Persulfate assisted photocatalytic and antibacterial activity of TiO2-CuO coupled with graphene oxide and reduced graphene oxide.

Thambiliyagodage, C; Liyanaarachchi, H; Jayanetti, M; Ekanayake, G; Mendis, A; Samarakoon, U; Vigneswaran, S

Persulfate assisted photocatalytic and antibacterial activity of TiO2-CuO coupled with graphene oxide and reduced graphene oxide.

Thambiliyagodage, C Liyanaarachchi, H Jayanetti, M Ekanayake, G Mendis, A Samarakoon, U Vigneswaran, S

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Publisher:: Springer Nature
Publication Type:: Journal Article
Citation:: Sci Rep, 2024, 14, (1), pp. 12505
Issue Date:: 2024-05-31

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Field	Value	Language
dc.contributor.author	Thambiliyagodage, C
dc.contributor.author	Liyanaarachchi, H
dc.contributor.author	Jayanetti, M
dc.contributor.author	Ekanayake, G
dc.contributor.author	Mendis, A
dc.contributor.author	Samarakoon, U
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322
dc.date.accessioned	2024-08-01T04:46:54Z
dc.date.available	2024-05-29
dc.date.available	2024-08-01T04:46:54Z
dc.date.issued	2024-05-31
dc.identifier.citation	Sci Rep, 2024, 14, (1), pp. 12505
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/179965
dc.description.abstract	Photocatalysts of TiO2-CuO coupled with 30% graphene oxide (GO) were hydrothermally fabricated, which varied the TiO2 to CuO weight ratios to 1:4, 1:2, 1:1, 2:1 and 4:1 and reduced to form TiO2-CuO/reduced graphene oxide (rGO) photocatalysts. They were characterized using XRD, TEM, SEM, XPS, Raman, and DRS technologies. TiO2-CuO composites and TiO2-CuO/GO degrade methylene blue when persulfate ions are present. Persulfate concentration ranged from 1, 2, 4 to 8 mmol/dm-3 in which the highest activity of 4.4 × 10-2 and 7.35 × 10-2 min-1 was obtained with 4 mmol/dm-3 for TiO2-CuO (1:4) and TiO2-CuO/GO (1:1), respectively. The presence of EDTA and isopropyl alcohol reduced the photodegradation. TiO2-CuO coupled with rGO coagulates methylene blue in the presence of persulfate ions and such coagulation is independent of light. The catalyst dosage and the concentration of the dye were varied for the best-performing samples. The antibacterial activity of the synthesized samples was evaluated against the growth of Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Klebsiella pneumonia. Ti:Cu (1:2)-GO and Ti:Cu (1:4)-GO had the highest antibacterial activity against K. pneumoniae (16.08 ± 0.14 mm), P. aeruginosa (22.33 ± 0.58 mm), E. coli (16.17 ± 0.29 mm) and S. aureus (16.08 ± 0.88).
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Nature
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/s41598-024-63452-7
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.mesh	Graphite
dc.subject.mesh	Titanium
dc.subject.mesh	Copper
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Methylene Blue
dc.subject.mesh	Escherichia coli
dc.subject.mesh	Staphylococcus aureus
dc.subject.mesh	Photolysis
dc.subject.mesh	Sulfates
dc.subject.mesh	Escherichia coli
dc.subject.mesh	Staphylococcus aureus
dc.subject.mesh	Sulfates
dc.subject.mesh	Graphite
dc.subject.mesh	Copper
dc.subject.mesh	Titanium
dc.subject.mesh	Methylene Blue
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Photolysis
dc.subject.mesh	Graphite
dc.subject.mesh	Titanium
dc.subject.mesh	Copper
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Methylene Blue
dc.subject.mesh	Escherichia coli
dc.subject.mesh	Staphylococcus aureus
dc.subject.mesh	Photolysis
dc.subject.mesh	Sulfates
dc.title	Persulfate assisted photocatalytic and antibacterial activity of TiO2-CuO coupled with graphene oxide and reduced graphene oxide.
dc.type	Journal Article
utslib.citation.volume	14
utslib.location.activity	England
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2024-08-01T04:46:43Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	14
utslib.citation.issue	1

Abstract:

Photocatalysts of TiO2-CuO coupled with 30% graphene oxide (GO) were hydrothermally fabricated, which varied the TiO2 to CuO weight ratios to 1:4, 1:2, 1:1, 2:1 and 4:1 and reduced to form TiO2-CuO/reduced graphene oxide (rGO) photocatalysts. They were characterized using XRD, TEM, SEM, XPS, Raman, and DRS technologies. TiO2-CuO composites and TiO2-CuO/GO degrade methylene blue when persulfate ions are present. Persulfate concentration ranged from 1, 2, 4 to 8 mmol/dm-3 in which the highest activity of 4.4 × 10-2 and 7.35 × 10-2 min-1 was obtained with 4 mmol/dm-3 for TiO2-CuO (1:4) and TiO2-CuO/GO (1:1), respectively. The presence of EDTA and isopropyl alcohol reduced the photodegradation. TiO2-CuO coupled with rGO coagulates methylene blue in the presence of persulfate ions and such coagulation is independent of light. The catalyst dosage and the concentration of the dye were varied for the best-performing samples. The antibacterial activity of the synthesized samples was evaluated against the growth of Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Klebsiella pneumonia. Ti:Cu (1:2)-GO and Ti:Cu (1:4)-GO had the highest antibacterial activity against K. pneumoniae (16.08 ± 0.14 mm), P. aeruginosa (22.33 ± 0.58 mm), E. coli (16.17 ± 0.29 mm) and S. aureus (16.08 ± 0.88).

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http://hdl.handle.net/10453/179965