Metal-organic framework preparation using magnetic graphene oxide-β-cyclodextrin for neonicotinoid pesticide
Guangyang Liu1, Lingyun Li1, Donghui Xu1
1Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture of China, Beijing 100081, PR China.
Abstract:
A novel magnetic copper-based metal-organic framework (M-MOF) was prepared using a Fe4O3-graphene oxide (GO)-β-cyclodextrin (β-CD) nanocomposite as the magnetic core and support, and used for adsorption and removal of neonicotinoid insecticide pollutants from aqueous solution. M-MOF characterization suggested that 1Fe4O3-GO-β-CD consisted of a thin single layer with anchored Fe3O4. The M-MOF was coated on the Fe4O3-GO-β-CD surface. The M-MOF had a large Brunauer-Emmett-Teller surface area (250.33m2g-1) and high super-paramagnetism with saturation magnetization of 10.47emug-1. Adsorption model analysis showed that the equilibrium data for thiacloprid fitted Langmuir monolayer adsorption and the other insecticides tested showed Freundlich bimolecular layer adsorption. The results show that M-MOF is a promising hybrid adsorbent for rapid removal of neonicotinoid insecticide pollutants from environmental waters.
