Bian, J;
Zhang, Z;
Feng, J;
Thangamuthu, M;
Yang, F;
Sun, L;
Li, Z;
... Jing, L; + view all
(2021)
Energy Platform for Directed Charge Transfer in the Cascade Z-Scheme Heterojunction: CO2 Photoreduction without a Cocatalyst.
Angewandte Chemie: International Edition
, 60
(38)
pp. 20906-20914.
10.1002/anie.202106929.
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Abstract
A universal strategy is developed to construct a cascade Z-scheme system, in which an effective energy platform is a core to direct charge transfer and separation, blocking the unexpected type-II charge transfer pathway. The dimension-matched (001)TiO 2 -g-C 3 N 4 /BiVO 4 nanosheet heterojunction (T-CN/BVNS) is the first such model. The optimized cascade Z-scheme exhibits ~19-fold photoactivity improvement for CO 2 reduction to CO in the absence of cocatalysts and costly sacrificial agents under visible-light irradiation, compared with BVNS, which is also superior to other reported Z-scheme systems even with noble metals as mediators. The experimental results and DFT calculations based on Van der Waals structural models on the ultrafast timescale reveal the introduced T as the platform could not only prolong the lifetimes of spatially separated electrons and holes but also did not compromise their reduction and oxidation potentials.
| Type: | Article |
|---|---|
| Title: | Energy Platform for Directed Charge Transfer in the Cascade Z-Scheme Heterojunction: CO2 Photoreduction without a Cocatalyst |
| Location: | Germany |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/anie.202106929 |
| Publisher version: | https://doi.org/10.1002/anie.202106929 |
| Language: | English |
| Additional information: | 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Solar fuel synthesis, Cascade Z scheme heterojunction, CO2 photoreduction, Water splitting, Energy platform |
| 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/10131667 |
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