Articles
  • Morphology and size control of 513 MHSH, Mg(OH)2 from sea bittern using H2SO4 and NH4OH

  • Jiyeon Kima,b, HyunSeung Shima, YeongJo Yuna, Seong-Ju Hwangb and YooJin Kima,*

  • aEngineering Materials Center, Korea Institute of Ceramic Engineering and Technology, Icheon 17303, Republic of Korea
    bDepartment of Battery Engineering, Yonsei University, Seoul 03722, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

513 MHSH (Magnesium Hydroxide Sulfate Hydrate) and Mg(OH)2 were synthesized using a domestic resource, sea bittern, as a Mg precursor instead of conventional reagents. Sea bittern contains a large amount of Ca2+ ions, which can be efficiently removed using sulfuric acid. We synthesized them using the obtained MgSO4 solution from sea bittern. By adding ammonia to the MgSO4 solution to synthesize plate-like Mg(OH)2 and adjusting the Mg(OH)2/MgSO4 ratio by adjusting the amount of ammonia, needle-like 513 MHSH were synthesized. In addition, the synthesized hexagonal plate-like Mg(OH)2 was grown to a size of 50 to 400 nm by hydrothermal reaction. The conditions for synthesizing the needle-like 513 MHSH were found by the addition of sulfuric acid. The synthesized 513 MHSH and Mg(OH)2 were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM).


Keywords: Sea bittern, Mg(OH)₂, Magnesium, CaSO4, MgSO4 solution.

This Article

  • 2025; 26(4): 672-679

    Published on Aug 31, 2025

  • 10.36410/jcpr.2025.26.4.672
  • Received on Jun 3, 2025
  • Revised on Jul 6, 2025
  • Accepted on Jul 8, 2025

Correspondence to

  • YooJin Kim

  • Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology, Icheon 17303, Republic of Korea
    Tel : +82-31-645-1427 Fax: +82-31-645-1485

  • E-mail: yjkim@kicet.re.kr