Morphological phase diagram of biocatalytically active ceria nanostructures as a function of processing variables and their properties

Sakthivel, T., Das, S., Kumar, A., Reid, D.L., Gupta, A., Sayle, D.C., Seal, S. (2013) Morphological phase diagram of biocatalytically active ceria nanostructures as a function of processing variables and their properties. ChemPlusChem, 78 (12). pp. 1446-1455. ISSN 2192-6506. (doi:10.1002/cplu.201300302) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

We rationalize how fluorite-structured CeO2, which is crystallographically isotropic, can grow anisotropically (without templates) to form nanoparticles, rods, and cubes. In particular, single-crystalline and monodispersed cubic CeO2 nanoparticles, nanorods, and nanocubes have been selectively synthesized by a very simple, efficient, and economical hydrothermal process using different NaOH concentrations, and Ce(NO 3)3 as the cerium precursor. High-resolution transmission electron microscopy reveals nanomaterials with differently exposed crystal planes: {111} and {100} for nanoparticles, {110} and {100} for nanorods, and {100} for nanocubes. During the preparation of the CeO2 nanomaterials, the formation of intermediate anisotropic Ce(OH)3 species under basic conditions and their conversion into CeO2 at higher temperature are key factors responsible for the shape evolution. Atomistic computer simulations were used to help rationalize how the synthetic conditions impact upon the morphology of the nanomaterial. The synthesized CeO2 nanoparticles and nanorods demonstrate higher catalase mimetic activities than the nanocubes. Get in shape: Single-crystalline and monodispersed nanoparticles, nanorods, and nanocubes have been synthesized selectively by using a very simple, efficient, and economical hydrothermal process by changing the experimental parameters. The results have been used to construct a morphological phase diagram showing the phase boundaries of each type of structure (see figure). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type: Article
DOI/Identification number: 10.1002/cplu.201300302
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - ChemPlusChem [Field not mapped to EPrints] AD - Advanced Materials Processing and Analysis Center (AMPAC), NanoScience Technology Center (NSTC), University of Central Florida, 4000, Central Florida Boulevard, Orlando, FL 32816, United States [Field not mapped to EPrints] AD - School of Physical Science, University of Kent, Canterbury, Kent, CT2 7NZ, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: cerium oxide, hydrothermal synthesis, molecular dynamics, nanostructures, phase diagrams
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Dean Sayle
Date Deposited: 27 Jan 2015 15:26 UTC
Last Modified: 29 May 2019 14:06 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46769 (The current URI for this page, for reference purposes)
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