多元酸催化炭气凝胶的常压制备及表征
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TQ424.1 9

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安徽省教育厅重点科研基金(KJ2010A278);安徽省重大科技项目(09010201005)


Preparation and characterization of multiple acid-catalyzed carbon aerogels under ambient conditions
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    摘要:

    在多元有机酸催化下,以间苯二酚和甲醛为反应物,十六烷基三甲基溴化铵为表面活性剂。通过溶胶-凝胶法制备出有机凝胶,再经过常压干燥、高温炭化得到炭气凝胶。用亚甲基蓝吸附测试、扫描电镜分析(SEM)和X射线衍射分析(XRD)表征所制备的样品。结果表明多元有机酸催化下制备的炭气凝胶呈现均匀的球状结构,且微球内富含连通的电子转移的孔道。其X射线衍射曲线由两个宽峰组成,说明材料属于非晶态物质。亚甲基蓝测试比表面达到740m2 /g,说明材料中存在大量的中孔。通过循环伏安扫描对材料的电化学性能进行测试。测试表明所制备的多孔炭气凝胶导电性良好具有高比电容,性能稳定具有较长使用寿命,成为有效的超级电容器电极材料。

    Abstract:

    A sol-gel polymerization has been employed to prepare organic aerogels through the reaction of resorcinol and formaldehyde with multiple organic acid as catalyst and cetyltrimethylammonium bromide as surfactant. The gels were dried under ambient pressure and carbonized at high temperature. The samples were characterized by methylene blue adsorption test, scanning electron microscopy (SEM), and X-ray diffraction analysis (XRD). The results indicated that the carbon aerogels are uniform spheres, and the microspheres were abundant in connected pore for the electronic transfering. The X-ray diffraction pattern showed two broad peaks, indicating that the materials are amorphous . The methylene blue adsorption test shows that there are a lot of mesoporous in the materiales and the surface area is as high as 740 m?g. Cyclic voltammetry (CV) was used to study the electrochemical performance of the materials . The test results show that the samples have perfect conductivity , high specific capacitance and stable performance with a longer cycle life. They could be used as the effective electrode materials for supercapacitors.

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李学良.多元酸催化炭气凝胶的常压制备及表征[J].精细化工,2010,27(9):

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  • 收稿日期:2010-05-24
  • 最后修改日期:2010-06-21
  • 录用日期:2010-06-29
  • 在线发布日期: 2010-08-19
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