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• W2992102754 endingPage "123726" @default.
• W2992102754 startingPage "123726" @default.
• W2992102754 abstract "Previous studies have reported that metal-doped graphitic carbon nitride (g-C3N4) materials can activate peroxymonosulfate (PMS) to destruct organic pollutants. Herein, we interestingly found that pure g-C3N4 materials synthesized via a facile calcination protocol without any metal doping could serve as the efficient PMS activator for degrading bisphenol A (BPA). The influences of different precursors (i.e., melamine, dicyandiamide, and urea) and annealing ambience (i.e., air or N2) on the catalytic activity were investigated. The resultant g-C3N4 materials exhibited different catalytic activities for PMS activation. The best performance was found in the case of g-C3N4 synthesized from melamine and annealed in N2 (g-C3N4-Melamine-N2); 100% BPA (10 μM) removal was achieved by using 0.5 g/L catalyst and 1 mM PMS at pH 7 in 15 min. The difference in catalytic activities of these g-C3N4 materials might be attributed to the fact that different preparation procedures impacted the chemical composition and structure of catalysts and thus changed the type and density of active sites. Important influencing factors such as PMS dosage, temperature, solution pH, and water matrices on degradation kinetics of BPA were evaluated. Results of quenching experiments and electron paramagnetic resonance spectroscopy revealed that sulfate radical and hydroxyl radical were main reactive species for BPA degradation by the g-C3N4/PMS system, which was also confirmed by the non-selectivity of this system towards various organics. Furthermore, possible transformation pathways of BPA by the g-C3N4/PMS system were proposed based on the identified oxidation products, primarily involving hydroxylation, bond cleavage, ring opening, as well as radical coupling. This study deepens mechanistic understanding of g-C3N4 materials driven PMS oxidation processes, and also provides a green and efficient strategy for eliminating BPA in water." @default.
• W2992102754 created "2019-12-13" @default.
• W2992102754 creator A5002352268 @default.
• W2992102754 creator A5002360271 @default.
• W2992102754 creator A5020466328 @default.
• W2992102754 creator A5034654778 @default.
• W2992102754 creator A5043530573 @default.
• W2992102754 creator A5046137696 @default.
• W2992102754 date "2020-05-01" @default.
• W2992102754 modified "2023-10-18" @default.
• W2992102754 title "Facile synthesis of pure g-C3N4 materials for peroxymonosulfate activation to degrade bisphenol A: Effects of precursors and annealing ambience on catalytic oxidation" @default.
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