Large-scale and controllable synthesis of metal-free nitrogen-doped carbon nanofibers and nanocoils over water-soluble Na2CO3
1 Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
2 Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, People’s Republic of China
3 College of Science, Guizhou University, Guiyang, 550025, People’s Republic of China
4 Chemistry Department, Hong Kong Baptist University, Hong Kong 852, People’s Republic of China
Nanoscale Research Letters 2013, 8:545 doi:10.1186/1556-276X-8-545Published: 27 December 2013
Using acetylene as carbon source, ammonia as nitrogen source, and Na2CO3 powder as catalyst, we synthesized nitrogen-doped carbon nanofibers (N-CNFs) and carbon nanocoils (N-CNCs) selectively at 450°C and 500°C, respectively. The water-soluble Na2CO3 is removed through simple washing with water and the nitrogen-doped carbon nanomaterials can be collected in high purity. The approach is simple, inexpensive, and environment-benign; it can be used for controlled production of N-CNFs or N-CNCs. We report the role of catalyst, the effect of pyrolysis temperature, and the photoluminescence properties of the as-harvested N-CNFs and N-CNCs.