Hydrothermal conversion of graphite to carbon nanotubes (CNTs) induced by bubble collapse |
| |
| Institution: | 1. Department of Electrical Engineering, Hsiuping University of Science and Technology, Taichung 412, Taiwan;2. Department of Applied Physics, Tunghai University, Taichung 407, Taiwan;3. iSentek Ltd., Advanced Sensor Laboratory, New Taipei City 221, Taiwan;4. Department of Physics, National Chung Cheng University, Chia-Yi 621, Taiwan;1. School of Material Science and Engineering, Hunan University, Changsha, Hunan 410082, China;2. Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha, Hunan 410082, China;1. Department of Physics, CCEN, Universidade Federal da Paraíba, 58051-970 João Pessoa, PB, Brazil;2. Department of Physics, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil;3. LIEC - Department of Chemistry, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil;4. Institute of Chemistry, Universidade Estadual Paulista – Unesp, 14801-907 Araraquara, SP, Brazil;1. University of Technology, Sydney, NSW, Australia;2. CSIRO, Sydney, NSW, Australia;3. Florida Atlantic University, FL, USA |
| |
| Abstract: | Cu–Fe–CNTs and Ni–Fe–CNTs coatings were deposited on gray cast iron by a hydrothermal approach. It was demonstrated that, the flaky graphite of gray cast iron was exfoliated to graphene nanosheets under hydrothermal reactions, and graphene nanosheets were scrolled to CNTs. After high temperature treatments, the volume losses of Cu–Fe–CNTs and Ni–Fe–CNTs coatings were 52.6 % and 40.0 % of gray cast iron substrate at 60 min wear tests, respectively, obviously increasing the wear properties of gray cast iron. During hydrothermal reactions, water jets and shock waves were produced by bubble collapse. Induced by the water jets and shock waves, exfoliation of flaky graphite was performed, producing exfoliated graphene nanosheets. Attacked by the radially distributed water jets and shock waves, graphene nanosheets were curved, shaped to semicircle morphology and eventually scrolled to tubular CNTs. |
| |
| Keywords: | Hydrothermal Bubble Carbon nanotubes (CNTs) Gray cast iron Coating |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
