Journal
CHEMICAL ENGINEERING JOURNAL
Volume 446, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137274
Keywords
Carbon doped boron nitride; Peroxymonosulfate activation; Superoxide radicals; Endocrine disrupting compounds
Categories
Funding
- National Natural Science Foundation of China [52003240, 11804301]
- Zhejiang Provincial Natural Science Foundation of China [LQ21B070007, LY21A040008]
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Carbon-doped boron nitride (C-BN) catalyst synthesized through one-step pyrolysis method exhibited excellent activity for bisphenol A removal even at low temperature. The remarkable performance of C-BN was attributed to the B-N-C moieties, which promoted the generation of superoxide radicals.
Developing metal-free catalysts for persulfate-mediated oxidation process has been extensively pursued in environmental remediation, yet the activity of these catalysts is typically low and the mechanism is ambiguous. Herein, a facile one-step pyrolysis method was employed to synthesize the carbon doped boron nitride (C-BN) derived from polydopamine coated BN nanosheets. The C-BN could readily activate peroxymonosulfate (PMS) with the activation energy as low as 14.95 kJ/mol, giving rise to admirable performance for bisphenol A removal even at 0 celcius, which was superior to most reported metal-free catalysts. The combined experimental and density functional theory (DFT) analyses pointed out that the remarkable performance of C-BN originated from the B-N-C moieties, which could induce the electron transfer from catalyst to PMS to promote the fast generation of superoxide radicals (O2 center dot ) as the dominant reactive species. These findings take a step toward exploring the highly efficient metal-free catalysts for realistic applications.
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