石油与天然气化工2023，Vol.52Issue(6)：39-43,5.DOI:10.3969/j.issn.1007-3426.2023.06.006
碳酸钾催化制备螺旋纳米碳纤维
Preparation of helical carbon nanofibers catalyzed by potassium carbonate
摘要
Abstract
Objective The residual catalyst during the preparation of helical carbon nanofibers(HCNFs)can affect its intrinsic properties.Acid washing is often used to remove the catalyst in helical carbon nanofibers,but it can destroy the structure of the fiber and increase the cost of use.Helical carbon nanofibers were prepared by using water-soluble salt as catalyst,and the catalyst was removed by washing to obtain high-purity helical carbon nanofibers.Methods Helical carbon nanofibers were prepared by chemical vapor deposition using potassium carbonate as catalyst and acetylene as carbon source.The potassium carbonate catalyst was removed by simple water washing,and the effect of preparation temperature on the morphology of helical carbon nanofibers was investigated.The microstructure and elemental composition of the helical carbon nanofibers were characterized by field emission scanning electron microscopy,transmission electron microscopy and energy dispersive spectroscopy.The crystal structure and surface functional groups of the helical carbon nanofibers were characterized by X-ray diffraction,Raman spectroscopy and Fourier transform infrared spectroscopy.Results The helical carbon nanofibers prepared at 700℃have a diameter of about 60 nm,a helical structure and a uniform morphology.The carbon atoms of HCNFs are arranged in a short-range order,mainly composed of C-H and C=C functional groups.The potassium carbonate catalyst has a rhombic symmetrical structure in the fiber,resulting in a chiral symmetrical growth of the fiber on both sides of the catalyst.Conclusions Helical carbon nanofibers with uniform morphology were prepared by chemical vapor deposition.High purity helical carbon nanofibers can be obtained by washing off the surface catalyst.关键词
碳酸钾/螺旋纳米碳纤维/化学气相沉积法/催化裂解/生长机理Key words
potassium carbonate/helical carbon nanofibers/chemical vapor deposition method/catalytic cracking/growth mechanism引用本文复制引用
龚勇,罗利,潘忠文,谢纯,崔瑾,姜波..碳酸钾催化制备螺旋纳米碳纤维[J].石油与天然气化工,2023,52(6):39-43,5.基金项目
泸州市科技计划项目(2022-YJY-125) （2022-YJY-125）
材料腐蚀与防护四川省重点实验室项目(2022CL21) （2022CL21）
精细化工应用技术泸州市重点实验室项目(HYJH-2103-B) （HYJH-2103-B）
智能控制与电子器件应用技术泸州市重点实验室开放基金项目(ZK202208) （ZK202208）
泸州职业技术学院高层次人才科研启动项目(LZYGCC202104) （LZYGCC202104）
