氧化石墨烯改性活性炭纤维滤除卷烟主流烟气的释放物

Filtration of Released Components in Cigarette Mainstream Smoke by Applying Graphene Oxide Modified Activated Carbon Fiber

研究了卷烟滤嘴中添加氧化石墨烯(GO)改性活性炭纤维(ACF)复合材料对卷烟主流烟气释放物的滤除作用。采用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)和比表面积测定对材料进行分析,结果显示GO均匀地负载在ACF表面;与原ACF相比,GO-ACF材料的O1s峰向低结合能移动,峰形平滑,同时表面积和总孔容变大。添加GO-ACF至滤嘴的卷烟,其苯酚、氰化氢和醛酮类的释放量均比只添加ACF的卷烟释放量低,且除乙醛外均比原样降低10%以上,其中苯酚和巴豆醛的降幅达26.7%和33.1%。对烟气释放物的滤除机制研究表明,在ACF表面修饰上GO后,材料表面含有丰富的羟基、羧基、碳氧和共轭基团,活性位点增多,易与烟气中的共轭分子和极性分子发生作用。该方法量少高效,为GO二维纳米材料在卷烟领域的应用奠定了基础。

The filtration of released components in the mainstream cigarette smoke by adding graphene oxide（GO） modified activated carbon fiber（ACF） into the cigarette filter was studied.The materials were characterized by scanning electron microscope（SEM）,X-ray powder diffraction（XPS） and surface area measurements.The results showed that GO was coated on ACF uniformly.Compared with ACF,the binding energy of O1s in GO-ACF became lower and the peak became more smooth,also,the surface area and the total pore volume increased.Adding GO-ACF to the cigarette filter could result in its contents of phenol,hydrocyanic acid,aldehydes and ketones all lower than those in the ACF filter cigarettes,in which the contents of components all decreased by at least 10% except for aldehyde,and the reductions of phenol and crotonaldehyde were up to 26.7% and 33.1%,respectively.The study on the mechanism of the filtration indicated that,after modifying GO onto ACF,the active sites increased,since the material surface became rich in hydroxyl,carboxyl,carbonyl and conjugated groups which could interact with conjugated or polar molecules easily.This method was effective,and laid a foundation for the application of two dimensional nano materials,such as GO,in cigarette science.