Engineering All‐Purpose Amorphous Carbon Nanotubes with High N/O‐Co‐Doping Content to Bridge the Alkali‐Ion Batteries and Li Metal Batteries

Small ◽  
2021 ◽  
pp. 2006566
Author(s):  
Xiao‐Hua Zhang ◽  
Ru Jiang ◽  
Chao‐Ying Fan ◽  
Dan Xie ◽  
Bao Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Doping Content ◽  
Co Doping ◽  
Alkali Ion

The Synthesis and Optical Properties of Zinc-Nitrogen Co-Doped TiO2 Thin Films Using Sol–Gel Derived Spin-Coating Method

2021 ◽  
Vol 16 (6) ◽  
pp. 967-973
Author(s):  
Shuai Zhao ◽  
Dong-Xue Lin ◽  
Yu-Xin Wang
Keyword(s):  
Optical Properties ◽  
Spin Coating ◽  
Sol Gel ◽  
Crystal Plane ◽  
Utilization Rate ◽  
Doping Content ◽  
Spin Coating Method ◽  
Co Doping ◽  
Coating Method ◽  
N Doping

All of the TiO2 films including intrinsic TiO2 film, Zn single doped film with 2.0 at% content and N doped films with 4.0 at%, 6.0 at%, 8.0 at% and 10.0 at% content, were obtained by butyl titanate (Ti(OC4H9)4) as a titanium source, zinc nitrate (Zn(NO3)2·6H2O) as zinc source and urea (H2 NCONH2) as nitrogen source, which was calcined at 600 °C on the glass substrate and Si substrate using sol–gel spin coating method. The structures, morphology and optical properties of various films were analyzed and studied by X ray diffract meter (XRD), ultraviolet-visible spectrophotometer (UV-Vis) and scanning electron microscope (SEM). The results indicated that the main crystal plane of TiO2 film was (101) and any impurity crystal plane didn't appear. All samples had obvious red shifts in the absorbing edge overall and reduced significantly the width of forbidden band, especially, the N doping content with 8.0 at% was surprised to investigate the strongest (101) peak intensity, the sharpest peak type, the best meritocratic orientation, the greatest red shift of the absorption spectrum, the lowest optical band gap value of 3.356 eV, and the highest utilization rate of visible light of the sample. However, the surface morphology of the others films except the N doping content with 8.0 at% is not further improved by co-doping, that is, their surfaces were still rough, had obvious voids and uneven distribution between the grains. Meanwhile, the intensity of the (101) crystalline diffraction peaks of these samples were reduced and the crystalline spacing generally increased after co-doping.

Opposite effects of self-growth amorphous carbon and carbon nanotubes on the reforming of toluene with Ni/α-Al 2 O 3 for hydrogen production

2017 ◽  
Vol 42 (21) ◽  
pp. 14439-14448 ◽  
Author(s):  
Limo He ◽  
Song Hu ◽  
Long Jiang ◽  
Syed Shatir A. Syed-Hassan ◽  
Yi Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Production ◽  
Amorphous Carbon

Preferential Growth of Carbon Nanotubes/Nanofibers Using Lithographically Patterned Catalysts

2001 ◽  
Vol 675 ◽  
Author(s):  
K. B. K. Teo ◽  
M. Chhowalla ◽  
G. A. J. Amaratunga ◽  
W. I. Milne ◽  
G. Pirio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Deposition Process ◽  
High Yield ◽  
Full Potential ◽  
Carbon Nanofibres ◽  
Preferential Growth ◽  
Plasma Decomposition

ABSTRACTIn order to utilise the full potential of carbon nanotubes/nanofibers, it is necessary to be able to synthesize well aligned nanotubes/nanofibres at desired locations on a substrate. This paper examines the preferential growth of aligned carbon nanofibres by PECVD using lithographically patterned catalysts. In the PECVD deposition process, amorphous carbon is deposited together with the nanotubes due to the plasma decomposition of the carbon feed gas, in this case, acetylene. The challenge is to uniformly nucleate nanotubes and reduce the unwanted amorphous carbon on both the patterned and unpatterned areas. An etching gas (ammonia) is thus also incorporated into the PECVD process and by appropriately balancing the acetylene to ammonia ratio, conditions are obtained where no unwanted amorphous carbon is deposited. In this paper, we demonstrate high yield, uniform, ‘clean’ and preferential growth of vertically aligned nanotubes using PECVD.

Low temperature growth of carbon nanotubes on tetrahedral amorphous carbon using Fe–Cu catalyst

Carbon ◽  
2015 ◽  
Vol 81 ◽  
pp. 639-649 ◽  
Author(s):  
R. Cartwright ◽  
S. Esconjauregui ◽  
D. Hardeman ◽  
S. Bhardwaj ◽  
R. Weatherup ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Amorphous Carbon ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Tetrahedral Amorphous Carbon ◽  
Cu Catalyst

Spontaneous formation of carbon nanotubes and polyhedra from cesium and amorphous carbon

1998 ◽  
Vol 292 (3) ◽  
pp. 352-356 ◽  
Author(s):  
Mark G. Stevens ◽  
Shekhar Subramoney ◽  
Henry C. Foley
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Carbon ◽  
Spontaneous Formation
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