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Nanomaterials Catalysis for Hydrogen Production and Water Splitting

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: closed (20 October 2021) | Viewed by 5926

Special Issue Editor


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Guest Editor
Lab of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, 45110 Ioannina, Greece
Interests: nanoparticles’ physics (photosemiconductors, plasmonics, magnetic, H-coupled e-transfer); advanced electron paramagnetic resonance (EPR) spectroscopy; nanomaterials synthesis by flame spray pyrolysis (FSP); catalysis using nanomaterials (H2 production, water splitting, photocatalsysis); environmental technology using nanohybrids; natural organic matter physical chemistry; solid-solution interface physical chemistry
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Special Issue Information

Dear Colleagues,

The key idea is to try to attract articles which will provide new insights into materials in regards to structure synthesis performance as well as on production cost-efficiency/scalability and photoreactor design. Areas of interest include, but are not limited to, the following topics:

  • Hybrid TiO2-based materials for photocatalytic water splitting: mechanisms, materials, and limitations.
  • Beyond TiO2: the current state-of-the-art developments in non-TiO2 photocatalysts, addressing fundamental issues
  • Rational designing of visible light photocatalysts for efficient photocatalytic water splitting
  • Nanoplasmonic interphases for efficient H2 evolution
  • Non-precious metal cocatalysts for water splitting photocatalysis
  • Multi-phase homojunctions-heterojuctions for efficient photocatalytic water splitting
  • Methods of synthesis of 2D and 3D nanomaterials for photocatalytic water splitting: addressing performance, cost-efficiency, scalable production
  • Solar pilot plant scale development for photocatalytic water splitting
  • Theoretical computational modeling studies of photocatalytic water splitting process
  • Recent developments in the designing of water splitting photo reactors

You may choose our Joint Special Issue in Nanoenergy Advances.

Prof. Dr. Yiannis Deligiannakis
Guest Editor

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Published Papers (2 papers)

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16 pages, 3686 KiB  
Article
Flame Spray Pyrolysis Engineering of Nanosized Mullite-Bi2Fe4O9 and Perovskite-BiFeO3 as Highly Efficient Photocatalysts for O2 Production from H2O Splitting
by Pavlos Psathas, Maria Solakidou, Asterios Mantzanis and Yiannis Deligiannakis
Energies 2021, 14(17), 5235; https://0-doi-org.brum.beds.ac.uk/10.3390/en14175235 - 24 Aug 2021
Cited by 12 | Viewed by 2916
Abstract
Bi-Fe oxides are stable materials with potential photocatalytic activity under solar light photons. So far, however the photocatalytic potential of pure-phase nanosized mullite-Bi2Fe4O9 has not been studied. Usually, synthesis of pure-phase nanosized mullite-Bi2Fe4O9 [...] Read more.
Bi-Fe oxides are stable materials with potential photocatalytic activity under solar light photons. So far, however the photocatalytic potential of pure-phase nanosized mullite-Bi2Fe4O9 has not been studied. Usually, synthesis of pure-phase nanosized mullite-Bi2Fe4O9 is hampered by co-formation with perovskite BiFeO3. Herein we demonstrate that pure-phase mullite-Bi2Fe4O9 nanoparticles prepared by Flame Spray Pyrolysis (FSP) technology are highly efficient O2 production photocatalysts, achieving >1500 μmol g−1h−1. This outperforms all -so far reported- O2 production Bi-Fe-O photocatalysts. We present an FSP-based process for production of a versatile Bi-Fe-O platform, that can be easily optimized to obtain 100% mullite-Bi2Fe4O9 or 100% perovskite-BiFeO3 or their heterojunctions. The phase-evolution of the Bi-Fe-O materials has been studied by XPS, Raman, and EPR spectroscopies. Short post-FSP annealing process impacts the photoactivity of the BiFeO3 and Bi2Fe4O9 in distinct ways. Fe2+ centers in BiFeO3 can improve dramatically its O2 production efficiency, while solid-melt formation in Bi2Fe4O9 is a limiting factor. Full article
(This article belongs to the Special Issue Nanomaterials Catalysis for Hydrogen Production and Water Splitting)
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16 pages, 6432 KiB  
Article
Double-Nozzle Flame Spray Pyrolysis as a Potent Technology to Engineer Noble Metal-TiO2 Nanophotocatalysts for Efficient H2 Production
by Maria Solakidou, Yiannis Georgiou and Yiannis Deligiannakis
Energies 2021, 14(4), 817; https://0-doi-org.brum.beds.ac.uk/10.3390/en14040817 - 04 Feb 2021
Cited by 12 | Viewed by 2378
Abstract
Noble metal-TiO2 nanohybrids, NM0-TiO2, (NM0 = Pt0, Pd0, Au0, Ag0) have been engineered by One-Nozzle Flame Spray Pyrolysis (ON-FSP) and Double-Nozzle Flame Spray Pyrolysis (DN-FSP), by controlling the method [...] Read more.
Noble metal-TiO2 nanohybrids, NM0-TiO2, (NM0 = Pt0, Pd0, Au0, Ag0) 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 TiO2 matrix. A comparative screening of the two FSP methods was realized, using the NM0-TiO2 photocatalysts for H2 production from H2O/methanol. The results show that the DN-FSP process allows engineering of more efficient NM0-TiO2 nanophotocatalysts. This is attributed to the better surface-dispersion and narrower size-distribution of the noble metal onto the TiO2 matrix. In addition, DN-FSP process promoted the formation of intraband states in NM0-TiO2, 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. Full article
(This article belongs to the Special Issue Nanomaterials Catalysis for Hydrogen Production and Water Splitting)
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