电纺PAN纳米纤维的石墨化调控及对NO的催化性能  

Graphitization control and NO catalytic performance of electrospinning PAN nanofibers

作　　者：郭泽宇[1,2] 刘宣材 黄贺东 杨鹏艳 李军 薛振华[1,2] GUO Ze-yu;LIU Xuan-cai;HUANG He-dong;YANG Peng-yan;LI Jun;XUE Zhen-hua(College of Material Science and Art Design,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Key Laboratory of Sandy Shrubs Fibrosis and Energy Development and Utilization,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学材料科学与艺术设计学院,呼和浩特010018 [2]内蒙古农业大学内蒙古沙生灌木资源纤维化和能源化利用重点实验室,呼和浩特010018

出　　处：《天津工业大学学报》2020年第4期20-25,共6页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(51962029,51602162);内蒙古自治区科技计划项目(2019GG265);内蒙古自治区高等学校“青年科技英才计划”(NJYT-19-A08);内蒙古自治区自然科学基金面上项目(2018MS05024);内蒙古农业大学高层次人才引进科研启动项目(NDGCC2016-20);内蒙古自治区高等学校科学研究项目(NJZZ17054)。

摘　　要：为提高碳纳米纤维在接近室温下(20℃)对低浓度一氧化氮(NO,50 mg/L)的催化氧化性能,采用高压静电纺丝法制备聚丙烯腈(PAN)基碳纳米纤维,经预氧化、碳化和活化处理工艺,得到了具有高孔隙率和高比表面积结构的碳纳米纤维(PCNF);通过对纤维的碳化和活化温度(800、850、900、950℃)的调控,获得了一系列具有石墨化度且孔结构和比表面积可控的多孔碳纳米纤维;将制备的碳纳米纤维用于接近室温下(20℃)对低质量浓度NO(50 mg/L)的催化氧化脱除。结果表明:不同碳纳米纤维的石墨化度对低浓度的NO呈现出不同的催化活性,同时对碳纳米纤维的孔结构和比表面积也有规律性的影响,当石墨化度为0.85时对NO的催化氧化效率最大为3.4%。In order to improve the catalytic oxidation performance of carbon nanofibers at low concentrations of nitric oxide(NO,50 mg/L)at near room temperature(20℃),polyacrylonitrile(PAN)carbon nanofiber precursors were used to prepare carbon nanofibers by electrospinning.After pre-oxidation,carbonization and activation treatment processes,PAN-based carbon nanofibers(PCNFs)were obtained with developed porosity and high specific surface area structure.By adjusting the carbonization and activation temperature of the fiber(800,850,900,950℃),a series of porous carbon nanofibers with graphitization degree and controllable pore structure and specific surface area were obtained.The prepared carbon nanofibers(PCNFs)were used for the removal of low concentration NO(50 mg/L)at near room temperature(20℃).The results show that the different graphitization degree of carbon nanofibers exhibit different catalytic activities for low concentrations of NO.At the same time,it also has a regular effect on the pore structure and specific surface area of carbon nanofibers.When the graphitization degree is 0.85,the maximum catalytic oxidation efficiency for NO is 3.4%.

关 键 词：静电纺丝 碳纳米纤维 NO脱除 催化氧化 

分 类 号：TS102.523[轻工技术与工程—纺织工程]