Preparation and photocatalytic properties of strontium titanate powders via sol-gel process

Liang Chen, Shouchen Zhang, Liqiu Wang, Dongfeng Xue, Shu Yin

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38 Citations (Scopus)

Abstract

On the basis of our previous work, we developed a new type of catalyst (e.g. photocatalysts) to degradate nitrogen oxides (NOx). Recently, a series of photocatalysts such as strontium titanate (SrTiO3) were prepared by sol-gel method, their photocatalytic activities of NO degradation were also studied. The obtained samples were characterized by differential thermal analysis and thermal gravimetric analysis, X-ray diffraction and transmission electron microscopy. The as-prepared photocatalysts have a perfect perovskite structure, and pure samples can be obtained when the corresponding sol-gel precursors were calcined at 600 °C in muffle. With the temperature increasing, the grain size of SrTiO3 samples grew large steadily and the crystallinity became better. The optimal synthesis of SrTiO3 was determined to be 700 °C calcination. Our current experiments indicated that some parameters such as lamp-house, calcinations temperature had a strong effect on the designed photoreaction, the concentration of nitric oxide at 716 mg/m3, the degradation rate of nitric oxide can increase above 92%.

Original languageEnglish
Pages (from-to)746-748
Number of pages3
JournalJournal of Crystal Growth
Volume311
Issue number3
DOIs
Publication statusPublished - 2009 Jan 15

Keywords

  • A2. Sol-gel method
  • B1. Nitric monoxide elimination
  • B1. SrTiO
  • B3. Photocatalysis

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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