SYNTHESIS OF NOVEL NANOCARBONS FROM CARBON PRECURSORS PRERARED BY DEFLUORINATION

由脱氟制备的碳前体合成新型纳米碳

• 批准号: 16550166
• 负责人: YAMADA Yoshio
• 金额: $ 2.24万
• 依托单位: University of Fukui
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16550166/
• 关键词: Nanofiber; Defluorination; Carbon precursors; Amorphous carbons; Porous carbons; Perfluorooreanic compounds; 炭素先駆体; 非晶質炭素; ナノカーボン

The purpose of this study is to synthesis novel nanocarbons such as nanofibers and nanospheres by use of defluroination of perfluoroorganic compounds with alkali metals. This procedure has an advantage in which the reaction can progress at low temperatures less than 200℃. The as-prepared products(carbon precursors) were heat-treated up to higher temperatures in order to obtain stable carbons from the precursors. As a result we succeeded in synthesis of nanoporous carbons with characteristic morphology and unique porosity by using various kinds of perfluorocompounds. These carbons are consisted basically of amorphous structure, but the treatment at higher temperatures than 2000℃ brought about not only the non-graphitic constituents, but also the graphitic components. In addition, when pentafluorooctane with an aliphatic C-C chain, hexafluorobenzene and octafluorotoluene containing an aromatic ring and also pentafluoropyridine having a nitrogen atom in a ring were defluorinated under vacuum with sodium or potassium, nanoporous carbons and nanofibers were obtained. It was found that they have different mesopores volume and pore size distributions. In order to control the pore size distribution and to obtain nano-composites made up of sp and sp^2 carbons, octafluorotoluene and pentafluorooctane were used as starting reagents. These compounds have nearly same boiling point. The mixture of both components with various ratios was defluorinated and treated as the same manner. As a result it was elucidated that the mixing of both perfluorocompounds is very effective for the control of the pore size distribution. Now we are continuing accumulation of the data on this experiment.

本研究的目的是利用碱金属对全氟有机化合物进行脱氟反应，合成新型的纳米碳，如纳米纤维和纳米球。该方法的优点是反应可以在低于200℃的低温下进行。将所制备的产物（碳前体）热处理至更高的温度，以从前体获得稳定的碳。因此，我们成功地利用各种全氟化合物合成了具有特征形貌和独特孔隙率的纳米多孔碳。这些碳基本上由无定形结构组成，但在高于2000℃的温度下处理不仅产生了非石墨组分，而且还产生了石墨组分。此外，当具有脂族C-C链的五氟辛烷、含有芳环的六氟苯和八氟甲苯以及环中具有氮原子的五氟吡啶在真空下用钠或钾脱氟时，获得纳米多孔碳和纳米纤维。结果发现，它们具有不同的介孔体积和孔径分布。为了控制孔径分布并获得由sp和sp^2碳组成的纳米复合材料，使用八氟甲苯和五氟辛烷作为起始试剂。这些化合物的沸点几乎相同。将具有不同比例的两种组分的混合物脱氟并以相同的方式处理。结果表明，两种全氟化合物的混合对于控制孔径分布非常有效。现在我们正在继续积累这个实验的数据。

项目成果

Structural change of carbon material obtained by defluorination of perfluoronaphthalene at very low temperature and their lithiuminsertion property

全氟萘极低温脱氟碳材料的结构变化及其嵌锂性能

• 发表时间: 2007
• 期刊: aterials Science and Engineering B (印刷中)
• 作者: Osamu Tanaike

Low temperature synthesis of carbon materials by defluorinntion of perfluoroorganic compounds

全氟有机化合物脱氟低温合成碳材料

• 发表时间: 2007
• 期刊: Edited by the 117th Committee of the Japan Society for the Promotion of Science, Special issue for 60th anniversary titled New Trend of Carbon Materials, Printed by Showa Information Process Co., Ltd.
• 作者: Osamu Tanaike;Osamu Tanaike;Yoshio Yamada
• 通讯作者: Yoshio Yamada

PTFEの脱フッ素化による多孔質炭素の調製と電気二重層キャパシタへの応用

PTFE脱氟制备多孔碳及其在双电层电容器中的应用

• 发表时间: 2004
• 期刊: 炭素 215
• 作者: Yasuhiko;Yamamoto;Yoshio Yamada;山田能生
• 通讯作者: 山田能生

Synthesis of amorphous nanoflber by defluorination of perfluoroorganic

全氟有机物脱氟合成无定形纳米纤维

• 期刊: International Conference on Carbon, CARBON2006, Presented in 2006, Aberdeen, UK
• 作者: Yasuhiko;Yamamoto;Yoshio Yamada;山田能生;Yoshio Yamada;Yoshio Yamada
• 通讯作者: Yoshio Yamada

フッ素化有機化合物の脱フッ素化による炭素材料の低温合成

含氟有机化合物脱氟低温合成碳材料

• 发表时间: 2007
• 作者: Yasuhiko;Yamamoto;Yoshio Yamada;山田能生;Yoshio Yamada;Yoshio Yamada;Osamu Tanaike;Osamu Tanaike;Osamu Tanaike;Osamu Tanaike;Yoshio Yamada;Yoshio Yamada;山田 能生
• 通讯作者: 山田 能生