过氧二硫酸盐
过硫酸盐
化学
电子顺磁共振
催化作用
光化学
单线态氧
罗丹明B
热解
猝灭(荧光)
核化学
无机化学
碳纤维
活性炭
氮气
激进的
石墨氮化碳
化学工程
X射线光电子能谱
降级(电信)
作者
Rui Luo,Junwen Wu,Jing Zhao,Dong Fang,Zongtang Liu,Lin Hu
标识
DOI:10.1016/j.envres.2021.112060
摘要
The non-radical oxidation processes of persulfate activation by carbon materials have shown great potential for industrial and saline wastewater treatment. Recently, metal-organic frameworks (MOFs) as an emerging precursor have been widely used for fabricating functional carbon materials. Herein, we reported ZIF-8 derived defect-rich nitrogen-doped carbon (ZCNs) via NaCl-assisted pyrolysis for efficient non-radical activation of peroxydisulfate to degrade rhodamine B (RB). All samples exhibited excellent catalytic activity, and ZCN-900 (pyrolyzed at 900 °C) was found to be the most active, able to degrade 96 % of RB quickly within 10 min. Quenching tests and electron paramagnetic resonance (EPR) analyses suggested that the singlet oxygen (1O2) dominated the degradation process by a non-radical pathway. Furthermore, the effect of anions and water quality on RB oxidation were investigated, and ZCN-900/PDS system showed great resistance to the anions and natural organic matters (NOM). This work may provide a significant addition to MOF-based functional materials for environmental remediation based on the results above.
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