Nickel oxide (NiO) nanosheets are synthesized via a one-pot method using an amphiphilic block copolymer in aqueous solution. Block copolymer works as a structure-directing agent and template in the formation of the NiO nanosheets. The controlled hydrolysis of urea slowly releases ammonia that can form Ni(OH)<sub>2</sub>,which is stabilized in the polymer solution. The calcination removes the polymeric part of the nanocomposite and converts Ni(OH)<sub>2</sub> into NiO with a face-centered cubic phase. Physisorption and electrostatic interactions between negatively charged congo red (CR) and positively charged NiO nanosheets allow the adsorption of CR dye at ambient conditions. The adsorption of dyes follows pseudo-second-order kinetics, and the adsorbents are regenerated by calcination and recycled three times at similar efficiencies.

Polymer templated synthesis of NiO nanosheets as efficient and recyclable adsorbents

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.