jp403527p_si_001.pdf (8.76 MB)
Morphological Evolution of Two-Dimensional MnO2 Nanosheets and Their Shape Transformation to One-Dimensional Ultralong MnO2 Nanowires for Robust Catalytic Activity
journal contribution
posted on 2013-11-14, 00:00 authored by Arun Kumar Sinha, Mukul Pradhan, Tarasankar PalThis
paper reports the nucleation and growth of 2D δ-MnO2 nanosheets from a simple wet chemical reaction at low temperature.
The reaction between aqueous KMnO4 and pure ethyl acetate
constitutes a new a biphasic platform for product evolution. Then
the synthesized δ-MnO2 nanosheets undergo shape transformation
to 1D α-MnO2 nanowires in the same pot via a dissolution–recrystallization
mechanism. The detailed growth mechanism of nanosheet formation and
the morphology transformation are described in this paper. Moreover,
this low temperature technique can be used to produce ultralong α-MnO2 nanowires in industrial amounts which are difficult to synthesize
by conventional high temperature methods. In this method, we have
prepared 25.00 g of α-MnO2 nanowires in our nanomaterial
laboratory from 18 batches. Lastly, solvent-free catalytic activity
of α-MnO2 nanowires is investigated for the hydrolysis
of benzonitrile to benzamide in one step.
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18 batchesShape Transformation25.00 gnanowiremorphology transformationMorphological Evolutiongrowth mechanismbiphasic platformethyl acetatenanosheet formationchemical reactiontemperature methodsshape transformationKMnO 4Robust Catalytic ActivityThis paper reportsproduct evolutiontemperature techniquenanomaterial laboratory
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