Open Access
Langmuir, volume 34, issue 25, pages 7334-7345
Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles
Shortell Matthew P
1
,
Zhang Chao
1
,
Popov Zakhar
2
,
Sorokin Pavel B.
2
,
Bourgeois Laure
3
,
Waclawik E.R.
1
,
Golberg Dmitri
1, 4
3
Monash Centre for Electron Microscopy, Department of Materials Science and Engineering, Monash University, Melbourne, Victoria 3800, Australia
|
Publication type: Journal Article
Publication date: 2018-05-29
Spectroscopy
Electrochemistry
Condensed Matter Physics
General Materials Science
Surfaces and Interfaces
Abstract
Metal-semiconductor hybrid nanomaterials are becoming increasingly popular for photocatalytic degradation of organic pollutants. Herein, a seed-assisted photodeposition approach is put forward for the site-specific growth of Pt on Au-ZnO particles (Pt-Au-ZnO). A similar approach was also utilized to enlarge the Au nanoparticles at epitaxial Au-ZnO particles (Au@Au-ZnO). An epitaxial connection at the Au-ZnO interface was found to be critical for the site-specific deposition of Pt or Au. Light on-off photocatalysis tests, utilizing a thiazine dye (toluidine blue) as a model organic compound, were conducted and confirmed the superior photodegradation properties of Pt-Au-ZnO hybrids compared to Au-ZnO. In contrast, Au-ZnO type hybrids were more effective toward photoreduction of toluidine blue to leuco-toluidine blue. It was deemed that photoexcited electrons of Au-ZnO (Au, ∼5 nm) possessed high reducing power owing to electron accumulation and negative shift in Fermi level/redox potential; however, exciton recombination due to possible Fermi-level equilibration slowed down the complete degradation of toluidine blue. In the case of Au@Au-ZnO (Au, ∼15 nm), the photodegradation efficiency was enhanced and the photoreduction rate reduced compared to Au-ZnO. Pt-Au-ZnO hybrids showed better photodegradation and mineralization properties compared to both Au-ZnO and Au@Au-ZnO owing to a fast electron discharge (i.e. better electron-hole seperation). However, photoexcited electrons lacked the reducing power for the photoreduction of toluidine blue. The ultimate photodegradation efficiencies of Pt-Au-ZnO, Au@Au-ZnO, and Au-ZnO were 84, 66, and 39%, respectively. In the interest of effective metal-semiconductor type photocatalysts, the present study points out the importance of choosing the right metal, depending on whether a photoreduction and/or photodegradation process is desired.
Citations by journals
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3
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Citations by publishers
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2
4
6
8
10
12
14
16
18
20
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Elsevier
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19 publications, 44.19%
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Springer Nature
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4 publications, 9.3%
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Wiley
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4 publications, 9.3%
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American Chemical Society (ACS)
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4 publications, 9.3%
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Royal Society of Chemistry (RSC)
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4 publications, 9.3%
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1 publication, 2.33%
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1 publication, 2.33%
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King Saud University
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1 publication, 2.33%
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Taylor & Francis
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Taylor & Francis
1 publication, 2.33%
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Electrochemical Science Group, University of Belgrade
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Electrochemical Science Group, University of Belgrade, 1, 2.33%
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1 publication, 2.33%
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World Scientific
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World Scientific
1 publication, 2.33%
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Walter de Gruyter
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Walter de Gruyter
1 publication, 2.33%
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2
4
6
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10
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18
20
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Fernando J. F. S. et al. Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles // Langmuir. 2018. Vol. 34. No. 25. pp. 7334-7345.
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Fernando J. F. S., Shortell M. P., Firestein K. L., Zhang C., Larionov K. V., Popov Z., Sorokin P. B., Bourgeois L., Waclawik E., Golberg D. Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles // Langmuir. 2018. Vol. 34. No. 25. pp. 7334-7345.
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RIS
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TY - JOUR
DO - 10.1021/acs.langmuir.8b00401
UR - https://doi.org/10.1021%2Facs.langmuir.8b00401
TI - Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles
T2 - Langmuir
AU - Shortell, Matthew P
AU - Fernando, Joseph F S
AU - Zhang, Chao
AU - Larionov, Konstantin V.
AU - Sorokin, Pavel B.
AU - Golberg, Dmitri
AU - Firestein, Konstantin L
AU - Popov, Zakhar
AU - Bourgeois, Laure
AU - Waclawik, E.R.
PY - 2018
DA - 2018/05/29 00:00:00
PB - American Chemical Society (ACS)
SP - 7334-7345
IS - 25
VL - 34
SN - 0743-7463
SN - 1520-5827
ER -
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@article{2018_Fernando,
author = {Matthew P Shortell and Joseph F S Fernando and Chao Zhang and Konstantin V. Larionov and Pavel B. Sorokin and Dmitri Golberg and Konstantin L Firestein and Zakhar Popov and Laure Bourgeois and E.R. Waclawik},
title = {Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles},
journal = {Langmuir},
year = {2018},
volume = {34},
publisher = {American Chemical Society (ACS)},
month = {may},
url = {https://doi.org/10.1021%2Facs.langmuir.8b00401},
number = {25},
pages = {7334--7345},
doi = {10.1021/acs.langmuir.8b00401}
}
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MLA
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Fernando, Joseph F. S., et al. “Photocatalysis with Pt-Au-ZnO and Au-ZnO Hybrids: Effect of Charge Accumulation and Discharge Properties of Metal Nanoparticles.” Langmuir, vol. 34, no. 25, May. 2018, pp. 7334-7345. https://doi.org/10.1021%2Facs.langmuir.8b00401.