Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst
The effects of a-Fe2O3/NiS2 composite for the humic acid removal were systematically studied and compared with the synthesized a-Fe2O3 and NiS2. The obtained mesoporous composite has a stacked plate-like surface, active at a visible light region with a bandgap of 2.49 eV, and has a lower rate of rec...
Saved in:
Main Authors: | , , , , , , , , |
---|---|
Format: | Article |
Published: |
Elsevier Ltd
2021
|
Subjects: | |
Online Access: | http://eprints.utm.my/id/eprint/95819/ http://dx.doi.org/10.1016/j.jece.2021.105682 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Universiti Teknologi Malaysia |
id |
my.utm.95819 |
---|---|
record_format |
eprints |
spelling |
my.utm.958192022-05-31T13:19:39Z http://eprints.utm.my/id/eprint/95819/ Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst Mohtar, Safia Syazana Aziz, Farhana Mohamad Nor, Ahmad Rizam Mohammed, Abdussamad Mukhtar Mhamad, Shakhawan Ahmad Jaafar, Juhana Yusof, Norhaniza Wan Salleh, Wan Norharyati Ismail, Ahmad Fauzi TP Chemical technology The effects of a-Fe2O3/NiS2 composite for the humic acid removal were systematically studied and compared with the synthesized a-Fe2O3 and NiS2. The obtained mesoporous composite has a stacked plate-like surface, active at a visible light region with a bandgap of 2.49 eV, and has a lower rate of recombination compared to the a-Fe2O3 but higher than the NiS2. The highest humic acid removal (93.7%) was achieved by the a-Fe2O3/NiS2 composite followed by the a-Fe2O3 (88.7%) and NiS2 (86.4%) at optimum conditions of 0.1 g L-1 catalyst loading, pH 5, and 30 mg L-1 initial humic acid concentration. The mineralization achieved 96.8% and the catalyst was stable up to the fourth cycle. These encouraging results were due to the better adsorption capacity of the composite, being active in visible light, and quenching of the photoluminescence that led to effective separation of subsequent reduction in the rate of recombination of the charged carriers. Elsevier Ltd 2021 Article PeerReviewed Mohtar, Safia Syazana and Aziz, Farhana and Mohamad Nor, Ahmad Rizam and Mohammed, Abdussamad Mukhtar and Mhamad, Shakhawan Ahmad and Jaafar, Juhana and Yusof, Norhaniza and Wan Salleh, Wan Norharyati and Ismail, Ahmad Fauzi (2021) Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst. Journal of Environmental Chemical Engineering, 9 (4). p. 105682. ISSN 2213-3437 http://dx.doi.org/10.1016/j.jece.2021.105682 |
institution |
Universiti Teknologi Malaysia |
building |
UTM Library |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Teknologi Malaysia |
content_source |
UTM Institutional Repository |
url_provider |
http://eprints.utm.my/ |
topic |
TP Chemical technology |
spellingShingle |
TP Chemical technology Mohtar, Safia Syazana Aziz, Farhana Mohamad Nor, Ahmad Rizam Mohammed, Abdussamad Mukhtar Mhamad, Shakhawan Ahmad Jaafar, Juhana Yusof, Norhaniza Wan Salleh, Wan Norharyati Ismail, Ahmad Fauzi Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
description |
The effects of a-Fe2O3/NiS2 composite for the humic acid removal were systematically studied and compared with the synthesized a-Fe2O3 and NiS2. The obtained mesoporous composite has a stacked plate-like surface, active at a visible light region with a bandgap of 2.49 eV, and has a lower rate of recombination compared to the a-Fe2O3 but higher than the NiS2. The highest humic acid removal (93.7%) was achieved by the a-Fe2O3/NiS2 composite followed by the a-Fe2O3 (88.7%) and NiS2 (86.4%) at optimum conditions of 0.1 g L-1 catalyst loading, pH 5, and 30 mg L-1 initial humic acid concentration. The mineralization achieved 96.8% and the catalyst was stable up to the fourth cycle. These encouraging results were due to the better adsorption capacity of the composite, being active in visible light, and quenching of the photoluminescence that led to effective separation of subsequent reduction in the rate of recombination of the charged carriers. |
format |
Article |
author |
Mohtar, Safia Syazana Aziz, Farhana Mohamad Nor, Ahmad Rizam Mohammed, Abdussamad Mukhtar Mhamad, Shakhawan Ahmad Jaafar, Juhana Yusof, Norhaniza Wan Salleh, Wan Norharyati Ismail, Ahmad Fauzi |
author_facet |
Mohtar, Safia Syazana Aziz, Farhana Mohamad Nor, Ahmad Rizam Mohammed, Abdussamad Mukhtar Mhamad, Shakhawan Ahmad Jaafar, Juhana Yusof, Norhaniza Wan Salleh, Wan Norharyati Ismail, Ahmad Fauzi |
author_sort |
Mohtar, Safia Syazana |
title |
Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
title_short |
Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
title_full |
Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
title_fullStr |
Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
title_full_unstemmed |
Photocatalytic degradation of humic acid using a novel visible-light active α-Fe2O3/NiS2 composite photocatalyst |
title_sort |
photocatalytic degradation of humic acid using a novel visible-light active α-fe2o3/nis2 composite photocatalyst |
publisher |
Elsevier Ltd |
publishDate |
2021 |
url |
http://eprints.utm.my/id/eprint/95819/ http://dx.doi.org/10.1016/j.jece.2021.105682 |
_version_ |
1735386851156426752 |