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Nwanya AC, Razanamahandry LC, Bashir AKH, Ikpo CO, Nwanya SC, Botha S, Ntwampe SKO, Ezema FI, Iwuoha EI, Maaza M. Industrial textile effluent treatment and antibacterial effectiveness of Zea mays L. Dry husk mediated bio-synthesized copper oxide nanoparticles. J Hazard Mater 2019; 375:281-289. [PMID: 31078988 DOI: 10.1016/j.jhazmat.2019.05.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 04/14/2019] [Accepted: 05/02/2019] [Indexed: 05/02/2023]
Abstract
Zea mays L. dry husk extract was used to bio synthesize copper oxide nanoparticles. Red coloured cubic Cu2O nanoparticles were obtained for the first time via this simple, eco- friendly, green synthesis route. The Cu2O nanoparticles were thermally oxidized to pure monoclinic CuO nanoparticles at 600 °C. The phases of the copper oxides were confirmed from the x-ray diffraction (XRD) studies. The nanoparticle sizes as obtained from high resolution transmission electron microscope (HRTEM) analysis range from 10 to 26 nm, 36-73 nm and 30-90 nm for the unannealed Cu2O, 300 °C and 600 °C annealed CuO respectively. The values of the bandgap energies obtained from diffuse reflectance of the nanoparticles are 2.0, 1.30 and 1.42 eV respectively for the unannealed, 300 °C, and 600 °C annealed copper oxide nanoparticles. The 600 °C annealed copper oxide nanoparticles showed 91% and 90% degradation ability for methylene blue dye (BM) and textile effluent (TE) respectively under visible light irradiation. While CuO_300 is more effective to inhibit the growth of Escherichia coli 518,133 and Staphylococcus aureus 9144, Cu2O is better for Pseudomonas aeruginosa and Bacillus licheniformis. The results confirm the photo-catalytic and anti-microbial effectiveness of the copper oxide nanoparticles.
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Affiliation(s)
- Assumpta Chinwe Nwanya
- Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria; UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, South Africa; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West, PO Box 722, 7129, Somerset West, South Africa.
| | - Lovasoa Christine Razanamahandry
- UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, South Africa; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West, PO Box 722, 7129, Somerset West, South Africa
| | - A K H Bashir
- UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, South Africa; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West, PO Box 722, 7129, Somerset West, South Africa
| | - Chinwe O Ikpo
- Sensor Lab, Department of Chemistry, University of the Western Cape, Bellville, 7535, Cape Town, South Africa
| | - Stephen C Nwanya
- Department of Mechanical Engineering, University of Nigeria, Nsukka, Nigeria
| | - Subelia Botha
- Electron Microscope Unit, University of the Western Cape, South Africa
| | - S K O Ntwampe
- Bioresource Engineering Research Group (BioERG), Faculty of Applied Science Department of Biotechnology Cape Peninsula University of Technology, P.O. Box 652, Cape Town, 8000, South Africa
| | - Fabian I Ezema
- Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria; UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, South Africa; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West, PO Box 722, 7129, Somerset West, South Africa
| | - Emmanuel I Iwuoha
- Sensor Lab, Department of Chemistry, University of the Western Cape, Bellville, 7535, Cape Town, South Africa
| | - Malik Maaza
- UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, South Africa; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West, PO Box 722, 7129, Somerset West, South Africa
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