Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane
This study investigates the facile fabrication of interfacial defects assisted amorphous TiO2 nanotubes arrays (am-TNTA) for promoting gas-phase CO2 photoreduction to methane. The am-TNTA catalyst was fabricated via a one-step synthesis, without heat treatment, by anodization of Titanium in Ethylene...
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my.utm.1031562023-11-13T04:56:55Z http://eprints.utm.my/103156/ Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane Santos, Janaina S. Mohammad Fereidooni, Mohammad Fereidooni Marquez, Victor Arumugam, Malathi Muhammad Tahir, Muhammad Tahir Praserthdam, Supareak Praserthdam, Piyasan TP Chemical technology This study investigates the facile fabrication of interfacial defects assisted amorphous TiO2 nanotubes arrays (am-TNTA) for promoting gas-phase CO2 photoreduction to methane. The am-TNTA catalyst was fabricated via a one-step synthesis, without heat treatment, by anodization of Titanium in Ethylene glycol-based electrolyte in a shorter anodizing time. The samples presented a TiO2 nanostructured array with a nanotubular diameter of 100 ± 10 nm, a wall thickness of 26 ± 5 nm, and length of 3.7 ± 0.3 µm, resulting in a specific surface of 0.75 m2 g. The am-TNTA presented prolonged chemical stability, a high exposed surface area, and a large number of surface traps that can reduce the recombination of the charge carriers. The am-TNTA showed promising photoactivity when tested in the CO2 reduction reaction with water under UV irradiation with a methane production rate of 14.0 µmol gcat-1 h-1 for a pure TiO2 material without any modification procedure. This enhanced photocatalytic activity can be explained in terms of surface defects of the amorphous structure, mainly OH groups that can act as electron traps for increasing the electron lifetime. The CO2 interacts directly with those traps, forming carbonate species, which favors the catalytic conversion to methane. The am-TNTA also exhibited a high stability during six reaction cycles. The photocatalytic activity, the significantly reduced time for synthesis, and high stability for continuous CH4 production make this nanomaterial a potential candidate for a sustainable CO2 reduction process and can be employed for other energy applications. Elsevier Ltd 2022 Article PeerReviewed Santos, Janaina S. and Mohammad Fereidooni, Mohammad Fereidooni and Marquez, Victor and Arumugam, Malathi and Muhammad Tahir, Muhammad Tahir and Praserthdam, Supareak and Praserthdam, Piyasan (2022) Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane. Chemosphere, 289 (NA). pp. 1-13. ISSN 0045-6535 http://dx.doi.org/10.1016/j.chemosphere.2021.133170 DOI : 10.1016/j.chemosphere.2021.133170 |
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TP Chemical technology Santos, Janaina S. Mohammad Fereidooni, Mohammad Fereidooni Marquez, Victor Arumugam, Malathi Muhammad Tahir, Muhammad Tahir Praserthdam, Supareak Praserthdam, Piyasan Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
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This study investigates the facile fabrication of interfacial defects assisted amorphous TiO2 nanotubes arrays (am-TNTA) for promoting gas-phase CO2 photoreduction to methane. The am-TNTA catalyst was fabricated via a one-step synthesis, without heat treatment, by anodization of Titanium in Ethylene glycol-based electrolyte in a shorter anodizing time. The samples presented a TiO2 nanostructured array with a nanotubular diameter of 100 ± 10 nm, a wall thickness of 26 ± 5 nm, and length of 3.7 ± 0.3 µm, resulting in a specific surface of 0.75 m2 g. The am-TNTA presented prolonged chemical stability, a high exposed surface area, and a large number of surface traps that can reduce the recombination of the charge carriers. The am-TNTA showed promising photoactivity when tested in the CO2 reduction reaction with water under UV irradiation with a methane production rate of 14.0 µmol gcat-1 h-1 for a pure TiO2 material without any modification procedure. This enhanced photocatalytic activity can be explained in terms of surface defects of the amorphous structure, mainly OH groups that can act as electron traps for increasing the electron lifetime. The CO2 interacts directly with those traps, forming carbonate species, which favors the catalytic conversion to methane. The am-TNTA also exhibited a high stability during six reaction cycles. The photocatalytic activity, the significantly reduced time for synthesis, and high stability for continuous CH4 production make this nanomaterial a potential candidate for a sustainable CO2 reduction process and can be employed for other energy applications. |
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Article |
author |
Santos, Janaina S. Mohammad Fereidooni, Mohammad Fereidooni Marquez, Victor Arumugam, Malathi Muhammad Tahir, Muhammad Tahir Praserthdam, Supareak Praserthdam, Piyasan |
author_facet |
Santos, Janaina S. Mohammad Fereidooni, Mohammad Fereidooni Marquez, Victor Arumugam, Malathi Muhammad Tahir, Muhammad Tahir Praserthdam, Supareak Praserthdam, Piyasan |
author_sort |
Santos, Janaina S. |
title |
Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
title_short |
Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
title_full |
Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
title_fullStr |
Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
title_full_unstemmed |
Single-step fabrication of highly stable amorphous TiO2 nanotubes arrays (am-TNTA) for stimulating gas-phase photoreduction of CO2 to methane |
title_sort |
single-step fabrication of highly stable amorphous tio2 nanotubes arrays (am-tnta) for stimulating gas-phase photoreduction of co2 to methane |
publisher |
Elsevier Ltd |
publishDate |
2022 |
url |
http://eprints.utm.my/103156/ http://dx.doi.org/10.1016/j.chemosphere.2021.133170 |
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1783876352390201344 |
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13.18916 |