超大比表面石油沥青基碳纤维微电极研究

STUDY OF EXTRA SPECIFIC SURFACE AREA MICROELECTRODE OF PETROLEUM ASPHALT FIBER

作者研制了一种以石油沥青基碳纤维为电极材料的微电极,基于此种材料的特殊性能,经氧化处理后可获得较一般微电极为大的比表面积,困而其电流响应亦较一般微电极为大.且由于其表面在一定条件下可生成大量的碳氢基团,故其电极电位会随溶液pH值而线性变化,以至该电极亦可用作测量pH值的微电极.

The authors have made a microelectrode with the material of petroleum asphalt fiber. The electrode can form a larger specific surface area after treatment of oxidation than the normal carbon fiber microelectrode bacause of its special composition and property. Thus the current respondence is also greater than the normal microelectrode. On other hand, the potential of electrode will linear response with the change of solution acidity because there are aboundant carbon-oxygen groups on the surface of microelectrode after treatment of oxidation. Furthermore, these carbonoxygen groups will be the base to bring about the chemical modifying on electrod surface.