1. Redox-Active Au Nanoparticles Self-Assembled at Liquid-Liquid Interface via C-Au Functionalization for Dye Degradation Electrocatalysis
- Author
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Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Catalán Toledo, José [0000-0001-6165-1286], Djafari, Jamila [0000-0003-2817-0338], Mas Torrent, Marta [0000-0002-1586-005X], Crivillers, Núria [0000-0001-6538-2482], Catalán Toledo, José, Djafari, Jamila, Mas Torrent, Marta, Crivillers, Núria, Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), Generalitat de Catalunya, CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Catalán Toledo, José [0000-0001-6165-1286], Djafari, Jamila [0000-0003-2817-0338], Mas Torrent, Marta [0000-0002-1586-005X], Crivillers, Núria [0000-0001-6538-2482], Catalán Toledo, José, Djafari, Jamila, Mas Torrent, Marta, and Crivillers, Núria
- Abstract
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.
- Published
- 2024