Synthesis of nanocrystalline manganese oxide powders: Influence of hydrogen peroxide on particle characteristics

Joo Ho Moon, Masanobu Awano, Hiroyoshi Takagi, Yoshinobu Fujishiro

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Nocrystalline manganese oxide powders have been prepared at 25 °C by precipitation from Mn(NO3)2 aqueous solution. The presence and addition sequence of H2O2 significantly influence particle characteristics of the resulting manganese oxides, including crystal structure, particle size and morphology, and surface area, depending upon molar ratio of H2O2 with respect to Mn. The precipitation from preoxidized manganese solution by H2O2 results in flakelike-shaped amorphous hydrous manganese oxide (MnO2·xH2O). In the absence of H2O2, on the other hand, amorphous Mn(OH)2 is obtained, and a part of Mn(OH)2 subsequently transforms into crystalline Mn3O4 by oxidation in air. Relative population of amorphous Mn(OH)2 decreases by dissolution when post-treated with H2O2. At Mn:H2O2 = 1:4, the well-defined 16-nm-sized nanocrystalline Mn3O4 with homogenous particle morphology is prepared. The treatment with excess H2O2, however, destroys crystalline Mn3O4 and leads to further oxidation of the aqueous manganese species. Under these conditions, a mixture of needlelike Mn2O3 and cubelike Mn3O4, including amorphous MnO2·xH2O, is obtained.

Original languageEnglish
Pages (from-to)4594-4601
Number of pages8
JournalJournal of Materials Research
Volume14
Issue number12
DOIs
Publication statusPublished - 1999 Jan 1

Fingerprint

Manganese oxide
manganese oxides
hydrogen peroxide
Hydrogen peroxide
Powders
Hydrogen Peroxide
manganese
synthesis
Manganese
oxidation
Crystalline materials
Oxidation
dissolving
aqueous solutions
Dissolution
crystal structure
Crystal structure
air
Particle size
manganese oxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Moon, Joo Ho ; Awano, Masanobu ; Takagi, Hiroyoshi ; Fujishiro, Yoshinobu. / Synthesis of nanocrystalline manganese oxide powders : Influence of hydrogen peroxide on particle characteristics. In: Journal of Materials Research. 1999 ; Vol. 14, No. 12. pp. 4594-4601.
@article{0976c8cef11146c695fddd00f598a6dd,
title = "Synthesis of nanocrystalline manganese oxide powders: Influence of hydrogen peroxide on particle characteristics",
abstract = "Nocrystalline manganese oxide powders have been prepared at 25 °C by precipitation from Mn(NO3)2 aqueous solution. The presence and addition sequence of H2O2 significantly influence particle characteristics of the resulting manganese oxides, including crystal structure, particle size and morphology, and surface area, depending upon molar ratio of H2O2 with respect to Mn. The precipitation from preoxidized manganese solution by H2O2 results in flakelike-shaped amorphous hydrous manganese oxide (MnO2·xH2O). In the absence of H2O2, on the other hand, amorphous Mn(OH)2 is obtained, and a part of Mn(OH)2 subsequently transforms into crystalline Mn3O4 by oxidation in air. Relative population of amorphous Mn(OH)2 decreases by dissolution when post-treated with H2O2. At Mn:H2O2 = 1:4, the well-defined 16-nm-sized nanocrystalline Mn3O4 with homogenous particle morphology is prepared. The treatment with excess H2O2, however, destroys crystalline Mn3O4 and leads to further oxidation of the aqueous manganese species. Under these conditions, a mixture of needlelike Mn2O3 and cubelike Mn3O4, including amorphous MnO2·xH2O, is obtained.",
author = "Moon, {Joo Ho} and Masanobu Awano and Hiroyoshi Takagi and Yoshinobu Fujishiro",
year = "1999",
month = "1",
day = "1",
doi = "10.1557/JMR.1999.0622",
language = "English",
volume = "14",
pages = "4594--4601",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Materials Research Society",
number = "12",

}

Synthesis of nanocrystalline manganese oxide powders : Influence of hydrogen peroxide on particle characteristics. / Moon, Joo Ho; Awano, Masanobu; Takagi, Hiroyoshi; Fujishiro, Yoshinobu.

In: Journal of Materials Research, Vol. 14, No. 12, 01.01.1999, p. 4594-4601.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synthesis of nanocrystalline manganese oxide powders

T2 - Influence of hydrogen peroxide on particle characteristics

AU - Moon, Joo Ho

AU - Awano, Masanobu

AU - Takagi, Hiroyoshi

AU - Fujishiro, Yoshinobu

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Nocrystalline manganese oxide powders have been prepared at 25 °C by precipitation from Mn(NO3)2 aqueous solution. The presence and addition sequence of H2O2 significantly influence particle characteristics of the resulting manganese oxides, including crystal structure, particle size and morphology, and surface area, depending upon molar ratio of H2O2 with respect to Mn. The precipitation from preoxidized manganese solution by H2O2 results in flakelike-shaped amorphous hydrous manganese oxide (MnO2·xH2O). In the absence of H2O2, on the other hand, amorphous Mn(OH)2 is obtained, and a part of Mn(OH)2 subsequently transforms into crystalline Mn3O4 by oxidation in air. Relative population of amorphous Mn(OH)2 decreases by dissolution when post-treated with H2O2. At Mn:H2O2 = 1:4, the well-defined 16-nm-sized nanocrystalline Mn3O4 with homogenous particle morphology is prepared. The treatment with excess H2O2, however, destroys crystalline Mn3O4 and leads to further oxidation of the aqueous manganese species. Under these conditions, a mixture of needlelike Mn2O3 and cubelike Mn3O4, including amorphous MnO2·xH2O, is obtained.

AB - Nocrystalline manganese oxide powders have been prepared at 25 °C by precipitation from Mn(NO3)2 aqueous solution. The presence and addition sequence of H2O2 significantly influence particle characteristics of the resulting manganese oxides, including crystal structure, particle size and morphology, and surface area, depending upon molar ratio of H2O2 with respect to Mn. The precipitation from preoxidized manganese solution by H2O2 results in flakelike-shaped amorphous hydrous manganese oxide (MnO2·xH2O). In the absence of H2O2, on the other hand, amorphous Mn(OH)2 is obtained, and a part of Mn(OH)2 subsequently transforms into crystalline Mn3O4 by oxidation in air. Relative population of amorphous Mn(OH)2 decreases by dissolution when post-treated with H2O2. At Mn:H2O2 = 1:4, the well-defined 16-nm-sized nanocrystalline Mn3O4 with homogenous particle morphology is prepared. The treatment with excess H2O2, however, destroys crystalline Mn3O4 and leads to further oxidation of the aqueous manganese species. Under these conditions, a mixture of needlelike Mn2O3 and cubelike Mn3O4, including amorphous MnO2·xH2O, is obtained.

UR - http://www.scopus.com/inward/record.url?scp=0033350781&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033350781&partnerID=8YFLogxK

U2 - 10.1557/JMR.1999.0622

DO - 10.1557/JMR.1999.0622

M3 - Article

AN - SCOPUS:0033350781

VL - 14

SP - 4594

EP - 4601

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 12

ER -