Yıl 2021, Cilt 8 , Sayı 1, Sayfalar 137 - 154 2021-02-28

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

Felıx NWORIE [1] , Jane EBUNOHA [2]


In this study, bis(salicylidene)ethylenediamine (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 Cd(II) ions from aqueous solution. The sorption of Cd(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 Cd(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 (i) semiconductor materials with strong photoluminescence at the visible region which could be used as environmental biomarker and as sensor (ii) effective, efficient and low cost adsorbent for remediating Cd(II) ions contaminated environment.
adsorption studies, carbon dot nanoparticle, cadmium, adsorption mechanism, desorption
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Birincil Dil en
Konular Kimya, Uygulamalı
Yayınlanma Tarihi Summer
Bölüm Makaleler
Yazarlar

Orcid: 0000-0001-7909-7519
Yazar: Felıx NWORIE (Sorumlu Yazar)
Kurum: EBONYI STATE UNIVERSITY, ABAKALIKI
Ülke: Nigeria


Orcid: 0000-0001-7909-7514
Yazar: Jane EBUNOHA
Kurum: EBONYI STATE UNIVERSITY, ABAKALIKI
Ülke: Nigeria


Destekleyen Kurum Ebonyi State University, Abakaliki
Proje Numarası Ref No:EBSU/TETFund/IBR/2015/10
Tarihler

Başvuru Tarihi : 29 Temmuz 2020
Kabul Tarihi : 13 Aralık 2020
Yayımlanma Tarihi : 28 Şubat 2021

Vancouver Nworıe F , Ebunoha J . Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.. Journal of the Turkish Chemical Society Section A: Chemistry. 2021; 8(1): 137-154.