Characterization of CsC24 prepared from carbon materials with different graphitization degree |
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| Affiliation: | 1. Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-machi, Hachioji-shi, Tokyo 193-0997, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan;3. Department of Applied Chemistry, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan;1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan;2. Institute of Materials Science and Engineering, National Central University, Chungli 32001, Taiwan;1. Department of Environment & Energy Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea;2. College of General Education, Chosun University, 309 Pilmoon-daero, Dong-gu, Gwangju, 61452, Republic of Korea;3. Advanced Materials Division, Center for Membranes, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon, 34114, Republic of Korea;4. Department of Chemical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul, 06978, Republic of Korea;1. Department of Materials Chemistry and Engineering, College of Engineering, Konkuk University, Neung dong-ro 120, Gwang Jin Gu, Seoul, 143-701, Republic of Korea;2. Department of Chemical Engineering, College of Engineering, Hanyang University, Wang sip ri-ro 222, Seong Dong Gu, Seoul, 133-791, Republic of Korea;1. Facultad de Ingeniería, Universidad Nacional de La Plata, 1 esq 47, 1900, La Plata, Argentina;2. CINDECA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CONICET, 47 no 257, 1900, La Plata, Argentina |
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| Abstract: | Samples of CsC24 were prepared from carbon materials (derived from petroleum cokes) with different graphitization degree and were characterized by X-ray diffraction (XRD), electron spin resonance (ESR) and Raman spectroscopy. The XRD measurement showed that all the host carbon samples heat treated from 1300 to 2800°C being contacted with CsC8 planar specimen allowed the intercalation of Cs. Correspondingly, the resulting CsC24 samples were able to sorb hydrogen molecules, which is a clear evidence of the formation of the nanospace. The broad ESR signal due to conduction electron observed for carbon samples (heat-treatment temperature, HTT above 2200°C) disappeared after intercalation of Cs because of the spin–orbit interaction caused by the intercalated Cs. The Raman G-band of the CsC24 samples (HTT above 1750°C) shifted from 1584 cm−1 of the host carbon to higher wave number (∼1602 cm−1) in agreement with the reported data for CsC24. In addition, it was confirmed that the D-band signal disappeared for the CsC24 samples (HTT above 2000°C). |
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