Dyes Adsorption Behavior of Fe3O4 Nanoparticles Functionalized Polyoxometalate Hybrid

Molecules

Haiyan Zhao¹  Qingxi Meng¹  Mingxue Li¹  Hongling Liu¹  Jie Li¹  Bowen Chang¹  Chen Si¹ 

[1] Henan Key Laboratory of Polyoxometalates Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China;

关键词: polyoxometalate;    Fe₃O₄;    nanocomposite;    adsorption;    dyes;   

DOI  :  10.3390/molecules24173128

来源: DOAJ

【 摘 要 】

The magnetic adsorbent, Fe₃O₄@[Ni(HL)₂]₂H₂[P₂Mo₅O₂₃]·2H₂O (Fe₃O₄@1), is synthesized by employing the nanoparticles Fe₃O₄ and polyoxometalate hybrid 1. Zero-field-cooled (ZFC) and field-cooled (FC) curves show that the blocking temperature of Fe₃O₄@1 was at 120 K. Studies of Fe₃O₄@1 removing cationic and anionic dyes from water have been explored. The characterization of Fe₃O₄@1, effects of critical factors such as dosage, the concentration of methylene blue (MB), pH, adsorption kinetics, isotherm, the removal selectivity of substrate and the reusability of Fe₃O₄@1 were assessed. The magnetic adsorbent displayed an outstanding removal activity for the cationic dye at a broad range of pH. The adsorption kinetics and isotherm models revealed that the adsorption process of Fe₃O₄@1 was mainly governed via chemisorption. The maximum capacity of Fe₃O₄@1 adsorbing substance was 41.91 mg g⁻¹. Furthermore, Fe₃O₄@1 showed its high stability by remaining for seven runs of the adsorption-desorption process with an effective MB removal rate, and could also be developed as a valuable adsorbent for dyes elimination from aqueous system.

【 授权许可】

Unknown