Effects of catalysts state on the synthesis of MWCNTs modified expanded graphite through microwave-assisted pyrolysis of ethanol

Liao, Ning; Jin, Shengli; Liu, Gengfu; Wan, Qijin; Sang, Shaobai; Su, Dandan

doi:10.1007/s10853-017-1333-x

Cited by 9 publications

(2 citation statements)

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“…The wall thickness was approximately 7 nm. Using of ferrocene as a catalyst in the CVD process led to the formation of MWCNTs, agreeing with previous studies by Khan et al and Li et al also proposed that ferrocene act as a catalyst can largely formation of MWCNTs [7,21,27]. Figure 2c demonstrates that the carbon nanotubes possessed a bamboo-like structure, as shown by the wrinkles, the compartments, and the curvatures of the tube walls.…”

Section: Electrochemical Measurementssupporting

confidence: 87%

“…Conversely, the Fe content after the CVD process decreased to approximately 0.9 wt%, indicating that the Fe played as a nucleation role for the formation of CNTs. The synthesized CNTs contained a high amount of carbon (85.2 wt%) with some other elements, including O (13.9 wt%) and Fe (0.9 wt%), which corresponded with the results reported by Zhu et al, Araga and Sharma, and Liao et al [19][20][21]. Furthermore, the EDS mapping (Figure 1b) shows that the Fe catalyst was well distributed over the biochar surface.…”

Section: Electrochemical Measurementssupporting

confidence: 87%

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Synthesis, characterization, and electrochemical properties of carbon nanotubes used as cathode materials for Al–air batteries from a renewable source of water hyacinth

Sasrimuang

Chuchuen

Artnaseaw

2020

Green Processing and Synthesis

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AbstractWater hyacinth (WH) is a noxious weed. Its rapid growth can clog waterways, causing widespread ecological and environmental threats as well as power generation and irrigation issues. In the present study, water hyacinth was utilized as a precursor to synthesize multiwall carbon nanotubes (MWCNTs) using a simple chemical vapor deposition method. FESEM-EDS revealed that the synthesized MWCNTs had noodle-like, dense, and rough surfaces. TEM confirmed that MWCNTs had a bamboo-like structure with the diameter of 30–40 nm, and the wall thickness of approximately 7 nm. The interlayer distance was found to be approximately 0.34 by XRD. Raman spectra displayed three major bands of MWCNTS: D-band at 1,340 cm−1, G-band at 1,596 cm−1, and (D + G)-band between 2,783 and 2,953 cm−1. The ratio of the D-to-G band intensity was 0.94 ± 0.03, indicating that the synthesized MWCNTs had well degree of graphitization. Electrochemical measurement results of the prepared MWCNTs cathode for aluminum–air battery showed that MWCNTs exhibited higher energy capacity than commercial graphite. Collectively, this study shows that water hyacinth could be used effectively as a precursor for the production of MWCNTs, thus successfully converting the noxious weed into high value-added materials.

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Section: Electrochemical Measurementssupporting

confidence: 87%

Section: Electrochemical Measurementssupporting

confidence: 87%