Application of Metal (Oxide) Nanomaterials in Photocatalysis

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 956

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Institut de Chimie Physique, UMR 8000 CNRS, Université Paris-Saclay, 91405 Orsay, France
Interests: photocatalysis; mesoporous materials; coating; nanocomposites
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Special Issue Information

Dear Colleagues,

Metal (oxide) nanomaterials have emerged as promising candidates for various applications, with photocatalysis being one of the most significant areas. Photocatalysis, a process that utilizes light energy to initiate chemical reactions, has gained significant attention due to its potential for sustainable energy production and environmental remediation. Metal (oxide) nanomaterials offer unique properties, such as large surface area, tunable bandgap, and enhanced catalytic activity, making them ideal for photocatalytic applications.

In photocatalysis, metal (oxide) nanoparticles play a crucial role as catalysts by absorbing light and generating electron-hole pairs. These charge carriers can participate in redox reactions with target compounds, leading to their degradation or transformation. Metal oxides, such as titanium dioxide (TiO2), zinc oxide (ZnO), Bismuth vanadate (BiVO4), and perovskite (SrTiO3, BaTiO3, LaFeO3), are among the most extensively studied nanomaterials for photocatalysis. These metal (oxide) nanomaterials can effectively harness solar energy and exhibit excellent stability, making them suitable for various applications like water splitting, pollutant degradation, and hydrogen production. The Application of Metal (Oxide) Nanomaterials in Photocatalysis holds great potential for sustainable energy production and environmental remediation. These nanomaterials can efficiently utilize solar energy, exhibit excellent stability, and possess enhanced catalytic activity, making them suitable for various applications like water splitting, pollutant degradation, and air purification. Continued research in this field has the potential to drive advancements in clean energy and contribute to a cleaner and healthier environment.

For this reason, this special issue encourages submissions of research articles and reviews related to Application of Metal (Oxide) Nanomaterials in Photocatalysis.

Dr. Mohamed Nawfal Ghazzal
Guest Editor

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Keywords

  • metal (oxide) nanomaterials
  • photocatalysis
  • photocatalyst
  • titanium dioxide (TiO2)
  • zinc oxide (ZnO)
  • iron oxide (Fe2O3)
  • Bismuth vanadate (BiVO4)
  • degradation
  • water splitting
  • pollutant degradation
  • hydrogen production

Published Papers (1 paper)

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Research

34 pages, 25645 KiB  
Article
Biocompatible PANI-Encapsulated Chemically Modified Nano-TiO2 Particles for Visible-Light Photocatalytic Applications
by Nefeli Papadopoulou-Fermeli, Nefeli Lagopati, Maria-Anna Gatou and Evangelia A. Pavlatou
Nanomaterials 2024, 14(7), 642; https://doi.org/10.3390/nano14070642 - 7 Apr 2024
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Abstract
Polyaniline (PANI) constitutes a very propitious conductive polymer utilized in several biomedical, as well as environmental applications, including tissue engineering, catalysis, and photocatalysis, due to its unique properties. In this study, nano-PANI/N-TiO2 and nano-PANI/Ag-TiO2 photocatalytic composites were fabricated via aniline’s oxidative [...] Read more.
Polyaniline (PANI) constitutes a very propitious conductive polymer utilized in several biomedical, as well as environmental applications, including tissue engineering, catalysis, and photocatalysis, due to its unique properties. In this study, nano-PANI/N-TiO2 and nano-PANI/Ag-TiO2 photocatalytic composites were fabricated via aniline’s oxidative polymerization, while the Ag-and N-chemically modified TiO2 nanopowders were synthesized through the sol–gel approach. All produced materials were fully characterized. Through micro-Raman and FT-IR analysis, the co-existence of PANI and chemically modified TiO2 particles was confirmed, while via XRD analysis the composites’ average crystallite size was determined as ≈20 nm. The semi-crystal structure of polyaniline exhibits higher photocatalytic efficiency compared to that of other less crystalline forms. The spherical-shaped developed materials are innovative, stable (zeta potential in the range from −26 to −37 mV), and cost-effective, characterized by enhanced photocatalytic efficiency under visible light (energy band gaps ≈ 2 eV), and synthesized with relatively simple methods, with the possibility of recycling and reusing them in potential future applications in industry, in wastewater treatment as well as in biomedicine. Thus, the PANI-encapsulated Ag and N chemically modified TiO2 nanocomposites exhibit high degradation efficiency towards Rhodamine B dye upon visible-light irradiation, presenting simultaneously high biocompatibility in different normal cell lines. Full article
(This article belongs to the Special Issue Application of Metal (Oxide) Nanomaterials in Photocatalysis)
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