Staff View: Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Metallic Ag nanoparticles (Ag0) were successfully activated using a direct in situ electrochemical method before being supported on TiO2. Catalytic testing showed that 5 wt% Ag–TiO2 gave the highest photodegradation (94%) of 50 mg L-1 2-chlorophenol (2-CP) at pH 5 using 0.375 g L-1 catalyst within 6...

Full description

Saved in:

Bibliographic Details
Main Authors:	Jaafar, N. F., Jalil, A. A., Triwahyono, Sugeng, Efendi, J., Mukti, R. R., Jusoh, R., Che Jusoh, N. W., Karim, A. F., M. Salleh, N. F., Suendo, V.
Format:	Article
Published:	Elsevier Ltd. 2015
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/58313/ http://doi.org/10.1016/j.apsusc.2015.02.106
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.utm.58313
record_format	eprints
spelling	my.utm.583132021-08-01T01:35:29Z http://eprints.utm.my/id/eprint/58313/ Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity Jaafar, N. F. Jalil, A. A. Triwahyono, Sugeng Efendi, J. Mukti, R. R. Jusoh, R. Che Jusoh, N. W. Karim, A. F. M. Salleh, N. F. Suendo, V. QD Chemistry Metallic Ag nanoparticles (Ag0) were successfully activated using a direct in situ electrochemical method before being supported on TiO2. Catalytic testing showed that 5 wt% Ag–TiO2 gave the highest photodegradation (94%) of 50 mg L-1 2-chlorophenol (2-CP) at pH 5 using 0.375 g L-1 catalyst within 6 h, while under similar conditions, 1 wt% and 10 wt% Ag–TiO2 only gave 75% and 78% degradation, respectively. Characterization results illustrated that the photoactivity was affected by the amount of Ag0 and oxygen vacancies which act as an electrons trap to enhance the electron–hole separation. While, the Agsingle bondOsingle bondTi bonds formation reduced the photoactivity. The degradation followed a pseudo-first order Langmuir–Hinshelwood model where adsorption was the controlling step. Study on the effect of scavengers showed that the hole (H+) and hydroxyl radical (OHradical dot) play important roles in the photodegradation. The regenerated photocatalyst was still stable after five cycling runs. Elsevier Ltd. 2015 Article PeerReviewed Jaafar, N. F. and Jalil, A. A. and Triwahyono, Sugeng and Efendi, J. and Mukti, R. R. and Jusoh, R. and Che Jusoh, N. W. and Karim, A. F. and M. Salleh, N. F. and Suendo, V. (2015) Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity. Applied Surface Science, 338 . pp. 75-84. ISSN 0169-4332 http://doi.org/10.1016/j.apsusc.2015.02.106 DOI:10.1016/j.apsusc.2015.02.106
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	QD Chemistry
spellingShingle	QD Chemistry Jaafar, N. F. Jalil, A. A. Triwahyono, Sugeng Efendi, J. Mukti, R. R. Jusoh, R. Che Jusoh, N. W. Karim, A. F. M. Salleh, N. F. Suendo, V. Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
description	Metallic Ag nanoparticles (Ag0) were successfully activated using a direct in situ electrochemical method before being supported on TiO2. Catalytic testing showed that 5 wt% Ag–TiO2 gave the highest photodegradation (94%) of 50 mg L-1 2-chlorophenol (2-CP) at pH 5 using 0.375 g L-1 catalyst within 6 h, while under similar conditions, 1 wt% and 10 wt% Ag–TiO2 only gave 75% and 78% degradation, respectively. Characterization results illustrated that the photoactivity was affected by the amount of Ag0 and oxygen vacancies which act as an electrons trap to enhance the electron–hole separation. While, the Agsingle bondOsingle bondTi bonds formation reduced the photoactivity. The degradation followed a pseudo-first order Langmuir–Hinshelwood model where adsorption was the controlling step. Study on the effect of scavengers showed that the hole (H+) and hydroxyl radical (OHradical dot) play important roles in the photodegradation. The regenerated photocatalyst was still stable after five cycling runs.
format	Article
author	Jaafar, N. F. Jalil, A. A. Triwahyono, Sugeng Efendi, J. Mukti, R. R. Jusoh, R. Che Jusoh, N. W. Karim, A. F. M. Salleh, N. F. Suendo, V.
author_facet	Jaafar, N. F. Jalil, A. A. Triwahyono, Sugeng Efendi, J. Mukti, R. R. Jusoh, R. Che Jusoh, N. W. Karim, A. F. M. Salleh, N. F. Suendo, V.
author_sort	Jaafar, N. F.
title	Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
title_short	Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
title_full	Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
title_fullStr	Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
title_full_unstemmed	Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity
title_sort	direct in situ activation of ag-0 nanoparticles in synthesis of ag/tio2 and its photoactivity
publisher	Elsevier Ltd.
publishDate	2015
url	http://eprints.utm.my/id/eprint/58313/ http://doi.org/10.1016/j.apsusc.2015.02.106
_version_	1707765840761323520
score	13.211869

Direct in situ activation of Ag-0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Similar Items