HAN Zhi-dong, DU Peng, DONG Li-min, ZHANG Xian-you. Preparation of nitrate-H2SO4-graphite intercalation compounds by a two-step intercalation method. New Carbon Mater., 2009, 24(04): 379-382.
Citation:
HAN Zhi-dong, DU Peng, DONG Li-min, ZHANG Xian-you. Preparation of nitrate-H2SO4-graphite intercalation compounds by a two-step intercalation method. New Carbon Mater., 2009, 24(04): 379-382.
HAN Zhi-dong, DU Peng, DONG Li-min, ZHANG Xian-you. Preparation of nitrate-H2SO4-graphite intercalation compounds by a two-step intercalation method. New Carbon Mater., 2009, 24(04): 379-382.
Citation:
HAN Zhi-dong, DU Peng, DONG Li-min, ZHANG Xian-you. Preparation of nitrate-H2SO4-graphite intercalation compounds by a two-step intercalation method. New Carbon Mater., 2009, 24(04): 379-382.
Department of Materials Science and Engineering, Harbin University of Science and Technology|Harbin 150040, China
Funds:
National Natural Science Foundation of China for the Youth NSFY (50802022), Natural Science Foundation of Heilongjiang Province of China (E200613)
Ternary graphite intercalation compounds (GICs), nitrate/nitric acid-sulfuric acid-GICs, were prepared by a two-step method. Their structure was characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. Results showed that the two-step method favored the formation of lower stage-GICs by promoting the intercalation of nitrate or nitric acid and enlarging the interlayer spacing. The expanded GICs, whose expansion volume can reach 450mL/g, showed obvious graphite layers and a uniform porous structure. The two-step method had many advantages compared with the direct intercalation method, such as safety in operation, less pollution during experiments and ease of industrial scale-up.
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