Hydrothermal synthesis of transition metal oxide nanomaterials in HEPES buffer solution

Various transition metal oxide (Co 3O 4, Mn 3O 4 and ZnO) nanostructures were readily synthesized in HEPES buffer solution (200 mmol/L, pH 7.40) via a simple hydrothermal method. The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission elect...

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Bibliographic Details
Published in:Materials letters 2010-09, Vol.64 (18), p.1939-1942
Main Authors: Li, Hui, Lu, Zhong, Wu, Jiliang, Yu, Hui, Yu, Xianglin, Chen, Rong
Format: Article
Language:English
Subjects:
Agglomeration
Buffer solutions
HEPES buffer
Hydrothermal
Hydroxyl groups
Microstructure
Nanocomposites
Nanomaterials
Nanostructure
Nitrogen atoms
Scanning electron microscopy
Transition metal oxide
Transition metal oxides
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Summary:Various transition metal oxide (Co 3O 4, Mn 3O 4 and ZnO) nanostructures were readily synthesized in HEPES buffer solution (200 mmol/L, pH 7.40) via a simple hydrothermal method. The products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and energy dispersive X-ray spectroscopy (EDX). It was found that the morphologies of the as-obtained transition metal oxide nanostructures were affected by the reaction temperature, HEPES/metal salt molar ratio and metal precursor. HEPES with two free nitrogen atoms (piperazine group) and terminal hydroxyl groups plays a critical role as a reactant and surfactant to prevent the transition metal oxide nanomaterials from aggregation.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2010.06.013