Preparation and Characterization of Electrospun Magnetic Carbon Composite Nanofibres

doi:10.15541/jim20130577

Abstract

Abstract:

Magnetic carbon composite nanofibres, using the mixed homogeneous solution consist of polyacrylonitrile (PAN), ferric acetylacetonate (AAI) and dimetbylformamide (DMF) as raw material, were prepared by electrospinning-calcination technology. TEM analysis showed that the carbon nanofibre diameter of sample CF900 was about 130-210 nm, in which magneticnanoparticles were uniformly distributed. The magnetic properties of carbon composite nanofibres under different carbonization temperature was also investigated. Results showed that saturation magnetization (M_s) and remanent magnetization (M_r) increased with the increase of the temperature. When carbonization temperature was 900 ℃, the sample was of good magnetic property with high saturation magnetization (M_s=27.55 A·m²/kg). Moreover, the specific surface area (S_BET) and total pore volume (V_total) were up to 354.0 m²/g and 0.315 mL/g, respectively.

Key words: electrospinning, carbon composite nanofibres, magnetic nanoparticle, magnetic property

CLC Number:

TQ174

TANG Ying-Mao, MIAO Qing-Qing, XIAO Li-Ren, QIAN Qing-Rong, CHEN Qing-Hua. Preparation and Characterization of Electrospun Magnetic Carbon Composite Nanofibres[J]. Journal of Inorganic Materials, 2014, 29(8): 827-834.

Figures/Tables 11

Fig. 1 DSC-TGA results for (a) PAN/AAI composite nanofiber in the air; (b) composite nanofiber after stabilizing treatment under the nitrogen

Fig. 2 SEM images of as spun PAN/AAI composite nanofiber (a1, a2) and magnetic carbon composite nanofiber of CF900 (b1, b2)

Fig. 3 HRTEM images of magnetic carbon composite nanofiber

Fig. 4 EDS spectrum of magnetic carbon composite nanofiber

Fig. 5 XRD patterns of the samples

Fig. 6 Raman spectra of various samples

Table 1 The R values (R=IG/ID, degree of graphitization) of the carbon fibers and La values (La≈4.4×R) of various nanofibers

Sample	R	L_a/nm
CF500	0.84	3.70
CF600	0.92	4.05
CF700	0.93	4.09
CF800	1.02	4.49
CF900	0.94	4.14

Fig. 7 N2 adsorption-desorption isotherms of (a) CF500; (b) CF600; (c) CF700, CF800; (d) CF900 (Closed symbol: adsorption, open symbol: desorption

Table 2 Surface areas and pore volumes of various magnetic carbon nanofibers

Sample ID	S_BET/(m²·g^-1)	V_total/(mL·g^-1)	D_P/nm	NLDFT
Sample ID	S_BET/(m²·g^-1)	V_total/(mL·g^-1)	D_P/nm	V_t/(mL·g^-1)	V_mic/(mL·g^-1)	V_mes/(mL·g^-1)
CF500	10.0	0.031	12.2	0.030	0.002	0.028
CF600	48.8	0.099	8.15	0.096	0.010	0.086
CF700	351.1	0.317	3.61	0.302	0.110	0.192
CF800	400.1	0.328	3.28	0.308	0.129	0.179
CF900	354.0	0.315	3.56	0.296	0.120	0.176

Fig. 8 Magnetic hysteresis loops of (a) CF500, CF600, CF700 and (b) CF800, CF900

Table 3 Ms, Mr and Hc of magnetic carbon composite nanofibres at 298 K

Sample	M_s/(A·m²·kg^-1)	M_r/(A·m²·kg^-1)	H_c/(kA·m^-1)
CF500	1.02	0.05	7.96
CF600	7.83	0.83	7.96
CF700	16.57	3.53	16.00
CF800	22.87	4.65	19.90
CF900	27.55	5.10	19.90

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