催化作用
电子顺磁共振
激进的
浸出(土壤学)
化学
氧化还原
氧化物
氧化钴
降级(电信)
氧化铁
无机化学
钴
光化学
核化学
有机化学
土壤水分
土壤科学
物理
电信
核磁共振
计算机科学
环境科学
作者
Mingxing Nie,Yulian Li,Lianxiang Li,Jianming He,Peidong Hong,Kaisheng Zhang,Xiangbin Cai,Lingtao Kong,Jinhuai Liu
标识
DOI:10.1016/j.apsusc.2020.147655
摘要
Ultrathin iron-cobalt oxide nanosheets (CoFe-ONSs) synthesized via a facile one-step routine by using NaBH4 as the reductant were used for H2O2 activation and tetracycline (TC) elimination. The CoFe-ONSs realized 83.5% removal of TC under the neutral conditions after 50 min with 0.3 g/L catalyst, 20 mM H2O2 and 50 mg/L TC. The effects of catalyst dosage, H2O2 concentration, initial pH, temperature, initial TC concentration, anions and water sources on TC degradation were studied. Hydroxyl (OH) radicals were the main active species in the entire reaction, which was demonstrated by quenching experiments, fluorescence detection and the electron paramagnetic resonance (EPR) technology. Additionally, the redox cycles of FeII/FeIII and CoII/CoIII were participated in OH generation. What’s more, the plausible degradation pathways were put forward followed with detected intermediates. The CoFe-ONSs displayed negligible iron ions leaching and held high TC elimination performance even after five trials. Therefore, the CoFe-ONSs may expand the heterogeneous Fenton-like catalysts family and display great potential in eliminating antibiotic contaminants from wastewater.
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