CVD Synthesis of Multi-Walled Carbon Nanotubes onto Different Catalysts at Low Temperature

Guiqiang Diao; Hao Li; Hao Liang; Iryna Ivanenko; Tetiana Dontsova; Ihor Astrelin

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자료유형: 학술저널

저자정보: Guiqiang Diao (Huizhou University) Hao Li (Huizhou University) Hao Liang (Huizhou University) Iryna Ivanenko (National Technical University of Ukraine) Tetiana Dontsova (National Technical University of Ukraine) Ihor Astrelin (National Technical University of Ukraine)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.13 No.4

발행연도: 2018.1

수록면: 22 - 32 (11page)

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Multi-walled carbon nanotubes (MWCNTs) were synthesized onto a series of individual and bimetallic catalysts by the chemical vapor deposition (CVD) of acetylene at low temperature (600 ℃). The catalysts were prepared by two methods, i.e., precipitation and sol–gel, with two different carriers – MgO and Al2O3. The catalysts were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermal gravimetric (TG) analysis, low-temperature adsorption of nitrogen. The yield of the MWCNTs was calculated in two ways, while the highest yield of 800% was achieved onto the two-component NiO/Co2O3/MgO catalyst, SEM and transmission electron microscopy (TEM) results confirm that uniform tube-like structure MWCNTs with the yield of 410% were obtained onto Co2O3/Al2O3 catalyst. These MWCNTs are smooth and pointing in the same direction. Their tube diameter is about 20nm, which is the smallest around all observed MWCNTs. Moreover, nonuniform curved bamboo-like MWCNTs with nozzles in the yield of 760% were obtained onto NiO/V2O3/MgO catalyst. Their diameter ranges from 25 nm to 50 nm. Results show that single-component catalyst promotes the growth of uniform and smaller nanotubes. Among the as-grown nanotubes, their specific surface area increases and average pores diameter reduces after the treatment with concentrated nitric acid at reflux and washing condition. The largest specific surface area (305m2/g) and average pores diameter (26m2/g) are processed to MWCNTs grown onto the NiO/Co2O3/MgO catalyst. MWCNTs with such large structural adsorption characteristics and purity of more than 99% obtained with yield 800% show potential use for preparation of nanocomposites as anode materials in lithium ion batteries.

참고문헌 (37)

참고문헌 신청

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Meng Lan / 2014 / Synthesis of multi-walled carbon nanotubes over tungsten-doped cobalt-based catalyst derived from a layered double hydroxide precursor / Journal of Industrial and Engineering Chemistry 20(4):1523~1531

H. Ghorbani / 2011 / Mater. Res. Bull.

U. P. M. Ashik / 2017 / Renew. Sustain. Energy Rev.

J. Wang / 2017 / Low-dim. Syst. Nanostr.

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