Synthesis of cobalt boride nanoparticles using RF thermal plasma

被引：34

作者：

Choi, Sooseok ^{[1
]}

Lapitan, Lorico D. S., Jr. ^{[2
]}

Cheng, Yingying ^{[1
]}

Watanabe, Takayuki ^{[3
]}

机构：

[1] Tokyo Inst Technol, Dept Environm Chem & Engn, Yokohama, Kanagawa 227, Japan

[2] Univ Santo Tomas, Fac Engn, Dept Chem Engn, Manila, Philippines

[3] Kyushu Univ, Dept Chem Engn, Fukuoka 8190395, Japan

来源：

ADVANCED POWDER TECHNOLOGY | 2014年 / 25卷 / 01期

基金：

日本学术振兴会;

关键词：

Cobalt boride nanoparticles; Crystallographic structure; X-ray diffraction; Nucleation; Scanning electron microscopy; SODIUM-BOROHYDRIDE; HYDROLYSIS; HYDROGEN; OXIDES;

D O I：

10.1016/j.apt.2013.06.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Nanosize cobalt boride particles were synthesized from the vapor phase using a 30 kW-4 MHz radio frequency (RF) thermal plasma. Cobalt and boron powder mixtures used as precursors in different composition and feed rate were evaporated immediately in the high temperature plasma and cobalt boride nanoparticles were produced through the quenching process. The X-ray diffractornetry (XRD) patterns of cobalt boride nanoparticles prepared from the feed powder ratio of 1:2 and 1:3 for Co:B showed peaks that are associated with the Co2B and COB crystal phases of cobalt boride. The XRD analysis revealed that increasing the powder feed rate results in a higher mass fraction and a larger crystalline diameter of cobalt boride nanoparticles. The images obtained by field emission scanning electron microscopy (FESEM) revealed that cobalt boride nanoparticles have a spherical morphology. The crystallite size of the particles estimated with XRD was found to be 18-22 nm. (C) 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：365 / 371

页数：7

共 25 条

[1] Controlled self-assembly of colloidal cobalt nanocrystals [J].

Bao, YP ;

Beerman, M ;

Krishnan, KM .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2003, 266 (03) :L245-L249

[2] Formation mechanism of titanium boride nanoparticles by RF induction thermal plasma [J].

Cheng, Yingying ;

Shigeta, Masaya ;

Choi, Sooseok ;

Watanabe, Takayuki .

CHEMICAL ENGINEERING JOURNAL, 2012, 183 :483-491

[3] Synthesis of Titanium Boride Nanoparticles by Induction Thermal Plasmas [J].

Cheng, Yingying ;

Watanabe, Takayuki .

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 2011, 44 (08) :583-589

[4]

Cullity B. D., 1978, ELEMENTS XRAY DIFFRA

[5] KINETIC NUCLEATION THEORY - A NEW EXPRESSION FOR THE RATE OF HOMOGENEOUS NUCLEATION FROM AN IDEAL SUPERSATURATED VAPOR [J].

GIRSHICK, SL ;

CHIU, CP .

JOURNAL OF CHEMICAL PHYSICS, 1990, 93 (02) :1273-1277

[6] Controlling nanostructure in thermal plasma processing: Moving from highly aggregated porous structure to spherical silica nanoparticles [J].

Goortani, Behnam Mostajeran ;

Proulx, Pierre ;

Xue, Siwen ;

Mendoza-Gonzalez, Norma Y. .

POWDER TECHNOLOGY, 2007, 175 (01) :22-32

[7]

Ibe T.W. T., 2004, Trans Mater Res Soc Jpn, V29, P3407

[8] Catalytic hydrolysis of sodium borohydride by a novel nickel-cobalt-boride catalyst [J].

Ingersoll, J. C. ;

Mani, N. ;

Thenmozhiyal, J. C. ;

Muthaiah, A. .

JOURNAL OF POWER SOURCES, 2007, 173 (01) :450-457

[9] Magnetovolume effect of Co2B [J].

Kanomata, T ;

Ise, Y ;

Kumagai, N ;

Haga, A ;

Kamishima, K ;

Goto, T ;

Kimura, HM ;

Yoshida, H ;

Kaneko, T ;

Inoue, A .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 259 (1-2) :L1-L4

[10] Cobalt oxides as Co2B catalyst precursors for the hydrolysis of sodium borohydride solutions to generate hydrogen for PEM fuel cells [J].

Krishnan, Palanichamy ;

Advani, Suresh G. ;

Prasad, Ajay K. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (23) :7095-7102

← 1 2 3 →