Controlled synthesis and enhanced bacteriostatic activity of Mg(OH)(2)/Ag nanocomposite

摘要

Silver nanoparticles have good sterilization performance due to their small size and large specific surface area, while the small size also brings about reunification and reduces the sterilization activity. To resolve the problem, magnesium hydroxide [Mg(OH)(2)] microsphere was designed as a supported material to load silver particles on its surface. Mg(OH)(2) microspheres were successfully synthesized under the control of a biotemplate of eggshell membrane. X-ray diffraction, thermal gravimetric analysis/differential scanning calorimetry, and transmission electron microscopy were performed to characterize the Mg(OH)(2) microspheres. The results indicate that the Mg(OH)(2) microspheres of average size similar to 2 mu m were formed from nanoflakes. The silver nanoparticles were loaded on the surface of Mg(OH)(2) microspheres to form Mg(OH)(2)/Ag nanocomposite, which exhibited enhanced antibacterial effect compared to that of silver nanoparticles. The enhanced antibacterial mechanism was investigated in detail.