前躯体法制备四氧化三铁及其催化性能(急)
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Preparation of Iron Oxide by Precursor Method and Its Catalytic Performance
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    摘要:

    以钛白副产品FeSO4为原料,采用前躯体法制备了Fe3O4(记为Fe3O4-PR),并将其作为催化剂催化H2O2降解活性艳红X-3B。考察了pH、H2O2投加量、Fe3O4-PR投加量等对该催化降解反应的影响及Fe3O4-PR催化活性及稳定性。最后对该催化降解反应机理进行了初步探究。XRD、FT-IR、SEM、粒径分析等结果表明,采用前躯体法可成功制备出平均粒径为410nm的多面立体结构Fe3O4。在pH=3、H2O2投加量为3 mM及Fe3O4-PR投加量为1g/L的条件下,活性艳红X-3B的降解率可达97%,TOC去除率为47%。Fe3O4-PR不仅具有良好的稳定性,且催化活性优于传统化学共沉淀法制备的Fe3O4(记为Fe3O4-CO)。机理探究表明催化降解反应是在催化剂表面的活性位点发生,降解过程存在氧化还原循环,?OH是主要活性物质。

    Abstract:

    Fe3O4(named as Fe3O4-PR) was prepared by the precursor method from FeSO4 ,a byproduct of titanium dioxide, and it was used as a catalyst to catalyze the degradation of active brilliant red X-3B by H2O2. The effects of pH, H2O2 dosage and Fe3O4-PR dosage on the catalytic degradation reaction were investigated. And it was explored that the catalytic activity and stability of Fe3O4-PR. Finally, the mechanism of the catalytic degradation reaction was investigated. XRD, FT-IR, SEM and particle size analysis showed that the multi-faceted three-dimensional structure Fe3O4 with an average particle size of 410 nm could be successfully prepared by the precursor method. Under the conditions of pH=3, H2O2 dosage of 3 mM and Fe3O4-PR dosage of 1g/L, the degradation rate of reactive brilliant red X-3B was 97%, and the TOC removal rate was 47%. Fe3O4-PR not only has good stability, but also has better catalytic activity than Fe3O4(namedasFe3O4-CO) prepared by traditional chemical coprecipitation. The mechanism investigation shows that the catalytic degradation reaction occurs at the active site on the catalyst surface, and the redox cycle exists in the degradation process. ?OH is the main active material.

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计宏益,李明玉,翁畅成.前躯体法制备四氧化三铁及其催化性能(急)[J].精细化工,2020,37(2):

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  • 收稿日期:2019-09-25
  • 最后修改日期:2019-11-28
  • 录用日期:2019-12-02
  • 在线发布日期: 2020-01-10
  • 出版日期: