An approach towards TiO2 chrysanthemum flowers with tunable properties: influence of reaction time in hydrothermal process

作者:Patil Pallavi B; Mali Sawanta S; Kondalkar Vijay V; Khot Kishorkumar V; Mane Rahul M; Hong Chang K; Patil Pramod S; Kim Jin H; Bhosale Popatrao N*
来源:Journal of Materials Science: Materials in Electronics , 2015, 26(8): 6119-6128.
DOI:10.1007/s10854-015-3191-0

摘要

Rutile TiO2 chrysanthemum flowers were successfully synthesized by simple single step hydrothermal method. A possible formation mechanism based on hydrothermal synthesis was proposed on the basis of time dependent evolution of TiO2 chrysanthemum flowers. A series of TiO2 thin films with different morphologies and photoelectrochemical performance were prepared by varying the reaction time. Reaction time plays an important role in controlling the shape and size of nanorods as building blocks i.e. from orderly arranged TiO2 nanorods to well and completely grown TiO2 chrysanthemum flowers. The synthesized TiO2 chrysanthemum flowers were found to be nanocrystalline and there is formation of single pure phase TiO2 as confirmed by X-ray diffraction. The hierarchical TiO2 chrysanthemum structure endowed the high specific surface area and excellent light scattering property. Thus, this hierarchical architecture based photoanodes produce higher photoconversion efficiency i.e. 1.95 %. The enhanced photoelectrochemical performance can be attributed to improved charge separation by superior charge transportation through crystalline 3D TiO2 chrysanthemum flowers.

  • 出版日期2015-8