In this study, we have successfully prepared an ionic silver(Ag+) uniformly incorporated into amorphous silica/aluminum framework and silver nanoparticles was embedded on its surface by sol-gel process, which introduce controlled Al atoms to play a significant role in overall Silica matrix. It attributed that the premier reason for silver ions uniformly distribute in entity of silica carrier. The interaction between [AlO4]- tetrahedral structure and Ag+ result in uniform Ag +distribution in matrix by electrostatic force, and then Ag+ embedded Al-O-Si structure is revealed. The Ag + embedded Al-O-Si structure was then annealed in O2 atmosphere range from the temperature 250◦C to 1000◦C. The surface composition ratio of silver atoms and monovalent silver ions were changed with annealed condition constantly, which could divide into the three
steps transition. Silver nanoparticles reduced on the surface at lower temperature initially. As temperature gradually increased, silver atoms immediately fulfilled ionization requirement with transforming to the ionic state. Furthermore, it might take place melting and desquamation at
higher temperature. The sample A before annealing at 30◦C emerges the most desirable property as an antibacterial material. The advantages possess chemical durability, high standard antibacterial ability and colorless appearance. Thought the samples after annealing do not include appealing color, the evolution of silver thermal stability are eventually found out. These consequences present prospective development in biomaterial.
