Cu2O/BiVO4 heterostructure controllably triggers radical and non-radical persulfate activation via light "on-off" for efficient organic contaminants degradation.
In: Applied Catalysis B: Environmental, Jg. 344 (2024-05-05), S. N.PAG
academicJournal
Zugriff:
The regulation of peroxydisulfate (PDS) activation pathway is crucial for its practical application in complicated water matrix. In this work, we have developed a Cu 2 O/BiVO 4 (Cu-BVO) heterostructure to achieve controlled triggering of both radical and non-radical PDS activation by dexterously utilizing light "on-off" for highly efficient degradation of organic contaminants. In dark condition, Cu-BVO serves as an electron donor to facilitate the cleavage of O-O bond in PDS via a radical pathway to generate •OH and •O 2 -. Upon light irradiation, Cu-BVO unexpectedly acts as an electron acceptor in the reversed electron flow to generate a metastable surface complex (Cu-BVO-PDS*) via non-radical pathway. Analysis of the kinetic behavior of the excited electrons and holes suggests that the directional migration of photo-excited charge carriers in Cu-BVO results in the electron-deficient region on the Cu 2 O surface, which provides an ideal platform for the generation of Cu-BVO-PDS*. [Display omitted] • Cu 2 O/BiVO 4 triggers radical and non-radical PDS activation via light switch • Light-induced electron-deficient regions promote Cu-BVO-PDS* generation • Efficient organic contaminants degradation is achieved by PDS activation • Controllable PDS activation pathway benefits the application in real water matrix [ABSTRACT FROM AUTHOR]
Titel: |
Cu2O/BiVO4 heterostructure controllably triggers radical and non-radical persulfate activation via light "on-off" for efficient organic contaminants degradation.
|
---|---|
Autor/in / Beteiligte Person: | Bai, Chengbo ; Guo, Wenjin ; Liu, Qiong ; Li, Guangfang ; Guo, Sheng ; Chen, Rong |
Link: | |
Zeitschrift: | Applied Catalysis B: Environmental, Jg. 344 (2024-05-05), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0926-3373 (print) |
DOI: | 10.1016/j.apcatb.2023.123606 |
Schlagwort: |
|
Sonstiges: |
|