Bioactive Ag<sub>3</sub>PO<sub>4</sub>/Polypropylene Composites for Inactivation of SARS-CoV-2 and Other Important Public Health Pathogens
Lara Kelly Ribeiro, Marcelo Assis, Laís R. Lima, Dyovani Coelho, Mariana Ottaiano Gonçalves, Robert Paiva, Leonardo Nazário de Moraes, Lauana Fogaça de Almeida, Felipe Lipsky, Miguel A. San‐Miguel, Lúcia H. Mascaro, Rejane Maria Tommasini Grotto, Cristina Paiva de Sousa, Ieda L. V. Rosa, Sandra Andréa Cruz, Juán Andrés, E. Longo
Abstract
The current unprecedented coronavirus pandemic (COVID-19) is increasingly demanding advanced materials and new technologies to protect us and inactivate SARS-CoV-2. In this research work, we report the manufacture of Ag3PO4 (AP)/polypropylene (PP) composites using a simple method and also reveal their long-term anti-SARS-CoV-2 activity. This composite shows superior antibacterial (against Staphylococcus aureus and Escherichia coli) and antifungal activity (against Candida albicans), thus having potential for a variety of technological applications. The as-manufactured materials were characterized by XRD, Raman spectroscopy, FTIR spectroscopy, AFM, UV–vis spectroscopy, rheology, SEM, and contact angle to confirm their structural integrity. Based on the results of first-principles calculations at the density functional level, a plausible reaction mechanism for the initial events associated with the generation of both hydroxyl radical •OH and superoxide radical anion •O2– in the most reactive (110) surface of AP was proposed. AP/PP composites proved to be an attractive avenue to provide human beings with a broad spectrum of biocide activity.