Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 219, Issue -, Pages 36-44Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.07.019
Keywords
CoO; Carbon dots; Co-catalyst; Tetracycline; Photocatalyst
Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Natural Science Foundation of China [51422207, 51572179, 21471106, 21501126]
- Natural Science Foundation of Jiangsu Province [BK20161216]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Octahedral CoO with exposed high-reactive (111) facets holds a promising noble-metal-free material in the photocatalysis. However, the (111) facet is usually unstable and easily deactivated during the photocatalytic process as the result of its poloar catastrophe. In this work, carbon dots (CDs) as co-catalyst modified and stabilized the (111) facets of Coo octahedrons (CDs-CoO) were prepared by one-step solvothermal method. The desired CDs-CoO shows the excellent photocatalytic activity and well stability. Meanwhile, the CDs-CoO (5 wt.%) composite exhibits the highest photocatalytic activity for degradation of tetracycline (87%, 60 min), and presents remarkable photostability after five successive cycles (5 h). This enhanced photocatalytic activity and outstanding stability in CDs-CoO composites could be ascribed to several merits of CDs that not only improve charge separation efficiency but also strengthen the interaction between CDs and high-reactive (111) facets of CoO octahedrons. (C) 2017 Elsevier B.V. All rights reserved.
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