Influence of annealing temperature on oxygen reduction activity of sputtered Co catalysts on vertically-aligned carbon nanotubes

2015 ◽  
Vol 161 ◽  
pp. 72-79 ◽  
Author(s):  
Zhijian Luo ◽  
Bin Zhao ◽  
Yunmei Liu ◽  
Huijuan Zhang ◽  
Zhihong Tang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Annealing Temperature ◽  
Vertically Aligned Carbon Nanotubes ◽  
Co Catalysts ◽  
Reduction Activity ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

Co-supported catalysts on nitrogen and sulfur co-doped vertically-aligned carbon nanotubes for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32676-32684 ◽  
Author(s):  
Yunmei Liu ◽  
Bin Zhao ◽  
Ying Zhang ◽  
Huijuan Zhang ◽  
Ke Zhan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Supported Catalysts ◽  
Reduction Reaction ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Co Doped

A high-performance ORR catalyst of Co supported on nitrogen and sulfur co-doped VACNTs was fabricated by cobalt sputtering and subsequent annealing in decomposition atmosphere of NH4SCN.

Effects of various annealing temperature on carbon nanotubes for N2 detection

2004 ◽  
Vol 828 ◽  
Author(s):  
Chien-Sheng Huang ◽  
Bohr-Ran Huang ◽  
Yung-Huang Jang ◽  
Chih-Fu Hsieh ◽  
Chia-Ching Wu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Annealing Temperature ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Vertically Aligned Carbon Nanotubes ◽  
X Ray ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Resistive Gas Sensors

ABSTRACTThe vertically aligned carbon nanotubes (CNTs) deposited by microwave plasma-enhanced chemical vapor deposition (MPCVD) were utilized as resistive gas sensors.The carbon nanotubes were annealed between 200 to 800°C under N2 flow (500 sccm) for 15 minute, respectively. After that, the carbon nanotubes were exposed to an N2 filling and pumping environment. Upon exposure to N2 the electrical resistance of vertically aligned carbon nanotubes was found to increase. It was found that the N2 absorption of unannealed carbon nanotubes was reversible, whereas which of annealing ones was not. However, the sensitivity of the N2 absorption on carbon nanotubes was improved after annealing. From the Raman spectra, the ID/IG ratio of carbon nanotubes also decreased after annealing, indicating that more graphenes were formed by the annealing process. Furthermore, from X-ray photoelectron spectroscopy (XPS), it was observed that the ratio of the oxygen to carbon (O/C) signal intensity increased from 0.094 to 3.943 as the annealing temperature increased. As a consequence, it was suggested that the surface of carbon nanotubes was oxygenated and the absorption of N2 changed from physisorption to chemisorption.

Correlation and Comparison Between Thermodynamic Aspects and Cytocompatibility of Cells on Superhydrophobic and Superhydrophilic Vertically Aligned Carbon Nanotubes

2013 ◽  
Vol 3 (2) ◽  
pp. 155-165 ◽  
Author(s):  
Teresa C.O. Marsi ◽  
Marcus A.F. Corat ◽  
Mirian M. Machado ◽  
Evaldo J. Corat ◽  
Fernanda R. Marciano ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

Efficient lithium storage from modified vertically aligned carbon nanotubes with open-ends

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68875-68880 ◽  
Author(s):  
Hyun Young Jung ◽  
Sanghyun Hong ◽  
Ami Yu ◽  
Sung Mi Jung ◽  
Sun Kyoung Jeoung ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Vertically Aligned Carbon Nanotubes ◽  
Structure And Morphology ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Controlled Structure

Herein, we report the use of vertically aligned carbon nanotubes (VA-CNTs) with controlled structure and morphology as an anode material for lithium-ion batteries.

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