活性碳纤维氧化还原机理初探

在系统研究了活性碳纤维(ACF)氧化还原功能特征的基础上,进一步利用 X 射线衍射、红外、核磁及化学分析等技术,研究了 ACF 在惰性气氛中,非水介质中的氧化还原特性以及ACF 比表面积、表面官能团、水等对氧化还原性能的影响,从面对 ACF 的氧化还原反应机理提出了一些新的见解。实验结果表明,ACF 的氧化还原功能与空气(氧等)的吸附无关,主要是由于 ACF 表面的官能团所引起,其官能团不仅仅是≥C—OH,在有水存在时,≥C—H、甚至>C=O 也参与氧化还原反应,并且还是主要的反应.水对氧化还原容量影响甚大.ACF 的氧化还原容量随比表面积变化不大。

INVESTIGATION OF THE REDOX MECHANISM OF ACTIVATED CARBON FIBER

On the basis of the investigation on the redox function characteristics of activa-ted carbon fiber,using various experimental technologies,this paper goes furtherinto the principles governing the redox reaction of ACF.Some new ideas are presentedin the paper.lt is put forward that the redox ability of ACF is acted by the surfacegroups on ACF,but has nothing to do with the gasses(air,oxygen and so on)absorbed on ACF.The surface groups governing redox ability include not only C—OH,but also C—H and C=O when there is water in reaction system,and the fatters maybe the main redox surface groups.The redox capacity of ACF is of great concern tothe water,but not changed obviosly with the specific surface area.