Synthesis of high active-site density nanofibrous MnO2-base materials withenhanced permeabilities

Citation
Td. Xiao et al., Synthesis of high active-site density nanofibrous MnO2-base materials withenhanced permeabilities, NANOSTR MAT, 10(6), 1998, pp. 1051-1061
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
NANOSTRUCTURED MATERIALS
ISSN journal
0965-9773 → ACNP
Volume
10
Issue
6
Year of publication
1998
Pages
1051 - 1061
Database
ISI
SICI code
0965-9773(199808)10:6<1051:SOHADN>2.0.ZU;2-X
Abstract
An aqueous solution reaction method is described for preparing nanofibrous MnO2-base materials. A critical step in the synthesis is an extended period of refluxing of the reactive constituents, which enables the gradual trans formation of an initial nanoparticle agglomerated mass into a random-weave nanofibrous structure. Partial transformation of the material realizes a no vel bimodal morphology, which combines a high density of chemically active sites with an enhanced fluid permeability rate. Nigh resolution TEM observa tions reveal that the nanoscale fibers are b-axis oriented single crystals, which contain lattice defects in the form of dislocation dipoles, molecula r pores, and nanoscale holes. (C) 1998 Acta Metallurgica Inc.