Peroxymonosulfate activation by Fe-N-S co-doped tremella-like carbocatalyst for degradation of bisphenol A: Synergistic effect of pyridine N, Fe-N , thiophene S

催化作用 煅烧 化学 双酚A 噻吩 降级(电信) 核化学 浸出(土壤学) 无机化学 硫黄 杂原子 吡啶 有机化学 戒指(化学) 电信 环境科学 计算机科学 土壤科学 环氧树脂 土壤水分
作者
Wenjin Chen,Lele Lei,Ke Zhu,Dongdong He,Hongmei He,Xiulan Li,Yumeng Wang,Jin Huang,Yushi Ai
出处
期刊:Journal of Environmental Sciences-china [Elsevier BV]
卷期号:129: 213-228 被引量:17
标识
DOI:10.1016/j.jes.2022.09.037
摘要

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 ([email protected]) was rationally designed using very little iron, S-C3N4 and low-cost chitosan (CS) via the impregnation-calcination method. The as-prepared [email protected] 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 [email protected]/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-C3N4 doping amount modulated the contents of different N species in [email protected], and the catalytic activity of [email protected]x was visibly enhanced with increasing S-C3N4 contents, verifying pyridine N and Fe-Nx 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 SO4⋅−) 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.
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