TY - JOUR
T1 - Controllable and large-scale synthesis of metal-free carbon nanofibers and carbon nanocoils over water-soluble NaxKy catalysts
AU - Qi, Xiaosi
AU - Zhong, Wei
AU - Yao, Xiujuan
AU - Zhang, Han
AU - Ding, Qian
AU - Wu, Qiong
AU - Deng, Yu
AU - AU, Chak Tong
AU - Du, Youwei
N1 - Funding Information:
We would like to thank the Foundation of the National Key Project for Basic Research (Grant Nos. 2011CB922102 and 2010CB923402 ), National Laboratory of Solid State Microstructures, Nanjing University (Grant No. 2010ZZ18 ), and Discipline Crossing Foundation of Nanjing University, People’s Republic of China , for financial support.
PY - 2012/2
Y1 - 2012/2
N2 - Through the pyrolysis of acetylene at 450 °C, large quantities of carbon nanocoils or carbon nanofibers can be synthesized selectively by controlling the Na:K molar ratio of water-soluble NaxKy catalysts. We found that the temperature adopted for pyrolysis is an important factor for selectively obtaining the different kinds of products. Because the NaxKy catalysts are water-soluble, they can be easily removed, and the nanocarbon materials can be harvested undamaged in high purity. The process is simple, inexpensive, and environment-benign, giving a product yield matching those of the transition-metal catalysts. Based on the results, we conducted discussion on the role of catalyst, effect of pyrolysis temperature, and formation mechanism of the nanomaterials.
AB - Through the pyrolysis of acetylene at 450 °C, large quantities of carbon nanocoils or carbon nanofibers can be synthesized selectively by controlling the Na:K molar ratio of water-soluble NaxKy catalysts. We found that the temperature adopted for pyrolysis is an important factor for selectively obtaining the different kinds of products. Because the NaxKy catalysts are water-soluble, they can be easily removed, and the nanocarbon materials can be harvested undamaged in high purity. The process is simple, inexpensive, and environment-benign, giving a product yield matching those of the transition-metal catalysts. Based on the results, we conducted discussion on the role of catalyst, effect of pyrolysis temperature, and formation mechanism of the nanomaterials.
UR - http://www.scopus.com/inward/record.url?scp=80055080496&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2011.08.076
DO - 10.1016/j.carbon.2011.08.076
M3 - Journal article
AN - SCOPUS:80055080496
SN - 0008-6223
VL - 50
SP - 646
EP - 658
JO - Carbon
JF - Carbon
IS - 2
ER -