Scholarlink

Abstract <p>High-entropy six-cation layered double hydroxides (LDHs) of cationic composition MgNiCoAlFeY were prepared by five different methods, namely, by coprecipitation at constant pH, coprecipitation at constant or variable pH followed by hydrothermal treatment, microwave-assisted solvothermal synthesis, hydrothermal synthesis, and mechanochemical synthesis followed by hydrothermal treatment. All samples, except for the one prepared by coprecipitation at variable pH, were phase-pure with a uniform distribution of cations. The samples were characterized by X-ray powder diffraction, IR spectroscopy, Raman spectroscopy, and transmission electron microscopy. Thermal transformations of the samples were studied. The synthesis method affected the characteristics of the samples. The sample prepared by hydrothermal synthesis at variable pH had magnetic properties. The largest particles having near-hexagonal shapes were formed by coprecipitation followed by hydrothermal treatment. The sample prepared by the microwave-assisted solvothermal method was distinguished by a lower thermal stability.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Preparation of High-Entropy Layered Double Hydroxides with the Hydrotalcite Structure

  • 期刊论文

  • 发表日期：

    2025年1月1日

查看全文
  • O. E. Lebedeva,
  • S. N. Golovin,
  • E. S. Seliverstov,
  • E. A. Tarasenko,
  • O. V. Kokoshkina,
  • D. E. Smalchenko,
  • M. N. Yapryntsev

摘要

Abstract

High-entropy six-cation layered double hydroxides (LDHs) of cationic composition MgNiCoAlFeY were prepared by five different methods, namely, by coprecipitation at constant pH, coprecipitation at constant or variable pH followed by hydrothermal treatment, microwave-assisted solvothermal synthesis, hydrothermal synthesis, and mechanochemical synthesis followed by hydrothermal treatment. All samples, except for the one prepared by coprecipitation at variable pH, were phase-pure with a uniform distribution of cations. The samples were characterized by X-ray powder diffraction, IR spectroscopy, Raman spectroscopy, and transmission electron microscopy. Thermal transformations of the samples were studied. The synthesis method affected the characteristics of the samples. The sample prepared by hydrothermal synthesis at variable pH had magnetic properties. The largest particles having near-hexagonal shapes were formed by coprecipitation followed by hydrothermal treatment. The sample prepared by the microwave-assisted solvothermal method was distinguished by a lower thermal stability.