ScienceDirect.com - Materials Characterization - Hydrothermal synthesis of flowerlike SnO2 nanorod bundles and their application for lithium ion battery:
SnO2 nanorod bundles were synthesized by hydrothermal method. Field-emission scanning electron microscopy and transmission electron microscopy images showed that the as-prepared flowerlike SnO2 nanorod bundles consist of tetragonal nanorods with size readily tunable. Their electrochemical properties and application as anode for lithium-ion battery were evaluated by galvanostatic discharge–charge testing and cycle voltammetry. SnO2 nanorod flowers possess improved discharge capacity of 694 mA h g− 1 up to 40th cycle at 0.1 C.
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Monday, February 4, 2013
Elaboration and high resolution TEM characterization of SnO2 nanowires
ScienceDirect.com - Microelectronic Engineering - Elaboration and high resolution TEM characterization of SnO2 nanowires:
Tin dioxide is a wide-band gap (3.6 eV) semiconductor with numerous potential applications in batteries, gas sensors, and dye-sensitized solar cells. In this study nanocrystalline tin oxide nanowires have been synthesized by electrochemical deposition and oxidation in anodic aluminum oxide template. Electrochemical synthesis has been controlled by chronoamperometry and oxidation by X-ray diffraction. Polycrystalline nanowires with 140 nm in diameter and 3 μm in length have been obtained. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies have highlighted a uniform nanowire structure. High resolution transmission electron microscope (TEM FEI Tecnai G2-20 twin) was employed to characterize the crystalline structure of 5 nm diameter tin oxide grains. Tetragonal tin oxide phase has been characterized by X-ray powder diffraction and the interplanar distance of 0.32 nm corresponding to the SnO2 crystal obtained by HRTEM has confirmed the structure.
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Tin dioxide is a wide-band gap (3.6 eV) semiconductor with numerous potential applications in batteries, gas sensors, and dye-sensitized solar cells. In this study nanocrystalline tin oxide nanowires have been synthesized by electrochemical deposition and oxidation in anodic aluminum oxide template. Electrochemical synthesis has been controlled by chronoamperometry and oxidation by X-ray diffraction. Polycrystalline nanowires with 140 nm in diameter and 3 μm in length have been obtained. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies have highlighted a uniform nanowire structure. High resolution transmission electron microscope (TEM FEI Tecnai G2-20 twin) was employed to characterize the crystalline structure of 5 nm diameter tin oxide grains. Tetragonal tin oxide phase has been characterized by X-ray powder diffraction and the interplanar distance of 0.32 nm corresponding to the SnO2 crystal obtained by HRTEM has confirmed the structure.
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