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Silver nanoparticles on carboxyl-functionalized Fe3O4 with high catalytic activity for 4-nitrophenol reduction

机译:羧基官能化Fe3O4上的银纳米颗粒,具有高催化活性的4-硝基苯酚还原

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摘要

Ag nanoparticles deposited on polymer-coated magnetic Fe3O4 were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) equipped with an energy dispersive spectroscope (EDS), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). The magnetic and suspension properties of the nanoparticles were investigated by monitoring the change of absorbance versus time at 560 nm. The nanocomposites showed high catalytic activity in the reduction of 4-nitrophenol by NaBH4 (with conversion of 100% in 10 s). To the best of our knowledge, this is the shortest time for the conversation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) reported in the literatures, so far. The turnover frequency (TOF) is 17.06 min(-1), much larger than those of other catalysts in the literatures. Furthermore, the nanoparticles could be easily recovered by a magnet and the strong catalytic activity was well maintained after three cyclic treatments.
机译:沉积在聚合物涂覆的磁Fe3O4上的Ag纳米粒子被傅里叶变换红外光谱(FTIR),热重分析(TGA),透射电子显微镜(TEM)配备有能量分散光谱仪(EDS),高分辨率透射电子显微镜(HRTEM)和X射线光电子能谱(XPS)。通过监测560nm的吸光度变化与时间的变化来研究纳米颗粒的磁性和悬浮性能。纳米复合材料在NaBH 4通过4-硝基苯酚的还原的高催化活性(10秒内为100%)。据我们所知,这是迄今为止在文献中报告的4-硝基苯酚(4-NP)对4-氨基酚(4-AP)的最短时间。周转频率(TOF)是17.06分钟(-1),比文献中的其他催​​化剂大得多。此外,纳米颗粒可以通过磁体容易地回收,并且在三个环状处理后,耐强催化活性很好地保持。

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  • 来源
    《RSC Advances》 |2015年第62期|共7页
  • 作者单位

    Wuhan Univ Sci &

    Technol Coll Chem Engn &

    Technol Wuhan Peoples R China;

    Ohio State Univ Dept Mat Sci &

    Engn Columbus OH 43210 USA;

    Wuhan Inst Technol Coll Chem &

    Environm Engn Wuhan 430073 Peoples R China;

    Wuhan Inst Technol Coll Chem &

    Environm Engn Wuhan 430073 Peoples R China;

    Wuhan Inst Technol Coll Chem &

    Environm Engn Wuhan 430073 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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