| 總結: | Noble metal-TiO<sub>2</sub> nanohybrids, NM<sup>0</sup>-TiO<sub>2</sub>, (NM<sup>0</sup> = Pt<sup>0</sup>, Pd<sup>0</sup>, Au<sup>0</sup>, Ag<sup>0</sup>) have been engineered by One-Nozzle Flame Spray Pyrolysis (ON-FSP) and Double-Nozzle Flame Spray Pyrolysis (DN-FSP), by controlling the method of noble metal deposition to the TiO<sub>2</sub> matrix. A comparative screening of the two FSP methods was realized, using the NM<sup>0</sup>-TiO<sub>2</sub> photocatalysts for H<sub>2</sub> production from H<sub>2</sub>O/methanol. The results show that the DN-FSP process allows engineering of more efficient NM<sup>0</sup>-TiO<sub>2</sub> nanophotocatalysts. This is attributed to the better surface-dispersion and narrower size-distribution of the noble metal onto the TiO<sub>2</sub> matrix. In addition, DN-FSP process promoted the formation of intraband states in NM<sup>0</sup>-TiO<sub>2</sub>, lowering the band-gap of the nanophotocatalysts. Thus, the present study demonstrates that DN-FSP process is a highly efficient technology for fine engineering of photocatalysts, which adds up to the inherent scalability of Flame Spray Pyrolysis towards industrial-scale production of nanophotocatalysts.
|
|---|
