Synthesis of metal-organic-framework related core-shell heterostructures and their application to ion enrichment in aqueous conditions.

We show a step-by-step strategy to fabricate MOF related core-shell heterostructures and successfully obtain SiO2@HKUST-1 core-shell nanospheres, which display the distinct ion separation ability of valving the sorption-desorption of fluoride ions by controlling the pH.

Adsorption of lead(II) on O₂-plasma-oxidized multiwalled carbon nanotubes: thermodynamics, kinetics, and desorption.

O(2)-plasma-oxidized multiwalled carbon nanotubes (po-MWCNTs) have been used as an adsorbent for adsorption of lead(II) in water. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy measurements show that the bulk properties of MWCNTs were not changed after O(2)-plasma oxidation. The adsorption capacity of MWCNTs for lead(II) was greatly enhanced after plasma oxidation mainly because of the introduction of oxygen-containing functional groups onto the surface of MWCNTs.