Direct coating of V2O5/TiO2 nanoparticles onto glass beads by chemical vapor deposition
- Direct coating of V2O5/TiO2 nanoparticles onto glass beads by chemical vapor deposition
- 송민영; 박영권; 정종수
- V2O5/TiO2 nanoparticles; CVD; chemical vapor deposition; Single-step preparation; Methylene blue
- Issue Date
- Powder technology
- VOL 231, 135-140
- V2O5/TiO2 nanocomposite particles were synthesized and coated directly onto glass beads by chemical vapor
deposition (CVD). Size-controlled, almost spherical, catalytic particles with agglomerated surface morphologies
were synthesized by controlling the gas flow rate. The CVD-coated glass beads had a more uniform
nanoparticle coating than those prepared using a dip-coating method. The photocatalytic activities of the
coated beads toward the degradation of aqueous methylene blue were tested and the best activity was
exerted by the beads coated at a vanadium precursor gas flow rate of 1.0 L/min. The structures of the coated
beads were examined by scanning electron microscopy, the Brunauer, Emmett and Teller surface area, X-ray
diffraction and X-ray photoelectron spectroscopy. The CVD process was found to be a suitable method for the
single-step preparation of nanocomposite coatings on glass bead supports.
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