Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (9): 906-910.DOI: 10.3724/SP.J.1077.2010.00906

• Research Paper • Previous Articles     Next Articles

Effect of Heating Rate on the Morphology of Nano Titanium Dioxide

LIU Bo1, KONG Wei1, YE Bo1, YU Zhong-Ping1, WANG Hua2, QIAN Guo-Dong1, WANG Zhi-Yu1   

  1. (1. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; 2. Center of Analysis and Measurement Zhejiang University, Hangzhou 310029, China)
  • Received:2009-12-21 Revised:2010-03-05 Published:2010-09-20 Online:2010-08-25
  • Supported by:

    Nature Science Foundation of Zhejiang Province(Z4080021); National Nature Science Foundation of China(50532030,50625206)

Abstract:

Different shapes of nano titanium dioxide including sphere, rod and irregular-shaped polyhedron were prepared by solvothermal process at heating rates of 240℃/10min, 90℃/10min, 40℃/10min and 20℃/10min using tetrabutyl titanate as Ti source, oleic acid as solvent, dodecylamine as auxiliary agent. TEM, HRTEM and XRD were adopted to characterize the phase composition morphology and phase structure of the final products. The   micro-morphology and growth mechanisms of the titanium dioxide nanocrystals prepared at different heating rates were studied based on the TEM, HRTEM and XRD analyses.The results show that spherical, rod-like, and irregular polyhedral points of titanium dioxide nanocrystals could be synthesized by strictly controlling the heating rate. The growth rate of along the (001) direction of nanocrystal shows a first upward and then downward trend with the decline of the heating rate.

Key words: nano titanium dioxide, morphology change, heating rate, solvothermal synthesis

CLC Number: