摘要
以蒸汽爆破处理后的杨木为原料,采用两步碳化法制备了超高比表面积多孔碳材料。通过扫描电子显微镜以及N_(2)吸附-脱附对其表面形貌及比表面积进行了表征分析,该材料的比表面积最高可达3209 m^(2)/g。吸附实验表明,在汽爆处理杨木的基础上,通过添加尿素制备的多孔碳SE-PC-N对亚甲基蓝的吸附性能最佳,其吸附容量最高可达1540 mg/g,有望在印染工业进行应用,具有较好的应用前景。通过对吸附过程的动力学分析可知,SE-PC-N吸附MB的动力学机制符合二级动力学模型,即在吸附过程中化学吸附处于主导地位。
Porous carbon materials with ultra-high specific surface area were prepared by a two-step carbonization from poplar after steam explosion treatment.The obtained porous carbon samples were characterized by SEM and nitrogen adsorption-desorption analysis.The results showed that the highest specific surface areawas 3209 m2/g.Adsorption experiments showed that,based on steam-exploded poplar wood,the porous carbon SE-PC-N prepared by adding urea exhibited the best adsorption performance for methylene blue(MB),with a maximum adsorption capacity of 1540 mg/g.This high adsorption capacity for MB molecules indicates its potential application in the printing and dyeing industry,presenting promising prospects.Kinetic analysis of the adsorption process revealed that the kinetic mechanism of MB adsorption by SE-PC-N conforms to the second-order kinetic model,indicating that chemical adsorption dominates the adsorption process.
作者
辛洁婷
惠岚峰
张婷婷
陈智娴
朱承峰
XIN Jieting;HUI Lanfeng;ZHANG Tingting;CHEN Zhixian;ZHU Chengfeng(Tianjin Key Laboratory of Pulp and Paper,College of Light Industry Science and Engineering,Tianjin University of Science and Technology,Tianjin 300457,China)
出处
《造纸与纤维材料》
2025年第2期31-35,共5页
PAPER MAKING AND FIBER MATERIALS
关键词
多孔碳
杨木
比表面积
亚甲基蓝
porous carbon
poplar
specific surface area
methylene blue
