化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (9) : 196-201. DOI: 10.19817/j.cnki.issn 1006-3536.2020.09.043

科学研究

Fe₃O₄@SiO₂@EDTA磁性复合微球的制备及吸附性能研究

张春晓, 张腾, 秦泗超, 马艳梅

作者信息 +

Preparation and adsorption property of Fe₃O₄@SiO₂@EDTA magnetic composite microsphere

Zhang Chunxiao, Zhang Teng, Qin Sichao, Ma Yanmei

Author information +

文章历史 +

Received		Published
2019-06-08		2020-09-20
Issue Date	Revised Date
2020-10-20	2019-06-08

PDF

摘要

以FeCl₂·4H₂O和FeCl₃·6H₂O为原料,采用化学共沉淀法制备了Fe₃O₄磁性纳米粒子;然后采用Stber法,利用正硅酸乙酯的水解和缩聚反应成功制备出Fe₃O₄@SiO₂复合粒子;最后利用氨基与羧基的缩聚反应在颗粒表面结合上螯合剂乙二胺四乙酸二钠(EDTA),成功制备出Fe₃O₄@SiO₂@EDTA磁性复合微球。利用红外光谱、热重、纳米粒度仪、扫描电镜和透射电镜等手段对复合微球进行表征,并研究了磁性复合微球对Cr⁶⁺、Mn⁷⁺重金属离子的吸附效果。结果表明:Fe₃O₄@SiO₂@EDTA磁性复合微球对Mn⁷⁺的平衡吸附量达到11.85mg/g左右,对Cr⁶⁺的平衡吸附量达到8.0mg/g左右。可以有效地去除水溶液中的重金属离子,而且可以磁分离。同时吸附动力学模型符合准二级动力学模型;吸附等温模型符合Langmuir吸附模型。

Abstract

Fe₃O₄ magnetic nanoparticles were prepared by chemical coprecipitation method using FeCl₂·4H₂O and FeCl₃·6H₂O as raw materials.Fe₃O₄@SiO₂ composite particles were successfully prepared by hydrolysis and polycondensation of tetraethyl orthosilicat using Stöber method.Finally,the chelating agent EDTA was bonded to the surface of the particles by the polycondensation reaction of amino group and carboxyl group.Fe₃O₄@SiO₂@EDTA magnetic composite microspheres were characterized by IR,TG,LPSA and SEM.The adsorption properties of the microspheres were studied.The results shown that the equilibrium adsorption capacity of Fe₃O₄@SiO₂@EDTA to Mn⁷⁺ reached 11.85mg/g.The equilibrium adsorption amount to Cr⁶⁺ reached 8.0mg/g.The heavy metal ions in the aqueous solution can be effectively removed,and can be separated magnetically.At the same time,the adsorption kinetic model showed that it accorded with the quasi-secondary kinetic model,and the adsorption isotherm model accorded with the Langmuir adsorption model.

关键词

磁性纳米粒子 / 包覆 / 螯合 / 重金属吸附

Key words

magnetic nanoparticle / coating / chelation / adsorption of heavy metal ion

引用本文

引用格式 ▾

Fe₃O₄@SiO₂@EDTA磁性复合微球的制备及吸附性能研究[J]. 化工新型材料, 2020, 48(9): 196-201 DOI:10.19817/j.cnki.issn 1006-3536.2020.09.043

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] Cannas C,Urdu A,Peddis D,et al.Surfactant-assisted route to fabricate CoFe₂O₄ individual nanoparticles and spherical assembiles[J].Journal of Colloid and Interface Science,2010,343(2):415-422.
[2] Bourlinos A B,Bakandritsos A,Georgalilas V,et al.Surface modification of ultrafine magnetic iron oxide particles[J].Chem Mater,2002,4(14):3226-3228.
[3] Liu Q,Xu Z.Self-assembled monolayer coatings on nanosized magnetic particles using 6-mercaptohexadexanoic acid[J].Langmuir,1995,11(12):4617-4622.
[4] Tie S L,Lee H C,Bae Y S,et al.Monodisperse Fe₃O₄/Fe@SiO₂ core/shell nanoparticles with enhanced magnetic property[J].Colloids and Surfaces A:Physicochem Eng Aspeces,2007,293(1-3):278-285.
[5] Wang Y,Teng X,Wang J S,et al.Solvent-free atom transfer radical polymerization in the synthesis of Fe₂O₃ polystyrenecore-shell nanoparticles[J].Nano Lett,2003,3(6):789-793.
[6] Tan Lisha,Sun Mingyang,Hu Yunjun.et al.preparation of functionalized Fe₃O₄ nanoparticles and removal of heavy metal in water[J].Progress in Chemistry,2013,25(12):2148-2155.
[7] Wang J H,Zheng S R,Shao Y,et al.Amino-functionalized Fe₃O₄@SiO₂ core-shell magnetic nanomaterial as a novel adsorbent for aqueous heavy metals removal[J].Journal of Colloid & Interface Science,2010,349(1):393-399.
[8] Cui S,Shen X D,Len B L.Surface organic modification of Fe₃O₄ nanoparticles by silane-coupling agents[J].Rare Metals,2006,25(6):426-430.
[9] Yen S P S,Rembaum A,Landel R F.Functional magnetic microspheres:US4285819[P].1981-08-25.
[10] Tai Yulei,Wang Li,Dao Jingmin,et al.Synthesis of Fe₃O₄@poly (methylmethacrylate-co-divinylbenzene) magnetic porous microspheres and their application in the separation of phenolfrom aqueous solutions[J].Journal of Colloid and Interface Science,2011,360(2):731-738.
[11] 宋振岚.免疫磁珠与激活的单核一巨噬细胞对白血病细胞体外净化作用的研究[J].中华血液学杂志,1996,20(6):320-321.
[12] Odabasi M,Denizli A.Cibacron blue F3GA-attached magnetic poly(2-hydroxyethyl methacrylate) beads for human serum albumin adsorption[J].Polymer International,2004,53(3):332-338.
[13] Gong J L,Wang B,Zeng G M,et al.Removal of cationic dyes from aqueous solution using magnetic multi-wall carbon nanotube nanocomposite as adsorbent[J].Journal of Hazardous Materials,2009,164(2/3):1517-1522.
[14] Yener J,Kopac T,Dogu G,et al.Dynamic analysis of sorption of methylene blue dye on granular and powdered activated carbon[J].Chemical Engineering Journal,2008,144(3):400-406.
[15] Farzad Z,Elham I.Polyvinyl amine coated Fe₃O₄@SiO₂ magnetic microspheres for knoevenagel condensation[J].Chinese Journal of Cataiysis,2014,35(1):21-27.