Direct coating of V2O5/TiO2 nanoparticles onto glass beads by chemical vapor deposition
2012; Elsevier BV; Volume: 231; Linguagem: Inglês
10.1016/j.powtec.2012.07.043
ISSN1873-328X
AutoresMin Young Song, Young‐Kwon Park, Jongsoo Jurng,
Tópico(s)Catalytic Processes in Materials Science
ResumoV2O5/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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