A facile approach for synthesis and in situ modification of onion-like carbon with molybdenum carbide

✍ Scribed by Du, Jianping ;Zhao, Ruihua ;Zhu, Zhenping

• Book ID: 105366311
• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 354 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201026646

✦ Synopsis

Abstract

Uniform small onion‐like carbon (OLC) modified with molybdenum carbide has been synthesized by a one‐step process, using detonation‐assisted chemical vapor deposition. The obtained material was characterized by transmission electron microscope, energy‐dispersive X‐ray spectroscopy, Raman spectroscopy, and X‐ray diffraction. The results show that the OLC have almost perfect onion structures containing about 7–10 closed shells and exhibit a narrow distribution of 4–6 nm when the C/Mo ratio is about 150. The hexagonal molybdenum carbide (Mo~2~C) is dispersed on the surface of OLC. The size of OLC can be controlled by adjusting the C/Mo ratios. The formation mechanism of the nanocomposites of OLC and Mo~2~C is briefly discussed.