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Mesoporous K/Fe-Al-O nanofibers by electrospinning of solution precursors

机译：溶液前体的电纺中孔K / Fe-Al-O纳米纤维

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摘要

Nanometer-sized fibers are recently getting increased attention in heterogeneous catalysis due to the superior transport properties and effective dispersion they offer. A key challenge in this application is creation of nanofibers with internal open porosity that can provide larger accessible catalytic surface and easier mass transport into the fibers. The synthesis of potassium doped iron/aluminum oxides ceramic nanofibers with mesoporous structure is presented herein. Uniform fiber mats were prepared by electrospinning (ES) using two different precursors: an aqueous solution of metal nitrates and an organic solution of metal acetylacetonates. The organic precursors gave rise to a promising mesoporous structure with fibers diameter mainly in the 300-400 nm range. Precursor viscosity was used as a stability indicator and its influence on the ES process was studied. Collection efficiency of as high as 90% was achieved. The increased understanding in fiber morphological evolution can open new possibilities in heterogeneous catalysis.
机译：纳米尺寸的纤维由于其优异的传输性能和有效的分散性，最近在非均相催化中得到越来越多的关注。在该应用中的关键挑战是创建具有内部开放孔隙率的纳米纤维，该纳米纤维可提供更大的可及催化表面，并更容易将其质量转移到纤维中。本文介绍了具有介孔结构的掺钾铁/铝氧化物陶瓷纳米纤维的合成。使用两种不同的前体通过静电纺丝（ES）制备均匀的纤维毡：金属硝酸盐的水溶液和金属乙酰丙酮化物的有机溶液。有机前体产生具有希望的介孔结构，其纤维直径主要在300-400nm范围内。前体粘度用作稳定性指标，并研究其对ES过程的影响。收集效率高达90％。对纤维形态演变的日益了解可以为非均相催化开辟新的可能性。

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  • 来源
    《Journal of Materials Research》 |2015年第20期|3142-3150|共9页
  • 作者

    Victor Halperin; Gennady E. Shter; Vadim Beilin; Gideon S. Grader;

  • 作者单位

    Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel;

    Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel;

    Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel;

    Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel;

  • 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
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