Journal of Inorganic Materials ›› 2014, Vol. 29 ›› Issue (8): 891-896.DOI: 10.15541/jim20140114

• Orginal Article • Previous Articles    

Hydrothermal Synthesis of Flower-like Hierarchical TiO2 Microspheres from Titanium Sulfate and Hexafluorosilicic Acid

SHI Guo-Dong, SONG Jun, YANG Liu-Liu, ZHANG Li-Xiong   

  1. (State Key Laboratory of Materials-oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China)
  • Received:2013-03-11 Online:2014-08-20 Published:2014-07-15
  • About author:SHI Guo-Dong (1989–), male, candidate of M.D. E-mail:dd735270004@163.com

Abstract:

Flower-like hierarchical TiO2 microspheres assembled by nanosheets with exposed {001} facets were prepared through a cost-effective hydrothermal synthesis method, using cheap Ti(SO4)2 as the feedstock and hexafluorosilicic acid as the capping agent. These hierarchical microspheres were assembled by numerous and cross-linked nanosheets. The fine structure of hierarchical microspheres could be easily controlled by adjusting the concentration of hexafluorosilicic ions. The growth process of the microspheres was examined through XRD and SEM characterizations, and a possible formation mechanism was proposed. Compared with other solvothermal synthesis methods, this cost-effective hydrothermal synthesis route is attractive and can be potentially applied in the production of flower-like TiO2 hierarchical microspheres in large scale. The as-prepared flower-like TiO2 hierarchical microspheres exhibit good photocatalytic ability to degrade methyl orange dye.

Key words: flower-like, hydrothermal synthesis, crystal growth, hierarchical structure

CLC Number: