Synthesis of water-soluble magnetic graphene nanocomposites for recyclable removal of heavy metal ions

Synthesis of thiol-functionalized magnetic graphene as adsorbent for Cd(II) removal from aqueous systems

“…To 9 eliminate these deleterious effect, various methods have been used 10 in removal of Cd(II) from aqueous solution such as ion exchange 11 [2], precipitation [3] and adsorption [4], but high cost or limited 12 capacity restricts their application on a large scale. Recently, the 13 rapid development of nanoscale science and engineering is 14 creating new opportunities to prepare cost-effective and high- 15 capacity adsorbents [5]. Li et al [6] reported that surface oxidized 16 carbon nanotubes showed high adsorption efficiency for Cd(II) 17 removal from water.…”

“…To solve these problems, various 28 magnetic graphene nanomaterials are developed because they 29 could be easily separated by external magnets [11][12][13]. Zhang et al 30 [14] synthesized Q4 water-soluble magnetic graphene nano-compo- 31 sites via a copper catalyzed azide-alkyne cyclo-addition reaction 32 and used them as nano-adsorbents for recyclable removal of Cu 2+ , 33 Cd 2+ and Pb 2+ ions from aqueous solution. Although previous 34 studies demonstrate that thiol-functionalized adsorbents exhibit a 35 specific binding capability toward highly toxic heavy metal ions 36 due to the existence of complex effect [15,16], to our knowledge, 37 thiol-functionalized magnetic graphene composite has not been 38 applied as adsorbents in removal of Cd(II) from aqueous solutions.…”

Preparation of efficient magnetic biosorbents by clicking carbohydrates onto graphene oxide

“…Click reaction was used as a facile strategy to attach saccharides onto dendrimers [33] and carbon nanotubes [34]. However, very few click reactions have been performed on GO [35][36][37][38][39][40][41][42] and only a couple of covalent attachment of saccharides onto graphene have been reported so far [25,35,[43][44][45]. Carbohydrate/graphene nanocomposites have also been reported [46][47][48].…”

Facile synthesis of monodisperse functional magnetic dialdehyde starch nano-composite and used for highly effective recovery of Hg(II)

“…Magnetic organic-inorganic nano-composite with magnetic core and polymeric shell are caused great interest compared with other nano-materials due to its good compatibility and functionalization with other materials, and it also could prevent the agglomeration of magnetic nanoparticles by organic shell which served as surfactant or stabilizer (Zhang et al, 2013c;Mu et al, 2013). As the burgeoning materials, varies magnetic organic-inorganic nano-composites have been reported and shown remarkable potential in the field of heavy metal removal because their high surface area, enhanced active sites and abundant functional groups on the surface (Zhu et al, 2010;Musico et al, 2013;Wang et al, 2011).…”