氮掺杂碳负载氧化钴纳米团簇活化过一硫酸盐

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Abstract By using natural cuttlebone as the template, cobalt oxide cluster supported on nitrogen-doped carbon (CoO-CN) were synthesized and applied for degradation of norfloxacin (NOR) via peroxymonosulfate (PMS) activation. The results indicate that the NOR can be effectively degraded by CoO-CN via PMS activation over a wide pH range (pH 3.0~11.0) with the NOR removal percentages all greater than 95%. After five recycling tests, the NOR degradation percentages still retained by 91.8% in the CoO-CN/PMS system. These results demonstrated that the CoO-CN possessed excellent catalytic performance and reusability, which is promising for practical applications in wastewater treatment. Quenching experiments and electron paramagnetic resonance (EPR) manifested that the CoO-CN/PMS system involved in two pathways, that are the radical and non-radical pathways, and produced three kinds of reactive oxygen species (ROS), including sulfate radical (SO₄^·-), hydroxyl radical (·OH) and singlet oxygen (¹O₂), for the oxidative degradation of NOR. As compared with pure CN, extra Co active sites can be provided by the CoO-CN, thereby significant enhancing the catalytic performance for PMS activation. In addition, the simple synthetic method and low-cost of CoO-CN endowed it with broad application prospect for organic wastewater treatment.

Key words： advanced oxidation process peroxymonosulfate carbon material antibiotic wastewater treatment

Received: 07 September 2022

PACS:

X703.5

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	Articles by authors
	LI Wen-xuan
	ZHANG Pei-qin
	SUN Jian-fu
	LIU Dan
	WU Xi-lin
	CHEN Jian-rong

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LI Wen-xuan,ZHANG Pei-qin,SUN Jian-fu等. Nitrogen-doped carbon supported cobalt oxide clusters for peroxymonosulfate activation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2341-2346.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2341

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