Fe3O4@polydopamine and derived Fe3O4@carbon core-shell nanoparticles: Comparison in adsorption for cationic and anionic dyes

被引：51
作者：
Zhou, Ziwei
Liu, Rui [1 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2017年 / 522卷
关键词：
Polydopamine; Carbon; Magnetic; Organic dye; Adsorption; MULTIWALLED CARBON NANOTUBES; POLYDOPAMINE MICROSPHERES; WATER-TREATMENT; REMOVAL; ADSORBENT; EXTRACTION; POLLUTANTS; KINETICS; SEAWATER; RELEASE;
D O I：
10.1016/j.colsurfa.2017.02.063
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Magnetic core-shell structured nanoparticles (NPs) have recently attracted great attention as adsorbents because of their excellent adsorption property and easy separation. In this work, Fe3O4@polydopamine core-shell NPs are synthesized by coating a layer of polydopamine (PDA) onto the surface of magnetic Fe3O4 NPs and Fe3O4@carbon NPs are obtained after carbonization of Fe3O4@PDA. Both core-shell NPs are tested as magnetic adsorbents for cationic and anionic dyes. The results show that Fe3O4@PDA NPs have good adsorption property toward methylene blue while Fe3O4@C NPs exhibit excellent performance for methyl orange adsorption. The adsorption behavior performs differently after switch of surface charge for both adsorbents. The adsorption mechanism shows that the adsorption capacity of both Fe3O4@PDA and Fe3O4@C is mainly determined by the electrostatic interaction between adsorbents and dyes. (C) 2017 Elsevier B.V. All rights reserved.
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收藏
页码：260 / 265
页数：6
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