Preparation of TiO2 hollow spheres for DSSC photoanodes

Chang Yu Liao, Shih Ting Wang, Fang Chih Chang, Hong-Paul Wang, Hong-Ping Lin

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14 Citations (Scopus)

Abstract

High crystallinity mesoporous TiO2 hollow spheres (MHS-TiO 2) were prepared using the mesoporous carbon hollow sphere template. The MHS-TiO2 contains mainly nanostructured anatase. The mesopore of the MHS-TiO2 has a pore opening in the range of 400-600 nm. The refined extended X-ray absorption fine structure spectra indicate that the MHS-TiO2 possesses less the 1st-shell Ti-O coordination numbers than the nano-TiO2. More surface active species (A2 ((Ti=O)O4)) on the MHS-TiO2 are also observed by the component fitted X-ray absorption near edge structure spectroscopy. The MHS-TiO2 photoanode has a better DSSC conversion efficiency than the nano-TiO2 one by at least 40%. Note that the N3 dye molecules are accessible to the mesopores of the MHS-TiO2, and the loading time for N3 can be reduced by at least 70% if compared with those of the nano-TiO 2.

Original languageEnglish
Pages (from-to)38-41
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume75
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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