等离子体热电子（e.s）和羟基自由基（OH）是光催化过程的基本功能。另一方面，氧空位的存在、等离子体效应以及 WO、Cu 和 ZNC 的限制热特性相应地诱导了水的光热蒸发，在红外光和可见光照射下，效率分别高达 97.5%和 72.8%。这项工作通过金属亚氧化物和非贵金属等离子体的耦合，并负载在天然载体上，合成了一种新型的双功能光催化-光热复合材料，用于在宽光谱照射下进行水的修复。
