Characterization of H2Ti4O9 with high specific surface area prepared by a delamination/reassembling process

Jinshu Wang, Shu Yin, Tsugio Sato

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20 Citations (Scopus)

Abstract

H2Ti4O9 nanocrystals with high specific surface areas were prepared by delamination and reassembly process through a way of ball milling combined with ion exchange reaction. The samples were characterized by X-ray powder diffraction, transmission electron microscopy, chemical analysis, thermal analysis, N2 adsorption-desorption isotherm, and absorption spectrum. The crystallites of Ti4O 92- in the form of titania nanosheets has lateral size less than 50 nm. The specific surface area of H2Ti4O 9 nanocrystals depends on pH value of reassembling solution and ball milling time. H2Ti4O9 nanocrystals prepared by ball-milling of K2Ti4O9 for 2 h and suspending in 1 M HCl followed by precipitation at pH 8 had the specific surface area of 328.4 m2 g-1 which was about 16 times larger than the fibrous H2Ti4O9 prepared by treating original K2Ti4O9 without ball-milling in 1 M HCl.

Original languageEnglish
Pages (from-to)53-58
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume126
Issue number1
DOIs
Publication statusPublished - 2006 Jan 15

Keywords

  • Ball-milling
  • HTiO
  • Ion exchange
  • Nanosheet
  • Specific surface area

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