Gas flow rate and synthesis time dependence of MWCNT growth by chemical vapour deposition

Kara, M. H.; Teh, A. Awang; Ahmad, Roslina; Rusop, M.; Awang, Zaiki

doi:10.1109/rfm.2011.6168767

Cited by 4 publications

References 21 publications

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Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Chiou

Hsu

2015

J Biomed Mater Res

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This work presents an amino plasma‐enhanced chemical vapour deposition (NH3 PECVD) treatment to modify multiwall carbon nanotubes (MWCNTs) for the immobilization of antibodies (IgG‐gold), and the effects of treatment time were studied. A titanium nitride (TiN) buffer layer and a nickel catalyst layer were deposited on silicon substrates for synthesis of MWCNTs using thermal CVD. The MWCNTs were modified by amine (NH2−) or amino (NH−) functional groups for 1, 3, and 5 min by PECVD, respectively. Mouse IgG‐golds were immobilized on the modified MWCNTs using glutaraldehyde (GA) as a crosslinker. The performance of the modified MWCNTs was characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FT‐IR), contact angle system (CA), X‐ray photoelectron spectroscopy (XPS, ESCA), and UV–visible spectroscopy. Results show that the efficiency of IgG‐gold immobilization was increased with the increase of NH3 PECVD treatment time. The NH3 PECVD treatment changed the surface properties of the MWCNTs, tuning them more hydrophilic without affecting their structure. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1343–1351, 2016.

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Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Chiou

Hsu

2015

J Biomed Mater Res

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Full factorial design approach to carbon nanotubes synthesis by CVD method in argon environment

Mohammed

Bankole

Abdulkareem

et al. 2017

South African Journal of Chemical Engineering

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Simultaneous production of syngas and carbon nanotubes from CO2/CH4 mixture over high-performance NiMo/MgO catalyst

Sae-tang,

Saconsint,

Srifa

et al. 2024

Sci Rep

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Direct conversion of biogas via the integrative process of dry reforming of methane (DRM) and catalytic methane decomposition (CDM) has received a great attention as a promising green catalytic process for simultaneous production of syngas and carbon nanotubes (CNTs). In this work, the effects of reaction temperature of 700–1100 °C and CH4/CO2 ratio of biogas were investigated over NiMo/MgO catalyst in a fixed bed reactor under industrial feed condition of pure biogas. The reaction at 700 °C showed a rapid catalyst deactivation within 3 h due to the formation of amorphous carbon on catalyst surface. At higher temperature of 800–900 °C, the catalyst can perform the excellent performance for producing syngas and carbon nanotubes. Interestingly, the smallest diameter and the highest graphitization of CNTs was obtained at high temperature of 1000 °C, while elevating temperature to 1100 °C leads to agglomeration of Ni particles, resulting in a larger size of CNTs. The reaction temperature exhibits optimum at 800 °C, providing the highest CNTs yield with high graphitization, high syngas purity up to 90.04% with H2/CO ratio of 1.1, and high biogas conversion (XCH4 = 86.44%, XCO2 = 95.62%) with stable performance over 3 h. The typical composition biogas (CH4/CO2 = 1.5) is favorable for the integration process, while the CO2 rich biogas caused a larger grain size of catalyst and a formation of molybdenum oxide nanorods (MoO3). The long-term stability of NiMo/MgO catalyst at 800 °C showed a stable trend (> 20 h). The experimental findings confirm that NiMo/MgO can perform the excellent activity and high stability at the optimum condition, allowing the process to be more promising for practical applications.

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Gas flow rate and synthesis time dependence of MWCNT growth by chemical vapour deposition

Cited by 4 publications

References 21 publications

Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Full factorial design approach to carbon nanotubes synthesis by CVD method in argon environment

Simultaneous production of syngas and carbon nanotubes from CO2/CH4 mixture over high-performance NiMo/MgO catalyst

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Gas flow rate and synthesis time dependence of MWCNT growth by chemical vapour deposition

Cited by 4 publications

References 21 publications

Effects of NH3 PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Effects of NH3 PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Full factorial design approach to carbon nanotubes synthesis by CVD method in argon environment

Simultaneous production of syngas and carbon nanotubes from CO2/CH4 mixture over high-performance NiMo/MgO catalyst

Contact Info

Product

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Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization

Effects of NH₃ PECVD treatment time on the performance of multiwall carbon nanotubes for antibody immobilization