摘要
采用爆炸辅助化学气相沉积法,以碳纳米管(CNTs)作催化剂,三聚氰胺作碳源和氮源,无金属催化剂合成出氮掺杂碳纳米管(CNx).通过TEM、EDS、Mapping、XPS、Raman和TG测试手段对CNx进行了表征.结果表明,CNx具有竹节状结构,其掺氮量高达17at%,且氮元素分布均匀.氮元素以石墨型和吡啶型掺杂在石墨层中,由于大量氮元素掺杂造成纳米管石墨化程度降低,抗氧化能力减弱.
Nitrogen-doped carbon（CNx） nanotbues were synthesized by detonation-assisted chemical vapor deposition with carbon nanotubes（CNTs） as catalysts and melamine as carbon/nitrogen sources.CNTs exhibit high catalytic activity for the metal-catalyst-free synthesis of CNx nanotubes.TEM,EDS,Mapping,XPS,Raman and TG were performed to characterize the synthesized CNx nanotubes.CNx nanotubes exhibit com-partmentalized bamboo-like structure,and contain high concentration of nitrogen（ca.17at%）,which is ho-mogeneously distributed within compartment layers and tube walls.The pyridine-like and graphitic N are in-corporated into the graphitic network.The nitrogen doping induces the decrease of the graphitization degree and results in lower oxidation-resistance temperature.The synthesis of CNx nanotubes without metal catalysts will facilitate the applications of CNx nanotubes.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第8期881-884,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(50730003
50672025
20806024
51002051)
国家863重点项目(2008AA062302)~~
关键词
碳纳米管
无金属催化剂
氮掺杂
carbon nanotubes
metal-catalyst-free
nitrogen-doped
