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Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究

杨静文 方小峰 杨波

杨静文, 方小峰, 杨波. Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究[J]. 环境科学研究, 2023, 36(5): 965-974. doi: 10.13198/j.issn.1001-6929.2022.12.10
引用本文: 杨静文, 方小峰, 杨波. Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究[J]. 环境科学研究, 2023, 36(5): 965-974. doi: 10.13198/j.issn.1001-6929.2022.12.10
YANG Jingwen, FANG Xiaofeng, YANG Bo. Preparation and Study of Catalytic Properties of Mo Doped FeS2 Heterogeneous Fenton Catalysts[J]. Research of Environmental Sciences, 2023, 36(5): 965-974. doi: 10.13198/j.issn.1001-6929.2022.12.10
Citation: YANG Jingwen, FANG Xiaofeng, YANG Bo. Preparation and Study of Catalytic Properties of Mo Doped FeS2 Heterogeneous Fenton Catalysts[J]. Research of Environmental Sciences, 2023, 36(5): 965-974. doi: 10.13198/j.issn.1001-6929.2022.12.10

Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究

doi: 10.13198/j.issn.1001-6929.2022.12.10
基金项目: 国家重点研发计划项目(No.2019YFC0408503);上海市“科技创新行动计划”扬帆计划项目(No.20YF1400100);中央高校基本科研业务费专项资金项目(No.2232020D-54)
详细信息
    作者简介:

    杨静文(1999-),女,河南焦作人,3195635388@qq.com

    通讯作者:

    方小峰(1989-),男,安徽安庆人,讲师,博士,主要从事工业废水处理及资源化研究,fxf595@dhu.edu.cn

  • 中图分类号: X703

Preparation and Study of Catalytic Properties of Mo Doped FeS2 Heterogeneous Fenton Catalysts

Funds: National Key Research and Development Program of China (No.2019YFC0408503); Shanghai Sailing Program, China (No.20YF1400100); Fundamental Research Funds for the Central Universities, China (No.2232020D-54)
  • 摘要: 为提高FeS2活化H2O2降解有机物的性能,本研究通过引入多价金属钼(Mo)制备得到Mo掺杂的FeS2催化剂(FeS2@Mo),并用于催化降解水中双酚A (BPA). 通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)对样品形貌和结构组成等进行表征. 研究了H2O2浓度、FeS2@Mo投加量、初始pH等条件对BPA降解效果的影响. 结果表明:①Mo掺杂的FeS2呈现花瓣形球体,尺寸500~1 000 nm. ②在条件为5 mmol/L H2O2、100 mg/L FeS2@Mo、pH=3.5时降解效果最优,且在该条件下反应10 min时BPA的降解率可达99.1%. ③淬灭试验和电子顺磁共振(EPR)试验的结果表明,该体系中的活性物种包括羟基自由基(·OH)、单线态氧(1O2)和超氧自由基(·O2),其中·OH和1O2占据主导地位. ④Mo的掺杂有助于提高反应体系中Fe2+的比率,提高Fenton催化效率. 研究显示,Mo的掺杂成功地提高了FeS2的催化性能,可以高效地降解水中的BPA,具有潜在的应用前景.

     

  • 图  1  FeS2@Mo和FeS2的SEM图

    Figure  1.  SEM images of FeS2@Mo and FeS2

    图  2  FeS2@Mo的TEM表征

    Figure  2.  Characterization of FeS2@Mo

    图  3  FeS2@Mo和FeS2的XRD图

    Figure  3.  XRD patterns of FeS2@Mo and FeS2

    图  4  FeS2和FeS2@Mo的XPS谱图

    Figure  4.  XPS patterns of FeS2 and FeS2@Mo

    图  5  不同催化体系下BPA的降解效果

    注:试验条件为BPA初始浓度20 mg/L,催化剂用量100 mg/L,H2O2用量5 mmol/L,溶液初始pH 3.5.

    Figure  5.  The degradation of BPA in different catalytic systems

    图  6  催化剂投加量对BPA降解效果的影响

    Figure  6.  The effects of catalyst dosage on the degradation of BPA

    图  7  H2O2投加量对BPA降解效果的影响

    Figure  7.  The effects of H2O2 dosage on the degradation of BPA

    图  8  初始pH对BPA降解效果的影响

    Figure  8.  The effects of initial pH on the degradation of BPA

    图  9  FeS2@Mo循环次数对BPA降解的影响

    Figure  9.  The effects of recycle times of FeS2@Mo on the degradation of BPA

    图  10  FeS2@Mo反应前后的表征

    Figure  10.  Characterization of FeS2@Mo used before and after

    图  11  Cl和HA对BPA降解效果的影响

    Figure  11.  The effects of Cl and HA on the degradation of BPA

    图  12  淬灭试验和不同体系的EPR图谱

    Figure  12.  Quenching experiments and EPR spectra in different systems

    图  13  不同体系中Fe2+/Fe3+随反应时间(t)的变化

    Figure  13.  The change of Fe2+/Fe3+ with reaction time (t) in different systems

    图  14  FeS2@Mo和FeS2反应前后的XPS图谱

    Figure  14.  XPS spectra of FeS2@Mo and FeS2 used before and after reaction

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  • 收稿日期:  2022-09-04
  • 修回日期:  2022-12-18

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