Ionic liquid-mediated: Enhanced surface morphology of silver/manganese oxide/bentonite nanocomposite for improved biological activities

This work mainly focused on the relationship of microstructures, mesoporosity, and antibacterial properties of the silver/manganese oxide/bentonite (Ag/Mn3O4/bent) nanocomposite with and without ionic liquid by thermal decomposition method. At room temperature aliphatic N-trimethyl-N-propylammonium bis(trifluoromethanesulfonyl)imide ionic liquid was used as the capping agent for the synthesis of nanoparticles. The structural, morphological, elemental compositions and optical properties of pure nanocomposites were studied by using XRD, XPS, BET, SEM, TEM with SAED, EDX, Fr-IR, and UV-DRS techniques. X-ray diffraction result analyzed the formation of semi-crystalline nature of the nanocomposites. The band gap values of nanocomposites are smaller than that of corresponding bulk materials due to the quantum size effect was estimated from the optical study. SEM and TEM images showed the well-defined quasi-spherical shape on nanorod-like structures covered into the interlayer and the surface of the bentonite clay. Their specific surface area, pore volume, and size were determined by BET method to be ca. 90 m(2) g(-1), two times higher than the pristine Na-bent. In vitro drug release sketch, antibacterial and cytocompatibility activities of the synthesized nanocomposites were also investigated. The synthesized nanocomposites were studied against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The cytotoxicity effects of the nanocomposites were examined in human embryonic kidney (HEK 293) cell line. Both results showed that Ag/Mn3O4/bent/IL nanocomposite enhanced the antibacterial and biocompatibility activity of bulk materials. (C) 2017 Elsevier B.V. All rights reserved.