Synthesis of core-shell UiO-66-poly(m-phenylenediamine) composites for removal of hexavalent chromium.
Haiying WangLanjing HouYujun ShenLei HuangYingjie HeWeichun YangTao YuanLinfeng JinChong-Jian TangLiyuan ZhangPublished in: Environmental science and pollution research international (2019)
The present research developed a direct in situ heterogeneous method to synthesize UiO-66-poly(m-phenylenediamine) core-shell nanostructures by inducing assembly of m-phenylenediamine radical on UiO-66 surfaces. The strong interaction between negative charged UiO-66 and positive radical from the oxidation of monomer is the major driving force. The produced UiO-66-poly(m-phenylenediamine) composites exhibited a distinct core-shell morphology with controllable surface features. The UiO-661-PmPD0.5 showed a uniform PmPD shell with a thickness of 40-60 nm and the nanocomposite exhibited a high specific surface area of 319.77 m2 g-1. Moreover, the Cr(VI) adsorption amount of the polymeric shell in the nanocomposites can reach as high as 745 mg g-1, far beyond the performance of the original PmPD. The adsorption tends to be equilibrium within 300 min. This research opens a hopeful window for facile and large-scale fabrication of core-shell nanostructures with controllable core-shell configuration, exhibiting high prospect in heavy metal removal from water.
Keyphrases
- metal organic framework
- reduced graphene oxide
- aqueous solution
- visible light
- heavy metals
- gold nanoparticles
- drug delivery
- photodynamic therapy
- risk assessment
- optical coherence tomography
- escherichia coli
- molecular dynamics simulations
- molecular dynamics
- nitric oxide
- staphylococcus aureus
- highly efficient
- single molecule
- molecularly imprinted
- current status
- sewage sludge
- health risk assessment