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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2021
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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) |
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DOAJ |
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DOAJ |
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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 |
| _version_ |
1718443960801689600 |