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

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

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Official URL: http://dx.doi.org/10.3390/nano9121767

Abstract

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.

Item Type:Article
Uncontrolled Keywords:Carbon nanotubes, Hydrogen production
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:89560
Deposited By: Widya Wahid
Deposited On:22 Feb 2021 10:20
Last Modified:22 Feb 2021 10:20

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