• Toshiaki Yoshioka

      Articles written in Bulletin of Materials Science

    • Effects of pH and concentration on ability of Cl and NO$^{–}_{3}$ to intercalate into a hydrotalcite-like compound during its synthesis

      Tomohito Kameda Toshiaki Yoshioka Fumiko Yabuuchi Miho Uchida Akitsugu Okuwaki

      More Details Abstract Fulltext PDF

      In this study, we confirmed that the characteristics of anion intercalation into the interlayer of a hydrotalcite-like compound (HT) during synthesis are similar to those of the anion-exchange reaction of HTs as well as the reconstruction reaction of HTs from Mg–Al oxide. We demonstrated that

      Cl, which has a higher charge density than NO$^{–}_{3}$, more easily reacted with Mg and Al species to form HT structure, resulting in greater intercalation of Cl into the HT interlayer; and

      for HTs with lower Mg : Al molar ratios, OH, which has a higher charge density than Cl and NO$^{–}_{3}$, was more likely to interact with Mg and Al species to form HT structure, blocking the intercalation of Cl and NO$^{–}_{3}$.

      Furthermore, we showed that high concentrations of Cl and NO$^{–}_{3}$ in solution regulated their intercalation into the HT interlayer. The high activity of Cl and NO$^{–}_{3}$ in solution would facilitate the anions’ reactions with Mg and Al species to form HTs, resulting in a high degree of anion intercalation into the interlayer of HTs.

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      Posted on October 12, 2020

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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