Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]

Solar photoelectrochemical (PEC) water splitting for hydrogen production is a clean, eco-friendly, and cost-effective technology that uses solar light as the energy source. Metal oxides, such as TiO2, are preferable as a photoanode in PEC water splitting as they have relatively high reactivity, stab...

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Published in:Malaysian Journal of Analytical Sciences
Main Author: Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
Format: Article
Language:English
Published: Malaysian Society of Analytical Sciences 2018
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057164714&doi=10.17576%2fmjas-2018-2205-02&partnerID=40&md5=ca994bce5e3c40b2b4249c162c81976b
id 2-s2.0-85057164714
spelling 2-s2.0-85057164714
Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
2018
Malaysian Journal of Analytical Sciences
22
5
10.17576/mjas-2018-2205-02
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057164714&doi=10.17576%2fmjas-2018-2205-02&partnerID=40&md5=ca994bce5e3c40b2b4249c162c81976b
Solar photoelectrochemical (PEC) water splitting for hydrogen production is a clean, eco-friendly, and cost-effective technology that uses solar light as the energy source. Metal oxides, such as TiO2, are preferable as a photoanode in PEC water splitting as they have relatively high reactivity, stable in aqueous solution, and cheaper than non-oxide semiconductors. However, TiO2 has a large band gap (3.2 eV) that only allows it to be active upon irradiation with UV light. Thus, gold nanoparticles were deposited onto TiO2 nanotubes (TNT) in this study to extend their spectral response to the visible region. Gold deposited titanium dioxide nanotubes (AuTNT) were synthesized by using pulse electrodeposition. Electrodeposition was carried out in 0.5 M H2SO4 that contained different concentrations (50, 100, 500, and 1,000 µM) of gold solution, with 75% duty cycle and an applied potential of-0.4 V for 20 minutes in a three-electrode electrochemical cell. The TNTs were annealed at 500 °C for 2 hours to induce crystallinity prior to gold deposition. The physicochemical properties of the AuTNT were characterised using a Field Emission Scanning Electron Microscope (FESEM), an Energy Dispersive X-ray (EDX), and an X-ray Diffractometer (XRD). Photoelectrochemical properties of AuTNT electrode was evaluated in 0.5 M Na2SO4 and 2 M C2H5OH under the illumination of a halogen lamp. The AuTNT electrode prepared with 500 µM gold solution demonstrated the highest photocurrent compared to other concentrations of gold. © 2018, Malaysian Society of Analytical Sciences. All rights reserved.
Malaysian Society of Analytical Sciences
13942506
English
Article
All Open Access; Gold Open Access
author Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
spellingShingle Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
author_facet Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
author_sort Binti Ismail S.S.; Zain Z.M.; Ayal A.K.; Chin L.Y.
title Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
title_short Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
title_full Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
title_fullStr Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
title_full_unstemmed Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
title_sort Effect of gold solution concentration on the formation and photoelectrochemical properties of gold deposited titanium dioxide nanotubes; [Kesan kepekatan larutan emas terhadap pembentukan dan sifat-sifat fotoelektrokimia nanotiub titanium dioksida terendap emas]
publishDate 2018
container_title Malaysian Journal of Analytical Sciences
container_volume 22
container_issue 5
doi_str_mv 10.17576/mjas-2018-2205-02
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057164714&doi=10.17576%2fmjas-2018-2205-02&partnerID=40&md5=ca994bce5e3c40b2b4249c162c81976b
description Solar photoelectrochemical (PEC) water splitting for hydrogen production is a clean, eco-friendly, and cost-effective technology that uses solar light as the energy source. Metal oxides, such as TiO2, are preferable as a photoanode in PEC water splitting as they have relatively high reactivity, stable in aqueous solution, and cheaper than non-oxide semiconductors. However, TiO2 has a large band gap (3.2 eV) that only allows it to be active upon irradiation with UV light. Thus, gold nanoparticles were deposited onto TiO2 nanotubes (TNT) in this study to extend their spectral response to the visible region. Gold deposited titanium dioxide nanotubes (AuTNT) were synthesized by using pulse electrodeposition. Electrodeposition was carried out in 0.5 M H2SO4 that contained different concentrations (50, 100, 500, and 1,000 µM) of gold solution, with 75% duty cycle and an applied potential of-0.4 V for 20 minutes in a three-electrode electrochemical cell. The TNTs were annealed at 500 °C for 2 hours to induce crystallinity prior to gold deposition. The physicochemical properties of the AuTNT were characterised using a Field Emission Scanning Electron Microscope (FESEM), an Energy Dispersive X-ray (EDX), and an X-ray Diffractometer (XRD). Photoelectrochemical properties of AuTNT electrode was evaluated in 0.5 M Na2SO4 and 2 M C2H5OH under the illumination of a halogen lamp. The AuTNT electrode prepared with 500 µM gold solution demonstrated the highest photocurrent compared to other concentrations of gold. © 2018, Malaysian Society of Analytical Sciences. All rights reserved.
publisher Malaysian Society of Analytical Sciences
issn 13942506
language English
format Article
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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