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.