Zinc oxide@citric acid-modified graphitic carbon nitride nanocomposites for adsorption and photocatalytic degradation of perfluorooctanoic acid

Navidpour, AH; Safaei, J; Johir, MAH; Ni, BJ; Dashti, A; Li, X; Zhou, JL

Zinc oxide@citric acid-modified graphitic carbon nitride nanocomposites for adsorption and photocatalytic degradation of perfluorooctanoic acid

Navidpour, AH Safaei, J Johir, MAH Ni, BJ Dashti, A Li, X Zhou, JL

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Publisher:: SPRINGERNATURE
Publication Type:: Journal Article
Citation:: Advanced Composites and Hybrid Materials, 2024, 7, (2)
Issue Date:: 2024-04-01

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Field	Value	Language
dc.contributor.author	Navidpour, AH
dc.contributor.author	Safaei, J
dc.contributor.author	Johir, MAH
dc.contributor.author	Ni, BJ
dc.contributor.author	Dashti, A
dc.contributor.author	Li, X
dc.contributor.author	Zhou, JL
dc.date.accessioned	2024-04-29T02:57:13Z
dc.date.available	2024-04-29T02:57:13Z
dc.date.issued	2024-04-01
dc.identifier.citation	Advanced Composites and Hybrid Materials, 2024, 7, (2)
dc.identifier.issn	2522-0128
dc.identifier.issn	2522-0136
dc.identifier.uri	http://hdl.handle.net/10453/178443
dc.description.abstract	Perfluorooctanoic acid (PFOA) is a highly persistent organic pollutant of global concern. A novel nanocomposite composed of ZnO nanoparticles and citric acid-modified g-C3N4 was synthesized by ball milling process. The synthesized nanocomposite was more efficient than pure ball-milled ZnO nanoparticles for PFOA elimination under visible light irradiation. The optimal hybrid photocatalyst, produced by the addition of 5 wt% of citric acid-modified g-C3N4, demonstrated significantly better performance for PFOA removal than pure ZnO nanoparticles under UV irradiation, with the apparent rate constants of 0.468 h−1 and 0.097 h−1, respectively. The addition of peroxymonosulfate (0.53 g L−1) significantly increased PFOA removal, clarifying the crucial effect of sulfate radicals on PFOA photodegradation. In comparison, citric acid-modified g-C3N4 was not effective for PFOA elimination under visible light irradiation, even with the addition of peroxymonosulfate. Further experiments under dark conditions identified surface adsorption on hybrid photocatalyst as a key process in total PFOA removal. In summary, PFOA removal by ZnO@citric acid-modified graphitic carbon nitride nanocomposites is due to the combined action from adsorption and photodegradation, with adsorption as the dominating mechanism.
dc.language	English
dc.publisher	SPRINGERNATURE
dc.relation.ispartof	Advanced Composites and Hybrid Materials
dc.relation.isbasedon	10.1007/s42114-024-00867-w
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Zinc oxide@citric acid-modified graphitic carbon nitride nanocomposites for adsorption and photocatalytic degradation of perfluorooctanoic acid
dc.type	Journal Article
utslib.citation.volume	7
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/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	University of Technology Sydney/Strength - CGT - Centre for Green Technology
utslib.copyright.status	open_access	*
dc.date.updated	2024-04-29T02:57:11Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	7
utslib.citation.issue	2

Abstract:

Perfluorooctanoic acid (PFOA) is a highly persistent organic pollutant of global concern. A novel nanocomposite composed of ZnO nanoparticles and citric acid-modified g-C3N4 was synthesized by ball milling process. The synthesized nanocomposite was more efficient than pure ball-milled ZnO nanoparticles for PFOA elimination under visible light irradiation. The optimal hybrid photocatalyst, produced by the addition of 5 wt% of citric acid-modified g-C3N4, demonstrated significantly better performance for PFOA removal than pure ZnO nanoparticles under UV irradiation, with the apparent rate constants of 0.468 h−1 and 0.097 h−1, respectively. The addition of peroxymonosulfate (0.53 g L−1) significantly increased PFOA removal, clarifying the crucial effect of sulfate radicals on PFOA photodegradation. In comparison, citric acid-modified g-C3N4 was not effective for PFOA elimination under visible light irradiation, even with the addition of peroxymonosulfate. Further experiments under dark conditions identified surface adsorption on hybrid photocatalyst as a key process in total PFOA removal. In summary, PFOA removal by ZnO@citric acid-modified graphitic carbon nitride nanocomposites is due to the combined action from adsorption and photodegradation, with adsorption as the dominating mechanism.

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http://hdl.handle.net/10453/178443