These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
Recoverable Microparticle-Supported Metal Nanocatalysts
preprintsubmitted on 26.11.2019, 10:58 and posted on 02.12.2019, 07:46 by Arthur Bonfá Fernandes, Mariia V. Pavliuk, Cristina Paun, Alexandrina C. Carvalho, Cassiana S. Nomura, Erik Lewin, Rebecka Lindblad, Pedro H. C. Camargo, Jacinto Sa, Erick Leite Bastos
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 polymer microbead-supported metal and metal oxide nanoparticles and their application as recoverable nanocatalysts for reactions under batch and flow conditions. Au, Ag and Fe3O4 nanoparticles were prepared directly at the surface of benzylamine-coated spherical polymer beads in water by using low energy microwave radiation. The morphology and size of the nanoparticles, and therefore their catalytic properties, were tuned by modifying the bead surface using betalamic acid, an antioxidant from plant origin. The catalytic performance and recovery of these environmentally friendly nanocatalysts was demonstrated towards model redox chemical transformations. We anticipate the results reported herein can provide important insights into the controlled and facile synthesis of microparticle supported nanocatalysts under mild conditions.