Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (05): 655-658.doi: 10.3866/PKU.WHXB20070507

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Shape-controlled Synthesis and Formation Mechanism of Co3O4 by Solvothermal Method

HUANG Ke-Long; LIU Ren-Sheng; YANG You-Ping; LIU Su-Qin; WANG Li-Ping   

  1. College of Chemistry&Chemical Engineering, Central South University, Changsha 410083, P. R. China
  • Received:2006-09-05 Revised:2006-11-02 Published:2007-04-28
  • Contact: HUANG Ke-Long E-mail:klhuang@mail.csu.edu.cn

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Abstract: Pure spinel Co3O4 was successfully synthesized by solvothermal method with polyethylene glycol as dispersant. The shape and size of the final product can be controlled by adjusting the solvent ratio of n-butanol to water. The interimproduct was characterized by IR, X-ray powder diffraction (XRD), TG-DTA, and transmission electron microscope (TEM). The results showed that the formation mechanism of Co3O4 included two steps: Co (OH)2-x·(NO3)x formed in solution was oxidated into Co0.81IICo0.19III(OH)2.11·(NO3)0.08·0.43H2O firstly, and then transformed to Co3O4.

Key words: Solvothermal synthesis, Co3O4, Formation mechanism, Morphology control