Controlling heterogenite particle morphology and microstructure by varying synthetic conditions

Jason C. Myers; R. Lee Penn

doi:10.1016/j.materresbull.2011.02.003

Controlling heterogenite particle morphology and microstructure by varying synthetic conditions

Jason C. Myers, R. Lee Penn

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

This work presents results demonstrating control over heterogenite (β-CoOOH) nanoparticle properties through modifications to the synthetic preparation method. The particles are prepared by first precipitating cobalt (II) hydroxide, followed by oxidation to form heterogenite. The temperature during the synthesis yields control over the size and phase of the precursor cobalt (II) hydroxide particles generated, and the choice of oxidizing agent (H₂O₂ or NaOCl) yields the greatest degree of control over the transformation from precursor to product. Oxidization by H ₂O₂ results in heterogenite crystallites that are substantially smaller than the precursor Co(OH)₂ particles, preserving very little of the Co(OH)₂ morphology and structure. Oxidization by NaOCl, in contrast, leaves intact features such as the shape and size of the Co(OH)₂ particles as well as preserves the intercalation of anions such as chloride.

Original language	English (US)
Pages (from-to)	649-657
Number of pages	9
Journal	Materials Research Bulletin
Volume	46
Issue number	5
DOIs	https://doi.org/10.1016/j.materresbull.2011.02.003
State	Published - May 2011

Bibliographical note

Funding Information:
Role of the funding source: Funding for this work was provided by the University of Minnesota and the National Science Foundation. These sources had no involvement in the study design, decision to publish, or the collection, analysis, and interpretation of the data.

Funding Information:
We thank the University of Minnesota and the National Science Foundation ( Career-036385 and MRI EAR-0320641 ) for funding to support this work. Portions of this work were conducted at the Characterization Facility, University of Minnesota, which receives support from the NSF through the National Nanotechnology Infrastructure Network.

Keywords

A. Oxides
B. Chemical synthesis
B. Crystal growth
C. Electron microscopy
D. Microstructure

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10.1016/j.materresbull.2011.02.003

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abstract = "This work presents results demonstrating control over heterogenite (β-CoOOH) nanoparticle properties through modifications to the synthetic preparation method. The particles are prepared by first precipitating cobalt (II) hydroxide, followed by oxidation to form heterogenite. The temperature during the synthesis yields control over the size and phase of the precursor cobalt (II) hydroxide particles generated, and the choice of oxidizing agent (H2O2 or NaOCl) yields the greatest degree of control over the transformation from precursor to product. Oxidization by H 2O2 results in heterogenite crystallites that are substantially smaller than the precursor Co(OH)2 particles, preserving very little of the Co(OH)2 morphology and structure. Oxidization by NaOCl, in contrast, leaves intact features such as the shape and size of the Co(OH)2 particles as well as preserves the intercalation of anions such as chloride.",

keywords = "A. Oxides, B. Chemical synthesis, B. Crystal growth, C. Electron microscopy, D. Microstructure",

author = "Myers, {Jason C.} and Penn, {R. Lee}",

note = "Funding Information: Role of the funding source: Funding for this work was provided by the University of Minnesota and the National Science Foundation. These sources had no involvement in the study design, decision to publish, or the collection, analysis, and interpretation of the data. Funding Information: We thank the University of Minnesota and the National Science Foundation ( Career-036385 and MRI EAR-0320641 ) for funding to support this work. Portions of this work were conducted at the Characterization Facility, University of Minnesota, which receives support from the NSF through the National Nanotechnology Infrastructure Network. ",

year = "2011",

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doi = "10.1016/j.materresbull.2011.02.003",

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PY - 2011/5

Y1 - 2011/5

N2 - This work presents results demonstrating control over heterogenite (β-CoOOH) nanoparticle properties through modifications to the synthetic preparation method. The particles are prepared by first precipitating cobalt (II) hydroxide, followed by oxidation to form heterogenite. The temperature during the synthesis yields control over the size and phase of the precursor cobalt (II) hydroxide particles generated, and the choice of oxidizing agent (H2O2 or NaOCl) yields the greatest degree of control over the transformation from precursor to product. Oxidization by H 2O2 results in heterogenite crystallites that are substantially smaller than the precursor Co(OH)2 particles, preserving very little of the Co(OH)2 morphology and structure. Oxidization by NaOCl, in contrast, leaves intact features such as the shape and size of the Co(OH)2 particles as well as preserves the intercalation of anions such as chloride.

AB - This work presents results demonstrating control over heterogenite (β-CoOOH) nanoparticle properties through modifications to the synthetic preparation method. The particles are prepared by first precipitating cobalt (II) hydroxide, followed by oxidation to form heterogenite. The temperature during the synthesis yields control over the size and phase of the precursor cobalt (II) hydroxide particles generated, and the choice of oxidizing agent (H2O2 or NaOCl) yields the greatest degree of control over the transformation from precursor to product. Oxidization by H 2O2 results in heterogenite crystallites that are substantially smaller than the precursor Co(OH)2 particles, preserving very little of the Co(OH)2 morphology and structure. Oxidization by NaOCl, in contrast, leaves intact features such as the shape and size of the Co(OH)2 particles as well as preserves the intercalation of anions such as chloride.

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KW - B. Chemical synthesis

KW - B. Crystal growth

KW - C. Electron microscopy

KW - D. Microstructure

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Controlling heterogenite particle morphology and microstructure by varying synthetic conditions

Abstract

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