Hydrothermal routes to prepare nanocrystalline mesoporous SnO2 having high thermal stability

Shinobu Fujihara, Takahiro Maeda, Hirotoshi Ohgi, Eiji Hosono, Hiroaki Imai, Sae Hoon Kim

Research output: Contribution to journalArticle

168 Citations (Scopus)

Abstract

We report simple hydrothermal routes to prepare thermally stable SnO 2 particles having high specific surface areas and mesoporosity. The preparation method includes a new combination of synthetic processes: hydrolysis of tin(IV) chloride at 95°C in the absence of alkaline solutions (aqueous NH3 or NaOH), formation of nanocrystalline SnO2, and subsequent hydrothermal treatments at temperatures between 100 and 200°C. After annealing treatments of the hydrothermally treated SnO 2 particles at 400 or 500°C, their crystallite sizes remained smaller than 7.7 nm and their specific surface areas were still higher than 110 m2/g, indicative of the high thermal stability against particle growth and sintering. Furthermore, mesoporosity evolved with a relatively narrow pore size distribution typically in the range of 3.0-4.3 nm. The effects of the hydrothermal treatment were explained by uniformization of the particle size that was beneficial to the suppression of particle growth.

Original languageEnglish
Pages (from-to)6476-6481
Number of pages6
JournalLangmuir
Volume20
Issue number15
DOIs
Publication statusPublished - 2004 Jul 20

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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