标题：In situ preparation of magnetic Fe3O4/chitosan nanoparticles via a novel reduction-precipitation method and their application in adsorption of reactive azo dye作者：Cao, Chunhua; Xiao, Ling; Chen, Chunhua; Shi, Xiaowen; Cao, Qihua; Gao,Lin

来源出版物：POWDER TECHNOLOGY卷：260页：90-97 DOI：10.1016/j.powtec.2014.03.025 出版年：JUL 2014

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.

入藏号：WOS:000336873200013

文献类型：Article

语种：English

作者关键词：Chitosan, Fe3O4, Magnetic nanoparticles, Adsorption, Reactive brilliant red X-3B

扩展关键词：BRILLIANT RED X-3B; AQUEOUS-SOLUTION; FE3O4-CHITOSAN NANOPARTICLES; PHOTOCATALYTIC DECOLORIZATION; CHITOSAN DERIVATIVES; OXIDE NANOPARTICLES; ENHANCED ADSORPTION; ACTIVATED CARBON; METHYLENE-BLUE; WASTE-WATER

电子邮件地址：xiaoling9119@whu.edu.cn

地址：

[Cao, Chunhua; Xiao, Ling; Shi, Xiaowen; Cao, Qihua]Wuhan Univ, Coll Resource & Environm*Sci, Wuhan 430072, Peoples R China.

[Cao, Chunhua; Chen, Chunhua; Gao, Lin] Jianghan Univ, Coll Chem & Environm Engn, Minist Educ, Key Lab Optoelect Chem Mat & Devices, Wuhan 430056, Peoples R China.

研究方向：Engineering

ISSN：0032-5910