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

Trevor Almeida

ISBN 10: 3846589632 / ISBN 13: 9783846589632

Published by LAP LAMBERT Academic Publishing, 2012

About this Item

nach der Bestellung gedruckt Neuware - Printed after ordering - 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 -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 -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.

Seller Inventory # 9783846589632

Bibliographic Details

• Title: Hydrothermal Synthesis and Characterisation of Hematite Nanorods : A Closer Look at the One-dimensional Growth of Hematite Nanostructures
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2012
• Language: English
• ISBN 10: 3846589632
• ISBN 13: 9783846589632
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 11D millimeters 220 millimeters width by 150 millimeters height by 11 millimeters depth
• Weight: 268 grams

About this title

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.

About the Author

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.