期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 175, 期 -, 页码 161-169出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2013.03.035
关键词
Mesoporous material; Co-MCM-41; CVD; Acetylene; Graphene ball
类别
资金
- National Research foundation of Korea
- Korean Government (MEST), South Korea [NRF-C1ABA001-2011-0029965]
- Kyungpook National University Research Fund, Daegu, South Korea
- Department of Science and Technology under Nanoscience and Technology Initiative, New Delhi, India [SR/S5/NM-35/2005]
- Council of Scientific and Industrial Research (CSIR), New Delhi, India
The virtuous structure of mesoporous Co-MCM-41 molecular sieve was synthesized hydrothermally, and was characterized by various physico-chemical techniques such as ICP-AES, XRD, N-2 physisorption isotherms, FT-IR, TGA, SEM, and TEM. They were used as catalytic templates for the growth of graphene balls (GBs) by CVD method at different temperatures (850, 900, and 950 degrees C) using acetylene as a carbon precursor. The reaction temperature was optimized for the better formation of GBs. The synthesized novel carbon material was purified, and then systematically studied by XRD, TGA, SEM, HR-TEM and Raman spectroscopy techniques. The graphitic nature of material was confirmed by XRD analysis and Raman spectroscopy techniques. Thermal stability of GBs was above 600 degrees C under static condition and confirmed by TGA/DTG studies. The analytical results show that synthesized carbon materials had spherical structures with high degree of graphitization. The SEM and TEM image shows that the carbon materials exists in spherical morphology, and the diameter of these GBs are quite uniform and in a narrow range of 45-55 nm. (C) 2013 Elsevier Inc. All rights reserved.
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