Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak

The organic dyes from the textile industry released to the water body might result in environmental effects which these dyes are high toxicity and non-biodegradability that must be treated using the photocatalysis process to degrade organic compounds into harmless chemicals. Therefore, several modif...

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Main Author:	Che Razak, Nurfarhanah Nadzira
Format:	Thesis
Language:	English
Published:	2022
Subjects:	Radiation chemistry Photochemistry
Online Access:	https://ir.uitm.edu.my/id/eprint/59280/1/59280.pdf
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id	my-uitm-ir.59280
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spelling	my-uitm-ir.592802022-11-02T03:49:42Z Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak 2022-10-27 Che Razak, Nurfarhanah Nadzira Radiation chemistry Photochemistry The organic dyes from the textile industry released to the water body might result in environmental effects which these dyes are high toxicity and non-biodegradability that must be treated using the photocatalysis process to degrade organic compounds into harmless chemicals. Therefore, several modifications have been approaches to reduce the Eg and electron-hole recombination like doping with Ag, since Ag indicates a beneficial influence on photocatalytic activity. In this work, titanium dioxide (TiO2) was used in the photocatalysis process as a semiconductor due to its unique properties and has less effective under visible light irradiation. Doping with Ag, can reduced photogenerated electron-hole pair recombination, hence enhancing the photocatalytic activity of TiO2. The 3 wt% of Ag on TiO2 (Ag doped TiO2) was prepared by photo deposition method prior immobilization to study the mineralization of 12 mgL-1 RR4 dye under photodegradation using 55 W fluorescent lamp up to 480 mins (8 hrs) irradiation time. TiO2 was coated onto double-sided adhesive tape (DSAT) by using brush technique on glass plate 10 x 1.5 x 0.2 cm (L x H x B) as support material. The diffraction angles obtained in immobilized Ag-doped TiO2 was aligned with TiO2 based on JCPDS card no: 21-1276 with additional peaks appears at 32.7, 35.3, 38.2° representing the peaks for Ag2O. The hydroxyl bonding was observed at 1600-1800 cm-1and the peak detected at 700-900 cm-1 indicates Ag-O vibration which scrutinized by FTIR analysis. The acquired results from FESEM-EDX indicated the presence of 0.6% Ag on the Ag doped TiO2 photocatalyst. Ag doped TiO2 has shown an excellent mineralization process where a complete mineralization was achieved at 480 minutes as compared to unmodified TiO2 which ca. 64.77% COD remained at same irradiation time. Also, the immobilized Ag doped TiO2 is durable with sustain of its photocatalytic performance which able to perform the same photocatalytic activities up to 10 cycles. 2022-10 Thesis https://ir.uitm.edu.my/id/eprint/59280/ https://ir.uitm.edu.my/id/eprint/59280/1/59280.pdf text en public degree Universiti Teknologi Mara Perlis Faculty of Applied Science
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	Radiation chemistry Photochemistry
spellingShingle	Radiation chemistry Photochemistry Che Razak, Nurfarhanah Nadzira Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
description	The organic dyes from the textile industry released to the water body might result in environmental effects which these dyes are high toxicity and non-biodegradability that must be treated using the photocatalysis process to degrade organic compounds into harmless chemicals. Therefore, several modifications have been approaches to reduce the Eg and electron-hole recombination like doping with Ag, since Ag indicates a beneficial influence on photocatalytic activity. In this work, titanium dioxide (TiO2) was used in the photocatalysis process as a semiconductor due to its unique properties and has less effective under visible light irradiation. Doping with Ag, can reduced photogenerated electron-hole pair recombination, hence enhancing the photocatalytic activity of TiO2. The 3 wt% of Ag on TiO2 (Ag doped TiO2) was prepared by photo deposition method prior immobilization to study the mineralization of 12 mgL-1 RR4 dye under photodegradation using 55 W fluorescent lamp up to 480 mins (8 hrs) irradiation time. TiO2 was coated onto double-sided adhesive tape (DSAT) by using brush technique on glass plate 10 x 1.5 x 0.2 cm (L x H x B) as support material. The diffraction angles obtained in immobilized Ag-doped TiO2 was aligned with TiO2 based on JCPDS card no: 21-1276 with additional peaks appears at 32.7, 35.3, 38.2° representing the peaks for Ag2O. The hydroxyl bonding was observed at 1600-1800 cm-1and the peak detected at 700-900 cm-1 indicates Ag-O vibration which scrutinized by FTIR analysis. The acquired results from FESEM-EDX indicated the presence of 0.6% Ag on the Ag doped TiO2 photocatalyst. Ag doped TiO2 has shown an excellent mineralization process where a complete mineralization was achieved at 480 minutes as compared to unmodified TiO2 which ca. 64.77% COD remained at same irradiation time. Also, the immobilized Ag doped TiO2 is durable with sustain of its photocatalytic performance which able to perform the same photocatalytic activities up to 10 cycles.
format	Thesis
qualification_level	Bachelor degree
author	Che Razak, Nurfarhanah Nadzira
author_facet	Che Razak, Nurfarhanah Nadzira
author_sort	Che Razak, Nurfarhanah Nadzira
title	Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
title_short	Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
title_full	Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
title_fullStr	Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
title_full_unstemmed	Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak
title_sort	mineralization study of the reactive red-4 [rr4] dye under photodegradation via immobilized silver [ag] tio2 photocatalyst / nurfarhanah nadzira che razak
granting_institution	Universiti Teknologi Mara Perlis
granting_department	Faculty of Applied Science
publishDate	2022
url	https://ir.uitm.edu.my/id/eprint/59280/1/59280.pdf
_version_	1783735024496934912

Mineralization study of the reactive red-4 [RR4] dye under photodegradation via immobilized silver [Ag] TiO2 photocatalyst / Nurfarhanah Nadzira Che Razak

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