Synthesis of Li-Al-carbonate layered double hydroxide in a metal salt-free system

Meng Chang Lin, Fu Tsung Chang, Jun Yen Uan

研究成果: 雜誌貢獻文章同行評審

26 引文 斯高帕斯(Scopus)

摘要

This work describes a novel method based on a metal salt-free system to synthesize a Li-Al-CO3 layered double hydroxide (LDH) by simply adding powdered AlLi intermetallic compound (IMC) to a stirred water-bath at ambient temperature and atmosphere. The AlLi powder in the water-bath hydrolyzed strongly, subsequently forming an alkaline Al3+- and Li +-containing aqueous solution of pH 12.3. Additionally, dissolution of CO2 gas from the ambient atmosphere into the stirred alkaline solution produced the anion, CO32-, in the solution to form Li-Al-CO3 LDH. Washing in water was unnecessary because metal salts were not used to synthesize the LDH. Notably, transmission electron microscopy (TEM) results indicate that nano-sized Al particles were incorporated on the surface of Li-Al-CO3 LDH flakes. Chemical analysis data suggest that the chemical formula of Li-Al-CO3 LDH was Li 0.33Al0.67(CO3)0.17(OH) 2·mH2O. This work also investigates the removal of the fluoride ions from an aqueous solution by using Li-Al-CO3 LDH. Experimentally, residual fluoride concentration decreased to 0.4 ppm with an initial concentration of 20 ppm, which satisfies World Health Organization (WHO) guidelines for drinking water quality.
原文英語
頁(從 - 到)6524-6530
頁數7
期刊Journal of Materials Chemistry
20
發行號31
DOIs
出版狀態已發佈 - 8月 2010
對外發佈

ASJC Scopus subject areas

  • 化學 (全部)
  • 材料化學

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