Synthesis and Structural Analysis of LDH-SO₄-CO₃ Whisker

Abstract

High-quality LDH-SO₄-CO₃ whiskers were synthesized via liquid precipitation method using MgSO₄·7H₂O and Al₂(SO₄)₃·18H₂O as precursors and Na₂CO₃-NaHCO₃ buffer solution as precipitant. The influence of buffer solution concentration on the characteristics of the samples was investigated. The as-grown whiskers were characterized by X-ray diffraction, transmission electron microscopy, and Brunauer-Emmett-Teller N₂ specific surface area measurements. The results show that the buffer solution concentration has significant impact on whiskers with intercalated structure. The LDH-SO₄-CO₃ whiskers with well-defined geometry, distinct intercalated structure, decent quality, and excellent dispersing capability can be obtained under the following conditions: buffer solution volume ratio of 45%, reaction temperature of 83°C, and reaction time of 182 h. The obtained whiskers are well-crystallized and exhibit homogeneous morphology consisting of fber bars.

Keywords

whiskers / LDH-SO₄-CO₃ / synthesis / structural analysis

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