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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 10
Affiliation:
[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
Total Affiliations: 5
Document type: Journal article
Source: ACS APPLIED NANO MATERIALS; v. 3, n. 2, p. 1722-1730, FEB 2020.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 14/22136-4 - Use of green solvents and their mixtures for optimizing chemical processes
Grantee:Omar Abou El Seoud
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/10346-2 - Method development for direct quantitative analysis of high silicon content samples: laser-induced breakdown spectrometry and Total Reflection X-Ray Fluorescence
Grantee:Cassiana Seimi Nomura
Support type: Regular Research Grants
FAPESP's process: 19/08450-1 - Natural photoredox and photobioredox mediators
Grantee:Erick Leite Bastos
Support type: Regular Research Grants
FAPESP's process: 19/06391-8 - Photophysical characterization and anti-inflammatory potential of betalains
Grantee:Erick Leite Bastos
Support type: Regular Research Grants
FAPESP's process: 15/25629-4 - Synthesis of fluorescent nanoparticles using betalains
Grantee:Arthur Bonfá Fernandes
Support type: Scholarships in Brazil - Doctorate (Direct)