Jump to main content
Jump to site search


Hierarchical Spheres of Mg-Al LDH for Removal of Phosphate Ions: Effect of Alumina Polymorph as Precursor

Abstract

In order to tailor the morphology of the layered double hydroxides (LDHs) particles, we focused on a synthesis method that involves the use of Al2O3 as a precursor, employing Al2O3 with different crystal structures (e.g., α-Al2O3, θ-Al2O3, and γ-Al2O3) as well as amorphous Al2O3. When θ-Al2O3 and γ-Al2O3 were used, a three-dimensional network of plate-shaped LDH particles was formed even though α-Al2O3 barely reacts to form the LDH phase. Finally, adsorption tests involving HPO42− ions confirmed that the fabricated LDH particles exhibited high ion-removal rates. Hydrogen phosphate ions (HPO42−) in a concentration of 0.40 mmol g−1 could be removed completely within 10 min using the LDH particles prepared with θ-γ-Al2O3 and γ-γ-Al2O3; this is approximately 20 times shorter than the time taken by the LDH particle prepared from amorphous γ-Al2O3.

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jul 2019, accepted on 03 Oct 2019 and first published on 07 Oct 2019


Article type: Paper
DOI: 10.1039/C9CE01064E
CrystEngComm, 2019, Accepted Manuscript

  •   Request permissions

    Hierarchical Spheres of Mg-Al LDH for Removal of Phosphate Ions: Effect of Alumina Polymorph as Precursor

    T. Sudare, A. Zenzai, S. Tamura, M. Kiyama, F. Hayashi and K. Teshima, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE01064E

Search articles by author

Spotlight

Advertisements