학술논문
Additive-Free Synthesis of Cerium Oxide Nanorods with Reaction Temperature-Tunable Aspect Ratios.
Document Type
Article
Author
Source
Subject
*ADDITIVES
*CERIUM oxides
*NANOROD synthesis
*CHEMICAL reactions
*EFFECT of temperature on metals
*CRYSTAL morphology
*ASPECT ratio (Aerofoils)
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Language
ISSN
0002-7820
Abstract
The ability to control the morphology of fluorite-structured cerium oxide nanomaterials is an important step in the design of cerium oxide-based catalysts. Herein, we report an additive-free synthesis of cerium oxide nanorods with highly tunable aspect ratios from ~6:1 to 40:1. The use of a microwave hydrothermal method allows for both rapid synthesis and temperature control. The ability to control the length of the nanorods from <51 nm to >1.7 μm by varying only the reaction temperature was demonstrated over a temperature range of 80°C to 200°C. The formation of the resulting nanorods was investigated using selected-area electron-diffraction and high-resolution transmission electron microscopy. The surface area of nanorod products was found to decrease from 117 to 22 m2/g as the reaction temperature increased from 80°C to 200°C, complementing the general trend of the increasing aspect ratios of these products. [ABSTRACT FROM AUTHOR]