کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1463585 | 989648 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ultra-thin cerium oxide nanostructures through a facile aqueous synthetic strategy Ultra-thin cerium oxide nanostructures through a facile aqueous synthetic strategy](/preview/png/1463585.png)
In this work, synthesis of ultra-thin 2D CeO2 nanoribbons is reported for the first time along with rod-shaped nanostructures via a surfactant free aqueous method. CeO2 nanoribbons of length >100 nm have been synthesised through a mild reaction route involving ammonia precipitation and subsequent heating and ageing at 0 °C. 2D nanostructures are proposed to be formed as a result of self-assembly of CeO2 molecules. The ribbons exhibited amorphous X-ray diffraction pattern and TEM showed a ribbon like morphology with crystal facets of ∼0.33 nm spacing corresponding to (1 1 1) plane of CeO2. HR-TEM confirmed that the nanorods are enclosed by {1 1 1} planes and have preferentially grown in {1 1 0} direction. The surface area of the powder containing majority nanorods is 82 m2/g and their average pore size is ∼3 nm. The nanostructures exhibited optical band gaps dominated by the regular quantum confinement effect as well as presence of defects.
Journal: Ceramics International - Volume 38, Issue 4, May 2012, Pages 3023–3028