CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes

Cupric oxide nanoparticles (CuO NPs) were prepared via a chemical precipitation method using the precursor of copper (II) nitrate trihydrate. X-ray diffraction analysis confirms that the CuO NPs were a monoclinic crystal structure. The energy band gap of CuO NPs was found to be about 1.76 eV. The ob...

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Autor principal: Martha Ramesh
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Lenguaje:EN
Publicado: IWA Publishing 2021
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spelling oai:doaj.org-article:0c2c9683baa34191a438214ee868cbe82021-11-05T21:16:36ZCuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes1751-231X10.2166/wpt.2021.067https://doaj.org/article/0c2c9683baa34191a438214ee868cbe82021-10-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/4/1078https://doaj.org/toc/1751-231XCupric oxide nanoparticles (CuO NPs) were prepared via a chemical precipitation method using the precursor of copper (II) nitrate trihydrate. X-ray diffraction analysis confirms that the CuO NPs were a monoclinic crystal structure. The energy band gap of CuO NPs was found to be about 1.76 eV. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, such as methylene blue (MB), acid yellow 23 (AY 23) and reactive black 5 (RB 5), with a low concentration in the presence of visible light. The results show that the highest decolorization achieved was 67.8% and 66.3% for RB-5 dye and AY-23 dye, while 43.5% for MB dye from aqueous solution at 5 h illumination. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, RB-5, AY-23 and MB dye obeys pseudo first order kinetics with values of −0.112, −0.174 and −0.201 h−1, respectively. HIGHLIGHTS Chemically prepared Cupric oxide nanoparticles (CuO NPs) were used as efficient photo catalyst for degrading Azo dyes.; The energy band gap of CuO NPs was found to be about 1.76 eV.; Azo dyes like RB-5, AY-23 and MB obey pseudo first order kinetics.; The photocatalysis results show that the highest degradation achieved was 67.8% and 66.3% for RB-5 dye and AY-23 dye, while 43.5% for MB dye from aqueous solution at 5 h illumination.; The enhanced photo catalytic degradation of Azo dye can be explained in terms of ion charge and molecular weight.; Evaluation of photocatalytic degradation of RB5 and MB with reported literature data.;Martha RameshIWA Publishingarticleacid yellow 23cuo npsmethylene bluemolecular weightphoto decolorizationreactive black 5Environmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 4, Pp 1078-1090 (2021)
institution DOAJ
collection DOAJ
language EN
topic acid yellow 23
cuo nps
methylene blue
molecular weight
photo decolorization
reactive black 5
Environmental technology. Sanitary engineering
TD1-1066
spellingShingle acid yellow 23
cuo nps
methylene blue
molecular weight
photo decolorization
reactive black 5
Environmental technology. Sanitary engineering
TD1-1066
Martha Ramesh
CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
description Cupric oxide nanoparticles (CuO NPs) were prepared via a chemical precipitation method using the precursor of copper (II) nitrate trihydrate. X-ray diffraction analysis confirms that the CuO NPs were a monoclinic crystal structure. The energy band gap of CuO NPs was found to be about 1.76 eV. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, such as methylene blue (MB), acid yellow 23 (AY 23) and reactive black 5 (RB 5), with a low concentration in the presence of visible light. The results show that the highest decolorization achieved was 67.8% and 66.3% for RB-5 dye and AY-23 dye, while 43.5% for MB dye from aqueous solution at 5 h illumination. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, RB-5, AY-23 and MB dye obeys pseudo first order kinetics with values of −0.112, −0.174 and −0.201 h−1, respectively. HIGHLIGHTS Chemically prepared Cupric oxide nanoparticles (CuO NPs) were used as efficient photo catalyst for degrading Azo dyes.; The energy band gap of CuO NPs was found to be about 1.76 eV.; Azo dyes like RB-5, AY-23 and MB obey pseudo first order kinetics.; The photocatalysis results show that the highest degradation achieved was 67.8% and 66.3% for RB-5 dye and AY-23 dye, while 43.5% for MB dye from aqueous solution at 5 h illumination.; The enhanced photo catalytic degradation of Azo dye can be explained in terms of ion charge and molecular weight.; Evaluation of photocatalytic degradation of RB5 and MB with reported literature data.;
format article
author Martha Ramesh
author_facet Martha Ramesh
author_sort Martha Ramesh
title CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
title_short CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
title_full CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
title_fullStr CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
title_full_unstemmed CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes
title_sort cuo as efficient photo catalyst for photocatalytic decoloration of wastewater containing azo dyes
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/0c2c9683baa34191a438214ee868cbe8
work_keys_str_mv AT martharamesh cuoasefficientphotocatalystforphotocatalyticdecolorationofwastewatercontainingazodyes
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