Synthesis and photocatalytic activity of TiO2 nanoparticles prepared by chemical vapor condensation method with different precursor concentration and residence time
- Synthesis and photocatalytic activity of TiO2 nanoparticles prepared by chemical vapor condensation method with different precursor concentration and residence time
- 진성민; 박은석; 김민수; 배귀남; 정종수
- Chemical vapor condensation; TiO2 nanoparticle; Anatase; Crystallinity; Photocatalyst
- Issue Date
- Journal of colloid and interface science
- VOL 362, NO 2, 470-476
- Nanosized TiO2 photocatalysts were synthesized using a chemical vapor condensation method under a
range of synthesis conditions (precursor vapor concentration and residence time in a tubular electric furnace).
X-ray diffraction showed that the prepared TiO2 powders consisted mainly of anatase (>94%) with
a small amount of rutile. The mean particle diameter from the Brunauer–Emmett–Teller surface area and
transmission electron microscopy measurements ranged from 9.4 to 16.6 nm. The specific surface area
(92.5–163.5 ㎡g-1) of the prepared TiO2 powders was found to be dependent on the synthesis conditions.
The content of hydroxyl groups on the surface of the prepared TiO2 sample was higher than those
on commercial TiO2, resulting in increased photocatalytic oxidation. The photocatalytic activity of the
TiO2 samples prepared in a methylene blue solution was strongly dependent on the crystallinity and specific
surface area, which were affected by the TTIP vapor concentration and residence time.
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