Staff View: Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater

Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater

Environmental pollution is creating serious risks to both human health and the atmosphere which has been a major threat on a global scale. Therefore, it is necessary to focus on the evolution of the environment and trace contaminants for effective and reliable detection and degradation methods. Phot...

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Main Authors:	Veerabaghu, Poornima Parvathi, Ramasamy, Parimaladevi, Sathe, Vasant, Mahalingam, Umadevi, Mahalingam, Anuratha, Sagadevan, Suresh
Format:	Article
Published:	Elsevier 2024
Subjects:	Q Science (General) QD Chemistry
Online Access:	http://eprints.um.edu.my/46949/ https://doi.org/10.1016/j.jallcom.2024.174690
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spelling	my.um.eprints.469492025-01-13T01:40:20Z http://eprints.um.edu.my/46949/ Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater Veerabaghu, Poornima Parvathi Ramasamy, Parimaladevi Sathe, Vasant Mahalingam, Umadevi Mahalingam, Anuratha Sagadevan, Suresh Q Science (General) QD Chemistry Environmental pollution is creating serious risks to both human health and the atmosphere which has been a major threat on a global scale. Therefore, it is necessary to focus on the evolution of the environment and trace contaminants for effective and reliable detection and degradation methods. Photochemical methods such as Surface-Enhanced Raman Scattering (SERS) and sono-catalytic degradation can be used to accelerate the detection and degradation of toxic dyes. In the present work, a Gold/Titania/Graphene oxide nanocomposite (ATG) was investigated as a capable dual substrate for SERS sensing and sono-catalytic degradation of pollutants. The nanosize distribution (6 - 12 nm) of ATG was synthesized by a solvothermal route. X-ray diffraction pattern illustrates the anatase phase of the titanium dioxide. Sonocatalytic degradation was aided using Raman spectroscopy. The effectiveness of ATG as a sono-catalytic substrate and SERS sensor was first evaluated using commercial dyes, such as malachite green and Bismarck brown. Furthermore, research has been conducted on the harmful elements in textile effluents (TE). The N — N and C -N bands found in the SERS spectra of TE indicates the presence of carcinogenic azo -dye impurities. The enhancement factor was observed to be 5 .77 x 10 12 with the limit of detection (LOD) as 6 .0 x 10 - 12 M . Additionally, the sono-catalysis of ATG was evaluated for the elimination of these dye pollutants in TE. Following sono-catalysis by ATG, a high degradation rate constant of approximately 8.44 x10 - 3 /min was noted in TE with 89 % of degradation efficiency. The enhanced SERS detection, sono-catalytic degradation of synthetic dyes and effluent stem from the combined action of ` plasmonic characteristics of Au NPs, anatase TiO 2 , and the pi- pi stacking characteristic of GO. Elsevier 2024-08 Article PeerReviewed Veerabaghu, Poornima Parvathi and Ramasamy, Parimaladevi and Sathe, Vasant and Mahalingam, Umadevi and Mahalingam, Anuratha and Sagadevan, Suresh (2024) Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater. Journal of Alloys and Compounds, 994. p. 174690. ISSN 0925-8388, DOI https://doi.org/10.1016/j.jallcom.2024.174690 <https://doi.org/10.1016/j.jallcom.2024.174690>. https://doi.org/10.1016/j.jallcom.2024.174690 10.1016/j.jallcom.2024.174690
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	Q Science (General) QD Chemistry
spellingShingle	Q Science (General) QD Chemistry Veerabaghu, Poornima Parvathi Ramasamy, Parimaladevi Sathe, Vasant Mahalingam, Umadevi Mahalingam, Anuratha Sagadevan, Suresh Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
description	Environmental pollution is creating serious risks to both human health and the atmosphere which has been a major threat on a global scale. Therefore, it is necessary to focus on the evolution of the environment and trace contaminants for effective and reliable detection and degradation methods. Photochemical methods such as Surface-Enhanced Raman Scattering (SERS) and sono-catalytic degradation can be used to accelerate the detection and degradation of toxic dyes. In the present work, a Gold/Titania/Graphene oxide nanocomposite (ATG) was investigated as a capable dual substrate for SERS sensing and sono-catalytic degradation of pollutants. The nanosize distribution (6 - 12 nm) of ATG was synthesized by a solvothermal route. X-ray diffraction pattern illustrates the anatase phase of the titanium dioxide. Sonocatalytic degradation was aided using Raman spectroscopy. The effectiveness of ATG as a sono-catalytic substrate and SERS sensor was first evaluated using commercial dyes, such as malachite green and Bismarck brown. Furthermore, research has been conducted on the harmful elements in textile effluents (TE). The N — N and C -N bands found in the SERS spectra of TE indicates the presence of carcinogenic azo -dye impurities. The enhancement factor was observed to be 5 .77 x 10 12 with the limit of detection (LOD) as 6 .0 x 10 - 12 M . Additionally, the sono-catalysis of ATG was evaluated for the elimination of these dye pollutants in TE. Following sono-catalysis by ATG, a high degradation rate constant of approximately 8.44 x10 - 3 /min was noted in TE with 89 % of degradation efficiency. The enhanced SERS detection, sono-catalytic degradation of synthetic dyes and effluent stem from the combined action of ` plasmonic characteristics of Au NPs, anatase TiO 2 , and the pi- pi stacking characteristic of GO.
format	Article
author	Veerabaghu, Poornima Parvathi Ramasamy, Parimaladevi Sathe, Vasant Mahalingam, Umadevi Mahalingam, Anuratha Sagadevan, Suresh
author_facet	Veerabaghu, Poornima Parvathi Ramasamy, Parimaladevi Sathe, Vasant Mahalingam, Umadevi Mahalingam, Anuratha Sagadevan, Suresh
author_sort	Veerabaghu, Poornima Parvathi
title	Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
title_short	Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
title_full	Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
title_fullStr	Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
title_full_unstemmed	Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
title_sort	nano-architected titania/gold@go nanosheets for sonocatalytic degradation of azo dyes in textile wastewater
publisher	Elsevier
publishDate	2024
url	http://eprints.um.edu.my/46949/ https://doi.org/10.1016/j.jallcom.2024.174690
_version_	1821105743262121984
score	13.244413

Nano-architected titania/gold@GO nanosheets for sonocatalytic degradation of azo dyes in textile wastewater

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