Antibacterial actions of silver nanoparticles incorporated Zn–Al layered double hydroxide and its spinel

Simple processes to produce silver nanoparticles deposited layered double hydroxide (LDH) and its spinels are reported. Pristine layered double hydroxide (LDH) and Ag-layered double hydroxide (LDH) composite are synthesized through co-precipitation followed by ageing at 150 °C. The aforementioned composite was calcined at 800 °C to produce the corresponding spinel combined with Ag2O. Both of the composite and the calcined product are found to be showing antibacterial activity but sporulation in the fungal activity. The zone diameters of Ag-layered double hydroxide (LDH) composite are 5 mm and 6 mm for Escherichia coli and Staphylococcus aureus whereas the same for calcined Ag-layered double hydroxide (LDH) are 15 mm and 18 mm for the same bacteria showing stronger antibacterial activity of the calcined product over the composite itself. This result may lead to its application in ceramic industries.