3D石墨烯增效的磁性功能材料的制备及其吸附性能研究  

Preparation and adsorption properties of 3D graphene synergistic magnetic functional materials

作　　者：朱晨 刘敏 李小燕 刘莉 王芳 ZHU Chen;LIU Min;LI Xiaoyan;LIU Li;WANG Fang(Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,School of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning 530008,China;Guangxi Key Laboratory of Utilization of Microbial and Botanical Resources,School of Marine Sciences and Biotechnology,Guangxi University for Nationalities,Nanning 530008,China)

机构地区：[1]广西民族大学化学化工学院广西高校食品安全与药物分析化学重点实验室广西林产化学与工程重点实验室,南宁530008 [2]广西民族大学海洋与生物技术学院广西高校微生物与植物资源利用重点实验室,南宁530008

出　　处：《功能材料》2019年第5期5175-5184,共10页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21545011;21165003);广西自然科学基金资助项目(2016GXNSFAA380141);广西科技基地和人才专项资助项目(桂科AD18126005);广西高校中青年教师基础能力提升资助项目(2018KY0169);广西民族大学--2017年研究生科研创新重点资助项目(gxun-chxzs2017126);广西民族大学科研基金资助项目(2017MDQN002)

摘　　要：用共沉淀法制备Fe_3O_4纳米粒子,将3D石墨烯包裹在Fe_3O_4纳米粒子表面,先后分别用正硅酸乙酯(TEOS)和乙烯基三甲氧基硅烷(VTMO)对其表面进行乙烯基硅烷化改性,最后通过"巯基-烯"点击化学将功能单体3-巯基-1-丙磺酸钠(MPS)聚合在粒子表面制备了一种磁性功能材料Fe_3O_4@3DG@VTMO@MPS。分别采用扫描电镜(SEM)、能谱分析(EDS)、粒径分析(DLS)、红外光谱(FT-IR)及热重分析(TGA)对功能材料的结构、形貌及热稳定性等进行表征,再通过静态吸附实验研究了此功能材料对溶菌酶的吸附性能。结果表明,制备的磁性功能材料具有较高的吸附性能(最大吸附量达162.1 mg/g)和较快的吸附动力学(150 min可达吸附平衡)。拟二级动力学模型适用于描述功能材料对溶菌酶的吸附动力学行为,且功能材料对溶菌酶的吸附过程更符合Langmuir吸附模型,表明功能材料对溶菌酶的吸附为单分子层吸附。以Fe_3O_4@3DG@VTMO@MPS作为固相萃取材料,分离富集蜂蜜中的溶菌酶,并结合高效液相色谱对实际样品进行检测。Fe 3O 4 nanoparticles were synthesized by co-precipitation method. 3D graphene was modified on the surface of Fe 3O 4 nanoparticles,and then covered with tetraethyl orthosilicate(TEOS) and vinyltrimethoxysilane(VTMO). Finally,the magnetic functional material Fe 3O 4@3DG@VTMO@MPS was synthesized by the polymerization of functional monomer 3-mercapto-1-propanesulfonate(MPS) on the surface using “thiol-ene” click chemistry. The structure,morphology and thermal stability of the functional materials were characterized by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),dynamic light scattering(DLS),Fourier transform infrared spectroscopy(FI-IR) and thermogravimetric analysis(TGA),respectively. The adsorption properties of this functional material for Lysozyme were studied by static adsorption experiments. The results show that the magnetic functional materials had nice adsorption capacity(the maximum adsorption capacity was 162.1 mg/g) and fast adsorption kinetics(the adsorption equilibrium could be reached in 150 min). The pseudo-second-order kinetic model was suitable for describing the adsorption kinetics of lysozyme on functional materials,and the adsorption process of functional materials on lysozyme was more in line with Langmuir adsorption model,indicating that adsorption is monolayer adsorption. Fe 3O 4@3DG@VTMO@MPS as solid phase extraction materials as solid phase extraction materials could be used for separation and enrichment of lysozyme,then combined with high performance liquid chromatography(HPLC) to detect honey in actual samples.

关 键 词：3D石墨烯 磁性功能材料 溶菌酶 吸附 

分 类 号：O657.72[理学—分析化学]