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Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations

Photocatalytic H2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO2 was developed for photocatalytic H2 production u...

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Main Authors: Shezad, Nasir, Maafa, Ibrahim M., Johari, Khairiraihanna, Hafeez, Ainy, Akhter, Parveen, Shabir, Maira, Raza, Ali, Anjum, Hirra, Hussain, Murid, Tahir, Muhammad
Format: Article
Language:English
Published: MDPI AG 2019
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TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/89560/1/MuhammadTahir2019_CarbonNanotubesIncorporatedZ-SchemeAssembly.pdf
http://eprints.utm.my/id/eprint/89560/
http://dx.doi.org/10.3390/nano9121767
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spelling my.utm.895602021-02-22T02:20:31Z http://eprints.utm.my/id/eprint/89560/ Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations Shezad, Nasir Maafa, Ibrahim M. Johari, Khairiraihanna Hafeez, Ainy Akhter, Parveen Shabir, Maira Raza, Ali Anjum, Hirra Hussain, Murid Tahir, Muhammad TP Chemical technology Photocatalytic H2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO2 was developed for photocatalytic H2 production under visible light irradiations. Synthesized photocatalysts were characterized through transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FTIR), photoluminescence spectra (PL), Brunauer Emmet-Teller(BET), and UV-vis spectroscopy analysis techniques. The composite photocatalysts exhibited a H2 production of 477 ppm which was three-folds higher than that produced by TiO2. The good performance was attributed to the strong interaction of three components and the reduced charge recombination, which was 89 and 56.3 times lower than the TiO2 and AgBr/TiO2. Furthermore, the role of surface acidic and basic groups was assessed and the photocatalytic results demonstrated the importance of surface functional groups. In addition, the composites exhibited stability and reusability for five consecutive cycles of reaction. Thus, improved performance of the photocatalyst was credited to the CNTs as an electron mediator, surface functional groups, higher surface area, enhanced charge separation and extended visible light absorption edge. This work provides new development of Z-scheme photocatalysts for sustainable H2 production. MDPI AG 2019-12 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/89560/1/MuhammadTahir2019_CarbonNanotubesIncorporatedZ-SchemeAssembly.pdf Shezad, Nasir and Maafa, Ibrahim M. and Johari, Khairiraihanna and Hafeez, Ainy and Akhter, Parveen and Shabir, Maira and Raza, Ali and Anjum, Hirra and Hussain, Murid and Tahir, Muhammad (2019) Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations. Nanomaterials, 9 (12). p. 1767. ISSN 2079-4991 http://dx.doi.org/10.3390/nano9121767
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/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Shezad, Nasir
Maafa, Ibrahim M.
Johari, Khairiraihanna
Hafeez, Ainy
Akhter, Parveen
Shabir, Maira
Raza, Ali
Anjum, Hirra
Hussain, Murid
Tahir, Muhammad
Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
description Photocatalytic H2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO2 was developed for photocatalytic H2 production under visible light irradiations. Synthesized photocatalysts were characterized through transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FTIR), photoluminescence spectra (PL), Brunauer Emmet-Teller(BET), and UV-vis spectroscopy analysis techniques. The composite photocatalysts exhibited a H2 production of 477 ppm which was three-folds higher than that produced by TiO2. The good performance was attributed to the strong interaction of three components and the reduced charge recombination, which was 89 and 56.3 times lower than the TiO2 and AgBr/TiO2. Furthermore, the role of surface acidic and basic groups was assessed and the photocatalytic results demonstrated the importance of surface functional groups. In addition, the composites exhibited stability and reusability for five consecutive cycles of reaction. Thus, improved performance of the photocatalyst was credited to the CNTs as an electron mediator, surface functional groups, higher surface area, enhanced charge separation and extended visible light absorption edge. This work provides new development of Z-scheme photocatalysts for sustainable H2 production.
format Article
author Shezad, Nasir
Maafa, Ibrahim M.
Johari, Khairiraihanna
Hafeez, Ainy
Akhter, Parveen
Shabir, Maira
Raza, Ali
Anjum, Hirra
Hussain, Murid
Tahir, Muhammad
author_facet Shezad, Nasir
Maafa, Ibrahim M.
Johari, Khairiraihanna
Hafeez, Ainy
Akhter, Parveen
Shabir, Maira
Raza, Ali
Anjum, Hirra
Hussain, Murid
Tahir, Muhammad
author_sort Shezad, Nasir
title Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
title_short Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
title_full Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
title_fullStr Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
title_full_unstemmed Carbon nanotubes incorporated Z-scheme assembly of AgBr/TiO2 for photocatalytic hydrogen production under visible light irradiations
title_sort carbon nanotubes incorporated z-scheme assembly of agbr/tio2 for photocatalytic hydrogen production under visible light irradiations
publisher MDPI AG
publishDate 2019
url http://eprints.utm.my/id/eprint/89560/1/MuhammadTahir2019_CarbonNanotubesIncorporatedZ-SchemeAssembly.pdf
http://eprints.utm.my/id/eprint/89560/
http://dx.doi.org/10.3390/nano9121767
_version_ 1692991797571092480
score 13.211869

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