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Idowu Sonde, O., Gbenga Peleyeju, M., Oladipupo Oladoyinbo, F., Rasaq Oloyede, A., Adeniyi Afolabi, T., Adekola Adesokan, H., Ademola Arotiba, O., Olugbenga Dare, E. (2017). Exfoliated graphite/Selenium-Zinc Oxide Nanocomposites for Photodegradation of Organic Dye in Water and Its Antibacterial Activity Against Aater Borne Pathogens. Journal of Nanoanalysis, 4(1), 41-47. doi: 10.22034/jna.2017.01.005
Olubori Idowu Sonde; Moses Gbenga Peleyeju; Fatai Oladipupo Oladoyinbo; Adejare Rasaq Oloyede; Tajudeen Adeniyi Afolabi; Hameed Adekola Adesokan; Omotayo Ademola Arotiba; Enoch Olugbenga Dare. "Exfoliated graphite/Selenium-Zinc Oxide Nanocomposites for Photodegradation of Organic Dye in Water and Its Antibacterial Activity Against Aater Borne Pathogens". Journal of Nanoanalysis, 4, 1, 2017, 41-47. doi: 10.22034/jna.2017.01.005
Idowu Sonde, O., Gbenga Peleyeju, M., Oladipupo Oladoyinbo, F., Rasaq Oloyede, A., Adeniyi Afolabi, T., Adekola Adesokan, H., Ademola Arotiba, O., Olugbenga Dare, E. (2017). 'Exfoliated graphite/Selenium-Zinc Oxide Nanocomposites for Photodegradation of Organic Dye in Water and Its Antibacterial Activity Against Aater Borne Pathogens', Journal of Nanoanalysis, 4(1), pp. 41-47. doi: 10.22034/jna.2017.01.005
Idowu Sonde, O., Gbenga Peleyeju, M., Oladipupo Oladoyinbo, F., Rasaq Oloyede, A., Adeniyi Afolabi, T., Adekola Adesokan, H., Ademola Arotiba, O., Olugbenga Dare, E. Exfoliated graphite/Selenium-Zinc Oxide Nanocomposites for Photodegradation of Organic Dye in Water and Its Antibacterial Activity Against Aater Borne Pathogens. Journal of Nanoanalysis, 2017; 4(1): 41-47. doi: 10.22034/jna.2017.01.005

Exfoliated graphite/Selenium-Zinc Oxide Nanocomposites for Photodegradation of Organic Dye in Water and Its Antibacterial Activity Against Aater Borne Pathogens

Article 5, Volume 4, Issue 1, Winter 2017, Page 41-47  XML PDF (900.67 K)
Document Type: Original Research Paper
DOI: 10.22034/jna.2017.01.005
Authors
Olubori Idowu Sonde* 1, 2; Moses Gbenga Peleyeju2; Fatai Oladipupo Oladoyinbo1; Adejare Rasaq Oloyede3; Tajudeen Adeniyi Afolabi1; Hameed Adekola Adesokan1; Omotayo Ademola Arotiba* 2, 4; Enoch Olugbenga Dare1
1Department of Chemistry, Federal University of Agriculture Abeokuta, Ogun State, Nigeria
2Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, South Africa
3Biotechnology Centre, Federal University of Agriculture Abeokuta, Ogun State, Nigeria
4Centre for Nanomaterials Science Research, University of Johannesburg, Doornfontein 2028, South Africa
Abstract
We report the synthesis and application of a novel Exfoliated graphite/Selenium-Zinc oxide (EG/Se-ZnO) nanocomposite for photodegradation of methylene blue dye and its antibacterial activity. The composite was characterized using XRD, FTIR, SEM and TEM. Applicability of EG/ Se-ZnO nanocomposite as photocatalyst was investigated by the photocatalytic degradation of methylene blue as a model for organic pollutant. The XRD has its highest peak at 101 which indicated that ion diffusion was free from solvent viscosity (peak at 002). FTIR spectra confirmed the formation of EG/Se-ZnO nanocomposite as band at 882 cm-1 and 612 cm-1, 727 cm-1, 1373 cm-1 were associated with vibrational frequency of ZnO lattice and Selenium respectively. The SEM revealed cloudy large particles of the synthesized EG/Se-ZnO composite. TEM image revealed mini-rodlike nanoparticles. 99.5% degradation of methylene blue dye was achieved within 90 minutes of irradiation. The reactions followed first order kinetics with the rate constant of 5.79x10 -2 min-1 and R2 value of 0.9. The enhanced photocatalytic activity of EG/Se-ZnO was ascribed to the capability of graphitic layers to accept and transport electrons from the excited ZnO promoting charge separation. The antibacterial activity was also evaluated for the ZnO (bulk) and EG/Se-ZnO nanocomposite against the control (ciprofloxacin) and zone of inhibition observed was on E. coli and E.cloacae respectively depicted that EG/Se-ZnO was more effective on E. coli relatively to bulk ZnO. Thus, EG/Se-ZnO nanocomposite can be used for photocatalytic organic pollutant degradation.
Keywords
Nanocomposite; Photocatalyst; Photodegradation; Graphite; Selenium-Zinc oxide; Methylene blue
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