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首页> 外文期刊>Crystal growth & design >Simultaneous Controlled Seeded-Growth and Doping of ZnO Nanorods with Aluminum and Cerium: Feasibility Assessment and Effect on Photocatalytic Activity
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Simultaneous Controlled Seeded-Growth and Doping of ZnO Nanorods with Aluminum and Cerium: Feasibility Assessment and Effect on Photocatalytic Activity

机译：铝和铈的同时控制ZnO纳米棒的种子生长和掺杂：可行性评估及对光催化活性的影响

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Doped and undoped ZnO nanorods (ZnO-NRs) are highly investigated materials for their numerous applications in catalysis, in optoelectronics, and in analytical chemistry. Seeded growth using well-defined ZnO nanomaterials represents a useful approach to control the size and morphology of undoped ZnO-NRs; however, the possibility to use such a strategy to produce size-defined doped ZnO-NRs was not previously investigated. In this work, we show that it is possible to prepare aluminum- and cerium-doped ZnO-NRs with well-defined length and diameter by a controlled hydrolytic seeded growth. The synthesized materials were characterized by various analytical techniques such as XPS, EDS, SEM/EDS, XRD, Raman, UV-vis, and photoluminescence (PL), which evidenced the correlation between the loading of dopant, the morphology of the nanorods, their optoelectronic properties, and the amount and nature of lattice defects. Given its smaller ionic radius, the doping with aluminum was more efficient than with cerium. Indeed, for the latter element, dopant concentrations above a certain threshold led to phase separation and coprecipitation of ceria particles during synthesis. In addition, the effect of our preparation strategy on the photocatalytic activity of doped and undoped ZnO-NRs was investigated by studying the photodegradation of methyl orange (MO) under UV light. The study revealed that aluminum-doped ZnO-NRs generally performed better than cerium-doped ZnO-NRs and that moderate aluminum concentrations could lead to an improvement of the photocatalytic performance compared to undoped ZnO-NRs, an observation that could be related to the occurrence and abundance of specific defect sites in the lattice.
机译：掺杂和未掺杂的ZnO纳米棒（ZnO-NRS）是对催化作用，光电子和分析化学的许多应用的高度研究。使用明确定义的ZnO纳米材料的种子生长代表了控制未掺杂的ZnO-NRS的尺寸和形态的有用方法;然而，先前未研究使用这种策略来生产尺寸定义的掺杂ZnO-NRS的可能性。在这项工作中，我们表明可以通过受控水解种子生长制备具有明确的长度和直径的铝和掺杂铈掺杂的ZnO-NR。合成材料的特征在于各种分析技术，例如XPS，EDS，SEM / EDS，XRD，拉曼，UV-Vis和光致发光（PL），这显现了掺杂剂的负载，纳米棒的形态之间的相关性光电性质，以及晶格缺陷的数量和性质。鉴于其较小的离子半径，掺杂铝比铈更有效。实际上，对于后一种元素，在合成期间，在一定阈值之上的掺杂剂浓度导致了分离和共沉淀的二氧化铈颗粒。此外，通过研究UV光下的甲基橙（Mo）的光降解，研究了我们制备策略对掺杂和未掺杂的ZnO-NRS的光催化活性的影响。该研究表明，与未掺杂的ZnO-NRS相比，通常比铈掺杂的ZnO-NRS掺杂ZnO-NRS更好地表现优于铈掺杂的ZnO-NR，并且可以导致光催化性能的改善，与未掺杂的ZnO-NR相比，这是可能与发生有关的观察结果和晶格中的特定缺陷网站的丰富。

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  • 来源
    《Crystal growth & design》 |2020年第8期|共18页
  • 作者

    Del Gobbo Silvano; Poolwong Jitpisut; DElia Valerio; Ogawa Makoto;

  • 作者单位

    Vidyasirimedhi Inst Sci &

    Technol VISTEC Dept Mat Sci &

    Engn Sch Mol Sci &

    Engn Payupnai 21210 Wangchan Thailand;

    Vidyasirimedhi Inst Sci &

    Technol VISTEC Dept Mat Sci &

    Engn Sch Mol Sci &

    Engn Payupnai 21210 Wangchan Thailand;

    Vidyasirimedhi Inst Sci &

    Technol VISTEC Dept Mat Sci &

    Engn Sch Mol Sci &

    Engn Payupnai 21210 Wangchan Thailand;

    Vidyasirimedhi Inst Sci &

    Technol VISTEC Dept Chem &

    Biomol Engn Sch Energy Sci &

    Engn Payupnai 21210 Wangchan Thailand;

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  • 中图分类 晶体学;
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