STUDY OF IRON OXIDE NANOPARTICLE”S SIZE EFFECT ON CNT”S DIMENTIONS SYNTHESIZED BY CCVD METHOD USING MgO AS SUPPORT FOR THE CATALYST

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تعداد صفحات :۵

چکیده مقاله:

In this work the effects of MgO-supported iron oxide nanoparticles size on CNT dimensions, synthesized by CCVD method has been investigated. The supported iron oxide nanoparticles are produced by impregnation method. Fe (NO3)3.9H2O salt and MgO powder were used as precursor materials for Fe and MgO, respectively. In order to provide different size nanoparticles, the loading ratio of Fe to MgO was varied through 15%, 25%, 35%, and 45%. Carbon nanotubes were produced by employing CCVD method, using acetylene and Argon gases as carbon source and carrier / cleaner gas, respectively. Nanoparticles and nanotubes size were characterized by analysis X-ray diffraction (XRD) pattern and scanning electron microscope (SEM) images. It is found that the CNTs diameter is well affected by catalyst particles size