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Ce-Doped zero-valent iron nanoparticles as a Fenton-like catalyst for degradation of sulfamethazine

机译：CE掺杂的零价铁纳米粒子作为亚磺酰甲嘧啶的降解的芬顿催化剂

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摘要

Ce-Doped zero-valent iron (Ce/Fe) nanoparticles were prepared, characterized and used as a catalyst for degradation of sulfamethazine (SMT) antibiotics in a Fenton-like process. High resolution transmission electron microscopy (TEM), emission scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman and Fourier transform infrared (FTIR) spectroscopy were used to characterize the catalyst before and after use. The influencing factors on the degradation of sulfamethazine were determined, including pH value, H2O2 dosage, catalyst dosage and temperature. The results showed that Ce/Fe composites exhibited high catalytic activity in a wide pH range (4-7). The removal efficiency of SMT was almost 100% under optimal condition (pH = 6, T = 30 degrees C, 0.5 g L-1 catalyst and 12 mM H2O2). The degradation process of SMT conformed to a first-order kinetic model. The intermediates of SMT degradation were identified by Ion Chromatography (IC), the possible degradation pathway of SMT and the possible catalytic mechanisms of Ce/Fe composites were tentatively proposed.
机译：制备Ce掺杂的零价铁（CE / Fe）的纳米颗粒，其特征在于，用作在一类芬顿过程的磺胺二甲嘧啶（SMT）抗生素降解的催化剂。高分辨透射电子显微镜（TEM），发射扫描电子显微镜（SEM），X射线衍射（XRD），X-射线光电子能谱（XPS），拉曼和傅立叶变换红外（FTIR）光谱法被用来之前表征催化剂并在使用后。上磺胺二甲基嘧啶的降解的影响因素进行了测定，包括pH值，H 2 O 2剂量，催化剂用量和温度。结果表明，铈/ Fe复合在宽pH范围内（4-7）显示出高的催化活性。最佳条件下（pH = 6，T = 30℃，将0.5g L-1催化剂和12mM的H 2 O 2）下的SMT的去除效率几乎为100％。 SMT的降解过程符合一级动力学模型。 SMT降解的中间体通过离子色谱法（IC），进行了初步提出SMT和Ce / Fe复合材料的可能的催化机制的可能降解途径鉴定。

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  • 来源
    《RSC Advances》 |2016年第105期|共9页
  • 作者

    Wan Zhong; Wang Jianlong;

  • 作者单位

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl Energy Technol INET Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl Energy Technol INET Beijing 100084 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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