The silver-loaded diatomite prepared by ion exchange and its antibacterial effect

摘要

In order to optimize the preparation process of silver-loaded diatomite, the effect of the adsorption time, temperature and the concentration of silver nitrate on the content of silver ions in diatomite were investigated through ion exchange experiment method. And the antibacterial properties were measured by Haloes method. The samples were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The results show that the loading of the silver ions is no change in the microscopic structure of the diatomite, the silver exists in diatomite as the ion. The content of silver in the diatomite is 0.523g/g under the condition of AgNO_3 (0.5mol/L) and temperature 70°C. The silver-loaded diatomite has good antibacterial activity on E. coli.