Double-Nozzle Flame Spray Pyrolysis as a Potent Technology to Engineer Noble Metal-TiO 2 Nanophotocatalysts for Efficient H 2 Production

Maria Solakidou, Yiannis Georgiou and Yiannis Deligiannakis
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Maria Solakidou: Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
Yiannis Georgiou: Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
Yiannis Deligiannakis: Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece

Energies, 2021, vol. 14, issue 4, 1-16

Abstract: Noble metal-TiO 2 nanohybrids, NM 0 -TiO 2 , (NM 0 = Pt 0 , Pd 0 , Au 0 , Ag 0 ) 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 2 matrix. A comparative screening of the two FSP methods was realized, using the NM 0 -TiO 2 photocatalysts for H 2 production from H 2 O/methanol. The results show that the DN-FSP process allows engineering of more efficient NM 0 -TiO 2 nanophotocatalysts. This is attributed to the better surface-dispersion and narrower size-distribution of the noble metal onto the TiO 2 matrix. In addition, DN-FSP process promoted the formation of intraband states in NM 0 -TiO 2 , 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.

Keywords: flame spray pyrolysis; double-nozzle FSP; noble metal/TiO 2 nanoparticles; H 2 production; water splitting (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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