Nanocomposites based on Hofmann-type structure NiII(pz)[NiII(CN)4] (pz = pyrazine) nanoparticles for reversible iodine capture. Issue 1 (12th November 2014)

• Record Type: Journal Article
• Authors: Massasso, G.; Rodriguez-Castillo, M.; Long, J.; Grandjean, A.; Onida, B.; Guari, Y.; Guerin, Ch.; Larionova, J.
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 1(2015)
• Page Start: 179
• Page End: 188
• Publication Date: 2014-11-12
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta04855e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Hybrid nanocomposites based on nanoparticles with the Hofmann-type structure Ni II (pz)[Ni II (CN)4 ] (where pz = pyrazine) confined into mesoporous silica or porous glass pearls were synthesised and studied for efficient iodine capture from solution. Abstract : Hybrid nanocomposites based on nanoparticles with the Hofmann-type structure Ni II (pz)[Ni II (CN)4 ] (where pz = pyrazine) confined into mesoporous silica or porous glass pearls were synthesised by sequential coordination of the molecular precursors into the pores of the functionalized matrices. Infrared (IR) and UV/Visible (UV-Vis) spectroscopy, powder X-ray diffraction (PXRD), and transmission electron microscopy (TEM) reveal the presence of uniformly-sized spherical Ni II (pz)[Ni II (CN)4 ] nanoparticles of 3–6 nm, which are homogeneously dispersed into the matrices. These nanocomposites are able to efficiently capture iodine from cyclohexane solutions with a maximum sorption capacity of 1.75 mmol per g of material. A particular emphasis is given on the mechanism of iodine sorption as well as on the sorption cycling ability of the materials.