Regulation of the Ba/Sr Ratio of (Ba,Sr)TiO3 and Nanorod Build‐Up through a Topochemical Synthesis Method Using BaTi2O5 as the Template,European Journal of Inorganic Chemistry

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Regulation of the Ba/Sr Ratio of (Ba,Sr)TiO3 and Nanorod Build‐Up through a Topochemical Synthesis Method Using BaTi2O5 as the Template
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-07-03 , DOI: 10.1002/ejic.201800324
Jing Fu ₁ , Yudong Hou ₁ , Mupeng Zheng ₁ , Mankang Zhu ₁

Affiliation

One‐dimensional (1D) nano‐ferroelectrics have important applications in the electronics industry, and their high‐quality synthesis has attracted a great deal of interest in the field of the chemistry of materials. In this work, single‐crystal perovskite (Ba_0.5,Sr_0.5)TiO₃ nanorods have been prepared by a topochemical molten‐salt synthesis (TMSS) method. The conversion process and the topochemical mechanism have been investigated, on the basis of XRD, SEM, and TEM analyses. The TMSS method contains two main steps. In the first step, 1D BaTi₂O₅ nanocrystals are synthesized in a molten environment. In the second step, using these BaTi₂O₅ monoclinic nanorods as templates, (Ba_0.5,Sr_0.5)TiO₃ perovskite nanorods are constructed through a topochemical reaction. The results reveal that the 1D morphology of (Ba_0.5,Sr_0.5)TiO₃ can be maintained over a wide temperature range, between 800 °C and 1000 °C. Using the 1D BaTi₂O₅ as a template, the 1D morphology of (Ba_x,Sr_1–x)TiO₃ (x = 0.5–1) can be obtained at 900 °C, and the 1D morphology is almost independent of the Ba/Sr ratio. In addition, changing the combination of the A‐site complex ions significantly affects the morphology of the product. For (Ba,Ca)TiO₃, the product is assembled in a 1D direction by nanoparticles, not regular nanorods. This TMSS method is facile and can be developed to construct other orientated functional materials.

中文翻译：

以BaTi2O5为模板的化学合成方法调控（Ba，Sr）TiO3的Ba / Sr比和纳米棒的形成

一维（1D）纳米铁电体在电子工业中具有重要的应用，其高质量的合成方法在材料化学领域引起了极大的兴趣。在这项工作中，通过拓扑化学熔融盐合成（TMSS）方法制备了单晶钙钛矿（Ba _0.5，Sr _0.5）TiO ₃纳米棒。在XRD，SEM和TEM分析的基础上，对转化过程和拓扑化学机理进行了研究。TMSS方法包含两个主要步骤。第一步，在熔融环境中合成一维BaTi ₂ O ₅纳米晶体。第二步，使用这些BaTi ₂ O ₅通过拓扑化学反应构建了以单斜晶纳米棒为模板的（Ba _0.5，Sr _0.5）TiO ₃钙钛矿纳米棒。结果表明，（Ba _0.5，Sr _0.5）TiO ₃的一维形态可以在800°C至1000°C的宽温度范围内保持。以一维BaTi ₂ O ₅为模板，（Ba _x，Sr _{1- x}）TiO ₃（x= 0.5-1）可以在900°C的温度下获得，而一维形态几乎与Ba / Sr比无关。另外，改变A位络合物离子的组合会显着影响产物的形态。对于（Ba，Ca）TiO ₃，产品是通过纳米颗粒而不是规则的纳米棒沿一维方向组装的。这种TMSS方法很容易，可以开发用于构建其他定向功能材料。

更新日期：2018-07-03

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