| Title |
Anchoring of silver nanoparticles by a zinc-porphyrin covalent organic framework for synergistic photodynamic sterilization |
| ID_Doc |
15350 |
| Authors |
Fu, QB; Zhang, TT; An, MZ; Sun, X; Li, YJ; Zhang, BW; Zhang, SK; Waterhouse, GIN; Liu, XN; Li, HS; Ai, SY |
| Title |
Anchoring of silver nanoparticles by a zinc-porphyrin covalent organic framework for synergistic photodynamic sterilization |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.cej.2024.152293 |
| Abstract |
Porphyrin-based covalent organic frameworks (Por-COFs) show great promise in photodynamic sterilization and elimination of pathogenic bacteria. In this work, a two-dimensional Por-COF was constructed using 5,10,15,20Tetrakis-(4-aminophenyl)-porphine-Zn(II) (Zn-TAPP) and Dihydroxyterephthalaldehyde (Dha), which was postsynthetically modified with silver nanoparticles (Ag NPs). Ag@ZnPor-COF delivered extraordinary photodynamic inactivation performance against Staphylococcus aureus and Escherichia coli under visible light (99.96 % and 99.75 %, respectively, within 20 min). The localized surface plasmon resonance of the Ag NPs enhanced the absorption of visible light whilst also aiding electron-hole separation, leading to efficient generation of reactive oxygen species (ROS), especially singlet oxygen (1O2). Further, the Ag NPs imparted Ag@ZnPor-COF with photothermal properties, thereby delivering even more effective control of pathogenic bacteria. Density functional theory (DFT) calculations validated the experimental findings, identifying Ag@ZnPor-COF as a potent antibacterial platform. Results encourage the wider use of Por-COFs and plasmonic nanomaterials in the development of antibacterial systems. |
| Author Keywords |
Porphyrin-based covalent organic frameworks; Ag NPs; Photodynamic sterilization; Density functional theory |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001244268800001 |
| WoS Category |
Engineering, Environmental; Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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