Synthesis and properties of carbon nanospheres grown by CVD using Kaolin supported transition metal catalysts

Carbon spheres with diameters between 400 and 2000 nm were synthesized in large quantities by catalytic chemical vapor deposition (CCVD) method using Kaolin supported transition metal salts (M=Fe, Co, Ni, etc.) as catalysts. The reaction conditions for the synthesis of carbon spheres in different si...

Full description

Saved in:
Bibliographic Details
Published inCarbon (New York) Vol. 42; no. 4; pp. 813 - 822
Main Authors Miao, Jian-Ying, Hwang, Dennis W, Narasimhulu, Kuppala V, Lin, Ping-I, Chen, Yit-Tsong, Lin, Sheng-Hsien, Hwang, Lian-Pin
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 2004
Elsevier Science
Subjects
A. Catalytically grown carbon, Vapor grown carbon
B. Catalyst support, Chemical vapor deposition
C. Electron microscopy, Electron spin resonance, Raman spectroscopy
Catalysis
Chemistry
Cross-disciplinary physics: materials science; rheology
D. Magnetic properties
Exact sciences and technology
Fullerenes and related materials; diamonds, graphite
General and physical chemistry
Materials science
Physics
Specific materials
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
C. Electron microscopy, Electron spin resonance, Raman spectroscopy
A. Catalytically grown carbon, Vapor grown carbon
D. Magnetic properties
B. Catalyst support, Chemical vapor deposition
CVD
Heterogeneous catalysis
Synthesis
Transition elements
Catalyst supports
Nanosphere
Carbon
Supported catalyst
Kaolin
Online AccessGet full text

Cover

More Information
Summary:Carbon spheres with diameters between 400 and 2000 nm were synthesized in large quantities by catalytic chemical vapor deposition (CCVD) method using Kaolin supported transition metal salts (M=Fe, Co, Ni, etc.) as catalysts. The reaction conditions for the synthesis of carbon spheres in different sizes are described. The reactivity of the carbon spheres in various organic solvents is discussed. The as-synthesized carbon spheres are composed of unclosed graphene layers with the interlayer distances 0.33–0.35 nm. These carbon spheres have been characterized by SEM, TEM, HRTEM, XRD, Raman, ESR and SQUID magnetization techniques. From the ESR and SQUID the metallic nature of the carbon spheres is described.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2004.01.053