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Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors

Fabricating montmorillonite (Mt) dispersed Ag/pCN-TiO2 heterojunction for stimulating photocatalytic H2 evolution using two/three phases photo-reactor systems has been investigated. Using Ag–Mt/pCN–TiO2 composite in three-phase, H2 rate of 667 μmolh−1 was obtained, much greater than TiO2-based sampl...

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Main Authors: Fajrina, N., Tahir, M.
Format: Article
Published: Elsevier Ltd. 2020
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/87090/
http://www.dx.doi.org/10.1016/j.ijhydene.2019.11.194
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spelling my.utm.870902020-10-31T12:23:22Z http://eprints.utm.my/id/eprint/87090/ Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors Fajrina, N. Tahir, M. TP Chemical technology Fabricating montmorillonite (Mt) dispersed Ag/pCN-TiO2 heterojunction for stimulating photocatalytic H2 evolution using two/three phases photo-reactor systems has been investigated. Using Ag–Mt/pCN–TiO2 composite in three-phase, H2 rate of 667 μmolh−1 was obtained, much greater than TiO2-based samples due to superior charges separation with Ag SPR and Mt mediated effect. Among parameters, 0.15 g catalyst loading at pH 7 gives highest H2 yield with glycerol sacrificial reagents. More interestingly, liquid system with glycerol gave best H2 rate while gas-phase with methanol encouraged H2 productivity. Furthermore, H2 rate increased to 8230 μmolh−1 using two-phase monolith reactor, 9.01 and 12.34 times greater than two-phase fixed-bed and three-phase slurry systems. Comparatively, highest AQY and SY of 39.85% and 54.86 μmolh−1cm−3 were obtained using monolith. This superior efficiency was due to efficient photon-flux consumption, effective mass-transfer and large light-fluxed. These findings would be fruitful for further development for clean hydrogen production through photocatalytic water splitting. Elsevier Ltd. 2020-02 Article PeerReviewed Fajrina, N. and Tahir, M. (2020) Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors. International Journal of Hydrogen Energy, 45 (7). pp. 4355-4375. ISSN 0360-3199 http://www.dx.doi.org/10.1016/j.ijhydene.2019.11.194 DOI: 10.1016/j.ijhydene.2019.11.194
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
Fajrina, N.
Tahir, M.
Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
description Fabricating montmorillonite (Mt) dispersed Ag/pCN-TiO2 heterojunction for stimulating photocatalytic H2 evolution using two/three phases photo-reactor systems has been investigated. Using Ag–Mt/pCN–TiO2 composite in three-phase, H2 rate of 667 μmolh−1 was obtained, much greater than TiO2-based samples due to superior charges separation with Ag SPR and Mt mediated effect. Among parameters, 0.15 g catalyst loading at pH 7 gives highest H2 yield with glycerol sacrificial reagents. More interestingly, liquid system with glycerol gave best H2 rate while gas-phase with methanol encouraged H2 productivity. Furthermore, H2 rate increased to 8230 μmolh−1 using two-phase monolith reactor, 9.01 and 12.34 times greater than two-phase fixed-bed and three-phase slurry systems. Comparatively, highest AQY and SY of 39.85% and 54.86 μmolh−1cm−3 were obtained using monolith. This superior efficiency was due to efficient photon-flux consumption, effective mass-transfer and large light-fluxed. These findings would be fruitful for further development for clean hydrogen production through photocatalytic water splitting.
format Article
author Fajrina, N.
Tahir, M.
author_facet Fajrina, N.
Tahir, M.
author_sort Fajrina, N.
title Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
title_short Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
title_full Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
title_fullStr Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
title_full_unstemmed Monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
title_sort monolithic ag-mt dispersed z-scheme pcn-tio2 heterojunction for dynamic photocatalytic h2 evolution using liquid and gas phase photoreactors
publisher Elsevier Ltd.
publishDate 2020
url http://eprints.utm.my/id/eprint/87090/
http://www.dx.doi.org/10.1016/j.ijhydene.2019.11.194
_version_ 1683230701224198144
score 13.211869

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