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 language | English |
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Pages (from-to) | 746-748 |
Number of pages | 3 |
Journal | Journal of Crystal Growth |
Volume | 311 |
Issue number | 3 |
DOIs | |
Publication status | Published - 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