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

Author

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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
    Institute of Environment and Sustainable Development, University Research Center of Ioannina (URCI), University of Ioannina, 45110 Ioannina, Greece)

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.

Suggested Citation

  • Maria Solakidou & Yiannis Georgiou & Yiannis Deligiannakis, 2021. "Double-Nozzle Flame Spray Pyrolysis as a Potent Technology to Engineer Noble Metal-TiO 2 Nanophotocatalysts for Efficient H 2 Production," Energies, MDPI, vol. 14(4), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:817-:d:493230
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    References listed on IDEAS

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    1. Panagiota Stathi & Maria Solakidou & Maria Louloudi & Yiannis Deligiannakis, 2020. "From Homogeneous to Heterogenized Molecular Catalysts for H 2 Production by Formic Acid Dehydrogenation: Mechanistic Aspects, Role of Additives, and Co-Catalysts," Energies, MDPI, vol. 13(3), pages 1-25, February.
    2. Marinos Theodorakopoulos & Maria Solakidou & Yiannis Deligiannakis & Maria Louloudi, 2021. "A Use-Store-Reuse (USR) Concept in Catalytic HCOOH Dehydrogenation: Case-Study of a Ru-Based Catalytic System for Long-Term USR under Ambient O 2," Energies, MDPI, vol. 14(2), pages 1-10, January.
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    Cited by:

    1. Venkatesan, Suriya & Mitzel, Jens & Wegner, Karsten & Costa, Remi & Gazdzicki, Pawel & Friedrich, Kaspar Andreas, 2022. "Nanomaterials and films for polymer electrolyte membrane fuel cells and solid oxide cells by flame spray pyrolysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 158(C).
    2. Pavlos Psathas & Maria Solakidou & Asterios Mantzanis & Yiannis Deligiannakis, 2021. "Flame Spray Pyrolysis Engineering of Nanosized Mullite-Bi 2 Fe 4 O 9 and Perovskite-BiFeO 3 as Highly Efficient Photocatalysts for O 2 Production from H 2 O Splitting," Energies, MDPI, vol. 14(17), pages 1-16, August.

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