氮等离子体表面改性对ACF吸附性能的影响

Influence of Surface Treatment by Nitrogen Plasma on Absorption Property of AC

采用氮等离子体对活性炭纤维(ACF)进行表面改性,通过扫描电子显微镜(SEM)、傅立叶变换红外光谱(FT-IR)、X射线光电子能谱分析(XPS)和结晶紫溶液降解实验等方法,研究了等离子体对ACF的表面形貌、化学成分和吸附性能的影响。SEM显示:氮等离子体对于放电区和余辉区ACF刻蚀作用不同。XPS表明:等离子体改性后,放电区、余辉区60 cm处ACF表面的羰基含量由未改性ACF的82.69%下降到37.16%和53.09%;放电区、余辉区60 cm处ACF表面的羧基含量由未改性ACF的0增加到29.39%和31.17%。等离子体改性提高了放电区、余辉区60 cm处ACF对结晶紫溶液的吸附性能。

Activated carbon fiber （ACF） was treated by nitrogen plasma, and the surface morphology, chemical composition, and absorption properties of the plasma-treated ACF were characterized by scanning electron microscopy （SEM）, Fourier transform infrared spectroscopy （FT-IR）, X-ray photoelectron spectroscopy （XPS）, and degradation of aqueous crystal violet. SEM displayed etching for ACF in discharge region different from that for ACF in afterglow region. Compared with the raw ACF, XPS showed that the content of carbonyl on the surface of ACF treated in discharge region and 60 cm afterglow region decreased from 82.69% to 37.16% and 53.09%. Furthermore, the content of carboxyl on the surface of ACF treated in discharge region and 60 cm afterglow region increased from 0% to 29.39% and 31.17%, respectively. Plasma treatment improved absorption property of treated ACF in discharge region and 60 cm afterglow region for crystal violet