Low-cost synthesis of multi-walled carbon nanotubes using red soil as catalyst

Yuan, Xinxin; Liang, Changhao; Ruan, Chao; Chang, Yi Kuei; Xu, Lele; Huang, Hailu; Chen, Minghai; Yong, Zhang

doi:10.1016/j.diamond.2021.108241

Cited by 17 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…High magnification SEM observations of clean VACNT carpets, obtained from mos of the synthesis conditions, indicate that the CNTs are well aligned and densely packed (Figure 3a-c). Individual CNT morphology, diameter and structure determined by TEM indicate the formation of multi-walled CNTs (MWNTs) whose mean external diameters are in the [6][7][8][9][10][11][12] nm range, whatever the synthesis conditions (Figure 3d,e). High magnification SEM observations of clean VACNT carpets, obtained from most of the synthesis conditions, indicate that the CNTs are well aligned and densely packed (Figure 3a-c).…”

Section: Synthesis and Vacnt Overall Characteristicsmentioning

confidence: 99%

“…High magnification SEM observations of clean VACNT carpets, obtained from most of the synthesis conditions, indicate that the CNTs are well aligned and densely packed (Figure 3a-c). Individual CNT morphology, diameter and structure determined by TEM, indicate the formation of multi-walled CNTs (MWNTs) whose mean external diameters are in the [6][7][8][9][10][11][12] nm range, whatever the synthesis conditions (Figure 3d,e). The iron content in VACNT samples grown on both substrate faces during intermediate duration (e.g., 80 min) and determined by TGA analysis is found to be 2.2 wt.% and 1.8 wt.% for high (15 vol%) and low (1.5 vol%) acetylene content, respectively.…”

Section: Synthesis and Vacnt Overall Characteristicsmentioning

confidence: 99%

“…The relatively cheap and simple CCVD process, whether developed in one or two steps, has been up-scaled and is now operated at an industrial scale. However, reducing the energetic costs of the process while keeping good overall synthesis kinetics is a major current goal [ 10 ], since VACNT growth is thermally activated [ 11 ]. Moreover, the demand of VACNT applications in fields such as textiles, electronics or energy storage drives VACNT growth towards reduction of the process temperature, since substrates used in such fields are generally sensitive to heat [ 9 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Critical Role of the Acetylene Content and Fe/C Ratio on the Thickness and Density of Vertically Aligned Carbon Nanotubes Grown at Low Temperature by a One-Step Catalytic Chemical Vapor Deposition Process

et al. 2022

View full text Add to dashboard Cite

The present work explores the role of the carbon source content and the Fe/C ratio on the synthesis of vertically aligned carbon nanotubes (VACNTs) by one-step aerosol-assisted CCVD operated at a medium temperature (615 °C) on aluminum substrates. The main objective was to overcome the limitations of VACNT growth, constituting a drawback for applications requiring thick VACNTs. By using acetylene as carbon feedstock and ferrocene as a catalyst precursor, we demonstrate that when acetylene content is reduced to 1.5 vol%, it is possible to grow VACNT carpets up to 700 µm thick while maintaining constant VACNT growth for a long duration (up to 160 min). The carbon conversion yield is significantly improved when the acetylene content reaches 1.5 vol%. The Al surface roughness also influences VACNT growth. An optimum Fe/C ratio of 0.8 wt.% coupled with a low acetylene content gives the highest growth rate (5.4 µm/min) ever reported for a thermal aerosol-assisted CCVD process operated at such a low temperature. The CNT number density can be controlled by varying the Fe/C ratio, enabling high density growth (e.g., 1.3 × 1011 CNT/cm2).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Vacnt Overall Characteristicsmentioning

confidence: 99%

Section: Synthesis and Vacnt Overall Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Critical Role of the Acetylene Content and Fe/C Ratio on the Thickness and Density of Vertically Aligned Carbon Nanotubes Grown at Low Temperature by a One-Step Catalytic Chemical Vapor Deposition Process

et al. 2022

View full text Add to dashboard Cite

show abstract

“…All examples show that the weight loss rate is the same. Percentage misfortune of significance of show and compressive strength was used to determine concrete's alkaline resistance [30][31][32][33][34][35].…”

Section: Properties Of Finementioning

confidence: 99%

Investigation on Mechanical and Durability Performance of Reinforced Concrete Containing Red Soil as Alternate for M‐Sand

Sebastin¹,

David²,

Karthick

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

The river sand is a primary parameter in the concrete structure. This work replaces accessible locally accessible substitution materials like red soil and manufactured sand (M-Sand). In this paper, the mechanical properties and durability of concrete containing red soil and M-Sand have been studied. In this investigation, M30 grade concrete was used, and tests were conducted for two sets of combinations; i.e., red soil as a partial replacement for river sand seems to be 20%, 30%, 40%, 50%, and 60%, and red soil as a partial replacement for manufactured sand (M-Sand) seems to be 60%, 50%, 40%, 30%, and 20%. The compressive strength (7 days, 28 days, 90 days), split tensile strength (28 days), and flexural strength (28 days) have been determined. The combination S4-50% river sand + 50 % red soil and S9-70% M- Sand + 30 % red soil gives more compressive strength than other combinations. Similarly, the combination S3-60% river sand + 40 % red soil and S6-40% M- Sand + 60 % red soil gives more flexural and split tensile strength than other combinations. The scanning electron microscope (SEM) analysis, EDAX analysis, and durability tests like alkalinity, sulfate attack, and chloride attack have also been studied.

show abstract

Dopamine removal from water by advanced oxidative processes with Fe/N-doped carbon nanotubes

Leon

Sacco

Zoppas

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

Low-cost synthesis of multi-walled carbon nanotubes using red soil as catalyst

Cited by 17 publications

References 39 publications

Critical Role of the Acetylene Content and Fe/C Ratio on the Thickness and Density of Vertically Aligned Carbon Nanotubes Grown at Low Temperature by a One-Step Catalytic Chemical Vapor Deposition Process

Critical Role of the Acetylene Content and Fe/C Ratio on the Thickness and Density of Vertically Aligned Carbon Nanotubes Grown at Low Temperature by a One-Step Catalytic Chemical Vapor Deposition Process

Investigation on Mechanical and Durability Performance of Reinforced Concrete Containing Red Soil as Alternate for M‐Sand

Dopamine removal from water by advanced oxidative processes with Fe/N-doped carbon nanotubes

Contact Info

Product

Resources

About