Synthesis of Uniform Te@Carbon-Rich Composite Nanocables with Photoluminescence Properties and Carbonaceous Nanofibers by the Hydrothermal Carbonization of Glucose

Hai-Sheng Qian, Shu-Hong Yu,* Lin-Bao Luo, Jun-Yan Gong, Lin-Feng Fei, and Xian-Ming Liu
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Structural Research Laboratory of CAS, Department of Chemistry, the School of Chemistry and Materials, University of Science and Technology of China, Hefei 230026, P. R. China
Chem. Mater., 2006, 18 (8), pp 2102–2108
DOI: 10.1021/cm052848y
Publication Date (Web): March 22, 2006
Copyright © 2006 American Chemical Society
*

 To whom correspondence should be addressed. Fax:  86 551 3603040. E-mail:  shyu@ustc.edu.cn.

Abstract

Abstract Image

A hydrothermal carbonization route has been designed for the syntheses of uniform core−shell Te@carbon-rich composite nanocables with ultrathin and ultralong Te nanowires as the core component and carbonaceous matter with remarkable reactivity as the shell, using ultralong Te nanowires of several nanometers in diameter and glucose as starting materials. The results demonstrated that the presence of uniform Te nanowires can effectively restrain the usual homogeneous nucleation of carbon spheres from the bulk solution and instead promote the heterogeneous deposition of carbonaceous matter on the backbone of Te nanowires for the formation of well-defined Te@carbon-rich composite nanocables. The diameter of the Te@carbon-rich composite nanocables could be controlled by adjusting the hydrothermal carbonization reaction time or the ratio of the tellurium and glucose, and the shell thickness of the core−shell nanocables can be varied from 2 to 25 nm. Simply removing the Te nanowire core can produce well-defined ultralong and functionalized carbonaceous nanofibers. As-prepared Te@carbon-rich composite nanocables display a strong photoluminescence in the blue-violet region. These well-defined nanocables/nanofibers can be well dispersed in water or ethanol solution and are of high reactivity, making it possible to further engineer their surfaces or produce new hybrid materials with potential applications.

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History

  • Published In Issue April 18, 2006
  • Received December 25, 2005
    Revised Manuscript Received February 21, 2006

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