Produção Nacional
Revisado por pares
Zn(II) loaded silylated bentonites as antibacterial materials: Influence of the surface functionalization
2024; Elsevier BV; Volume: 659; Linguagem: Inglês
10.1016/j.apsusc.2024.159878
ISSN1873-5584
AutoresAdriana Nunes dos Santos, Denise B. França, Luís H. de Oliveira, Idglan S. de Lima, Josy A. Osajima, Edson C. Silva-Filho, Baptiste Rigout, Maguy Jaber, Maria G. Fonseca,
Tópico(s)Adsorption and biosorption for pollutant removal
ResumoAntimicrobial materials based on metal cations loaded on solids have been widely investigated against different bacteria. In this study, sodium bentonite was silylated in the presence of different organosilanes containing one, two or three nitrogen atoms. Reactions were performed, free of solvent, under microwave irradiation at 50 °C and 5 min. Raw and silylated solids were loaded with Zn(II) cations, and their antibacterial activities against Staphylococcus aureus and Escherichia coli were evaluated. The obtained silylated samples were characterized using X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), 13C and 29Si nuclear magnetic resonance (NMR), zeta potential measurements, CHN elemental analysis, scanning electron microscopy (SEM), transmission electron microscopy, and thermogravimetric analysis. Silanes were successfully covalently bonded to the silanols of the clay mineral and intercalated, resulting in an increase in the basal space. Antibacterial testing of the Zn2+ loaded solids revealed a maximum inhibition of up to 88 % and 62 % of both the bacteria Staphylococcus aureus and Escherichia coli.
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