原位生长MoS2@CF助催化芬顿降解左氧氟沙星与反应器研究
In-situ growth of MoS2@CF cocatalyst for enhanced Fenton degradation of levofloxacin and reactor study
王尧 1肖纯 1时悦悦 1刘敬妤 1朱枭强 2王国彬 2谢洁云 2胡勇有1
作者信息
- 1. 华南理工大学环境与能源学院,广州 511400
- 2. 广州鹏凯环境科技股份有限公司,广州 511400
- 折叠
摘要
采用一步水热法原位生长将MoS2附着碳毡纤维上,制备了MoS2@CF复合助催化剂并用于助催化芬顿反应.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)等表征方法对复合催化剂的结构、形貌和元素价态进行表征.以左氧氟沙星(LFX)为降解对象,研究了MoS2@CF/Fenton体系中pH、亚铁投加量、助催化剂投加量、H2O2浓度以及初始污染物浓度等因素对LFX的降解影响.在最佳条件下,反应30 min后,LFX的降解率高达91.8%.碳毡的引入,使得复合催化剂避免了传统粉末催化剂实际使用中的流失.以MoS2@CF特性为基础构建了外循环悬挂式填料反应器,经过15 d的连续反应,对模拟废水中的LFX(累计100 mg·L-1)的降解率维持在90%.
Abstract
Using one-step hydrothermal method,MoS2 was attached to carbon felt fibers in situ to prepare the MoS2@CF composite catalyst for use as a cocatalyst in the Fenton reaction.The structure,morphology,and element valence states of the composite catalyst were characterized by various methods including X-ray diffraction(XRD),scanning electron microscopy(SEM),and X-ray photoelectron spectroscopy(XPS).Taking levofloxacin(LFX)as the degradation target,the effects of factors such as pH,ferrous ion dosage,cocatalyst dosage,H2O2 concentration,and initial pollutant concentration on the degradation of LFX in the MoS2@CF/Fenton system were studied.Under the optimal conditions,the degradation rate of LFX reached 91.8%after 30 minutes of reaction.The introduction of carbon felt allows the composite catalyst to avoid loss during the practical use of traditional powder catalysts.Based on the characteristics of MoS2@CF,external circulation suspension-packing reactors was constructed.After 15 days of continuous reaction,the degradation rate of LFX(accumulated to 100 mg·L-1)in the simulated wastewater remained at 90%.
关键词
二硫化钼/碳毡/助催化芬顿/反应器/左氧氟沙星Key words
MoS2/carbon felt/co-catalytic fenton/reactor/levofloxacin引用本文复制引用
出版年
2025
NETL
NSTL
万方数据