Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor

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	Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor; Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor
	Q. F. Liu; W. C. Ren; F. Li; H. T. Cong; H. M. Cheng
	2007 ; 2007
发表期刊	Journal of Physical Chemistry C ; Journal of Physical Chemistry C
ISSN	1932-7447 ; 1932-7447
卷号	111 期号:13 页码:5006-5013
摘要	Nickel formate dihydrate is demonstrated to be an effective catalyst precursor for selectively synthesizing double-walled carbon nanotubes (DWNTs) with high thermal stability by using a hydrogen arc discharge technique. High-resolution transmission electron microscopy (HRTEM) observations show that the as-synthesized DWNTs are of high quality with good structural integrity and narrow diameter distribution (1.98-3.47 nm and 1.32-2.81 nm, respectively, for the outer and inner diameter). Thermogravimetric analysis (TGA) in air indicates that the DWNTs have excellent oxidation resistance up to similar to 800 degrees C, approaching to that of graphitized multiwalled carbon nanotubes and higher than that of DWNTs prepared by other routes or methods. Moreover, Raman analysis and HRTEM observations reveal that these DWNTs can keep good structural stability and other carbon species are removed after oxidation at 650 degrees C in air flow. The formation of DWNTs with high thermal stability is attributed to the cleaning effect of active radicals such as hydrogen and oxygen originated from the decomposition of nickel formate dihydrate and the in situ defect-healing effect induced by high arc current in the arc growth process. This approach opens various application possibilities for DWNTs with high thermal stability to be used in high-temperature composites, nanoelectronic devices, and electron filed emitters operating at high currents, etc.; Nickel formate dihydrate is demonstrated to be an effective catalyst precursor for selectively synthesizing double-walled carbon nanotubes (DWNTs) with high thermal stability by using a hydrogen arc discharge technique. High-resolution transmission electron microscopy (HRTEM) observations show that the as-synthesized DWNTs are of high quality with good structural integrity and narrow diameter distribution (1.98-3.47 nm and 1.32-2.81 nm, respectively, for the outer and inner diameter). Thermogravimetric analysis (TGA) in air indicates that the DWNTs have excellent oxidation resistance up to similar to 800 degrees C, approaching to that of graphitized multiwalled carbon nanotubes and higher than that of DWNTs prepared by other routes or methods. Moreover, Raman analysis and HRTEM observations reveal that these DWNTs can keep good structural stability and other carbon species are removed after oxidation at 650 degrees C in air flow. The formation of DWNTs with high thermal stability is attributed to the cleaning effect of active radicals such as hydrogen and oxygen originated from the decomposition of nickel formate dihydrate and the in situ defect-healing effect induced by high arc current in the arc growth process. This approach opens various application possibilities for DWNTs with high thermal stability to be used in high-temperature composites, nanoelectronic devices, and electron filed emitters operating at high currents, etc.
部门归属	chinese acad sci, inst med res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, inst med res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn ; chinese acad sci, inst med res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, inst med res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn
关键词	Chemical-vapor-deposition Chemical-vapor-deposition Hydrogen-arc-discharge Hydrogen-arc-discharge Thermogravimetric Thermogravimetric Analysis Analysis Efficient Synthesis Efficient Synthesis Raman-scattering Raman-scattering Growth Growth Purification Purification Cvd Cvd
URL	查看原文 ; 查看原文
WOS记录号	WOS:000245260700013 ; WOS:000245260700013
引用统计	被引频次：52[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33716
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. F. Liu,W. C. Ren,F. Li,et al. Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor, Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor[J]. Journal of Physical Chemistry C, Journal of Physical Chemistry C,2007, 2007,111, 111(13):5006-5013, 5006-5013.
APA	Q. F. Liu,W. C. Ren,F. Li,H. T. Cong,&H. M. Cheng.(2007).Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor.Journal of Physical Chemistry C,111(13),5006-5013.
MLA	Q. F. Liu,et al."Synthesis and high thermal stability of double-walled carbon nanotubes using nickel formate dihydrate as catalyst precursor".Journal of Physical Chemistry C 111.13(2007):5006-5013.