Graphene oxide/cellulose membranes in adsorption of divalent metal ions

Abstract

In this paper, graphene oxide/cellulose membranes were prepared in order to perform effective adsorption of heavy metal ions: cobalt, nickel, copper, zinc, cadmium and lead.

Lead removal from water – dependence on the form of carbon and surface functionalization

“…The obtained results are summarized in Fig. 3 and 4 for COOH functionalized CNT and RGO samples, respectively, as well as ESI , Tables S3 and S4 8,14,20,27,30,34,39,[55][56][57][58][59][60] For O 1s peak, peak at 533.1-533.6 eV corresponds to C-OH bonding, while peak at 530.6-532.4 eV corresponds to carboxyl (-COO) and carbonyl (C]O) bondings. 27,30,37,[56][57][58] In addition, Pb signal was detected in all the samples aer the lead adsorption (see ESI, Fig.…”

“…Nevertheless, it is very clear that surface functionalization and/or preparing nanostructured carbon-based composites can result in efficient heavy metal removal from water. A wide range of surface functionalizations, morphologies, and different composites has been reported, including those based on carbon nanotubes (CNTs), [5][6][7][10][11][12][13][15][16][17][23][24][25][26]37,40 graphene oxide (GO), 8,9,14,[18][19][20][21][22]27,30,31,36,[38][39][40][41] and reduced graphene oxide (RGO). 34 It is well recognized that -COOH and -OH functional groups result in negative surface charge in aqueous solution, which enhances the adsorption of positively charged metal ions.…”

Synthesis and Application of Magnetic Graphene Oxide Modified with 8‐Hydroxyquinoline for Extraction and Preconcentration of Trace Heavy Metal Ions

“…Graphene and graphene oxide, the new members of the carbon-based materials, exhibit great potential to be a very useful adsorbent for preconcentration of metal ions. [43][44][45][46] In the current research, for the first time, the modification of magnetic GO with the well-known ligand 8-hydroxyquinoline was described and applied to rapid and low-cost extraction of trace Cd(II) and Pb(II) ions from various matrices. Box-Behnken design was employed for the optimization of the extraction and elution steps.…”

Magnetic properties of cellulose‐grafted reduced graphite oxide decorated with Ni nanoparticles

“…In addition, cellulose is a polysaccharide exhibiting hydrophilicity, biocompatibility, and biodegradability and containing hydroxyl and carboxyl groups that can be used for the functionalization of graphene in presence of Nickel nanoparticles with potential applications in the areas of biocomposites, and biosensors . Several works reported the synthesis of cellulose/GO nanocomposite materials and the most common methods to synthesize polymer/graphene (oxide) hybrid materials are based on the use of melt and solvent blending techniques . Wu et al and Sitko et al reported the adsorption of nickel ions on graphene oxide/cellulose membranes prepared by a filtration assembly and a freeze drying method, respectively.…”

“…Several works reported the synthesis of cellulose/GO nanocomposite materials and the most common methods to synthesize polymer/graphene (oxide) hybrid materials are based on the use of melt and solvent blending techniques . Wu et al and Sitko et al reported the adsorption of nickel ions on graphene oxide/cellulose membranes prepared by a filtration assembly and a freeze drying method, respectively. Recently, we reported the immobilization of gold nanoparticles on the surface of cellulose‐grafted to increase the number of anchor groups for AuNPs in comparison with neat GO.graphene oxide sheets and he grafting of cellulose onto rGO was conducted in three steps followed by the deposition of the gold particles via a chemical reduction of Au 3+ .…”