Continuous synthesis of high-crystalline carbon nanotubes by controlling the configuration of the injection part in the floating catalyst chemical vapor deposition process

PARK JIHONG; Park Junbeom; Lee Sung-Hyun; Kim， Seung Min

Carbon Letters

Abbr : Carbon Lett.
2020, 30(6), pp.613-619
Publisher : Korean Carbon Society
Research Area : Other Natural Sciences General

PARK JIHONG ¹, Park Junbeom ², Lee Sung-Hyun ³, Kim， Seung Min ⁴

¹한국과학기술원
²한국과학기술연구원
³한국과학기술연구원
⁴한국과학기술연구원

ABSTRACT

Continuous synthesis of high-crystalline carbon nanotubes (CNTs) is achieved by reconfguring the injection part in the reactor that is used in the foating catalyst chemical vapor deposition (FC-CVD) process. The degree of gas mixing is divided into three cases by adjusting the confguration of the injection part: Case 1: most-delayed gas mixing (reference experiment), Case 2: earlier gas mixing than Case 1, Case 3: earliest gas mixing. The optimal synthesis condition is obtained using design of experiment (DOE) in the design of Case 1, and then is applied to the other cases to compare the synthesis results. In all cases, the experiments are performed by varying the timing of gas mixing while keeping the synthesis conditions constant. Production rate (Case 1: 0.63 mg/min, Case 2: 0.68 mg/min, Case 3: 1.29 mg/min) and carbon content (Case 1: 39.6 wt%, Case 2: 57.1 wt%, Case 3: 71.6 wt%) increase as the gas-mixing level increases. The amount of by-products decreases step�wise as the gas-mixing level increases. The IG/ID ratio increases by a factor of 7 from 10.3 (Case 1) to 71.7 (Case 3) as the gas-mixing level increases; a high ratio indicates high-crystalline CNTs. The radial breathing mode (RBM) peak of Raman spectrograph is the narrowest and sharpest in Case 3; this result suggests that the diameter of the synthesized CNTs is the most uniform in Case 3. This study demonstrates the importance of confguration of the injection part of the reactor for CNT synthesis using FC-CVD.
KEYWORDS

Carbon nanotube (CNT) · Synthesis · Gas mixing · Floating catalyst chemical vapor deposition
REFERENCES (20)

[journal] Rabbani FA / 2016 / Catalytic synthesis of substrate-free, aligned and tailored high aspect ratio multiwall carbon nanotubes in an ultrasonic atomization head CVD reactor / J Nanomater 81 : 1~

[journal] Simate GS / 2014 / Kinetic model of carbon nanotube production from carbon dioxide in a floating catalytic chemical vapour deposition reactor / RSC Adv 4(19) : 9564~

[journal] Aberefa O / 2018 / Production of carbon nanotube yarn from swirled floating catalyst chemical vapour deposition : a preliminary study / Adv Nat Sci Nanosci Nanotechnol 9(3) : 35009~

[journal] Abdulkareem AS / 2007 / Synthesis of carbon nanotubes by swirled floating catalyst chemical vapour deposition method / J Nanosci Nanotechnol 7(9) : 3233~

[journal] Barnard JS / 2016 / The role of carbon precursor on carbon nanotube chirality in floating catalyst chemical vapour deposition / Nanoscale 8(39) : 17262~

[journal] Mhlanga SD / 2009 / Synthesis and study of carbon microspheres for use as catalyst support for cobalt / South Afr J Sci 105(7-8) : 304~

[journal] Zhang Q / 2010 / Mass production of aligned carbon nanotube arrays by fluidized bed catalytic chemical vapor deposition / Carbon 48(4) : 1196~

[journal] Hoecker C / 2016 / Catalyst nanoparticle growth dynamics and their influence on product morphology in a CVD process for continuous carbon nanotube synthesis / Carbon 96 : 116~

[journal] Lee SH / 2017 / Synthesis of carbon nanotube fibers from carbon precursors with low decomposition temperatures using a direct spinning process / Carbon 124 : 219~

[journal] Bronikowski MJ / 2001 / Gas-phase production of carbon single-walled nanotubes from carbon monoxide via the HiPco process : a parametric study / J Vac Sci Technol A Vac Surf Films 19(4) : 1800~

[journal] Afolabi AS / 2007 / Synthesis of carbon nanotubes and nanoballs by swirled floating catalyst chemical vapour deposition method / J Exp Nanosci 2(4) : 269~

[journal] Hoecker C / 2017 / The influence of carbon source and catalyst nanoparticles on CVD synthesis of CNT aerogel / Chem Eng J 314 : 388~

[journal] Lee SH / 2016 / Synthesis of carbon nanotube fibers using the direct spinning process based on design of experiment(DOE) / Carbon 100 : 647~

[journal] Paukner C / 2014 / Ultra-pure single wall carbon nanotube fibres continuously spun without promoter / Sci Rep 4 : 3903~

[journal] Hoecker C / 2017 / The dependence of CNT aerogel synthesis on sulfur-driven catalyst nucleation processes and a critical catalyst particle mass concentration / Sci Rep 7(1) : 14519~

[journal] Lee SH / 2015 / Synthesis of high-quality carbon nanotube fibers by controlling the effects of sulfur on the catalyst agglomeration during the direct spinning process / RSC Adv 5(52) : 41894~

[journal] Lamura G / 2007 / High-crystalline single-and doublewalled carbon nanotube mats grown by chemical vapor deposition / J Phys Chem C 111(42) : 15154~

[journal] Kashi MB / 2016 / Synthesis of high-quality single-and double-walled carbon nanotubes on Fe/MgO catalysts / Nanomater Nanotechnol 6 : 38~

[journal] Moon SY / 2018 / Structure transformation by sp2 hydrocarbon assisted carbon nanotube growth / RSC Adv 8(45) : 25815~

[journal] Yardimci AI / 2015 / The effects of catalyst pretreatment, growth atmosphere and temperature on carbon nanotube synthesis using Co–Mo/MgO catalyst / Diamond Relat Mater 60 : 81~
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