Photocatalytic degradation of methylene blue dye on reticulated vitreous carbon decorated with electrophoretically deposited TiO2 nanotubes
Photocatalytic degradation of methylene blue dye on reticulated vitreous carbon decorated with electrophoretically deposited TiO2 nanotubes
Titanate nanotubes (TiNT) were deposited over the surface of 100 pores per inch (ppi) reticulated vitreous carbon (RVC) by anodic electrophoresis at a cell voltage of 15 V, in an undivided cell, from an ethanol/water suspension containing TiNT coated with tetrabutylammonium hydroxide (TBAOH) surfactant. Scanning electron microscopy showed the open cell porous structure of TiNT/RVC coated by a uniform ca. 30 μm thick layer of TiNT. Calcination at 450 °C for 2 h in air improved the photocatalytic properties. The material was used as photocatalyst for the decolourisation of methylene blue (MB) dye. The 98% volumetric porosity of the RVC substrate provided good reactant access and large surface area for deposition of TiNT. The calcined TiNT/RVC substrate achieved a 91% dye degradation after 20 min, which was higher than uncoated, acid treated RVC and non-calcined TiNT/RVC substrate. The MB decolourisation improved at an increased thickness of 3D TiNT/RVC catalyst although the improvement was limited to 4 mm on 100 ppi RVC due to limited UV penetration.
catalytic processes, composites, glassy carbon, ion assisted deposition, nanotubes
Zaidi, Syed Zohaib Javaid
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Harito, Christian
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Bavykin, Dmitry
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Walsh, Frank
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Ponce De Leon Albarran, Carlos
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Martins, Alysson Stefan
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Yuliarto, Brian
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November 2020
Zaidi, Syed Zohaib Javaid
52ccc64d-89e9-4d44-afb0-29a131204907
Harito, Christian
d146fa4e-fa33-40fc-b4b2-f4a77e0e75e6
Bavykin, Dmitry
1e9fabfc-d078-4585-876f-85ff33b7eed5
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Ponce De Leon Albarran, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Martins, Alysson Stefan
f7e39808-0036-4ede-b9b0-a49ba2e08f94
Yuliarto, Brian
3817e4d8-9d7a-49a5-8a47-2a7dd7a0a9f3
Zaidi, Syed Zohaib Javaid, Harito, Christian, Bavykin, Dmitry, Walsh, Frank, Ponce De Leon Albarran, Carlos, Martins, Alysson Stefan and Yuliarto, Brian
(2020)
Photocatalytic degradation of methylene blue dye on reticulated vitreous carbon decorated with electrophoretically deposited TiO2 nanotubes.
Diamond and Related Materials, 109, [108001].
(doi:10.1016/j.diamond.2020.108001).
Abstract
Titanate nanotubes (TiNT) were deposited over the surface of 100 pores per inch (ppi) reticulated vitreous carbon (RVC) by anodic electrophoresis at a cell voltage of 15 V, in an undivided cell, from an ethanol/water suspension containing TiNT coated with tetrabutylammonium hydroxide (TBAOH) surfactant. Scanning electron microscopy showed the open cell porous structure of TiNT/RVC coated by a uniform ca. 30 μm thick layer of TiNT. Calcination at 450 °C for 2 h in air improved the photocatalytic properties. The material was used as photocatalyst for the decolourisation of methylene blue (MB) dye. The 98% volumetric porosity of the RVC substrate provided good reactant access and large surface area for deposition of TiNT. The calcined TiNT/RVC substrate achieved a 91% dye degradation after 20 min, which was higher than uncoated, acid treated RVC and non-calcined TiNT/RVC substrate. The MB decolourisation improved at an increased thickness of 3D TiNT/RVC catalyst although the improvement was limited to 4 mm on 100 ppi RVC due to limited UV penetration.
Text
Photocatalytic Degradation of Methylene Blue Dye on RVC
More information
Accepted/In Press date: 18 June 2020
Published date: November 2020
Additional Information:
Funding Information:
S.Z.J. Zaidi gratefully acknowledges financial support from the Faculty of Engineering and the Environment at the University of Southampton for the Rayleigh studentship, to the European Commission Project H2020 CO2EXIDE , and to the Bestway Foundation , Charity No. 297178 , UK.
Publisher Copyright:
© 2020 Elsevier B.V.
Keywords:
catalytic processes, composites, glassy carbon, ion assisted deposition, nanotubes
Identifiers
Local EPrints ID: 442659
URI: http://eprints.soton.ac.uk/id/eprint/442659
ISSN: 0925-9635
PURE UUID: 7e2c89ac-a39a-4df7-bdb0-000009fb967f
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Date deposited: 22 Jul 2020 16:31
Last modified: 17 Mar 2024 05:45
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Contributors
Author:
Syed Zohaib Javaid Zaidi
Author:
Christian Harito
Author:
Alysson Stefan Martins
Author:
Brian Yuliarto
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