降级(电信)
催化作用
比表面积
碳纤维
双酚A
化学
反应速率常数
蚀刻(微加工)
多孔性
兴奋剂
氮气
化学工程
学位(音乐)
分析化学(期刊)
材料科学
动力学
环境化学
有机化学
复合材料
光电子学
工程类
图层(电子)
环氧树脂
物理
复合数
电信
量子力学
计算机科学
声学
作者
Tailu Dong,Chen Ling,Lichun Fu,Yuzhu Xue,Yuwei Pan,Ying Zhang,Changqing Zhu
标识
DOI:10.1016/j.jhazmat.2022.130562
摘要
High-temperature nitrogen (N) doping boosts the activity of biochars for peroxymonosulfate (PMS) activation, but the N heat loss causes the unsatisfactory catalytic efficiency. Improving the surface area for obtaining the high exposure of N sites is a promising solution. Herein, a soft template-KHCO3 etching strategy is used to synthesize the N-doped porous bowl-like carbon (NPBC) with ultrahigh external surface area (1610.8 m2 g-1). The bowl-like structure eliminates inert bulk interior and allows unobstructed mass transfer of reactants onto both outer and inner surfaces, while the large pore channels by KHCO3 etching further improves the exposure degree of limited N sites. Although NPBC has only 0.43% N content, 93.1% of bisphenol A (BPA) is removed within 1 min through the electron-transfer pathway by fully utilizing the N active centers, and the kinetic rate constant (k) reaches 5.29 min-1, exceeding reported values by 2-270 times. Moreover, the NPBC/PMS system possesses excellent applicability for various organics and conditions, effectively mineralizes BPA and reduces effluent biotoxicity. A quantitative index W representing N exposure degree is first proposed and shows high linearity with the k values of BPA degradation (R2=0.992, 0
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