title: Graphene oxide supported copper oxide nanoneedles: An efficient hybrid material for removal of toxic azo dyes.
abstract: Herein, we report a simple, one step synthesis of hybrid copper oxide nanoneedles on graphene oxide sheets (GO-CuONNs) through sonochemical method. The present method affords a facile mean for controlling effective concentration of the active CuO nanoneedles on the graphene oxide sheets, and also offers the necessary stability to the resulting GO-CuONNs structure for adsorption transformations.Furthermore, this hybrid GO-CuONNs is successfully employed in the removal of a series of hazardous ionic organic dyes namely coomassie brilliant blue, methylene blue, congo red and amidoblack 10B. Through careful investigation of the material, we found that the synergetic effect between CuONNs and GO play a significant role in the adsorption of all the dyes studied. The prepared hybrid material contains both hydrophobic and hydrophilic environment which is expected to enhance the electrostatic interaction between the adsorbent and the dye molecules, consequently favouring the adsorption process.
authors.affiliation: Department of Chemistry, Pondicherry University, Puducherry-605014, India.
authors.forename: Rajendiran
authors.initials: R
authors.lastname: Rajesh
authors.affiliation: Department of Chemistry, Pondicherry University, Puducherry-605014, India.
authors.forename: Sahithya S
authors.initials: SS
authors.lastname: Iyer
authors.affiliation: Department of Chemistry, Pondicherry University, Puducherry-605014, India.
authors.forename: Jayabal
authors.initials: J
authors.lastname: Ezhilan
authors.affiliation: Department of Chemistry, School of Advanced Sciences, VIT University, Vellore-632014, India. Electronic address: senthilanalytical@gmail.com.
authors.forename: S Senthil
authors.initials: SS
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, Pondicherry University, Puducherry-605014, India. Electronic address: venkatesanr.che@pondiuni.edu.in.
authors.forename: Rengarajan
authors.initials: R
authors.lastname: Venkatesan
keywords: Adsorption; Copper oxide nanoneedles; Graphene oxide; azo dyes