Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.

Authors : Felıx NWORIE, Jane EBUNOHA

Pages : 137-154

Doi:10.18596/jotcsa.775739

View : 8 | Download : 8

Publication Date : 2021-02-28

Article Type : Research Paper

Abstract :In this study, bisinsert ignore into journalissuearticles values(salicylidene);ethylenediamine insert ignore into journalissuearticles values(SALEN); functionalized carbon dot derived from waste banana peels was synthesized using facile hydrothermal technique and the optical biomarker and adsorption properties of the highly fluorescent red nanomaterial studied. The carbon dot and its functionalized counterpart were characterized using FTIR, SEM/EDX and UV-Visible technique. Evaluation of the optical properties of the yellowish brown carbon dot and reddish highly luminescent functionalized carbon dot indicated band gap energy values of 1.85 and 2.04 eV respectively. Extraneous variables such as effect of initial metal ion concentration, pH and contact time were studied in the batch extraction process for the sorption of Cdinsert ignore into journalissuearticles values(II); ions from aqueous solution. The sorption of Cdinsert ignore into journalissuearticles values(II); ion was observed to be highest at pH 5 with 99.3 % removal efficiency. The adsorption isotherm and kinetic models indicated interplay of physisorption and chemisorption processes. The mechanism for the chelation of Cdinsert ignore into journalissuearticles values(II); ions onto the surface of the functionalized carbon dot was mainly governed by inner aphere chelation and ion exchange. Reusability of the material was evaluated using adsorption-desorption experiments. Result of the study indicated the potential of the functionalized carbon dot as insert ignore into journalissuearticles values(i); semiconductor materials with strong photoluminescence at the visible region which could be used as environmental biomarker and as sensor insert ignore into journalissuearticles values(ii); effective, efficient and low cost adsorbent for remediating Cdinsert ignore into journalissuearticles values(II); ions contaminated environment.
Keywords : adsorption studies, carbon dot nanoparticle, cadmium, adsorption mechanism, desorption