【摘要】 采用溶胶-凝胶法,原位合成了铜改性的六方介孔硅(Cu-HMS)无机抗菌材料.XRD、TG-DTA、ESR、UV-Vis、FT-IR、ESEM、EDS及N2吸附脱附等对材料结构与性能进行了表征;以大肠杆菌、金黄色葡萄球菌、枯草杆菌及芽孢杆菌作供试菌种,考察了材料的抗菌性能.结果表明,材料粒子呈规则的叶片状,比表面积为553m2/g,平均孔径约3.6nm,铜以离子形式存在于材料的骨架结构中,材料具有良好的介孔结构和热稳定性,有优良的紫外-可见光吸收性能;在抗菌实验中,材料的抗菌效能较好,抗菌性能稳定持久.材料用量20mg/L,12h即表现出明显的抑菌作用;用量为200mg/L时,24h后可彻底杀灭大肠杆菌、金黄色葡萄球菌及枯草杆菌.更多还原

【Abstract】 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.更多还原