Yuan, W;
Cheng, L;
An, Y;
Lv, S;
Wu, H;
Fan, X;
Zhang, Y;
... Tang, J; + view all
(2018)
Laminated Hybrid Junction of Sulfur-Doped TiO2 and a Carbon Substrate Derived from Ti3C2 MXenes: Toward Highly Visible Light-Driven Photocatalytic Hydrogen Evolution.
Advanced Science
, 5
(6)
, Article 1700870. 10.1002/advs.201700870.
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Abstract
TiO2 is an ideal photocatalyst candidate except for its large bandgap and fast charge recombination. A novel laminated junction composed of defect‐controlled and sulfur‐doped TiO2 with carbon substrate (LDC‐S‐TiO2/C) is synthesized using the 2D transition metal carbides (MXenes) as a template to enhance light absorption and improve charge separation. The prepared LDC‐S‐TiO2/C catalyst delivers a high photocatalytic H2 evolution rate of 333 µmol g−1 h−1 with a high apparent quantum yield of 7.36% at 400 nm and it is also active even at 600 nm, resulting into a 48 time activity compared with L‐TiO2/C under visible light irradiation. Further theoretical modeling calculation indicates that such novel approach also reduces activation energy of hydrogen production apart from broadening the absorption wavelength, facilitating charge separation, and creating a large surface area substrate. This synergic effect can also be applied to other photocatalysts' modification. The study provides a novel approach for synthesis defective metal oxides based hybrids and broaden the applications of MXene family.
| Type: | Article |
|---|---|
| Title: | Laminated Hybrid Junction of Sulfur-Doped TiO2 and a Carbon Substrate Derived from Ti3C2 MXenes: Toward Highly Visible Light-Driven Photocatalytic Hydrogen Evolution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/advs.201700870 |
| Publisher version: | https://doi.org/10.1002/advs.201700870 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Chemistry, Science & Technology - Other Topics, Materials Science, carbon, doping, MXenes, photocatalytic materials, TiO2, 2-DIMENSIONAL TITANIUM CARBIDE, HIGH VOLUMETRIC CAPACITANCE, GRAPHITIC CARBON, H-2 PRODUCTION, EFFICIENT ELECTROCATALYST, HYDROTHERMAL SYNTHESIS, NANOPOROUS GRAPHENE, ENERGY-CONVERSION, NANOTUBE ARRAYS, PERFORMANCE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10056347 |
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