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Assessment of clean H2 energy production from water using novel silicon photocatalyst

Nanosheets of silicon have attracted a great deal of attention due to its tunable optical and electronic properties. However, the development of facile and easily scalable synthesis process has remained a great contest. Endeavor has been made in this research to find a waste inferred effective pho...

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Main Authors: Aminul Islam, Teo, Siow Hwa, Md. Rabiul Awual, Yun Hin Taufiq-Yap
Format: Article
Language:English
English
Published: Elsevier LTD 2020
Subjects:
Q Science (General)
QC Physics
Online Access:https://eprints.ums.edu.my/id/eprint/26841/1/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel%20abstract.pdf
https://eprints.ums.edu.my/id/eprint/26841/2/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel.pdf
https://eprints.ums.edu.my/id/eprint/26841/
https://doi.org/10.1016/j.jclepro.2019.118805
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spelling my.ums.eprints.268412021-04-28T07:39:19Z https://eprints.ums.edu.my/id/eprint/26841/ Assessment of clean H2 energy production from water using novel silicon photocatalyst Aminul Islam Teo, Siow Hwa Md. Rabiul Awual Yun Hin Taufiq-Yap Q Science (General) QC Physics Nanosheets of silicon have attracted a great deal of attention due to its tunable optical and electronic properties. However, the development of facile and easily scalable synthesis process has remained a great contest. Endeavor has been made in this research to find a waste inferred effective photocatalyst to deliver hydrogen (H2) through visible light responsive water splitting. One-pot solid phase reaction was applied to synthesis catalyst and adopted ultrathin structure. The photocatalytic efficiency of catalyst was examined by XRD, XPS, and UVeVIS absorption spectra, PL, FESEM, HRTEM and EDX. The HRTEM and FESEM images revealed the interconnected nanosheets with Si having the average thickness of 5 nm and their band gaps were 2.3e2.5 eV corresponding to the absorption of visible light range. The H2 production rate on photocatalyst was originated to 3200 mmol h�1 without utilizing any conciliatory electron givers, voltage or pH alteration, which beats the Pt, Ru, Rh, Pd and Au stacked photocatalyst ever detailed up until this point. The significant increase in photocatalytic activity could be the fast charge migration and separation from the silicon-hydrogen and siliconhydroxyl bonds on Si surface and facilitation of charge separation could results from the multiple reflections of visible light on ultrathin nanosheets. It has been confirmed that the electron/hole recombination rate in ultrathin nanosheets of Si declined due to the oxidation of Si surface. It would be presumed that the approach of surface chemistry of silicon could not be limited towards the photocatalytic water splitting and could be applicable to remedy water pollution. Elsevier LTD 2020 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/26841/1/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel%20abstract.pdf text en https://eprints.ums.edu.my/id/eprint/26841/2/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel.pdf Aminul Islam and Teo, Siow Hwa and Md. Rabiul Awual and Yun Hin Taufiq-Yap (2020) Assessment of clean H2 energy production from water using novel silicon photocatalyst. Journal of Cleaner Production, 244. ISSN 0959-6526 (Submitted) https://doi.org/10.1016/j.jclepro.2019.118805
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Aminul Islam
Teo, Siow Hwa
Md. Rabiul Awual
Yun Hin Taufiq-Yap
Assessment of clean H2 energy production from water using novel silicon photocatalyst
description Nanosheets of silicon have attracted a great deal of attention due to its tunable optical and electronic properties. However, the development of facile and easily scalable synthesis process has remained a great contest. Endeavor has been made in this research to find a waste inferred effective photocatalyst to deliver hydrogen (H2) through visible light responsive water splitting. One-pot solid phase reaction was applied to synthesis catalyst and adopted ultrathin structure. The photocatalytic efficiency of catalyst was examined by XRD, XPS, and UVeVIS absorption spectra, PL, FESEM, HRTEM and EDX. The HRTEM and FESEM images revealed the interconnected nanosheets with Si having the average thickness of 5 nm and their band gaps were 2.3e2.5 eV corresponding to the absorption of visible light range. The H2 production rate on photocatalyst was originated to 3200 mmol h�1 without utilizing any conciliatory electron givers, voltage or pH alteration, which beats the Pt, Ru, Rh, Pd and Au stacked photocatalyst ever detailed up until this point. The significant increase in photocatalytic activity could be the fast charge migration and separation from the silicon-hydrogen and siliconhydroxyl bonds on Si surface and facilitation of charge separation could results from the multiple reflections of visible light on ultrathin nanosheets. It has been confirmed that the electron/hole recombination rate in ultrathin nanosheets of Si declined due to the oxidation of Si surface. It would be presumed that the approach of surface chemistry of silicon could not be limited towards the photocatalytic water splitting and could be applicable to remedy water pollution.
format Article
author Aminul Islam
Teo, Siow Hwa
Md. Rabiul Awual
Yun Hin Taufiq-Yap
author_facet Aminul Islam
Teo, Siow Hwa
Md. Rabiul Awual
Yun Hin Taufiq-Yap
author_sort Aminul Islam
title Assessment of clean H2 energy production from water using novel silicon photocatalyst
title_short Assessment of clean H2 energy production from water using novel silicon photocatalyst
title_full Assessment of clean H2 energy production from water using novel silicon photocatalyst
title_fullStr Assessment of clean H2 energy production from water using novel silicon photocatalyst
title_full_unstemmed Assessment of clean H2 energy production from water using novel silicon photocatalyst
title_sort assessment of clean h2 energy production from water using novel silicon photocatalyst
publisher Elsevier LTD
publishDate 2020
url https://eprints.ums.edu.my/id/eprint/26841/1/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel%20abstract.pdf
https://eprints.ums.edu.my/id/eprint/26841/2/Assessment%20of%20clean%20H2%20energy%20production%20from%20water%20using%20novel.pdf
https://eprints.ums.edu.my/id/eprint/26841/
https://doi.org/10.1016/j.jclepro.2019.118805
_version_ 1760230550403022848
score 13.211869

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