title: Magnetically separable Prussian blue analogue Mn₃[Co(CN)₆]₂·nH₂O porous nanocubes as excellent absorbents for heavy metal ions.
abstract: The application of Prussian blue analogue (PBA) Mn(3)[Co(CN)(6)](2)·nH(2)O porous nanocubes as absorbents for heavy metal ions has been demonstrated. The result indicates that Mn(3)[Co(CN)(6)](2)·nH(2)O porous nanocubes with average diameter of 240 nm possess excellent adsorption efficiency for Pb(2+) ions (94.21% at initial Pb(2+) concentration of 10 mg L(-1)). Moreover, Mn(3)[Co(CN)(6)](2)·nH(2)O porous nanocubes can also show high adsorption efficiency on heavy metal ions even in a strong acidic solution due to its chemical stability. Notably, an external magnet could be used to accelerate the separation of Mn(3)[Co(CN)(6)](2)·nH(2)O from the treated solution. It is suggested that the high adsorption efficiency may derive from the large surface area, M(3)(II)[M(III)(CN)(6)](2)·nH(2)O porous framework structure and affinity between polarizable π-electron clouds of the cyanide bridges and heavy metals ions.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Ji-Yang
authors.initials: JY
authors.lastname: Mei
authors.forename: Qian-Wang
authors.initials: QW
authors.lastname: Chen
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Nan
authors.initials: N
authors.lastname: Yan
mesh_terms: D000327:Adsorption; D003035:Cobalt / Q000737:chemistry; D003486:Cyanides / Q000737:chemistry*; D005295:Ferrocyanides / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008280:Magnetics; D008345:Manganese / Q000737:chemistry; D019216:Metals, Heavy / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D016062:Porosity
chemical_list: D003486:Cyanides; D005295:Ferrocyanides; D019216:Metals, Heavy; D003035:Cobalt; D008345:Manganese; C000170:ferric ferrocyanide