Journal
DALTON TRANSACTIONS
Volume 46, Issue 45, Pages 15769-15777Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt03003g
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Funding
- National Natural Science Foundation of China [51603115, 51402169]
- China Postdoctoral Science Foundation [2017M612266]
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In this study, carbon nanodots (C-dots)/WO3 photocatalysts were prepared via a two-step hydrothermal method. The morphologies and optical properties of the as-prepared materials were investigated. Compared with the prepared WO3 and C-dots, the C-dots/WO3 possessed stronger photocatalytic capability and excellent recyclability for photocatalytic elimination of Rhodamine B. For example, the achieved first order reaction rate constant of 0.01942 min(-1) for C-dots/WO3 was similar to 7.7 times higher than that of the prepared WO3. The enhanced photocatalytic activity of C-dots/WO3 was attributed to the enhanced light harvesting ability and efficient spatial separation of photo-excited electron-hole pairs resulting from the synergistic effect of WO3 and C-dots. The high photocatalytic activity of C-dots/WO3 remained unchanged even after 3 cycles of use. Meanwhile, a possible mechanism of C-dots/WO3 for the enhanced photocatalytic activity was proposed.
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