【摘要】 通过吸附制备载Ag多孔SiO2,用XRD和最小抑菌浓度(MIC)对样品进行表征,研究反应条件对银吸附量的影响及焙烧温度对抗菌性能的影响。结果表明,溶液pH和Ag+浓度是影响多孔SiO2银吸附量的重要因素。随pH增加,吸附量先增加后减少,并在pH=10时达到最大值。随Ag+浓度增加,吸附量不断增加并在Ag+浓度为5.5mg/mL时开始保持不变,而吸附效率不断降低。反应时间和温度对多孔SiO2吸附银没有影响。随焙烧温度升高,载银多孔SiO2抗菌性能逐渐降低。更多还原

【Abstract】 An Ag-carried porous silica is prepared with absorption method and is characterized by XRD and minimalinhbitory concentration(MIC).The effects of reaction conditions on silver absorption and the influence of sintering temperature on antibacterial performance are investigated.It is found that pH and Ag~+ content in solution are important factors impacted on the silver absorption.The absorption quantity of silver on the porous silica is increased firstly and then decreased with the increase of solution pH,and the maximum is achieved at pH=10.The absorption quantity of silver on the porous silica is continuously increased with the increase of Ag~+ content in solution until it keeps constant at higher than 5.5mg/mL Ag~+ concentration,however the adsorption efficiency is gradually reduced.The effects of retention time and reaction temperature on silver absorption are neglectable.The antibacterial performance of the Ag-carried porous silica is progressively decreased with the increase of the sintering temperature.更多还原