【摘 要】
：
The β-SiC/SiO2 core-shell nanowires with the "stem-and-node" structure were synthesized in the presence of cerium oxide by the carbothermal reduction of the st
【机 构】
：
College of Chemistry and Materials Science
论文部分内容阅读
The β-SiC/SiO2 core-shell nanowires with the "stem-and-node" structure were synthesized in the presence of cerium oxide by the carbothermal reduction of the starch-SiO2 hybrids gel.The samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),high-resolution transmission electron microscopy (HRTEM) and energy-dispersed X-ray (EDX).The results showed that the nanowires consisted of a 20-35 nm diameter crystalline β-SiC core wrapped with a 2-5 nm amorphous SiO2 shell,with their lengths up to several micrometers.The axes of nanowires lay along the[ 111 ]direction with a clean surface possessing a high density of planar defects.Base on the experimental results,it was suggested that the novel β-SiC/SiO2 core-shell coaxial nanowires with the "stem-and-node" structure were formed via the Vapor-liquid-solid (VLS) growth mechanism.
其他文献
It is economically advantageous to cast wrought aluminum alloys directly into near-net-shape components. The objective of the present work is to take advantage
The influence of the manganese-alloying on the structure and magnetocaloric properties of the Gd5Si2.05Ge1.95 compound was studied by X-ray powder diffraction a
Ce-doped ZnO films were prepared by the sol-gel method with spin coating onto glass substrates.Zinc acetate dihydrate,ethanol,diethanolamine and cerium nitrate
The cross-sectional distortion usually appears during rotary-draw bending process of thin-walled rectangular tube with small bending radius. To study the cross-
Ce-Cu-O monolithic catalysts were prepared by using Ce0.9Cu0.101.9 solid solution or nitrate as precursors,and their catalytic performance for the combustion of
Using solid-state synthesis method,a series of samples of lanthanum doped Li1-xLaxFePO4(x=0.0025,0.005,0.0075,0.01)were prepared.Each cathode structural and ele
In order to obtain the thermodynamic description of the Mg-Ga binary system, the thermodynamic assessment of the system was carried out using the CALPHAD method
The microstructure and properties of the 93W-4Ni-2Co-1Fe (mass fraction, %) tungsten heavy alloys prepared by mechanical alloying and electric current activated
With the development of aero-engine,gas import temperatures of hot section structural materials are increasingly higher.Metal alloy materials due to the rapidly
We investigated the transport properties of isoelectronic substitution of Yb by Ca for Zintl phase YbCd2Sb2 below 300 K.The p-type Yb1-xCaxCd2Sb2(0.2≤x≤0.8)sa