Sciact
  • EN
  • RU

ZnO/COF S-scheme heterojunction for improved photocatalytic H2O2 production performance Full article

Journal Chemical Engineering Journal
ISSN: 1385-8947
Output data Year: 2022, Volume: 444, Article number : 136584, Pages count : DOI: 10.1016/j.cej.2022.136584
Tags Charge transfer and separation; Covalent organic frameworks; Photocatalytic H2O2 production; S-scheme heterojunction; ZnO
Authors Zhang Y. 1 , Qiu J. 3 , Zhu B. 2 , Fedin M.V. 4 , Cheng B. 3 , Yu J. 2 , Zhang L. 2
Affiliations
1 School of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, People’s Republic of China
2 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, People’s Republic of China
3 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, People’s Republic of China
4 Laboratory of Magnetic Resonance, International Tomography Center, Institutskaya 3A, Novosibirsk 630090, Russia

Abstract: Covalent organic frameworks (COFs) are burgeoning crystalline porous materials with great potential in photocatalysis, but their applications are mainly restricted by the speedy recombination rate of charge carriers. Herein, a step-scheme heterojunction ZnO/COF(TpPa-Cl) is fabricated by a simple electrostatic self-assembly method, and its photocatalytic H2O2 production performance is also investigated. The S-scheme heterojunction between ZnO and TpPa-Cl contributes to enhanced light absorption, promoted reactant adsorption capacity, increased redox power, and efficient separation and transfer of photogenerated charge carriers, leading to an improved photocatalytic H2O2 evolution activity. The optimal composite possesses the maximum H2O2 evolution rate of 2443 μmol·g−1·h−1 under simulated solar light irradiation, which is about 3.3 and 8.7 times higher than pristine ZnO nanoparticles and TpPa-Cl, respectively. Moreover, the charge transfer pathway in S-scheme heterojunction photocatalysts is well elucidated. This investigation provides designing guidelines in the construction of other COF-based S-scheme heterojunctions. © 2022 Elsevier B.V.
Cite: Zhang Y. , Qiu J. , Zhu B. , Fedin M.V. , Cheng B. , Yu J. , Zhang L.
ZnO/COF S-scheme heterojunction for improved photocatalytic H2O2 production performance
Chemical Engineering Journal. 2022. V.444. 136584 . DOI: 10.1016/j.cej.2022.136584 WOS Scopus OpenAlex
Identifiers:
Web of science: WOS:000800389600002
Scopus: 2-s2.0-85129607560
OpenAlex: W4224629874
Citing:
DB Citing
Scopus 171
OpenAlex 184
Web of science 206
Altmetrics: