Cobalt oxide/copper bismuth oxide/samarium vanadate (Co3O4/CuBi2O4/SmVO4) dual Z-scheme heterostructured photocatalyst with high charge-transfer efficiency: Enhanced carbamazepine degradation under visible light irradiation
In: Journal of Colloid and Interface Science, Jg. 603 (2021-12-01), S. 666-684
Online
unknown
Zugriff:
Herein, a dual Z-scheme heterojunction photocatalyst consisting of Co3O4, CuBi2O4, and SmVO4 for carbamazepine (CBZ) degradation was synthesised and characterised by XRD, FTIR, UV–Vis DRS, XPS, FE-SEM, and TEM. The reduction in electron-hole recombination was evaluated by PL, LSV, and EIS analysis. The heterojunction, Co3O4/CuBi2O4/SmVO4 (CCBSV) showed enhanced photocatalytic activity of 76.1% ± 3.81 CBZ degradation under visible light irradiation, ascribed to the improved interfacial contact, visible light capturing ability, and enhanced electron-hole separation and transportation through the formation of Z-scheme heterojunction. The formation of dual Z-scheme was confirmed by active radical experiments and XPS analysis that helped to prose the mechanism of degradation. The catalyst showed sustained stability after 4 cycles of reuse. Ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS) was employed to identify the degradation by-products of CBZ, and a possible mechanistic degradation pathway was proposed. This study provided an insight into the development of efficient dual Z-scheme heterojunction photocatalyst for remediation of CBZ which can be extended to other organic pollutants.
Titel: |
Cobalt oxide/copper bismuth oxide/samarium vanadate (Co3O4/CuBi2O4/SmVO4) dual Z-scheme heterostructured photocatalyst with high charge-transfer efficiency: Enhanced carbamazepine degradation under visible light irradiation
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Autor/in / Beteiligte Person: | Liu, Dan ; Malefane, Mope E. ; Mamba, Bhekie B. ; Kuvarega, Alex T. ; Idris, Azeez O. ; Gui, Jianzhou ; Mafa, Potlako J. |
Link: | |
Zeitschrift: | Journal of Colloid and Interface Science, Jg. 603 (2021-12-01), S. 666-684 |
Veröffentlichung: | Elsevier BV, 2021 |
Medientyp: | unknown |
ISSN: | 0021-9797 (print) |
DOI: | 10.1016/j.jcis.2021.06.146 |
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