Indandione oligomer@graphene oxide functionalized nanocomposites for enhanced and selective detection of trace Cr2+ and Cu2+ ions

Recent advances in the modification of electrodes for trace metal analysis: a review

“…Nandy et al 97 synthesized a block copolymer from poly (methyl methacrylate) and poly(2-acrylamido-2-methylpropane sulfonic acid) and, in combination with Ag-NPs used it to modify a GCE for the determination of Hg 2+ . Different forms of carbon-containing materials (i.e., graphene, GO, rGO, CNTs, and g-C 3 N 4 ), 29,32,38,45,80,87,91,98,99,101,141,142,144,176,183,184,206 NPs and nanoflakes, 23,87,94,[96][97][98][99]101,102,124,176,182,200,218 and MOFs 208,209,213,216 were combined with the polymers and biopolymers to obtain the modified electrodes. Chelating agents, such as 2,2′,2″,2′′′-(ethane-1,2-diyldinitrilo)tetraacetic acid (EDTA) and L-cysteine, have also been included in these polymer-containing nanocomposites.…”

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

“…As a result, a large amount of cleaning agents are used, which increase the operation and maintenance costs [ 198 , 199 , 200 ]. Numerous research groups have tried different technologies to fabricate the membrane, viz; interfacial polymerization, track-etching, coating, stretching, phase inversion, and electro-spinning for the modification and improvement of the membrane surfaces, but it still requires a lots of improvement [ 202 , 203 , 204 , 205 ]. Some common techniques used to fabricate the membranes were shown in Figure 16 .…”

“…The second challenge is the aggregation of the GO–metal oxide nanomaterials on the membrane surfaces, which diminishes the active surface area, the porosity, and the overall performance of the membrane. Over the last two decade or so, many research [ 197 , 198 , 199 , 200 , 201 , 202 ] groups have made attempts to remove this challenge by making alterations in the synthesis of graphene oxide–metal oxide nanomaterial and decorated it on the polymeric membranes with different methods [ 201 , 202 , 203 , 204 , 205 ].…”

Reduction of hexavalent chromium using sulphonated polyether ether ketone as proton exchange membrane in microbial fuel cells

“…Several methods were researched in recent days for heavy metal removal such as ionic covalent organic frameworks for uranium, 18,19 nanostructures for photocatalytic reduction, 20 various cathode catalysts, 21,22 nano‐adsorbents, 23 N‐doped carbon nanotubes, 24 indandione oligomer@graphene oxide functionalized nanocomposites, 25 modified graphene membranes for Copper (II) ions 26 and glycine‐modified Fe/Zn‐layered double hydroxides for As(V) removal 27 …”

“…Cr(VI) is reduced to Cr(III) via Cr(V) and Cr(IV) in the cytoplasm by an electron transport chain. 17 Several methods were researched in recent days for heavy metal removal such as ionic covalent organic frameworks for uranium, 18,19 nanostructures for photocatalytic reduction, 20 various cathode catalysts, 21,22 nano-adsorbents, 23 N-doped carbon nanotubes, 24 indandione oligomer@graphene oxide functionalized nanocomposites, 25 modified graphene membranes for Copper (II) ions 26 and glycine-modified Fe/Zn-layered double hydroxides for As(V) removal. 27 Chemical methods like carbon microfibers 28,29 ZnNiCr-layered double hydroxides, 30 Chitosan-coated-magnetite with covalently grafted polystyrene based carbon nanocomposites, 31 polyethyleneimine-modified magnetic starch microspheres for Cd(II) adsorption 32 and cocnut shell derived activated carbon 33 were studied for Cr(VI) removal.…”