Lead(ii) uptake by aluminium based magnetic framework composites (MFCs) in water. Issue 39 (4th September 2015)

• Record Type: Journal Article
• Authors: Ricco, Raffaele; Konstas, Kristina; Styles, Mark J.; Richardson, Joseph J.; Babarao, Ravichandar; Suzuki, Kiyonori; Scopece, Paolo; Falcaro, Paolo
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 39(2015)
• Page Start: 19822
• Page End: 19831
• Publication Date: 2015-09-04
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta04154f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : MIL-53(Al) based magnetic framework composites with iron oxide nanoparticles exhibit high uptake of lead(ii ) from aqueous solution. Abstract : The recent combination of Metal-Organic Frameworks (MOFs) and magnetic nanoparticles has shown their potential as a composite material in practical applications including drug delivery, catalysis and pollutant sequestration. Here, we report for the first time the preparation of a robust magnetic nanocomposite material based on an aluminium MOF (MIL-53) and iron oxide nanoparticles for the uptake of lead(ii ) ions. Different aminofunctionalized MIL-53 MOFs were prepared by increasing the 2-aminoterephthalic/terephthalic acid ratio. The composite materials were tested to determine the sequestration capability of heavy metals from various solvents (methanol, DMSO and water), pH (2, 7, 12) and a range of Pb(ii ) concentrations (10–8000 ppm). The magnetic composite based on MIL-53 showed remarkable capacity to sequester Pb(ii ) ions from water (up to 492.4 mg g −1 of composite), the highest recorded for a MOF sorbent system to date. While the MOF played a crucial role in the efficient heavy metal uptake, the magnetic nanoparticles allowed the prompt collection of the sorbent from solution. The triggered release of Pb(ii ) was investigated using an alternating magnetic field. The exceptional adsorption capacity and the response to the magnetic field make this class of innovative functional material a promising candidate for environmental remediation technologies.