Peroxymonosulfate activation by Fe-N-S co-doped tremella-like carbocatalyst for degradation of bisphenol A: Synergistic effect of pyridine N, Fe-N x , thiophene S
Journal of Environmental Sciences, ISSN: 1001-0742, Vol: 129, Page: 213-228
2023
- 16Citations
- 11Captures
- 1Mentions
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University of Electronic Science and Technology of China Reports Findings in Science (Peroxymonosulfate activation by Fe-N-S co-doped tremella-like carbocatalyst for degradation of bisphenol A: Synergistic effect of pyridine N, Fe-Nx, thiophene ...)
2023 MAR 07 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- New research on Science is the subject
Article Description
Bisphenol A (BPA) has received increasing attention due to its long-term industrial application and persistence in environmental pollution. Iron-based carbon catalyst activation of peroxymonosulfate (PMS) shows a good prospect for effective elimination of recalcitrant contaminants in water. Herein, considering the problem about the leaching of iron ions and the optimization of heteroatoms doping, the iron, nitrogen and sulfur co-doped tremella-like carbon catalyst (Fe-NS@C) was rationally designed using very little iron, S-C 3 N 4 and low-cost chitosan (CS) via the impregnation-calcination method. The as-prepared Fe-NS@C exhibited excellent performance for complete removal of BPA (20 mg/L) by activating PMS with the high kinetic constant (1.492 min −1 ) in 15 min. Besides, the Fe-NS@C/PMS system not only possessed wide pH adaptation and high resistance to environmental interference, but also maintained an excellent degradation efficiency on different pollutants. Impressively, increased S-C 3 N 4 doping amount modulated the contents of different N species in Fe-NS@C, and the catalytic activity of Fe-NS@C-1- x was visibly enhanced with increasing S-C 3 N 4 contents, verifying pyridine N and Fe-N x as main active sites in the system. Meanwhile, thiophene sulfur (C-S-C) as active sites played an auxiliary role. Furthermore, quenching experiment, EPR analysis and electrochemical test proved that surface-bound radicals ( · OH and SO 4 ⋅− ) and non-radical pathways worked in the BPA degradation (the former played a dominant role). Finally, possible BPA degradation route were proposed. This work provided a promising way to synthesize the novel Fe, N and S co-doping carbon catalyst for degrading organic pollutants with low metal leaching and high catalytic ability.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1001074222004843; http://dx.doi.org/10.1016/j.jes.2022.09.037; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85143983517&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/36804237; https://linkinghub.elsevier.com/retrieve/pii/S1001074222004843; http://sciencechina.cn/gw.jsp?action=cited_outline.jsp&type=1&id=7472683&internal_id=7472683&from=elsevier; https://dx.doi.org/10.1016/j.jes.2022.09.037
Elsevier BV
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