关键词:

HMS, 改性, 表征, 抗菌性能

Abstract:

Silver-modified hexagonal mesoporous silica (Ag-HMS) was in situ synthesized with the sol-gel method and by using ［Ag(NH₃)₂］⁺ as the silver source.The structure and properties were characterized by XRD, FT-IR, TG-DTA, UV-Vis, ESEM, EDS and N₂ adsorption/desorption, and the antibacterial ability was investigated.The results indicated that Ag-HMS had favorable mesoporous structure, thermal stability and absorption ability of ultraviolet radiation, the silver species were evenly distributed in the material and existed in the form of framework/non-framework.As compared with HMS, Ag-HMS changed significantly in terms of demoulding thermochemical process, pore volume, mesoporous degree of orderliness, specific surface area, and particle shape.The results of antibacterial experiments showed that Ag-HMS had strong inhibition on B.subtilis, E.coil, G.bacillus and S.aureus.Especially for B.subtilis and E.coil,at the dose of Ag-HMS up to 1.00 mg·L^-1, these two bacteria were entirely killed after incubation for 12 h.

Key words:

HMS, 改性, 表征, 抗菌性能