碳氮掺杂Mn<sub>3</sub>O<sub>4</sub>催化臭氧氧化降解水中2,3-二甲基吡嗪

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Abstract A CN-supported Mn₃O₄ (Mn₃O₄-CN) composite was synthesized as a catalyst for the catalytic ozonation of 2,3-dimethylpyrazine degradation in wastewater. The catalytic efficiencies of 2, 3-dimethylpyrazine were investigated under various ozone dosages, catalyst dosages, pH and temperature conditions. The results showed that under the conditions of an ozone dosage of 3mg/L, a catalyst dosage of 0.02g/L, pH =7 and a temperature of 10℃, the degradation rate of pollutants reached 100% within 20 min. Scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and other characterization methods were used to analyze the properties of the prepared Mn₃O₄-CN. It was confirmed that Mn₃O₄ and CN were successfully bonded, and the valence states of Mn were mostly +2 and +3. The reactive oxygen species analysis demonstrated that the surface hydroxyl groups and oxygen vacancies were identified as the main active sites, and ×OH was the main active oxygen species generated in the reaction system. The cyclic experiments showed that the Mn₃O₄-CN has good stability and reusability.

Key words： catalytic ozonation pyrazines water treatment manganese oxide

Received: 09 August 2024

PACS:

X703.5

Corresponding Authors: 汪达,副教授,wangda@zjut.edu.cn E-mail: wangda@zjut.edu.cn

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	CHEN Yi
	HE Yin-ning
	WANG Da
	SONG Shuang
	MA Jun

Cite this article:

CHEN Yi,HE Yin-ning,WANG Da等. Catalytic ozonation of 2,3-dimethylpyrazine using CN-doped Mn₃O₄[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(3): 1251-1259.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I3/1251

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