Crystal structure control of nanosized MnO2 particles synthesized by a hydrothermal process using different Mn precursors

Young Ji Park (박영지); Yeon-Bin Choi (최연빈); Sang Hyo Jeong (정상효); Tae Wook Kang (강태욱); Byungseo Bae (배병서); Sun Woog Kim (김선욱)

doi:10.6111/JKCGCT.2025.35.3.087

Crystal structure control of nanosized MnO2 particles synthesized by a hydrothermal process using different Mn precursors

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2025, 35(3), pp.87~94
DOI : 10.6111/JKCGCT.2025.35.3.087
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : July 30, 2025
Accepted : August 20, 2025
Published : September 30, 2025

Young Ji Park ¹, Yeon-Bin Choi ², Sang Hyo Jeong ³, Tae Wook Kang ³, Byungseo Bae ², Sun Woog Kim ³

¹경상대학교
²영월산업진흥원
³한국세라믹기술원

Accredited

ABSTRACT

Single-phase α-,β-, and γ-MnO₂ nanoparticles with high crystallinity were successfully synthesized by a hydrothermal process using different Mn precursors, such as Mn(OAc)₂, MnSO₄, MnCl₂, and Mn(NO₃)₂. The crystal structure and morphology of the MnO₂ particles could be effectively controlled by changing the Mn source. The use of Mn(OAc)₂ and MnSO₄ as precursors resulted in rod-shaped α- and β-MnO₂ particles, whereas MnCl₂, and Mn(NO₃)₂ yielded aggregated angular nanoparticles of γ-MnO₂. X-ray photoelectron spectroscopic analysis revealed that β-MnO₂ had a high ratio of Mn4+ and Olatt on the particle surface, whereas α- and γ-MnO₂ sample had a lower valence state of Mn, such as Mn3+ and Mn2+, on the surface, and the ratio of Olatt was also relatively low.

KEYWORDS

α-, β-, and γ-MnO₂, Acidity, Hydrothermal process, Particle morphology

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Journal of the Korean Crystal Growth and Crystal Technology 2025 KCI Impact Factor : 0.14 KCI-WoS Impact Factor : 0.45

Crystal structure control of nanosized MnO2 particles synthesized by a hydrothermal process using different Mn precursors

ABSTRACT

KEYWORDS

Journal Copyright Policy

Citation status

* References for papers published after 2025 are currently being built.

Journal of the Korean Crystal Growth and Crystal Technology 2025 KCI Impact Factor : 0.14 KCI-WoS Impact Factor : 0.45

Crystal structure control of nanosized MnO2 particles synthesized by a hydrothermal process using different Mn precursors

ABSTRACT

KEYWORDS

Journal Copyright Policy

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