Organized and highly dispersed growth of MnO2 nano-rods by sonochemical hydrolysis of Mn(3)acetate

V. Ganesh Kumar; Kwang Bum Kim

doi:10.1016/j.ultsonch.2005.09.010

Organized and highly dispersed growth of MnO₂ nano-rods by sonochemical hydrolysis of Mn(3)acetate

V. Ganesh Kumar, Kwang Bum Kim

Department of Materials Science and Engineering

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

57 Citations (Scopus)

Abstract

Highly dispersed and non-agglomerated α-MnO₂ nano-needles of dimensions 20-30 nm have been synthesized by the application of ultrasound radiation on the aqueous solution consisting of manganese(3)acetate close to neutral pH followed by mild drying. With a similar reaction system, hot hydrolysis (non-sonochemical process) produced β-MnO₂ nano-rods of length 100-200 nm but with high degree agglomeration. Sonochemical cavitation phenomenon is suggested to have a pronounced effect for the formation of special phase and morphology. The effect is proved by the difference in the intermediate products which has difference in crystalinity and phase-purity. The intermediate phases are identified to be single-phase γ-MnOOH for the non-sonochemical reaction and mixture of γ-MnOOH, α-MnO₂ and β-MnO₂ for the sonochemical products.

Original language	English
Pages (from-to)	549-556
Number of pages	8
Journal	Ultrasonics Sonochemistry
Volume	13
Issue number	6
DOIs	https://doi.org/10.1016/j.ultsonch.2005.09.010
Publication status	Published - 2006 Sept

Bibliographical note

Funding Information:
This work was supported by the ERC program of MOST/KOSEF (Grant No. R11-2002-102-00000-0) and the Ministry of Commerce, Industry, and Energy of Republic of Korea (M10428060003-04L2806-00310). Dr. V. Ganesh Kumar would like to thank KOFST, Seoul, KOREA for offering a Brain Pool Visiting Fellowship.

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology Nuclear Medicine and imaging
Acoustics and Ultrasonics
Organic Chemistry
Inorganic Chemistry

Access to Document

10.1016/j.ultsonch.2005.09.010

Cite this

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title = "Organized and highly dispersed growth of MnO2 nano-rods by sonochemical hydrolysis of Mn(3)acetate",

abstract = "Highly dispersed and non-agglomerated α-MnO2 nano-needles of dimensions 20-30 nm have been synthesized by the application of ultrasound radiation on the aqueous solution consisting of manganese(3)acetate close to neutral pH followed by mild drying. With a similar reaction system, hot hydrolysis (non-sonochemical process) produced β-MnO2 nano-rods of length 100-200 nm but with high degree agglomeration. Sonochemical cavitation phenomenon is suggested to have a pronounced effect for the formation of special phase and morphology. The effect is proved by the difference in the intermediate products which has difference in crystalinity and phase-purity. The intermediate phases are identified to be single-phase γ-MnOOH for the non-sonochemical reaction and mixture of γ-MnOOH, α-MnO2 and β-MnO2 for the sonochemical products.",

author = "Kumar, {V. Ganesh} and Kim, {Kwang Bum}",

note = "Funding Information: This work was supported by the ERC program of MOST/KOSEF (Grant No. R11-2002-102-00000-0) and the Ministry of Commerce, Industry, and Energy of Republic of Korea (M10428060003-04L2806-00310). Dr. V. Ganesh Kumar would like to thank KOFST, Seoul, KOREA for offering a Brain Pool Visiting Fellowship. ",

year = "2006",

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AU - Kumar, V. Ganesh

AU - Kim, Kwang Bum

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N2 - Highly dispersed and non-agglomerated α-MnO2 nano-needles of dimensions 20-30 nm have been synthesized by the application of ultrasound radiation on the aqueous solution consisting of manganese(3)acetate close to neutral pH followed by mild drying. With a similar reaction system, hot hydrolysis (non-sonochemical process) produced β-MnO2 nano-rods of length 100-200 nm but with high degree agglomeration. Sonochemical cavitation phenomenon is suggested to have a pronounced effect for the formation of special phase and morphology. The effect is proved by the difference in the intermediate products which has difference in crystalinity and phase-purity. The intermediate phases are identified to be single-phase γ-MnOOH for the non-sonochemical reaction and mixture of γ-MnOOH, α-MnO2 and β-MnO2 for the sonochemical products.

AB - Highly dispersed and non-agglomerated α-MnO2 nano-needles of dimensions 20-30 nm have been synthesized by the application of ultrasound radiation on the aqueous solution consisting of manganese(3)acetate close to neutral pH followed by mild drying. With a similar reaction system, hot hydrolysis (non-sonochemical process) produced β-MnO2 nano-rods of length 100-200 nm but with high degree agglomeration. Sonochemical cavitation phenomenon is suggested to have a pronounced effect for the formation of special phase and morphology. The effect is proved by the difference in the intermediate products which has difference in crystalinity and phase-purity. The intermediate phases are identified to be single-phase γ-MnOOH for the non-sonochemical reaction and mixture of γ-MnOOH, α-MnO2 and β-MnO2 for the sonochemical products.

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