Eco-friendly synthesis and assessment of the antimicrobial effectiveness of hydrotalcite-silver hybrid material

In this study, Mg-Al hydrotalcite has been successfully synthesized using the co-precipitation method. Silver nanoparticles were adsorbed successfully onto HT. Factors such as extraction solvent, extract concentration, ratio of HT/AgNO3 ratio all affect the adsorption process of silver nanoparticles on HT ability to put nano silver on HT. Suitable conditions the synthesis offor making HT-Ag hybrid materials using guava leaf extract as a reducing agent/reductant include: guava leaf extract in ethanol solvent, the volume of extract used is 5 ml/0.05 g AgNO3. Spherical silver nanoparticles, in sizes of 10-30 nm, are adsorbed on the surface of HT. The X-ray diffraction graph of HT-Ag material determined the crystal structure of silver nanoparticles. HT-Ag’s antimicrobial effect against E.coli and S.aureus can be assessed. Material that was synthesised using the HT/AgNO3 ratio of 10/1, has highly efficient antimicrobial activity against the two bacteria strains mentioned above. When physically impacted (by ultrasonic vibrations), silver nanoparticles were released from HT-Ag material into the solvent, significantly enhancing the material’s antimicrobial effectiveness. The diameter of the zones of inhibition for E.coli and S.aureus bacteria increased by 1.33 to 1.57 fold. This result opened up the prospect of using the hybrid material HT-Ag as an antimicrobial additive.