Recoverable and Reusable Polymer Microbead-Supported Metal Nanocatalysts for Redox Chemical Transformations

Autor(es)

Fernandes, Arthur B. ^[1] ; Pavliuk, V, Mariia ; Paun, Cristina ^[2] ; Carvalho, Alexandrina C. ^[1] ; Nomura, Cassiana S. ^[1] ; Lewin, Erik ^[3] ; Lindblad, Rebecka ^[3] ; Camargo, Pedro H. C. ^{[1, 4]} ; Sa, Jacinto ^{[5, 2]} ; Bastos, Erick L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP - Brazil

^[2] Pavliuk, Mariia, V, Uppsala Univ, Dept Chem, Phys Chem Div, Angstrom Lab, S-75120 Uppsala - Sweden

^[3] Uppsala Univ, Dept Chem, Inorgan Chem Div, Angstrom Lab, S-75120 Uppsala - Sweden

^[4] Univ Helsinki, Dept Chem, FI-00014 Helsinki - Finland

^[5] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw - Poland

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 3, n. 2, p. 1722-1730, FEB 2020.
• Citações Web of Science: 0

Resumo

Metal nanoparticles have been widely exploited in catalysis, but their full impact on the environment and human health is still under debate. Here we describe the one-step fabrication of recoverable and reusable polymer microbead-supported metal and metal oxide nanocatalysts for application in batch reactions and flow systems. Au, Ag, and Fe3O4 nanoparticles were prepared directly at the surface of commercial benzylamine-coated spherical polymer beads in water by using low-energy microwave radiation for 5 min. The functionalization of microbead surface with betalamic acid, an antioxidant from plant origin, before irradiation changes the morphology and catalytic properties of the grafted nanoparticles. No leaching of the active phase was observed during the application of these effective and ready-to-use nanocatalysts on the reduction of 4-nitrophenol and oxidation of dihydrorhodamine 123. The supported nanocatalysts were recovered by filtration and/or magnetic separation and reused up to three times without significant drop in catalytic performance. These results can stimulate the controlled and facile synthesis of recoverable microbead-supported magnetic and nonmagnetic nanocatalysts that can be applied under myriad reaction conditions and reused multiple times. (AU)

• Processo FAPESP: 14/22136-4 - Uso de solventes verdes e suas misturas na otimização de processos químicos
• Beneficiário: Omar Abou El Seoud
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/10346-2 - Desenvolvimento de método de análises quantitativas diretas de materiais silicosos: espectrometria de emissão óptica com plasma induzido por laser e fluorescência de raio-x por reflexão total
• Beneficiário: Cassiana Seimi Nomura
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/08450-1 - Mediadores naturais fotoredox e fotobioredox
• Beneficiário: Erick Leite Bastos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/06391-8 - Caracterização fotofísica e potencial anti-inflamatório de betalaínas
• Beneficiário: Erick Leite Bastos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/25629-4 - Uso de betalaínas para a fabricação de nanopartículas fluorescentes
• Beneficiário: Arthur Bonfá Fernandes
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto