化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (9) : 179-184. DOI: 10.19817/j.cnki.issn1006-3536.2022.09.036

科学研究

超声协同MoS₂/g-C₃N₄活化过硫酸盐降解二甲基亚砜的研究

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Degradation of DMSO by ultrasonic synergistic MoS₂/g-C₃N₄ activated persulfate

Zhu Jia¹, Song Hui², Gao Min^3,4, Gao Jingsi¹

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Received		Published
2021-05-10		2022-09-20
Issue Date	Revised Date
2022-09-27	2021-05-10

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摘要

采用水热法制备了MoS₂/g-C₃N₄催化剂,以二甲基亚砜(DMSO)为目标污染物,对比不同反应体系下(过硫酸盐体系、超声体系、超声协同活化过硫酸盐体系) DMSO的去除效果。探究了MoS₂/g-C₃N₄催化剂在超声协同活化过硫酸盐体系中,催化剂投加量、过硫酸盐浓度、超声功率、反应体系的pH及不同离子对DMSO去除效果的影响。确定了降解DMSO的最佳条件为:pH=3.13,DMSO浓度20mg/L,催化剂投加量0.5g/L,过硫酸盐浓度6mmol/L的条件下,DMSO的去除率在60min时可达到100%,SO₄·^-与·OH是该体系中的主要反应自由基。系统考察了催化剂的重复利用性和稳定性。

Abstract

MoS₂/g-C₃N₄ catalyst was prepared by hydrothermal method,and the removal effect of dimethyl sulfoxide(DMSO)was compared in different reaction systems (persulfate system,ultrasonic system,and ultrasonic co-activated persulfate system) using dimethyl sulfoxide (DMSO) as the target pollutant.The effects of catalyst dosage,persulfate concentration,ultrasonic power and different ions on DMSO removal efficiency of MoS₂/g-C₃N₄ catalyst in ultrasound assisted activation of persulfate system were investigated.The optimum conditions for DMSO degradation were determined as follows:pH=3.13,DMSO concentration of 20mg/L,the catalyst dosage of 0.5g/L,and persulfate concentration of 6mmol/L.The removal rate of DMSO reached 100% at 60min,and SO₄·^-and ·OH were the main reactive radicals in the system.The reusability and stability of the catalyst were systematically investigated.A new idea for the degradation of refractory organic pollutants by ultrasonically co-activated persulfate system was provided.

关键词

二硫化钼 / g-C₃N₄ / 超声降解 / 过硫酸盐

Key words

MoS₂ / g-C₃N₄ / ultrasonic degradation / persulfate

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超声协同MoS₂/g-C₃N₄活化过硫酸盐降解二甲基亚砜的研究[J]. 化工新型材料, 2022, 50(9): 179-184 DOI:10.19817/j.cnki.issn1006-3536.2022.09.036

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基金资助

深圳市科技创新委员会项目“污泥动态成核电镀废水低排放技术应用示范”(Grand No.KJYY2018020618037010);深圳职业技术学院配套项目“难降解电镀废水精准预氧化-生物强化技术及微生物代谢机制研究”(6020320003K);广东省教育厅项目“城市智慧水污染防治技术开发中心”(2019GGCZX007)

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