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Novel synthesis of medium surface area SiC and their photoluminescence property

YINGJIE LI1, JIANYING HAO1,* , XIANJUN LI2, YINGYONG WANG3

Affiliation

  1. Taiyuan University of Science and Technology, Taiyuan, 030024, PR China
  2. Shanxi University, Taiyuan 0300 13 , PR Chin a
  3. Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001, PR China

Abstract

SiC nanoparticles and nanofibers were prepared by simple carbothermal reduction technology. Low-cost water glass and phenolic resin were respectively used as silicon source and carbon source, and cobalt nitrate was added as additive. The synthesized samples were characterized by XRD, FESEM and N2 adsorption-desorption isotherms. The results show that cobalt catalyst can change the morphology and the surface area of SiC. When molar ratio of cobalt to silicon equal to 0.0025, SiC nanoparticles with average diameter of 30 nm are synthesized and the surface area reach maximum value, 65 m2g-1. However SiC nanofibers are synthesized with the increase of cobalt content, but the surface area decreases. The synthetic technique has the advantages of simple, efficient and economical. Strong photoluminescence peaks located around 450 nm and 468 nm are observed at room temperature, which can be ascribed to quantum size effects, micro structures and defects within the SiC materials..

Keywords

Medium surface area SiC, Carbothermal reduction, Nanoparticles, Nanofibers, Photoluminescence.

Citation

YINGJIE LI, JIANYING HAO, XIANJUN LI, YINGYONG WANG, Novel synthesis of medium surface area SiC and their photoluminescence property, Optoelectronics and Advanced Materials - Rapid Communications, 11, 7-8, July-August 2017, pp.472-476 (2017).

Submitted at: Jan. 20, 2016

Accepted at: Aug. 9, 2017