Integration of Single-Atom Catalyst with Z-Scheme Heterojunction for Cascade Charge Transfer Enabling Highly Efficient Piezo-Photocatalysis.
In: Advanced science (Weinheim, Baden-Wurttemberg, Germany), Jg. 10 (2023-10-01), Heft 28, S. e2303448
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Zugriff:
Piezo-assisted photocatalysis (namely, piezo-photocatalysis), which utilizes mechanical energy to modulate spatial and energy distribution of photogenerated charge carriers, presents a promising strategy for molecule activation and reactive oxygen species (ROS) generation toward applications such as environmental remediation. However, similarly to photocatalysis, piezo-photocatalysis also suffers from inferior charge separation and utilization efficiency. Herein, a Z-scheme heterojunction composed of single Ag atoms-anchored polymeric carbon nitride (Ag-PCN) and SnO 2- x is developed for efficient charge carrier transfer/separation both within the catalyst and between the catalyst and surface oxygen molecules (O 2 ). As revealed by charge dynamics analysis and theoretical simulations, the synergy between the single Ag atoms and the Z-scheme heterojunction initiates a cascade electron transfer from SnO 2- x to Ag-PCN and then to O 2 adsorbed on Ag. With ultrasound irradiation, the polarization field generated within the piezoelectric hybrid further accelerates charge transfer and regulates the O 2 activation pathway. As a result, the Ag-PCN/SnO 2- x catalyst efficiently activates O 2 into ·O 2 - , ·OH, and H 2 O 2 under co-excitation of visible light and ultrasound, which are consequently utilized to trigger aerobic degradation of refractory antibiotic pollutants. This work provides a promising strategy to maneuver charge transfer dynamics for efficient piezo-photocatalysis by integrating single-atom catalysts (SACs) with Z-scheme heterojunction.
(© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.)
Titel: |
Integration of Single-Atom Catalyst with Z-Scheme Heterojunction for Cascade Charge Transfer Enabling Highly Efficient Piezo-Photocatalysis.
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Autor/in / Beteiligte Person: | Jiang, W ; Zhu, H ; Yang, J ; Low, BQL ; Wu, WY ; Chen, M ; Ma, J ; Long, R ; Low, J ; Heng, JZX ; Tang, KY ; Chai, CHT ; Lin, M ; Zhu, Q ; Zhang, YW ; Chi, D ; Li, Z ; Loh, XJ ; Xiong, Y ; Ye, E |
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Zeitschrift: | Advanced science (Weinheim, Baden-Wurttemberg, Germany), Jg. 10 (2023-10-01), Heft 28, S. e2303448 |
Veröffentlichung: | Weinheim : WILEY-VCH, [2014]-, 2023 |
Medientyp: | academicJournal |
ISSN: | 2198-3844 (electronic) |
DOI: | 10.1002/advs.202303448 |
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