CIESC Journal ›› 2024, Vol. 75 ›› Issue (5): 1882-1889.DOI: 10.11949/0438-1157.20231263

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Preparation of Fe-carbon/nitrogen composites from Fe-MOF-74 precusor and its performance in activating peroxymonosulfate

Lin ZHANG(), Ziyi ZHANG, Yong LI, Shaoping TONG()   

  1. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
  • Received:2023-12-04 Revised:2024-01-17 Online:2024-06-25 Published:2024-05-25
  • Contact: Shaoping TONG

Fe-MOF-74前体制备铁-碳/氮复合材料及其活化过硫酸盐性能

张林(), 张子怡, 李勇, 童少平()   

  1. 浙江工业大学化学工程学院,浙江 杭州 310032
  • 通讯作者: 童少平
  • 作者简介:张林(1998—),男,硕士研究生,1345931471@qq.com
  • 基金资助:
    浙江省自然科学基金项目(LY18B060013)

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 Fe3N, C0.08Fe1.92 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 1O2 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.

Key words: advanced oxidation, activation, peroxymonosulfate, degradation, composites, metal-organic framework

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。

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

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