Redox-Active Au Nanoparticles Self-Assembled at Liquid-Liquid Interface via C-Au Functionalization for Dye Degradation Electrocatalysis
This work presents the synthesis of poly(vinylpyrrolidone)-stabilized gold nanoparticles (Au NPs) and their subsequent functionalization with molecules bearing terminal alkynes. The ligand exchange occurs at the liquid-liquid interface (LLI), resulting in the formation of Au NPs stabilized through t...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:302032 |
| Acesso em linha: | https://ddd.uab.cat/record/302032 https://dx.doi.org/urn:doi:10.1021/acsanm.3c05982 |
| Access Level: | acceso abierto |
| Palavra-chave: | Au nanoparticles Carbon-gold functionalization Liquid-liquid interface assembly Redox-activity Electrocatalysis |
| Resumo: | This work presents the synthesis of poly(vinylpyrrolidone)-stabilized gold nanoparticles (Au NPs) and their subsequent functionalization with molecules bearing terminal alkynes. The ligand exchange occurs at the liquid-liquid interface (LLI), resulting in the formation of Au NPs stabilized through the covalent C-Au functionalization. Simultaneously, structured composite films are formed, driven by the self-assembly of the Au NPs supported by the polymer. A comparative analysis involving three distinct alkyne-terminated derivatives reveals that film formation is favored when the ligand includes an aromatic unit such as in a ferrocenyl-stilbene derivative. The LLI films can be easily transferred to solid a support for their characterization. Additionally, it is demonstrated that these films serve as a potential electrocatalytic platform. As a proof of concept, we demonstrate that the electrochemically active ferrocene-based Au NPs films can efficiently remove methylene blue via an electro-Fenton-like reaction, surpassing the efficiency of the non-redox phenylacetylene Au NP films. |
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