Characterization and Antibacterial Ability of Copper-Modified Hexagonal Mesoporous Silica in situ

Copper-modified hexagonal mesoporous silica (Cu-HMS) was in situ prepared with sol-gel method. The structure and the performance of Cu-HMS were characterized by XRD,TG-DTA,ESR,UV-Vis,FT-IR,ESEM,EDS and N2 adsorption-desorption isotherms. Based on bacteriostasis experiments of E. coil,S. aureus,B. subtilis and G. bacillus,the antibacterial ability of the sample was also investigated. The results show that the particles of Cu-HMS look like regular thallus,the specific surface area is 533m2/g,the average pore size is 3.6nm,and the copper ions are presented in framework of the sample,especially. The sample has favorable mesoporous structure,thermal stability and ultraviolet-visible-light absorption ability. Furthermore,The bacteriostasis experimental results show that Cu-HMS has favourable and steady antibacterial ability. When the dosage of Cu-HMS is 20mg/L,the bacteriostasis ability may be visibly detected in 12h,while the dosage is up to 200mg/L,E. coil,S. aureus and B. subtilis may be killed after 24h.