Synthesis of Polythiophene-Silver Nanocomposites in Ionic Liquid for Catalytic Applications

Autor(es)

Tavares, Flavia ; Oliveira, Larissa V. F. ; Hajjar-Garreau, Samar ; Camilo, Fernanda F.

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED POLYMER MATERIALS; v. 6, n. 7, p. 11-pg., 2024-04-03.

Resumo

This study presents an approach to synthesizing a nanocomposite of polythiophene and silver nanoparticles (PBT/Ag), which addresses the challenge of AgNP aggregation and its impact on the catalytic efficiency. The reaction was performed under mild conditions using an ionic liquid, specifically bis(trifluoromethylsulfonyl)imide (Tf2N) 1-butyl-3-methylimidazolium (BMIm), which acted as both a solvent and a template. The nanocomposite contained uniformly dispersed spherical silver nanoparticles with an average diameter of around 10 nm in polythiophene doped with Tf2N anions. The catalytic efficiency of the composite was assessed by reducing 4-nitrophenol to 4-aminophenol using sodium borohydride. This transformation converts environmentally harmful 4-nitrophenol into the less toxic 4-aminophenol, a crucial intermediate in pharmaceuticals, such as paracetamol. The composite displayed notable efficiency, achieving a 99.9% conversion rate within 10 min, and exhibited recyclability over multiple cycles. This study represents the first use of a polythiophene derivative and a silver nanoparticle composite as a heterogeneous catalyst, marking an advancement in catalysis and materials science. (AU)

• Processo FAPESP: 21/07971-8 - Preparação de análogos de produtos naturais combinados com nanopartículas de prata e sua aplicação contra a bactéria resistente Mycobacterium abscessus
• Beneficiário: Larissa Verena Figueiredo de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/08582-5 - EMU concedido no processo 17/17844-8:Analisador térmico - TG/DTA modelo sta 2500 TG/DTA TEMP. ambiente a 1100 °c
• Beneficiário: Tereza da Silva Martins
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 21/08987-5 - Membranas de celulose como suporte para nanomateriais: preparação e avaliação de propriedades
• Beneficiário: Fernanda Ferraz Camilo
• Modalidade de apoio: Auxílio à Pesquisa - Regular