Fernandes, Arthur B.
Pavliuk, V, Mariia
Carvalho, Alexandrina C.
Nomura, Cassiana S.
Camargo, Pedro H. C.
Bastos, Erick L.
Total Authors: 10
 Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP - Brazil
 Pavliuk, Mariia, V, Uppsala Univ, Dept Chem, Phys Chem Div, Angstrom Lab, S-75120 Uppsala - Sweden
 Uppsala Univ, Dept Chem, Inorgan Chem Div, Angstrom Lab, S-75120 Uppsala - Sweden
 Univ Helsinki, Dept Chem, FI-00014 Helsinki - Finland
ACS APPLIED NANO MATERIALS;
Web of Science Citations:
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)