| Formation of Nanographite Using GaPO4-LTA as Template |
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| 作者姓名： | 奚春宇 李国栋 赵旭 田野 张瑜 陈接胜 |
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| 作者单位： | StateKeyLaboratoryofInorganicSynthesisandPreparativeChemistr3,CollegeofChemistry,JilinUniversity,Changchun,Jilin130023,China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (No. 20331010) and the Education Ministry of China. |
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| 摘 要： | An attempt was made to prepare nanographite with uniform size by pyrolysis of 4-methyl pyridine (MPy), which is the structure-directing agent for the formation of GaPO4-LTA single crystals, in the GaPO4-LTA framework at 760 ℃. The as-prepared nanographite has been examined by Raman spectroscopy, transmission electron microscopy (TEM), electron spin resonance (ESR) and magnetization characterizations. The TEM image shows that the size of individual nanographite particles is about 7 nm, and it is proved that there are spins of sp^2-type (π-type) radical electrons localized on the zigzag edge sites of the nanographite. The magnetic susceptibility of the nanographite shows crossover from a high-temperature diamagnetic to a low-temperature paramagnetic behavior, in good agreement with the theoretical expectation.
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| 关 键 词： | 纳米石墨 GaPO4-LTA 模型 高温分解 4-甲基嘧啶 拉曼散射光谱 |
Formation of Nanographite Using GaPO_4-LTA as Template |
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| XI,Chun-Yu LI,Guo-Dong ZHAO,XuTIAN,Ye ZHANG,Yu CHEN,Jie-ShengState Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun,Jilin ,China.Formation of Nanographite Using GaPO4-LTA as Template[J].Chinese Journal of Chemistry,2004,22(12):1399-1402. |
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| Authors: | XI Chun-Yu LI Guo-Dong ZHAO XuTIAN Ye ZHANG Yu CHEN Jie-ShengState Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun Jilin China |
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| Institution: | XI,Chun-Yu LI,Guo-Dong ZHAO,XuTIAN,Ye ZHANG,Yu CHEN,Jie-ShengState Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun,Jilin 130023,China |
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| Abstract: | An attempt was made to prepare nanographite with uniform size by pyrolysis of 4‐methyl pyridine (MPy), which is the structure‐directing agent for the formation of GaPO4‐LTA single crystals, in the GaPO4‐LTA framework at 760°C. The as‐prepared nanographite has been examined by Raman spectroscopy, transmission electron microscopy (TEM), electron spin resonance (ESR) and magnetization characterizations. The TEM image shows that the size of individual nanographite particles is about 7 nm, and it is proved that there are spins of sp2‐type (π‐type) radical electrons localized on the zigzag edge sites of the nanographite. The magnetic susceptibility of the nanographite shows crossover from a high‐temperature diamagnetic to a low‐temperature paramagnetic behavior, in good agreement with the theoretical expectation. |
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| Keywords: | nanographite GaPO4-LTA template magnetic susceptibility |
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