Fe-MOF-74前体制备铁-碳/氮复合材料及其活化过硫酸盐性能
Preparation of Fe-carbon/nitrogen composites from Fe-MOF-74 precusor and its performance in activating peroxymonosulfate
张林 1张子怡 1李勇 1童少平1
作者信息
- 1. 浙江工业大学化学工程学院,浙江 杭州 310032
- 折叠
摘要
利用Fe-MOF-74和g-C3N4前体制备了复合材料铁-碳/氮(记为Fe-MOF-C/N),并研究了其活化过硫酸氢钾(PMS)的性能.XRD、SEM和XPS分析表明,Fe-MOF-C/N呈多孔状结构,主要由物相Fe3N、C0.08Fe1.92和石墨组成.利用Fe-MOF-C/N活化PMS降解双酚A(BPA)结果表明,与前期的Fe-C/N-0.5∶1(由FeC2O4和g-C3N4制备)相比,Fe-MOF-C/N具有更优异的催化性能,相同条件下Fe-MOF-C/N/PMS对BPA的降解率达95.21%(6 min),比Fe-C/N-0.5∶1/PMS高30.4%.优化相应的实验条件后,6 min内BPA的化学需氧量(COD)去除率达59.72%.自由基猝灭实验表明,Fe-MOF-C/N/PMS的活性物种主要是 1O2.稳定性实验表明Fe-MOF-C/N稳定性较好,使用5次后,BPA的降解率仅下降9.0%,应用前景良好.
Abstract
The composite Fe-carbon/nitrogen(Fe-MOF-C/N)was prepared from the precusors of Fe-MOF-74 and g-C3N4 and its performance in activating peroxymonosulfate(PMS)was studied.The results of XRD,SEM and XPS analysis showed that Fe-MOF-C/N had a porous structure and was mainly composed of Fe3 N,C0.08 Fe1.92 and graphite.The results of using Fe-MOF-C/N to activate PMS to degrade bisphenol A(BPA)show that compared with the previous Fe-C/N-0.5:1(prepared from FeC2O4 and g-C3N4),Fe-MOF-C/N has better catalytic performance.The degradation rate of BPA by Fe-MOF-C/N/PMS under the same conditions reaches 95.21％(6 min),which is 30.4％higher than Fe-C/N-0.5:1/PMS.The chemical oxygen demand(COD)removal rate of BPA reached 59.72％within 6 min under the optimized experimental conditions.Free radical quenching experiments showed that 1 O2 was the main active species in Fe-MOF-C/N/PMS.The recycle tests indicated Fe-MOF-C/N had a good stability,the degradation rate of BPA only decreased by 9.0％in 5 runs,implying it has a good application prospect.
关键词
高级氧化/活化/过硫酸氢钾/降解/复合材料/金属有机框架Key words
advanced oxidation/activation/peroxymonosulfate/degradation/composites/metal-organic framework引用本文复制引用
基金项目
浙江省自然科学基金(LY18B060013)
出版年
2024
国家科技期刊平台
NSTL
万方数据