以硝酸银为原料,柠檬酸钠为表面修饰剂,抗坏血酸或硼氢化为还原剂,在室温下合成出了黄色、紫色和蓝色的3种纳米银胶。透射电子显微镜表征表明黄色纳米银胶中主要是形状不规则的纳米银颗粒;紫色纳米银胶中主要是小尺寸三角形纳米银片和纳米银颗粒;蓝色纳米银胶中主要是大尺寸的三角形纳米银片。采用大肠杆菌为抗菌对象,详细研究了3种纳米银胶对大肠杆菌的抗菌作用。结果表明:3种纳米银胶均具有良好的抗菌作用。其中,纳米银颗粒的抗菌作用最佳,其次是小尺寸纳米银片,大尺寸纳米银片的抗菌作用最弱。分析认为不同形貌纳米银抗菌作用与其活性和比表面积等有关。
Three kinds of silver colloids with colors of yellow,purple,and blue,respectively,were synthesized at room temperature with silver nitrate as raw material,sodium citrate as surface modifier,ascorbic acid or borohydride as reducing agent.Transmission electron microscopy (TEM) results demonstrated that there were irregular silver nanoparticles,small triangular silver nanoplates and nanoparticles,and large triangular silver nanoplates in the yellow,purple and blue silver colloids,respectively.In order to reveal the three kinds of silver colloids antibacterial substance,escherichia coli as antimicrobial object was used.The experimental results showed that three kinds of silver colloids had good antibacterial properties.Among them,the antibacterial property of silver nanoparticles was the best,followed by small silver nanoplates,and the antibacterial property of large silver nanoplates was the weakest.The antibacterial properties of silver nanostructures with different morphologies were related to the activity and specific surface area of silver nanostructures.
[1] Yin J,YangY,Hu Z,et al.Attachment of silver nanoparticles(AgNPs) onto thin film composite (TFC) membranes through covalent bonding to reduce membrane biofouling[J].Journal of Membrane Science,2013,441(16):73-82.
[2] Tobaldi D M,Piccirillo C,Pullar R C,et al.Silver-modified nano-titania as an antibacterial agent and photocatalyst[J].Journal of Physical Chemistry C,2014,118(9):751-4766.
[3] 曹雪玲,陆书来,张东杰,等.纳米银作为抗菌剂的抗菌性能研究[J].吉林化工学院学报,2014,34(11):30-34.
[4] Lu W,Wao K,Wang J,et al.Ionic liquids-water interfacial preparation of triangular Ag nanoplates and their shape-depend-entantibacterialactivity[J].Journal of Colloid and Interface Science,2015,437:35-41.
[5] Zapata P A,Larrea M,Tamayo L,et al.Polyethylene/silver-nanofiber composites:a material for antibacterial films[J].Mat Sci Eng C,2016,69:1282-1289.
[6] Ma P,Jiang L,Yu M,et al.Green antibacterial nanocomposites from poly(lactide)/poly(butylene dipateco-terephthalate)/Nanocrystal cellulose-silver nanohybrids[J].ACS Sustainable Chem Eng,2016,4(12):6417-6426.
[7] Amritpal K,Simran P,Vivek K,et al.Synergetic effect of vancomycin loaded silver nanoparticles for enhanced antibacterial activity[J].Colloids and Surfaces B,Biointerfaces,2018,176:62-69.
[8] Tominaga C,Shitomi K,Miyaji H,et al.Antibacterial photocurable acrylic resin coating using a conjugate between silver nanoclusters and alkyl quaternary ammonium[J].ACS Applied Nano Materials,2018,1(9):4809-4818.
[9] Qu Z C,Zhang Y,Liu S W.Preparation and antibacterial properties of silver nanoparticles[C].Shenzhen,China:Proceedings of the 2017 2nd International Conference on Advances in Materials Mechatronics and Civil Engineering (ICAMMCE 2017),2017.
[10] Zhang W L,Zhao X J,Jiang,Y Y,et al.Citrus pectin derived silver nanoparticles and their antibacterial activity[J].Inorganic and Nano-Metal Chemistry,2017,47(1):15-20.
[11] 赖文忠,赵威,杨容,等.用双还原法制备三角形银纳米片及其光学性能[J].物理化学学报,2010,26(4):1177-1183.
基金资助
国家自然科学基金(61671140);中山市科技计划项目(2018SYF10)
PDF
(3931KB)
