Silver, copper, and copper hydroxy salt decorated fumed silica hybrid composites as antibacterial agents.

Silver, copper, and copper hydroxy salt decorated fumed silica hybrid composites as antibacterial agents. Colloids Surf B Biointerfaces. 2020 Jul 03;195:111216 Authors: Videira-Quintela D, Guillén F, Montalvo G, Martin O Abstract Decoration of matrices such as silicates, graphene, etc. is an efficient technique in order to develop multifunctional materials with enhanced properties, which are of use for microbial control. Consequently, it leads to an increased search for alternative matrices and synthesis methods for decoration. Herein, decoration of a fumed silica is proposed, with structures that consisted of silver (Ag@FS), copper hydroxy salt (CuHS@FS), and copper (Cu@FS), for antibacterial applications. With the simple combination of the metal precursor salt, the appropriate solvent, and the fumed silica, the composites were obtained by one-pot solvothermal (200 °C for 1 h), rapid (2 min) microwave assisted precipitation, and by ascorbic acid chemical reduction, respectively. Characterization by powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FE-SEM) proved the successful decoration of the fumed silica with layered copper hydroxy salt (90 width x 970 length nm) and round-like metallic Ag (210 nm) and Cu (370 nm) particles. Fourier transformed infrared (FTIR) and Raman spectroscopy evidenced the presence of SiOMetal interactions. The antibacterial activ...
Source: Colloids and Surfaces - Category: Biotechnology Authors: Tags: Colloids Surf B Biointerfaces Source Type: research