Dramatic change of water-cluster accessibility of highly pure double-walled carbon nanotubes with high temperature annealing.
Highly pure double-walled carbon nanotubes (DWCNTs) synthesized by a catalytic chemical vapour deposition method have a well-ordered bundle structure giving explicit diffraction peaks by synchrotron X-ray diffraction measurement. The changes of nanopore structural properties and water adsorptivity of DWCNTs with high-temperature heat treatment were investigated using molecular probe adsorption methods. It was founded that their nanoporosities and apparent hydrophilicities decreased with thermal annealing. However, a specific surface area of 275 m(2) g(-1) and the residual microporosity of more than 60% even after heat treatment at 2673 K suggest their unique applications.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. tao@fjirsm.ac.cn
Yousheng
Y
Tao
Hiroyuki
H
Muramatsu
Kyoichi
K
Oshida
Morinobu
M
Endo
Katsumi
K
Kaneko
D000327:Adsorption; D015335:Molecular Probes / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
D015335:Molecular Probes; D037742:Nanotubes, Carbon; D014867:Water