Effects of Nitric Acid and Heat Treatment on Hydrogen Adsorption of Single-Walled Carbon Nanotubes

2007 ◽  
Vol 60 (7) ◽  
pp. 519 ◽  
Author(s):  
H. Takagi ◽  
Y. Soneda ◽  
H. Hatori ◽  
Z. H. Zhu ◽  
G. Q. Lu
Keyword(s):  
Heat Treatment ◽  
Nitric Acid ◽  
Acid Treatment ◽  
Hydrogen Adsorption ◽  
Subsequent Heat Treatment ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Swcnt Sample ◽  
Walled Carbon Nanotubes ◽  
Bundle Structure

The effects of nitric acid treatment and subsequent heat treatment on the hydrogen adsorption properties of single-walled carbon nanotube (SWCNT) samples were investigated. The hydrogen adsorption and desorption isotherms of SWCNTs treated with nitric acid alone and SWCNTs treated with nitric acid and then heated were measured at 77 and 303 K over the hydrogen pressure range 0–3.5 MPa. Nitric acid treatment increased hydrogen adsorption by opening the nanotubes and changing the bundle structure. Subsequent heat treatment of the acid-treated SWCNT sample further increased hydrogen adsorption by removing functional groups introduced by the acid treatment.

scholarly journals Supramolecular structures of terbium(iii) porphyrin double-decker complexes on a single-walled carbon nanotube surface

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28135-28145
Author(s):  
Ahmed I. A. Abd El-Mageed ◽  
Takuji Ogawa
Keyword(s):  
Carbon Nanotubes ◽  
Scanning Probe Microscopy ◽  
Single Walled Carbon Nanotubes ◽  
Supramolecular Structures ◽  
Scanning Probe ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Double Decker ◽  
Walled Carbon Nanotubes ◽  
First Time

For the first time, using scanning probe microscopy, the supramolecular structures of terbium porphyrin double-decker complexes were observed on single-walled carbon nanotubes surfaces, where the molecules formed a well-ordered self-assembled array.

scholarly journals Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes

1999 ◽  
Vol 74 (16) ◽  
pp. 2307-2309 ◽  
Author(s):  
Y. Ye ◽  
C. C. Ahn ◽  
C. Witham ◽  
B. Fultz ◽  
J. Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Cohesive Energy ◽  
Hydrogen Adsorption ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Free Vibration Analysis of Single Walled Carbon Nanotube with Exponentially Varying Stiffness

2018 ◽  
Vol 5 (1) ◽  
pp. 201-212 ◽  
Author(s):  
Subrat Kumar Jena ◽  
S. Chakraverty
Keyword(s):  
Free Vibration ◽  
Differential Quadrature Method ◽  
Free Vibration Analysis ◽  
Beam Theory ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Scaling Parameters ◽  
Governing Differential Equation ◽  
Theory Application ◽  
Walled Carbon Nanotubes

Abstract In this paper, Differential Quadrature Method (DQM) is applied to investigate free vibration of Single Walled Carbon Nanotubes (SWCNTs) with exponentially varying stiffness based on non-local Euler-Bernoulli beam theory. Application of DQ method in the governing differential equation converts the problem to a generalized eigenvalue problem and its solution gives frequency parameters. Convergence of the results show that DQM solutions converge fast. In this article, a detailed investigation has been reported and MATLAB code has been developed to analyze the numerical results for different scaling parameters as well as for four types of boundary conditions. Present results are compared with other available results and are found to be in good agreement.

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