Universität zu Köln

Onwudiwe, Damian C., Oyewo, Opeyemi A., Atamtuerk, Ufuk, Ojelere, Olusola ORCID: 0000-0002-3112-1257 and Mathur, Sanjay ORCID: 0000-0003-2765-2693 (2020). Photocatalytic reduction of Cr(VI) using star-shaped Bi2S3 obtained from microwave irradiation of bismuth complex. J. Environ. Chem. Eng., 8 (4). OXFORD: ELSEVIER SCI LTD. ISSN 2213-3437

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Abstract

The reduction of hexavalent chromium specie, Cr(VI), to trivalent chromium, Cr(III), in aqueous solutions using star-shaped nanostructured Bi2S3, prepared via a facile microwave irradiation of bismuth dithiocarbamate complex is reported. The bismuth sulphide were characterized using X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectrometer (EDX). The study showed that Cr(VI) reduction was dependent on its initial concentration, the pH value of the solution, and the Bi2S3 dosage. Almost all the Cr(VI) in a concentration of 2 ppm and at pH 2 was reduced within 90 min by the addition of 100 mg L-1 of the Bi2S3. The reduction capacity of the nanostructure was attributed to photocatalytic-induced reduction process as well as the high specific surface area. Pseudo-first order kinetics model parameters well described the Cr(VI) reduction experimental data with high correlation factor of 0.998. This study demonstrates that microwave irradiation of precursor complex could offer a quick and facile route to nanostructured photocatalyst, which are good candidate material for the removal of trace chromium in surface water.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Onwudiwe, Damian C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oyewo, Opeyemi A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Atamtuerk, Ufuk UNSPECIFIED UNSPECIFIED UNSPECIFIED Ojelere, Olusola UNSPECIFIED orcid.org/0000-0002-3112-1257 UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-324705
DOI:	10.1016/j.jece.2020.103816
Journal or Publication Title:	J. Environ. Chem. Eng.
Volume:	8
Number:	4
Date:	2020
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	2213-3437
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HEXAVALENT CHROMIUM; AQUEOUS-SOLUTIONS; ASSISTED SYNTHESIS; DIFFERENT MORPHOLOGIES; THERMAL-DECOMPOSITION; CHEMICAL-REDUCTION; EFFICIENT REMOVAL; SULFIDE; NANORODS; ADSORPTION Multiple languages Engineering, Environmental; Engineering, Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32470