Autor(es)

Marques, Gleison N. ; Reis, Roberta Y. N. ; Ribeiro, Lara K. ; Simoes, Luiz G. P. ; Minozzi, Daniel T. ; Andres, Juan ; Assis, Marcelo ; Mascaro, Lucia H. ; Longo, Elson

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 11, n. 5, p. 8-pg., 2023-10-01.

Resumo

A bovine leather material functionalized with SiO2-Ag nanoparticles (NPs) composite, which possesses highly efficient antimicrobial activity against the SARS-CoV-2 virus and Staphylococcus aureus (S. aureus) bacteria, has been developed. The characterization of this material was conducted using scanning and transmission electron microscopy (SEM and TEM), energy dispersive X-ray spectrometry (EDS), atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), and x-ray photoelectron spectroscopy (XPS). The immobilization of SiO2-AgNPs within the collagen fibers of the leather resulted in surface modification, leading to an increase in material roughness (from 8.93 nm +/- 1.55-12.36 nm +/- 1.76 nm) and the contact angle (from 76 degrees to 81 degrees) of the SiO2-AgNPs coated leather. This functionalized leather exhibited an impressive efficacy of 99.93% against SARSCoV-2% and 99.99% against S. aureus, attributed to the oxidizing properties of the Ag NPs and the enhanced production of reactive oxygen species (ROS). These results highlight that the immobilization of SiO2-AgNPs on the surface of bovine leather is an simple, effective and low-cost strategy for obtaining new surfaces with high antimicrobial activity. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 21/06128-5 - Estudo da atividade antiviral contra SARS-CoV-2 de nanopartículas de cobre e óxido de cobre suportadas em kefiran
• Beneficiário: Gleison Neres Marques
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 21/11326-0 - Estudo de fotoeletrodos de cobre e óxido de cobre para tratamentos de águas residuais após a pandemia do COVID-19
• Beneficiário: Roberta Yonara Nascimento Reis
• Modalidade de apoio: Bolsas no Brasil - Doutorado