Articles liés à Hydrothermal Synthesis and Characterisation of Hematite...

Hydrothermal Synthesis and Characterisation of Hematite Nanorods: A Closer Look at the One-dimensional Growth of Hematite Nanostructures - Couverture souple

Almeida, Trevor

 
9783846589632: Hydrothermal Synthesis and Characterisation of Hematite Nanorods: A Closer Look at the One-dimensional Growth of Hematite Nanostructures
Couverture souple
ISBN 10 : 3846589632 ISBN 13 : 9783846589632
Editeur : LAP LAMBERT Academic Publishing, 2012

Synopsis

Weakly-ferromagnetic hematite is a cheap, environmentally friendly and thermodynamically stable iron oxide, and 1D hematite nanorods (NRs) have been studied for a wide range of applications because their magnetic properties are greatly dependent on NR size and shape. Herein, the hydrothermal synthesis (HS) of hematite NRs is investigated using a combination of analytical techniques. Development of a novel, valve-assisted, hydrothermal pressure vessel, which allows for the rapid quenching of hydrothermal products as a function of reaction time and known reaction temperature, provided fundamental insight into the anisotropic crystal growth mechanism of the acicular hematite NRs. The hematite NR growth mechanism was found to be a two stage process: 1) the growth and dissolution of intermediate β-FeOOH NRs, alongside precipitation of primary hematite nanoparticles (NPs); and 2) the agglomeration and coarsening of primary hematite NPs into hematite NRs. The investigation of rapidly quenched β-FeOOH and hematite HS reaction products, heat treated in situ within a transmission electron microscope, provides direct evidence for the hydrothermal growth mechanism of lenticular hematite NRs.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

Weakly-ferromagnetic hematite is a cheap, environmentally friendly and thermodynamically stable iron oxide, and 1D hematite nanorods (NRs) have been studied for a wide range of applications because their magnetic properties are greatly dependent on NR size and shape. Herein, the hydrothermal synthesis (HS) of hematite NRs is investigated using a combination of analytical techniques. Development of a novel, valve-assisted, hydrothermal pressure vessel, which allows for the rapid quenching of hydrothermal products as a function of reaction time and known reaction temperature, provided fundamental insight into the anisotropic crystal growth mechanism of the acicular hematite NRs. The hematite NR growth mechanism was found to be a two stage process: 1) the growth and dissolution of intermediate β-FeOOH NRs, alongside precipitation of primary hematite nanoparticles (NPs); and 2) the agglomeration and coarsening of primary hematite NPs into hematite NRs. The investigation of rapidly quenched β-FeOOH and hematite HS reaction products, heat treated in situ within a transmission electron microscope, provides direct evidence for the hydrothermal growth mechanism of lenticular hematite NRs.

Biographie de l'auteur

Dr Trevor Almeida obtained his PhD in Materials Engineering and Materials Design from the University of Nottingham in 2010. Since then his primary research interests have been directed towards the processing, structure and advanced characterisation of nanomaterials, with a special interest in transmission electron microscopy.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2012
Langue
anglais
ISBN 10 
3846589632
ISBN 13 
9783846589632
Reliure
Broché
Nombre de pages
168
Coordonnées du fabricant
non disponible
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