Role of EDTA capped cobalt oxide nanomaterial in photocatalytic degradation of dyes

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Published: Mar 22, 2021
DOI: https://doi.org/10.2298/JSC200711074S
Keywords:
photocatalytic activity crystal violet malachite green adsorption isotherm

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Meena Singh
Department of Applied Science, The NorthCap University, Sector 23A, Gurugram-122017, India
Dipti Vaya
Department of Chemistry, Amity School of Applied Sciences, Amity University Haryana, Gurugram-122413, India
https://orcid.org/0000-0002-1314-2142
Ravi Kumar
Department of Chemistry, NIT, Srinagar, Jammu and Kasmir-190006, India
https://orcid.org/0000-0002-5048-7860
Bijoy Das
Department of Applied Science, The NorthCap University, Sector 23A, Gurugram-122017, India
https://orcid.org/0000-0001-7427-4803

Abstract

Dyes released from textile, paint, and various other industries in wastewater have posed long term environmental damage. Functional nano­mat­erials provide a hope and opportunities to treat these effluent wastes in a rapid and efficient way due to their large surface area to volume ratios. Synthesis of 2,2',2'',2'''-(ethane-1,2-diyldinitrilo)tetraacetic acid (EDTA) cap­ped cobalt oxide nanomaterial, as a photocatalyst, has been investigated and used for the rapid and efficient removal of malachite green (MG) and crystal violet (CV) dyes. The morphological, structural, optical, chemical and thermal properties of the synthesized nanomaterial were analysed using different characterization tools such as scanning electron microscopy, transmis­sion electron microscopy, X-ray diffraction, ultra violet–visible and Fourier transform infrared (FT-IR) spectroscopy and thermo­gra­vimetric analysis. The prepared EDTA capped cobalt oxide nanomaterials display better photocatalytic degradation, 56.3 % for MG and 37.9 % for CV in comparison to the pure cobalt oxide, 47.7 and 27.6 %, respectively, under visible light illumination. The kinetics of the deg­radation followed the pseudo-first order and it corresponds to Freundlich ads­orption isotherm model. The incremental photodegradation of these two dyes was attributed by mor­phology of the nanomaterial which favour effective elec­tron/hole separation.

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How to Cite
[1]
M. Singh, D. Vaya, R. Kumar, and B. Das, “Role of EDTA capped cobalt oxide nanomaterial in photocatalytic degradation of dyes”, J. Serb. Chem. Soc., vol. 86, no. 3, pp. 327–340, Mar. 2021.
Issue
Vol. 86 No. 3 (2021)
Section
Environmental Chemistry
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