The production of carbon particles of different shapes produced by the chlorination of Cr(C5H5)2 |
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| Affiliation: | 1. Petroleum Engineering Program, Texas A&M University at Qatar, Doha 23874, Qatar;2. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA;3. Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA;4. Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA;5. School of Energy Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;6. Petroleum Engineering Program and Chemical Engineering Program, Texas A&M University at Qatar, Doha 23874, Qatar;7. TEES Gas & Fuels Research Center, Texas A&M University, College Station, TX 77843, USA;8. Center for Advanced Materials (CAM), Qatar University, Doha 2713, Qatar;1. Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China;2. Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, China;3. Chemistry Department, College of Arts and Sciences, University of South Florida, FL 33620-4202, USA |
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| Abstract: | Carbon particles have been obtained by the chlorination of chromocene (Cr(C5H5)2). Changes in their morphology and micro-nanostructure have been monitored at two different temperatures. At 400 °C, filled materials (tubes and spheres) and agglomerated round particles are formed, whereas at 900 °C closed-end tubes, hollow and solid spheres were produced. Transmission electron microscopy shows that these particles are formed of highly disordered graphene-like layers, which is confirmed by the absence of the 2D and 2G bands in the Raman spectrum. The calculated in-plane correlation length of these graphene-like layers is 1.2 ± 0.1 nm. In all the carbon particles, electron energy-loss spectroscopy shows a very similar sp2 carbon bonding content (89–98%) and mass density ranging from 1.6 to 1.8 g/cm3, both below standard graphite. Textural studies performed on the sample prepared at 900 °C show Type II adsorption isotherms with a surface area of 694 m2/g. |
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