p-n Junction catalysis in action: Boosting norfloxacin photodegradation with ZIF-67-based Co 3 O 4 wrapped in MoS 2 with surface functionalized graphene quantum-dot
Applied Surface Science, ISSN: 0169-4332, Vol: 653, Page: 159374
2024
- 4Citations
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- 1Mentions
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Article Description
The primary challenge in photocatalytic application is to address the inefficiency in exploiting the photo-induced charge carriers. The dynamic behaviors of photogenerated carriers can be controlled through an internal electric field by building a p-n heterojunction. In this respect, p-n heterojunctions constructed from zeolitic imidazolate frameworks (ZIFs) with further surface functionalization are uniquely active and can increase the charge separation due to a favorable band structure. Thus, the present work demonstrates the preparation of an excellent visible-light absorbing photocatalyst based on a Co 3 O 4 from ZIF-67 wrapped with MoS 2 and functionalized with graphene quantum dots (GQDs), which is evaluated for the photodegradation of norfloxacin. Under visible light irradiation, the as-designed GQDs-functionalized MoS 2 @Co 3 O 4 p-n heterojunction photocatalyst outperforms the individual MoS 2 and Co 3 O 4 semiconductors. The remarkable degradation efficiency is mostly due to the formation of a p-n heterojunction between MoS 2 and the ZIF-67-based Co 3 O 4. The photocatalytic mechanism of the as-designed system is deduced from reactive species trapping studies. This study sheds light on the design of a photocatalytic system based on ZIF-67, and on the effect of surface functionalization, thereby expanding the potential practical application of these materials in the field of environmental remediation.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0169433224000886; http://dx.doi.org/10.1016/j.apsusc.2024.159374; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85182728757&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0169433224000886; https://dx.doi.org/10.1016/j.apsusc.2024.159374
Elsevier BV
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