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首页> 外文期刊>Materials Research Bulletin >Improved photocatalytic activities of recyclable porous Fe_2O_3 nanotubes by modifying with nano-sized SiO_2 and g-C_3N_4 for degrading 2-chlorophenol
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Improved photocatalytic activities of recyclable porous Fe_2O_3 nanotubes by modifying with nano-sized SiO_2 and g-C_3N_4 for degrading 2-chlorophenol

机译：通过用纳米大小的SiO_2和G-C_3N_4改变可回收多孔Fe_2O_3纳米管的光催化活性以降解2-氯苯酚

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摘要

It is highly desired to fabricate efficient alpha-Fe2O3-based photocatalysts with recyclable feature for pollutants degradation. Herein, porous alpha-Fe2O3 nanotubes with high photocatalytic activity for degrading 2-chlorophenol (2-CP) have been successfully synthesized by a phase separation electrospinning process, with a pipe diameter of about 200 nm. The photoactivity is greatly improved by in-situ introducing SiO2, attributed to the increased surface area by decreasing the size of nanoparticles shell from similar to 30 to 15 nm. Furthermore, the photoactivity of SiO2 modified alpha-Fe2O3 is further improved by coupling with porous g-C3N4 nanosheets, ascribed to the promoted charge separation by the newly accepted S-scheme charge transfer mainly based on the EPR tests and photo-current action spectra. Interestingly, the optimized alpha-Fe2O3-based nanotubes exhibit similar to 4-time improvement of the kinetic rate constant in 2-CP degradation compared with the reported alpha-Fe2O3 nanoparticles, with good recyclability by self-sediment.
机译：非常希望用可回收特征制造基于有效的α-Fe2O3的光催化剂，用于污染物降解。这里，通过相分离的电纺丝工艺成功地合成了具有高光催化活性的多孔α-Fe2O3纳米管，用于通过相分离的电刺纺丝工艺成功地合成，管直径为约200nm。通过原位引入SiO 2，通过降低纳米颗粒壳的尺寸从类似于30至15nm的尺寸来归因于增加的表面积的光活性。此外，通过与多孔G-C3N4纳米片偶联进一步改善SiO 2改性α-Fe 2 O 3的光接收，其通过新公认的S方案电荷转移赋予促进的S方案电荷转移来进一步提高，主要基于EPR测试和光电流作用光谱。有趣的是，与报道的α-Fe2O3纳米颗粒相比，优化的α-Fe2O3基纳米管表现出类似于2-CP降解中的动力速率恒定的4次改善。通过自身沉积物具有良好的再循环性。

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  • 来源
    《Materials Research Bulletin》 |2021年第10期|111416.1-111416.9|共9页
  • 作者

    Wenyu E.; Dou Tianwei; Zhu Yangyang; Liu Jingqiang; Jing Liqiang;

  • 作者单位

    Heilongjiang Univ Sch Chem & Mat Sci Int Joint Res Ctr Catalyt Technol Key Lab Funct Inorgan Mat Chem Minist Educ Harbin 150080 Peoples R China;

    Heilongjiang Univ Sch Chem & Mat Sci Int Joint Res Ctr Catalyt Technol Key Lab Funct Inorgan Mat Chem Minist Educ Harbin 150080 Peoples R China;

    Heilongjiang Univ Sch Chem & Mat Sci Int Joint Res Ctr Catalyt Technol Key Lab Funct Inorgan Mat Chem Minist Educ Harbin 150080 Peoples R China;

    Heilongjiang Univ Sch Chem & Mat Sci Int Joint Res Ctr Catalyt Technol Key Lab Funct Inorgan Mat Chem Minist Educ Harbin 150080 Peoples R China;

    Heilongjiang Univ Sch Chem & Mat Sci Int Joint Res Ctr Catalyt Technol Key Lab Funct Inorgan Mat Chem Minist Educ Harbin 150080 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Porous alpha-Fe2O3 nanotubes; Phase separation electrospinning; g-C3N4/alpha-Fe2O3 S-scheme nanocomposite; Charge transfer and separation; Photocatalytic degradation;

    机译：多孔α-Fe2O3纳米管;相分离电刺;G-C3N4 /α-Fe2O3 S-方案纳米复合材料;电荷转移和分离;光催化降解;

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