Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A

Modernization and urbanization have adversely affected water quality and harmed the sustainability of water sources. Bisphenol A (BPA) has been identified as an endocrine-disrupting compound that, when exposed to the human body, can interfere with the hormone system and cause severe health effects a...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohammad Jafri, Nurul Natasha
Format:	Thesis
Language:	English
Published:	2022
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/101797/1/NurulNatashaMohammadJafriMSChE2022.pdf.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.101797
record_format	uketd_dc
spelling	my-utm-ep.1017972023-07-09T02:26:24Z Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A 2022 Mohammad Jafri, Nurul Natasha TP Chemical technology Modernization and urbanization have adversely affected water quality and harmed the sustainability of water sources. Bisphenol A (BPA) has been identified as an endocrine-disrupting compound that, when exposed to the human body, can interfere with the hormone system and cause severe health effects and disorders. Titanium dioxide (TiO2), a prevalently used semiconductor in photocatalytic degradation fields, has wide bandgap energy and a low specific surface area. These properties can lead to a decline in photocatalytic degradation performance. The template synthesis approach can be used to produce hollow nanofibers photocatalysts with a large surface area, a narrow bandgap, and excellent degradation capability. This process, however, yields powder-form photocatalysts that require post-recovery treatment before being recycled in a photocatalytic slurry system. In this study, TiO2 hollow nanofibers (THNFs) were developed at various calcination temperatures. THNFs produced at 600 °C (THNF600) produced nanofibers with the best hollow morphology, with a bandgap of 3.0 eV, with a specific surface area of 81.2776 m2/g, and mixed-phase of 24.2 % anatase and 75.8 % rutile. As a result of the large surface area and excellent optical properties, the THNFs exhibited the highest BPA degradation of 71.48%. This result was also significantly better than that of Degussa P25, a commercial TiO2, with BPA degrades at only 38.62%. Using THNF600, the optimum photocatalysts dosage, pH, and initial BPA concentration were determined to be 0.75 g/L, pH 4.1, and 10 ppm, respectively. Then, the powderform THNF600 was assembled into a free-standing form using chemical treatment and vacuum filtration technique. Free-standing THNFs containing 0.75 g of THNF600 (FS75-THNFs) exhibited good adherence and connectivity between the nanofibers. After five cycles of reaction, the THNF600 experienced an average of 14.38% catalyst loss. The recyclability of FS75-THNFs outperformed the THNF600 which gave 5% average catalyst loss from its original weight while maintaining excellent degradation performance. In conclusion, this study recommends the potential application of freestanding TiO2 hollow nanofibers as the high potential novel photocatalysts for the treatment of BPA in wastewater. 2022 Thesis http://eprints.utm.my/id/eprint/101797/ http://eprints.utm.my/id/eprint/101797/1/NurulNatashaMohammadJafriMSChE2022.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:149307 masters Universiti Teknologi Malaysia Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mohammad Jafri, Nurul Natasha Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
description	Modernization and urbanization have adversely affected water quality and harmed the sustainability of water sources. Bisphenol A (BPA) has been identified as an endocrine-disrupting compound that, when exposed to the human body, can interfere with the hormone system and cause severe health effects and disorders. Titanium dioxide (TiO2), a prevalently used semiconductor in photocatalytic degradation fields, has wide bandgap energy and a low specific surface area. These properties can lead to a decline in photocatalytic degradation performance. The template synthesis approach can be used to produce hollow nanofibers photocatalysts with a large surface area, a narrow bandgap, and excellent degradation capability. This process, however, yields powder-form photocatalysts that require post-recovery treatment before being recycled in a photocatalytic slurry system. In this study, TiO2 hollow nanofibers (THNFs) were developed at various calcination temperatures. THNFs produced at 600 °C (THNF600) produced nanofibers with the best hollow morphology, with a bandgap of 3.0 eV, with a specific surface area of 81.2776 m2/g, and mixed-phase of 24.2 % anatase and 75.8 % rutile. As a result of the large surface area and excellent optical properties, the THNFs exhibited the highest BPA degradation of 71.48%. This result was also significantly better than that of Degussa P25, a commercial TiO2, with BPA degrades at only 38.62%. Using THNF600, the optimum photocatalysts dosage, pH, and initial BPA concentration were determined to be 0.75 g/L, pH 4.1, and 10 ppm, respectively. Then, the powderform THNF600 was assembled into a free-standing form using chemical treatment and vacuum filtration technique. Free-standing THNFs containing 0.75 g of THNF600 (FS75-THNFs) exhibited good adherence and connectivity between the nanofibers. After five cycles of reaction, the THNF600 experienced an average of 14.38% catalyst loss. The recyclability of FS75-THNFs outperformed the THNF600 which gave 5% average catalyst loss from its original weight while maintaining excellent degradation performance. In conclusion, this study recommends the potential application of freestanding TiO2 hollow nanofibers as the high potential novel photocatalysts for the treatment of BPA in wastewater.
format	Thesis
qualification_level	Master's degree
author	Mohammad Jafri, Nurul Natasha
author_facet	Mohammad Jafri, Nurul Natasha
author_sort	Mohammad Jafri, Nurul Natasha
title	Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
title_short	Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
title_full	Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
title_fullStr	Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
title_full_unstemmed	Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A
title_sort	free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol a
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2022
url	http://eprints.utm.my/id/eprint/101797/1/NurulNatashaMohammadJafriMSChE2022.pdf.pdf
_version_	1776100773878300672

Free standing titanium dioxide hollow nanofibers for photocatalytic degradation of bisphenol A

Similar Items