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Toshiaki Yoshioka
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Volume 31 Issue 4 August 2008 pp 625-629 Synthesis
Tomohito Kameda Toshiaki Yoshioka Fumiko Yabuuchi Miho Uchida Akitsugu Okuwaki
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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Bulletin of Materials Science
Volume 46, 2023
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Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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