In situ preparation of magnetic Fe3O4/chitosan nanoparticles via a novel reduction-precipitation method and their application in adsorption of reactive azo dye

被引：226

作者：

Cao, Chunhua ^{[1
,2
]}

Xiao, Ling ^{[1
]}

Chen, Chunhua ^{[2
]}

Shi, Xiaowen ^{[1
]}

Cao, Qihua ^{[1
]}

Gao, Lin ^{[2
]}

机构：

[1] Wuhan Univ, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China

[2] Jianghan Univ, Coll Chem & Environm Engn, Minist Educ, Key Lab Optoelect Chem Mat & Devices, Wuhan 430056, Peoples R China

来源：

POWDER TECHNOLOGY | 2014年 / 260卷

基金：

中国国家自然科学基金;

关键词：

Chitosan; Fe3O4; Magnetic nanoparticles; Adsorption; Reactive brilliant red X-3B; BRILLIANT RED X-3B; AQUEOUS-SOLUTION; PHOTOCATALYTIC DECOLORIZATION; ENHANCED ADSORPTION; ACTIVATED CARBON; METHYLENE-BLUE; CONGO RED; KINETICS; THERMODYNAMICS; EQUILIBRIUM;

D O I：

10.1016/j.powtec.2014.03.025

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

Magnetic Fe3O4/chitosan nanoparticles (MFe3O4/CS NPs) were in situ prepared successfully by a simple reduction-precipitation method through partial reduction of Fe3+ with sodium sulfite, precipitation with ammonia at room temperature, and then cross-linking with epoxy chloropropane. The nanoparticles were characterized by HRTEM, BET, XRD, FT-IR, TGA and VSM. MFe3O4/CS NPs were quasi-spherical or ellipsoidal in shape and about 7 nm in average diameter, exhibiting superparamagnetic properties with a saturation magnetization value of 17.1 emu/g. The adsorption behaviors of MFe3O4/CS NPs towards reactive brilliant red X-3B (X-3B) were investigated, including pH effect, adsorbent dosage, adsorption equilibrium and adsorption kinetics. It was found that the adsorption performances of X-3B on MFe3O4/CS NPs were strongly dependent on both initial pH and the adsorbent dosage. The adsorption equilibrium data fitted well with the Langmuir isotherm model and the adsorption process followed the pseudo-second-order kinetic model. Thermodynamic parameters such as free energy (Delta G degrees), enthalpy (Delta H degrees), and entropy (Delta S degrees) indicated that the adsorption was spontaneous and endothermic. Besides, the recycling experiments showed good reusability of MFe3O4/CS NPs as adsorbents. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：90 / 97

页数：8

共 46 条

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