| 초록 |
TiO2 nanoparticles were synthesized and coated directly onto glass beads by chemical vapor deposition (CVD). The amount of coating was controlled using the coating time, size-controlled, almost spherical and catalytic particles with agglomerated surface morphologies were synthesized by controlling the gas flow rate. The structures of the coated beads were examined by SEM, BET, XRD and XPS. The CVD technique was compared with the dip coating method using the commercial catalyst, P25-TiO2 or V2O5/TiO2. The CVD-coated glass beads had a more uniform nanoparticle coating than those prepared using a dip-coating method. Additionally, the catalytic activity was investigated using the CVD-coated beads as the photocatalyst in the decomposition of acetaldehyde and methylene blue. The CVD process was found to be a suitable method for the single-step preparation of nanoparticle coatings on glass bead supports. |
