Oxygen-vacancy-mediated photocatalytic degradation of tetracycline under weak visible-light irradiation over hierarchical BiMoO@BiO core-shell fibers
Novel oxygen-vacancy-rich hierarchical Bi 2 MoO 6 @Bi 2 O 3 core-shell fibers were prepared by the in situ growth of Bi 2 MoO 6 nanosheets on Bi 2 O 3 nanofibers via an electrospinning-calcination-solvothermal method. The in situ growth contributed to the formation of an intimate interface between B...
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| Published in | Catalysis science & technology Vol. 12; no. 5; pp. 1685 - 1696 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Published |
07.03.2022
|
| Online Access | Get full text |
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| Summary: | Novel oxygen-vacancy-rich hierarchical Bi
2
MoO
6
@Bi
2
O
3
core-shell fibers were prepared by the
in situ
growth of Bi
2
MoO
6
nanosheets on Bi
2
O
3
nanofibers
via
an electrospinning-calcination-solvothermal method. The
in situ
growth contributed to the formation of an intimate interface between Bi
2
MoO
6
nanosheets and Bi
2
O
3
nanofibers, thereby constructing an efficient 1D/2D heterojunction and obtaining a 3D hierarchical structure at the same time. More importantly, the growth of Bi
2
MoO
6
nanosheets on Bi
2
O
3
yielded superficial oxygen vacancies. Such a special morphology and defect structure could not only increase the light harvesting, but also promote the separation of photo-induced electrons and holes through a Z-scheme charge transfer mechanism. Therefore, the Bi
2
MoO
6
@Bi
2
O
3
composite photocatalyst showed excellent photocatalytic performance under weak visible-light illumination, thus exhibiting potential for application in the degradation of antibiotics. This promising Bi
2
MoO
6
@Bi
2
O
3
photocatalyst had a superior photocatalytic degradation rate of 96.3% for TC under 5 W LED visible-light irradiation for 3 hours, which was 6.0 and 4.9 times higher than those of pristine Bi
2
O
3
and Bi
2
MoO
6
, respectively. Moreover, two main possible photocatalytic degradation pathways for TC over the Bi
2
MoO
6
@Bi
2
O
3
photocatalyst were also proposed.
Novel oxygen-vacancy-rich Bi
2
MoO
6
@Bi
2
O
3
core-shell fibers with 3D hierarchical structures have been successfully synthesized, and exhibit enhanced photocatalytic activities for degrading the antibiotic TC under weak visible-light illumination. |
|---|---|
| Bibliography: | Electronic supplementary information (ESI) available. See DOI 10.1039/d1cy02285g |
| ISSN: | 2044-4753 2044-4761 |
| DOI: | 10.1039/d1cy02285g |