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普鲁士蓝@酵母菌催化剂的合成及其Fenton性能
摘要点击 162  全文点击 36  投稿时间:2017-12-09  修订日期:2018-02-23
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中文关键词  普鲁士蓝  酵母  荧光增白剂  Fenton反应  协同效应
英文关键词  Prussian blue  yeast  fluorescent whitening agent  Fenton reaction  synergistic effect
作者单位E-mail
陈思 长安大学旱区地下水文与生态效应教育部重点实验室, 西安 710054 chensi0501@126.com 
白波 长安大学旱区地下水文与生态效应教育部重点实验室, 西安 710054
中国科学院西北高原生物研究所, 西宁 810001 
baibochina@163.com 
王洪伦 中国科学院西北高原生物研究所, 西宁 810001  
索有瑞 中国科学院西北高原生物研究所, 西宁 810001  
中文摘要
      自组装合成普鲁士蓝@酵母菌(PB@yeast)非均相Fenton催化剂,场发射扫描电镜(FE-SEM)、能量色谱(EDS)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)等表征结果表明PB纳米颗粒成功负载于酵母菌表面,形成稳定且高度分散的核壳结构复合微球;荧光增白剂CXT降解实验结果证明该复合微球兼备吸附与Fenton催化性能,酵母菌载体的吸附作用加快了废水中荧光增白剂CXT向催化剂活性位点的转移,促进Fe-Fe电子传递,显著提高了Fenton反应催化活性,酵母载体增强了PB纳米粒子的分散度与稳定性,有效解决PB纳米催化剂易团聚、易溶解的问题.PB@yeast催化剂经循环使用4次后对荧光增白剂CXT的去除效率无明显下降,表现出较好的催化效果和稳定性能.
英文摘要
      A novel heterogeneous Fenton catalyst, Prussian blue@yeast (PB@yeast), was prepared via facile self-assembly synthesis. The as-synthesized composite was characterized by field emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), powder X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). All of the results indicated that PB nanoparticles were uniformly dispersed on the surface of yeasts with stable core-shell morphology. Degradation of the model anionic fluorescent whitening agent CXT indicated that the PB@yeast catalyst presented a synergistic effect of adsorption and heterogeneous Fenton performance. Owing to the high adsorption capacity of yeast, the CXT molecules were easy to move to the active site of the catalyst, promoting the electron transfer between Fe(Ⅲ) and Fe(Ⅱ) and then enhancing the catalytic activity of the Fenton reaction effectively. Furthermore, the yeast support could improve the dispersity and stability of PB nanoparticles, which maintained excellent catalytic activity and stability after being recycled four times.

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