化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (2) : 192-197. DOI: 10.19817/j.cnki.issn1006-3536.2023.02.039

科学研究

MoS₂@TiO₂/CNFs复合材料活化PMS快速去除有机污染物的研究

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MoS₂@TiO₂/CNFs composite activated PMS for rapid removal of organic pollutants

Liu Bo^1,2, Wang Xiaodong¹, Yu Xiang², Li Yue², Xue Susu², Song Guangqiang³

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Received		Published
2021-09-16		2023-02-20
Issue Date	Revised Date
2023-03-01	2021-09-16

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摘要

MoS₂能否高效激发过硫酸盐(PMS)产生高氧化性的过硫酸根基,很大程度上取决于MoS₂纳米片上活性边缘的数量。将MoS₂纳米片垂直生长在TiO₂基底上,能够充分暴露MoS₂的活性位点。通过静电纺丝、碳化和水热法成功地在TiO₂碳纤维上近垂直生长MoS₂纳米片,得到MoS₂@TiO₂/CNFs复合材料。在光照条件下,MoS₂@TiO₂/CNFs复合材料活化PMS后,对亚甲基蓝(MB)的降解率达到97.1%,比仅使用MoS₂@TiO₂/CNFs的催化体系降解速率提升4倍。连续循环5次后,降解率仍能保持在84.8%。以上结果说明MoS₂@TiO₂/CNFs复合材料具有优异的光催化性能和较高的稳定性。

Abstract

Whether molybdenum disulfide (MoS₂) can efficiently stimulate persulfate (PMS) to produce highly oxidizing persulfate base ·SO^-₄ depends greatly on the number of active edges on MoS₂ nanosheets.The active site of MoS₂ can be fully exposed by vertically growing MoS₂ nanosheets on titanium dioxide (TiO₂) substrate.In this paper,MoS₂@TiO₂/CNFs composites were prepared by successfully growing MoS₂ near-vertical on TiO₂ carbon fiber by electrostatic spinning,carbonization and hydrothermal methods.Under light radiation,the degradation rate of methylene blue (MB) reached 97.1% by MoS₂@TiO₂/CNFs composite activated PMS,which was 4 times higher than that of catalytic system without PMS.After 5 consecutive cycles,the degradation rate still remained at 84.8%.The results showed that MoS₂@TiO₂/CNFs composite had excellent photocatalytic performance and high stability.

关键词

二硫化钼 / 单过硫酸盐 / 垂直生长 / 异质结

Key words

molybdenum disulfide / monopersulfate / vertical growth / heterojunction

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MoS₂@TiO₂/CNFs复合材料活化PMS快速去除有机污染物的研究[J]. 化工新型材料, 2023, 51(2): 192-197 DOI:10.19817/j.cnki.issn1006-3536.2023.02.039

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