AgNO_(3)真空浸渍制备杀菌银缓释椰壳活性炭研究  

Bactericidal silver slow-release coconut shell activated carbon prepared by AgNO_(3) vacuum impregnation

作　　者：孔祥鑫 范金玥 张坤 黄举 黄晓丽[3] 李伟[1,2] 刘守新[1,2] KONG Xiangxin;FAN Jinyue;ZHANG Kun;HUANG Ju;HUANG Xiaoli;LI Wei;LIU Shouxin(Key Laboratory of Bio-Based Material Science&Technology of Ministry of Education,Northeast Forestry University,Harbin 150040,China;Engineering Research Center of Advanced Wooden Materials,Ministry of Education,Northeast Forestry University,Harbin 150040,China;Heilongjiang River Fishery Research Institute,Chinese Academy of Fishery Sciences,Harbin 150070,China)

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040 [2]东北林业大学木质新型材料教育部工程研究中心,哈尔滨150040 [3]中国水产科学研究院黑龙江水产研究所,哈尔滨150070

出　　处：《功能材料》2022年第12期12128-12132,12138,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(31971601)。

摘　　要：对椰壳活性炭在真空条件下浸渍硝酸银(AgNO_(3)),制备具有杀菌作用的银缓释椰壳活性炭(Ag/AC)。以大肠埃希杆菌(E.coli)为实验菌种考察Ag/AC的抑菌杀菌作用,采用扫描电子显微镜(SEM)、X射线衍射(XRD)、比表面积分析仪分别对Ag/AC表面形态、晶体结构、比表面积和孔结构进行分析。结果表明:银离子在AC表面被还原成粒径为200~800 nm的单质银;随着AgNO_(3)浸渍浓度的增加,银担载量上升、粒径增大,Ag/AC的比表面积、总孔容、平均孔径减小,杀菌性能与抗银流失性能提高。当AgNO_(3)溶液浸渍浓度为8.0 g·L^(-1)时,载银量最大(0.44%),杀菌性能最佳(99.26%);在水中振荡15 d,银流失率为30%,对比相同条件下常压浸渍得到Ag/AC银流失率为94.23%,真空浸渍制备的载银椰壳活性炭在保持高杀菌率的同时实现了银缓释。The coconut shell activated carbon was impregnated with silver nitrate(AgNO_(3))under vacuum conditions to prepare silver slow-release coconut shell activated carbon(Ag/AC)with sterilization effect.The bacteriostatic and bactericidal effect of Ag/AC was investigated by E.coli as an experimental strain.Scanning electron microscopy(SEM),X-ray diffraction(XRD),and specific surface area analyzer were used to characterize the surface morphology,crystal structure,specific surface area and pore structure of the Ag/AC samples.The results show that the silver ions are reduced to elemental silver with a particle size of 200-800 nm on the surface of AC.With the increase of AgNO_(3)impregnation concentration,the silver loading and particle size increased,and the BET surface area,total pore volume and average pore diameter of Ag/AC decreased,thus the bactericidal performance and anti silver loss performance improved.When the impregnation concentration of AgNO_(3)solution was 8.0 g/L,the silver loading was the largest(0.44%)and the bactericidal performance was the best(99.26%).After 15 days of oscillation in water,the silver loss rate was 30%.Compared with atmospheric pressure impregnation under the same conditions,the loss rate of Ag/AC silver was 94.23%.The silver-loaded coconut shell activated carbon prepared by vacuum impregnation achieved a controlled silver release while maintaining a high sterilization rate.

关 键 词：载银活性炭 真空浸渍法 杀菌 银缓释 

分 类 号：TQ424.1[化学工程]