Conducting carbonized polyaniline nanotubes
Conducting carbonized polyaniline nanotubes
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DOI：
10.1088/0957-4484/20/24/245601
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发表时间：
2009-06
期刊：
影响因子：
3.5
通讯作者：
S. Mentus;G. Ćirić-Marjanović;M. Trchová;J. Stejskal
中科院分区：
文献类型：
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作者：
S. Mentus;G. Ćirić-Marjanović;M. Trchová;J. Stejskal
以自组装聚苯胺纳米管为原料，经硫酸质子化碳化制备了导电含氮碳纳米管。碳化在氮气气氛中进行，升温速率为10°C min - 1，最高温度为800°C。通过扫描电镜和透射电镜观察到典型的炭化聚苯胺纳米管，其外径为100 ~ 260 nm，内径为20 ~ 170 nm，长0.5 ~ 0.8µm，外径为8 ~ 14 nm，内径为3.0 ~ 4.5 nm，长0.3 ~ 1.0µm。元素分析表明，炭化产物中氮含量为9wt %。纳米管聚苯胺前驱体的电导率为0.04 S cm−1，碳化后电导率提高到0.7 S cm−1。利用FTIR和拉曼光谱分析了碳化聚苯胺纳米管的分子结构，并利用EPR光谱比较了碳化聚苯胺纳米管的顺磁特性。
Conducting nitrogen-containing carbon nanotubes were synthesized by the carbonization of self-assembled polyaniline nanotubes protonated with sulfuric acid. Carbonization was carried out in a nitrogen atmosphere at a heating rate of 10 °C min−1 up to a maximum temperature of 800 °C. The carbonized polyaniline nanotubes which have a typical outer diameter of 100–260 nm, with an inner diameter of 20–170 nm and a length extending from 0.5 to 0.8 µm, accompanied with very thin nanotubes with outer diameters of 8–14 nm, inner diameters 3.0–4.5 nm and length extending from 0.3 to 1.0 µm, were observed by scanning and transmission electron microscopies. Elemental analysis showed 9 wt% of nitrogen in the carbonized product. Conductivity of the nanotubular PANI precursor, amounting to 0.04 S cm−1, increased to 0.7 S cm−1 upon carbonization. Molecular structure of carbonized polyaniline nanotubes has been analyzed by FTIR and Raman spectroscopies, and their paramagnetic characteristics were compared with the starting PANI nanotubes by EPR spectroscopy.