Thermoelectric oxide NaCo2O4 nanofibers fabricated by electrospinning

被引：89

作者：

Maensiri, Santi ^{[1
]}

Nuansing, Wiwat ^{[1
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2006年 / 99卷 / 01期

关键词：

nanofiber; electrospinning; Raman spectroscopy and scattering; electron microscopy; CARBON NANOFIBERS; ELECTRON-DIFFRACTION; POLYMER NANOFIBERS; RAMAN-SCATTERING; NAXCOO2; GROWTH; NANOTUBES;

D O I：

10.1016/j.matchemphys.2005.10.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For the first time, sodium cobalt oxide (NaCo2O4) nanofibers with diameter of similar to 20-200nm were prepared by electrospinning a precursor mixture of sodium acetate/cobalt acetate/PAN, followed by calcination treatment of the electrospun composite nanofibers. The sodium cobalt oxide nanofibers were characterized by TG-DTA, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The NaCo2O4 nanotibers calcined at 300 and 400 degrees C were polycrystalline of gamma-NaCo2O4 phase having diameters of similar to 20-60 nm with grain sizes of similar to 5-10 nm, and whereas the nanofibers calcined at 800 degrees C were single crystal having linked particles or crystallites with particle sizes of similar to 60-200 nm. The results indicated a significant effect of calcination temperature on the crystalline phase and morphology of the nanofibers. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：104 / 108

页数：5

共 35 条

[21] THE ONE PHONON RAMAN-SPECTRUM IN MICROCRYSTALLINE SILICON [J].

RICHTER, H ;

WANG, ZP ;

LEY, L .

SOLID STATE COMMUNICATIONS, 1981, 39 (05) :625-629

[22]

Rowe D.M.E., 1995, CRC HDB THERMOELECTR, V1st, DOI DOI 10.1201/9781420049718

[23] Thermal conductivity of the thermoelectric layered cobalt oxides measured by the Harman method [J].

Satake, A ;

Tanaka, H ;

Ohkawa, T ;

Fujii, T ;

Terasaki, I .

JOURNAL OF APPLIED PHYSICS, 2004, 96 (01) :931-933

[24] Raman spectroscopy study of NaxCoO2 and superconducting NaxCoO2•yH2O -: art. no. 052502 [J].

Shi, YG ;

Liu, YL ;

Yang, HX ;

Nie, CJ ;

Jin, R ;

Li, JQ .

PHYSICAL REVIEW B, 2004, 70 (05) :052502-1

[25] Thermoelectric properties of sinter-forged NaCo2O4 [J].

Shin, W ;

Izu, N ;

Matsubara, I ;

Murayama, N .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2003, 42 (11) :7013-7017

[26] Thermoelectric properties of highly textured NaCo2O4 ceramics processed by the reactive templated grain growth (RTGG) method [J].

Tajima, S ;

Tani, T ;

Isobe, S ;

Koumoto, K .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2001, 86 (01) :20-25

[27] Characterization of sodium cobalt oxides related to P3-phase superconductor [J].

Takada, K ;

Osada, M ;

Izumi, F ;

Sakurai, H ;

Takayama-Muromachi, E ;

Sasaki, T .

CHEMISTRY OF MATERIALS, 2005, 17 (08) :2034-2040

[28] Large thermoelectric power in NaCo2O4 single crystals [J].

Terasaki, I ;

Sasago, Y ;

Uchinokura, K .

PHYSICAL REVIEW B, 1997, 56 (20) :12685-12687

[29]

TERASAKI I, 2000, P 18 INT C THERM ICT, P569

[30] Vanadium pentoxide nanofibers by electrospinning [J].

Viswanathamurthi, P ;

Bhattarai, N ;

Kim, HY ;

Lee, DR .

SCRIPTA MATERIALIA, 2003, 49 (06) :577-581

← 1 2 3 4 →