首先通过共沉淀法制备酒石酸钠(ST)稳定的Fe3O4(四氧化三铁)纳米粒子(简称Fe3O4@ST),其次以酒石酸钠为双功能还原剂利用种子生长法获得Fe3O4@ST@Ag磁性复合纳米粒子。考察了不同反应体系、反应时间、Fe3O4@ST含量等因素对合成Fe3O4@ST@Ag复合纳米粒子的影响,通过紫外-可见分光光度计(UV-2450)、场发射扫描电子显微镜(SEM)以及动态光散射仪(DLS)等仪器对Fe3O4@ST和Fe3O4@ST@Ag复合纳米粒子进行系统表征。结果表明:最优条件下获得的Fe3O4@ST@Ag复合纳米粒子呈球状结构,平均粒径为31nm左右并在372nm处明显出现强而窄的Ag纳米粒子表面等离子体特征吸收峰。此外,Zeta电位结果显示Fe3O4@ST@Ag复合纳米粒子表面带有大量负电荷,归因于酒石酸钠分子中含有大量的羧基,说明其兼有稳定剂和还原剂的功能。
Firstly,sodium tartrate(ST) used as a mild stabilizer to synthesis the well-dispersed Fe3O4 magnetic nanoparticles (Fe3O4@ST) in water by simple modified coprecipitation method.Secondly,sodium tartrate acted as a difunctional reducing agent to prepare Fe3O4@ST@Ag nanocomposites by using simple reflux method.The effects of different reaction systems,reaction time and the content of Fe3O4@ST on the synthesis of Fe3O4@ST@Ag nanocomposites were discussed.The synthesis of Fe3O4@ST and Fe3O4@ST@Ag nanoparticles was characterized by ultraviolet-visible spectrophotometer (UV-2450),field emission scanning electron microscopy (SEM) and dynamic light scatter (DLS).The results showed the obtained Fe3O4@ST@Ag nanoparticles under the optimal conditions exhibited a spherical structure with an average particle size about 31nm,and appeared a strong and narrow Ag nanoparticles plasma characteristic absorption peak at 372nm.In addition,zeta potential results showed the surface of Fe3O4@ST@Ag had plenty of negative charges,due to numerous carboxyl groups of ST molecule which not only possessed reduction but also as stabilization functions.
[1] Wang C W, Li M, Li Q J, et al.Polyethyleneimine-mediated seed growth approach for synthesis of silver-shell silica-core nanocomposites and their application as a versatile SERS platform[J].RSC Advances, 2017, 7:13138.
[2] Senapati S, Srivastava S K, Singh S B, et al.Magnetic Ni/Ag core-shell nanostructure from prickly Ni nanowire precursor and its catalytic and antibacterial activity[J].Journal of Materials Chemistry, 2012, 22(14):157-168.
[3] Du L, Guo A, Cai A.Polydopamine-functionalized grapheme Fe3O4-Ag magnetic composites with high catalytic activity and antibacterial capability[J].Micro Nano Lett, 2018, 4:518-523.
[4] 文杰斌.银纳米粒子的制备、表征及其抗菌性能[D].长沙:中南大学, 2013.
[5] 张火利, 王敏, 刘肖杰.超声波辅助Ag纳米粒子的制备及其表征[J].功能材料, 2016, 47(B06):214-216.
[6] 陈延明, 贾宏伟.ZnO/Ag复合纳米粒子的制备与表征[J].化学研究与应用, 2014(12):1893-1897.
[7] 姬振行.壳聚糖/银纳米微球的制备与表征[D].天津:河北科技大学, 2010.
[8] 龙星宇, 吴迪, 龚小见.功能化有机聚合物磁球对金属离子磁固相萃取的研究进展[J].化工新型材料, 2018, 46(10):49-52.
[9] 赵春雷, 赵悦, 王锐.水溶液中双酚A吸附材料的研究新进展[J].化工新型材料, 2018, 46(9):233-237.
[10] Xing Y, Gao Q, Zhang Y M, et al.The improved sensitive detection of C-reactive protein based on the chemiluminescence immunoassay by employing monodispersed PAA-Au/Fe3O4 nanoparticles and zwitterionic glycerophosphoryl choline[J].Journal of Materials Chemistry B, 2017, 21:3919-3926.
[11] Xing Y, Jin Y Y.Si J C, et al.Controllable synthesis and characterization of Fe3O4/Au composite nanoparticles[J].Journal of Magnetism and Magnetic Materials, 2015, 380:150-156.
[12] Gao Q, Xing Y, Peng M L, et al.Enhancement of Fe3O4/Au composite nanoparticles catalyst in oxidative degradation of methyl orange based on synergistic effect[J].Chinese Journal of Chemistry, 2017, 35(9):1431-1436.
[13] Dong Y, Yang Z, Sheng Q, et al.Solvothermal synthesis of Ag@Fe3O4 nanosphere and its application as hydrazine sensor[J].Colloids & Surfaces A Physicochemical & Engineering Aspects, 2018, 538:371-377.
[14] 刘晨辉, 朱玲, 沈玉华, 等.Fe3O4@SiO2@Ag纳米复合物的制备及其对RhB的痕量检测[J].安庆师范学院学报(自然科学版), 2016, 22(1):92-97.
[15] Liu Y, Zhang Y Y, Kou Q W, et al.Eco-friendly seeded Fe3O4-Ag nanocrystals:a new type of highly efficient and low cost catalyst for methylene blue reduction[J].RSC Advances, 2018, 8:2209.
[16] Xing Y, Ma F F, Peng M L, et al.Bifunctional sodium tartrate as stabilizer and reductant for the facile synthesis of Fe3O4/Ag nanocomposites with catalytic activity[J].Journal of Magnetism and Magnetic Materials, 2019, 471:133-141.
[17] 龙世佳, 刘妍, 董小宁.银纳米粒子的制备、表征及抗菌性能研究[J].甘肃高师学报, 2017, 22(6):20-24.
[18] Xiong R, Lu C, Wang Y, et al.Nanofibrillated cellulose as the support and reductant for the facile synthesis of Fe3O4/Ag nanocomposites with catalytic and antibacterial activity[J].Journal of Materials Chemistry A, 2013, 1(47):14910.
[19] 邢艳, 呼国茂, 骆志义.酒石酸钠绿色还原法制备Ag纳米粒子的研究[J].榆林学院学报, 2017, 27(2):35-38.
[20] Wang H, Shen J, Cao G, et al.Multifunctional PEG encapsulated Fe3O4@silver hybrid nanoparticles:antibacterial activity, cell imaging and combined photothermo/chemo-therapy[J].Journal of Materials Chemistry B, 2013, 1(45):6225.