IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]

In this study, a reversed photodeposition method was developed to minimise the use of noble metals (NM) as doping agents for photocatalytic enhancement, addressing the high cost associated with commercialisation. Unlike the conventional approach where NM is doped onto titanium dioxide (TiO2) before...

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Published in:Malaysian Journal of Analytical Sciences
Main Author: Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
Format: Article
Language:English
Published: Malaysian Society of Analytical Sciences 2024
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210238568&partnerID=40&md5=cc5752448d2bab270e4bea04bc21a0bd
id 2-s2.0-85210238568
spelling 2-s2.0-85210238568
Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
2024
Malaysian Journal of Analytical Sciences
28
5

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210238568&partnerID=40&md5=cc5752448d2bab270e4bea04bc21a0bd
In this study, a reversed photodeposition method was developed to minimise the use of noble metals (NM) as doping agents for photocatalytic enhancement, addressing the high cost associated with commercialisation. Unlike the conventional approach where NM is doped onto titanium dioxide (TiO2) before immobilisation, this method involves doping NM on the surface of immobilised TiO2. The immobilisation was achieved through a dip-coating method using a coating solution containing Degussa P-25 TiO2, epoxidised natural rubber (ENR-50) and polyvinyl chloride (PVC) as the polymer binder. This study focused on doping silver (Ag) on TiO2/ENR/PVC to form ATEP plates. Doping was carried out at different concentrations (100-500 ppm) using both reversed (R) and normal (N) approaches, with photodeposition times ranging from 1 to 6 hours. The photocatalytic performance of the immobilised ATEP(R) and ATEP(N) was determined through the photodegradation of 12 mg L-1 methylene blue (MB) dye. X-ray diffraction (XRD) analysis revealed that the etching of ENR/PVC in the reversed method exposed more TiO2 crystals. Field emission scanning electron microscopy (FESEM) images also proved that the polymer etching resulted in a more porous TiO2 structure in the reversed method. Energy-dispersive X-ray spectroscopy (EDX) confirmed that the reversed method achieved a higher weight percentage of Ag, which enhanced the surface plasmonic resonance (SPR) effect and improved photocatalytic performance. The optimal sample, 300-ATEP(R 5h), exhibited a higher rate constant (k = 0.0495 min-1) than the 400-ATEP(N) (k = 0.0463 min-1) sample over 60 minutes of MB dye degradation. This was due to the more porous TiO2 structure and the stronger SPR effect of Ag in the reversed sample. The Ag concentration was effectively reduced by half while achieving greater photocatalytic performance in 300-ATEP(R 5h) than in 400-ATEP(N). The photocatalytic performance of the samples produced using the reversed method surpassed that of the normal method, with the optimal sample maintaining stability over six cycles. © 2024, Malaysian Society of Analytical Sciences. All rights reserved.
Malaysian Society of Analytical Sciences
13942506
English
Article

author Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
spellingShingle Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
author_facet Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
author_sort Zanal N.I.N.; Ghani N.I.A.; Hamzah S.R.; Mustapha N.H.; Halim O.M.A.; Nazua N.; Roslan N.I.; Ahmad Z.; Abdullah M.F.; Wan Ismail W.I.N.
title IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
title_short IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
title_full IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
title_fullStr IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
title_full_unstemmed IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
title_sort IMMOBILISED Ag-TiO2/ENR/PVC USING REVERSED PHOTODEPOSITION METHOD FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE DYE; [(Ag-TiO2/ENR/PVC yang Dipegunkan dengan Menggunakan Kaedah Foto Pendepositan Terbalik untuk Degradasi Foto Pemangkinan Pewarna Metilena Biru)]
publishDate 2024
container_title Malaysian Journal of Analytical Sciences
container_volume 28
container_issue 5
doi_str_mv
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85210238568&partnerID=40&md5=cc5752448d2bab270e4bea04bc21a0bd
description In this study, a reversed photodeposition method was developed to minimise the use of noble metals (NM) as doping agents for photocatalytic enhancement, addressing the high cost associated with commercialisation. Unlike the conventional approach where NM is doped onto titanium dioxide (TiO2) before immobilisation, this method involves doping NM on the surface of immobilised TiO2. The immobilisation was achieved through a dip-coating method using a coating solution containing Degussa P-25 TiO2, epoxidised natural rubber (ENR-50) and polyvinyl chloride (PVC) as the polymer binder. This study focused on doping silver (Ag) on TiO2/ENR/PVC to form ATEP plates. Doping was carried out at different concentrations (100-500 ppm) using both reversed (R) and normal (N) approaches, with photodeposition times ranging from 1 to 6 hours. The photocatalytic performance of the immobilised ATEP(R) and ATEP(N) was determined through the photodegradation of 12 mg L-1 methylene blue (MB) dye. X-ray diffraction (XRD) analysis revealed that the etching of ENR/PVC in the reversed method exposed more TiO2 crystals. Field emission scanning electron microscopy (FESEM) images also proved that the polymer etching resulted in a more porous TiO2 structure in the reversed method. Energy-dispersive X-ray spectroscopy (EDX) confirmed that the reversed method achieved a higher weight percentage of Ag, which enhanced the surface plasmonic resonance (SPR) effect and improved photocatalytic performance. The optimal sample, 300-ATEP(R 5h), exhibited a higher rate constant (k = 0.0495 min-1) than the 400-ATEP(N) (k = 0.0463 min-1) sample over 60 minutes of MB dye degradation. This was due to the more porous TiO2 structure and the stronger SPR effect of Ag in the reversed sample. The Ag concentration was effectively reduced by half while achieving greater photocatalytic performance in 300-ATEP(R 5h) than in 400-ATEP(N). The photocatalytic performance of the samples produced using the reversed method surpassed that of the normal method, with the optimal sample maintaining stability over six cycles. © 2024, Malaysian Society of Analytical Sciences. All rights reserved.
publisher Malaysian Society of Analytical Sciences
issn 13942506
language English
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