Facile high-yield synthesis and purification of lysine-modified graphene oxide for enhanced drinking water purification

Abstract

Lysine-modified graphene oxide is synthesized and exploited as an adsorbent of emerging contaminants in drinking water.

Amino acid-driven adsorption of emerging contaminants in water by modified graphene oxide nanosheets

“…The obtained values, −42.4 ± 1.2 mV for GO-Glu and −49.6 ± 1.4 mV for GO-Met, were comparable to the ones measured for pristine GO (−43.1 ± 2.4 mV) and GO-Lys (−35.2 ± 0.8 mV), meaning that the surface charge cannot explain the observed different adsorption properties. 43…”

“…The zeta potentials (ζ potentials) of GO and modified GO nanosheets were measured in deionized water. The obtained values, −42.4 ± 43 The morphology of the modified graphene was investigated by scanning electron microscopy (SEM) showing the typical GO nanosheet morphology for GO-Glu and GO-Met, with a lateral size of a few micrometres, but more aggregated and multilayer nanosheets (Fig. 2).…”

“…42 In this line, our group recently reported a facile and scalable synthesis of lysine-modified GO (GO-Lys) by amination through microwave-assisted epoxide ring opening reaction, and its purification by an unprecedented microfiltration approach. 43 We showed that modification with lysine enhances the removal capacity of bisphenol A (BPA), benzophenone-4 (BP4), and carbamazepine (CBZ) from tap water.…”

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

“…Graphene oxide (GO) is no doubt a rising star material for nano-building and has shown great potential in membrane technology for water purification [ 164 , 165 , 166 ]. The properties of GO can be extra enhanced by modifications with adding a little sum of divalent alkaline earth metal ions bonded to the functional groups of GO layers [ 167 ].…”

“…In the present time, the fast development of industries even in the countryside causes the contamination of natural water reservoirs through the ejection of poisonous industrial by-products [ 164 , 165 , 166 ]. Therefore, the photocatalytic decomposition of industrial organic by-products is another encouraging technique to eradicate this problem.…”