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Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater

Seyed Mohammad Matin Ahmadi, Mary Larimi Orcid Logo, Ali Akbar Asgharinezhad Orcid Logo, Farhad Khorasheh Orcid Logo, Cyrus Ghotbi Orcid Logo

ACS Omega, Volume: 9, Issue: 52, Pages: 51320 - 51336

Swansea University Author: Mary Larimi Orcid Logo

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DOI (Published version): 10.1021/acsomega.4c08137

Abstract

We present a novel approach for enhancing photocatalytic efficiency by developing polyaniline (PANI) and polyindole (PIN)-coated TiO2 nanotubes (TNT) through a combination of chemical oxidation and hydrothermal processes. The PANI–PIN coating was systematically applied to both the internal and exter...

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Published in: ACS Omega
ISSN: 2470-1343
Published: American Chemical Society (ACS) 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa68463
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spelling 2025-02-04T15:37:43.0400465 v2 68463 2024-12-04 Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater db028d01b9d62d39518f147f6bb08fa5 0000-0001-5566-171X Mary Larimi Mary Larimi true false 2024-12-04 EAAS We present a novel approach for enhancing photocatalytic efficiency by developing polyaniline (PANI) and polyindole (PIN)-coated TiO2 nanotubes (TNT) through a combination of chemical oxidation and hydrothermal processes. The PANI–PIN coating was systematically applied to both the internal and external surfaces of the nanotubes to enhance the photocatalytic active sites and optimize pollutant adsorption. The dual-coated structure enhances the interaction with pollutants, facilitating a more efficient degradation of 4-nitrophenol (4-NP) when exposed to visible light. Thorough characterization through X-ray diffraction (XRD), Fourier-transform infrared (FTIR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), N2-physisorption, transient photocurrent, diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) validated the exceptional structural and optical properties of the composite. The PANI/PIN polymer coating effectively inhibited electron–hole recombination, leading to a notable enhancement in photocatalytic performance. Among the tested composites, the formulation consisting of 75% PANI and 25% PIN demonstrated remarkable performance, achieving a degradation rate of 99.46% for 4-NP in only 120 min of exposure to visible light. The impressive efficiency stems from its extensive surface area (255.3 m2/g), efficient charge separation, minimized band gap (2.77 eV), and improved light absorption. Moreover, the composite demonstrated remarkable recyclability, preserving its catalytic activity across five cycles without any decline in performance. These results demonstrate the strong potential of 75%PPTN as a promising photocatalyst for environmental remediation. Journal Article ACS Omega 9 52 51320 51336 American Chemical Society (ACS) 2470-1343 31 12 2024 2024-12-31 10.1021/acsomega.4c08137 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University SU Library paid the OA fee (TA Institutional Deal) Swansea University 2025-02-04T15:37:43.0400465 2024-12-04T13:56:01.7726128 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Seyed Mohammad Matin Ahmadi 1 Mary Larimi 0000-0001-5566-171X 2 Ali Akbar Asgharinezhad 0000-0002-3183-680X 3 Farhad Khorasheh 0000-0002-8477-4753 4 Cyrus Ghotbi 0000-0002-1963-1238 5 68463__33496__746b1dfc835c4c5194ed9583eb106316.pdf 68463.VOR.pdf 2025-02-04T14:26:34.7870461 Output 11867979 application/pdf Version of Record true © 2024 The Authors. This article is licensed under CC-BY 4.0. true eng https://creativecommons.org/licenses/by/4.0/
title Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
spellingShingle Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
Mary Larimi
title_short Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
title_full Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
title_fullStr Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
title_full_unstemmed Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
title_sort Inside- and outside-Coated PANI and/or PIN-TiO Nanotubes for Enhanced Photocatalytic Degradation of 4-Nitrophenol in Wastewater
author_id_str_mv db028d01b9d62d39518f147f6bb08fa5
author_id_fullname_str_mv db028d01b9d62d39518f147f6bb08fa5_***_Mary Larimi
author Mary Larimi
author2 Seyed Mohammad Matin Ahmadi
Mary Larimi
Ali Akbar Asgharinezhad
Farhad Khorasheh
Cyrus Ghotbi
format Journal article
container_title ACS Omega
container_volume 9
container_issue 52
container_start_page 51320
publishDate 2024
institution Swansea University
issn 2470-1343
doi_str_mv 10.1021/acsomega.4c08137
publisher American Chemical Society (ACS)
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description We present a novel approach for enhancing photocatalytic efficiency by developing polyaniline (PANI) and polyindole (PIN)-coated TiO2 nanotubes (TNT) through a combination of chemical oxidation and hydrothermal processes. The PANI–PIN coating was systematically applied to both the internal and external surfaces of the nanotubes to enhance the photocatalytic active sites and optimize pollutant adsorption. The dual-coated structure enhances the interaction with pollutants, facilitating a more efficient degradation of 4-nitrophenol (4-NP) when exposed to visible light. Thorough characterization through X-ray diffraction (XRD), Fourier-transform infrared (FTIR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), N2-physisorption, transient photocurrent, diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) validated the exceptional structural and optical properties of the composite. The PANI/PIN polymer coating effectively inhibited electron–hole recombination, leading to a notable enhancement in photocatalytic performance. Among the tested composites, the formulation consisting of 75% PANI and 25% PIN demonstrated remarkable performance, achieving a degradation rate of 99.46% for 4-NP in only 120 min of exposure to visible light. The impressive efficiency stems from its extensive surface area (255.3 m2/g), efficient charge separation, minimized band gap (2.77 eV), and improved light absorption. Moreover, the composite demonstrated remarkable recyclability, preserving its catalytic activity across five cycles without any decline in performance. These results demonstrate the strong potential of 75%PPTN as a promising photocatalyst for environmental remediation.
published_date 2024-12-31T07:27:29Z
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