气凝胶
石墨烯
纳米颗粒
电子顺磁共振
激进的
氧化物
化学工程
催化作用
材料科学
化学
纳米技术
核化学
无机化学
降级(电信)
有机化学
计算机科学
冶金
工程类
物理
电信
核磁共振
作者
Fujun Ren,Tong Wang,Haitao Liu,Desheng Liu,Rui Zhong,Changyu You,Weijun Zhang,Suyun Lv,Shanshan Liu,Hao Zhu,Lu Chang,Bo Wang
标识
DOI:10.1016/j.seppur.2020.118179
摘要
We proposed a new peroxymonosulfate (PMS) activator that the dispersed CoMn2O4 nanoparticles embedded in nitrogen-doped reduced graphene oxide aerogel (CoMn2O4@N-rGA) with interlinked three-dimensional network via hydrothermal method for oxytetracycline (OTC) degradation. CoMn2O4@N-rGA and PMS (CoMn2O4@N-rGA/PMS) exhibited a high degradation rate of 91.3% within 20 min and a rapid catalytic degradation rate of 0.0729 min−1. The radical pathway system had excellent effects on OTC degradation in a wide range of pH from 3.0 to 9.0 and an outstanding catalytic activity on actual pharmaceutical wastewater. It was attributed to dispersed CoMn2O4 nanoparticles embed in nitrogen-doped reduced graphene oxide aerogel with interlinked three-dimensional network by Scanning electron microscope (SEM). The mechanism was hypothesized that PMS was activated to generate sulfate radical (SO4-) and hydroxyl radicals (OH), which could be confirmed via free radical quenching test and electron paramagnetic resonance (EPR) spectra. Finally, a flow-type setup based on the feedback mechanism with excellent effect on high concentration of OTC and actual pharmaceutical wastewater was designed for verifying the practical value of the system.
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