现代化工

现代化工 ›› 2023, Vol. 43 ›› Issue (9) : 179-184. DOI: 10.16606/j.cnki.issn0253-4320.2023.09.037

科研与开发

SO₄^2-对MnCe_xO_y臭氧催化氧化喹啉体系的影响

董奔, 周明, 顾玉林, 姚大鹏, 董鑫, 金同发, 陈俊羽, 杨文银

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Effect of SO₄^2- on catalytic ozonation of quinoline over MnCe_xO_y

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Received		Published
2022-11-15		2023-09-20
Issue Date	Revised Date
2023-09-11	2022-11-15

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摘要

采用水热法制备了α-MnO₂基催化剂MnCe_xO_y，探究了SO₄^2-对MnCe_xO_y臭氧催化氧化喹啉体系的影响。结果表明，SO₄^2-的引入对体系产生抑制作用，喹啉和COD的去除率分别下降21.19%、21.19%。同时SO₄^2-的引入降低了催化剂的比表面积和孔容，使固液气三相不能充分接触；抑制氧空位和电子转移在反应过程中发挥作用，从而抑制活性物种的产生，最终导致MnCe_xO_y臭氧催化氧化喹啉的效能降低。

Abstract

MnCe_xO_y, an α-MnO₂-based catalyst, is prepared via hydrothermal synthesis method.On this basis, the effect of SO₄^2- on the catalytic ozonation of quinoline by MnCe_xO_y is evaluated.It is found that the addition of SO₄^2- inhibits the efficiency of the system, making the removal rates of quinoline and COD decrease by 21.19% both.Meanwhile, the addition of SO₄^2- reduces the specific surface area and pore volume of the catalyst, leading to the insufficient contact between solid-liquid-gas phases.Also, it inhibits the role of oxygen vacancies and electron transfer in the reaction, thereby inhibiting the generation of active species, and finally lead to the decreased efficiency of MnCe_xO_y in catalytic oxidation of quinoline.