Facile synthesis and characterization of anatase TiO<inf>2</inf>/g-CN composites for enhanced photoactivity under UV–visible spectrum

Hossain, SM; Park, H; Kang, HJ; Mun, JS; Tijing, L; Rhee, I; Kim, JH; Jun, YS; Shon, HK

Facile synthesis and characterization of anatase TiO<inf>2</inf>/g-CN composites for enhanced photoactivity under UV–visible spectrum

Hossain, SM Park, H Kang, HJ Mun, JS Tijing, L

Rhee, I Kim, JH Jun, YS Shon, HK

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Chemosphere, 2021, 262, pp. 128004-128004
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Hossain, SM
dc.contributor.author	Park, H
dc.contributor.author	Kang, HJ
dc.contributor.author	Mun, JS
dc.contributor.author	Tijing, L https://orcid.org/0000-0001-9398-6355
dc.contributor.author	Rhee, I
dc.contributor.author	Kim, JH
dc.contributor.author	Jun, YS
dc.contributor.author	Shon, HK
dc.date.accessioned	2020-09-07T08:40:16Z
dc.date.available	2020-09-07T08:40:16Z
dc.date.issued	2021-01-01
dc.identifier.citation	Chemosphere, 2021, 262, pp. 128004-128004
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/142564
dc.description.abstract	© 2020 Elsevier Ltd For the purpose of atmospheric NO removal, anatase TiO2/g-CN photocatalytic composites were prepared by using a facile template-free calcination route in atmospheric conditions. Considerably fiscal NP400 and laboratory-grade melamine were used as the precursor of the composites. Additionally, samples were prepared with different wt. ratios of TiO2 and melamine by using two distinct calcination temperatures (550 °C/600 °C). The morphological attributes of the composites were assessed with X-ray diffraction, scanning and transmission electron microscopy, infrared spectroscopy, and X-ray photoelectron spectroscopy. Additionally, the optical traits were evaluated and compared using UV–visible diffuse reflectance spectroscopy and photoluminescence analysis. Finally, the photodegradation potentials for atmospheric NO by using the as-prepared composites were assessed under both UV and visible light irradiation. All the composites showed superior NO oxidation compared to NP400 and bulk g-CN. For the composites prepared by using the calcination temperature of 550 °C, the maximum NO removal was observed when the NP400 to melamine ratio was 1:2, irrespective of the utilized light irradiation type. Whereas for increased calcination temperature (600 °C), the maximum NO removal was observed at the precursor mix ratio of 1:3 (NP400:melamine). Successfully narrowed energy bandgaps were perceived in the as-prepared composites. Moreover, a subsequent drop in NO2 generation during NO oxidation was observed under both UV and visible light irradiation. Interestingly, higher calcination temperature during the synthesis of the catalysts has shown a significant drop in NO2 generation during the photodegradation of NO.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	Photo & Environmental Technology Co., Ltd
dc.relation	Bentech Frontier Co., Ltd
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2020.128004
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.classification	Environmental Sciences
dc.title	Facile synthesis and characterization of anatase TiO<inf>2</inf>/g-CN composites for enhanced photoactivity under UV–visible spectrum
dc.type	Journal Article
utslib.citation.volume	262
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
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
utslib.copyright.status	open_access	*
dc.date.updated	2020-09-07T08:40:10Z
pubs.publication-status	Accepted
pubs.volume	262

Abstract:

© 2020 Elsevier Ltd For the purpose of atmospheric NO removal, anatase TiO2/g-CN photocatalytic composites were prepared by using a facile template-free calcination route in atmospheric conditions. Considerably fiscal NP400 and laboratory-grade melamine were used as the precursor of the composites. Additionally, samples were prepared with different wt. ratios of TiO2 and melamine by using two distinct calcination temperatures (550 °C/600 °C). The morphological attributes of the composites were assessed with X-ray diffraction, scanning and transmission electron microscopy, infrared spectroscopy, and X-ray photoelectron spectroscopy. Additionally, the optical traits were evaluated and compared using UV–visible diffuse reflectance spectroscopy and photoluminescence analysis. Finally, the photodegradation potentials for atmospheric NO by using the as-prepared composites were assessed under both UV and visible light irradiation. All the composites showed superior NO oxidation compared to NP400 and bulk g-CN. For the composites prepared by using the calcination temperature of 550 °C, the maximum NO removal was observed when the NP400 to melamine ratio was 1:2, irrespective of the utilized light irradiation type. Whereas for increased calcination temperature (600 °C), the maximum NO removal was observed at the precursor mix ratio of 1:3 (NP400:melamine). Successfully narrowed energy bandgaps were perceived in the as-prepared composites. Moreover, a subsequent drop in NO2 generation during NO oxidation was observed under both UV and visible light irradiation. Interestingly, higher calcination temperature during the synthesis of the catalysts has shown a significant drop in NO2 generation during the photodegradation of NO.

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http://hdl.handle.net/10453/142564