Facile preparation of chitosan enwrapping Fe₃O₄ nanoparticles and MIL-101(Cr) magnetic composites for enhanced methyl orange adsorption

详细信息    查看全文

• 作者：Lingli Liu ; Jinlong Ge ; Le-Ting Yang ; Xia Jiang…
• 关键词：Adsorption ; Magnetic adsorbent ; MIL ; 101 ; Chitosan ; Methyl orange
• 刊名：Journal of Porous Materials
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：23
• 期：5
• 页码：1363-1372
• 全文大小：2,896 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Characterization and Evaluation Materials
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1573-4854
• 卷排序：23

文摘

A novel magnetic composite bioadsorbents composed of chitosan wrapping various content of nanoscale Fe₃O₄ and MIL-101 ([Cr₃F(H₂O)₂O(bdc)₃], bdc = 1,4 benzenedicarboxylate, m-CS/Fe₃O₄/MIL-101) were prepared for the adsorptive removal of a harmful anionicdye methyl orange (MO), from aqueous solutions. The introduction of chitosan could obviously increase the adsorption capacity of MO onto the metal–organic frameworks by about 40 % in comparison with pure MIL-101. The adsorption kinetics was investigated, and the experimental data and adsorption isotherms were better fitted by pseudo-second order kinetic model and Langmuir isotherm, respectively. Furthermore, the m-CS/Fe₃O₄/MIL-101 composites are reusable after adsorption in water and could be effectively separated by applying a magnetic field after adsorption.