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首页> 外文期刊>Crystal growth & design >Growth mechanism of shape-controlled barium titanate nanostructures through soft chemical reaction
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Growth mechanism of shape-controlled barium titanate nanostructures through soft chemical reaction

机译：形状可控的钛酸钡纳米结构通过软化学反应的生长机理

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摘要

Morphology-control led barium titanate (BaTiO3) nanostructures, from single-crystal nanorods to nanoparticles, were synthesized by tuning the reaction time of a soft chemical process. Based on the morphology change of the nanostructures, the growth mechanism of the shape-con trolled BaTiO3 nanostructures by the soft chemical reaction method was suggested. With the reaction time of 42 h, single-crystal BaTiO3 nanorods with flat surface of facets and defined crystal axis were obtained. As the reaction time was extended to 50 h, a certain volume of nanorods converted to nanoparticles generated by a redissolution-growth reaction. When the reaction time was further elongated to 72 h, the volume of nanoparticles in the product notably increased with single grains of particles that have diameters up to similar to 200 nm. It was determined that an ion exchange and the structural transformation from the layer structure of the precursor into the perovskite structure prevailed at an early stage of the soft chemical reaction, and then the nanorods changed to nanoparticles due to the redissolution-growth reaction for reaction times over 42 h.
机译：通过调整软化学过程的反应时间，合成了形态控制的钛酸钡（BaTiO3）纳米结构，从单晶纳米棒到纳米颗粒。根据纳米结构的形貌变化，提出了通过软化学反应法控制形状的BaTiO3纳米结构的生长机理。反应时间为42 h，得到具有平坦小平面且晶轴确定的单晶BaTiO3纳米棒。随着反应时间延长至50小时，一定体积的纳米棒转化为通过再溶解-生长反应生成的纳米颗粒。当反应时间进一步延长至72小时时，产品中纳米颗粒的体积显着增加，而单个颗粒的直径最大可达200​​ nm。已确定在软化学反应的早期阶段发生了离子交换和从前体的层状结构到钙钛矿结构的结构转变，然后由于反应时间的再溶解-生长反应，纳米棒变成了纳米颗粒。超过42小时

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