ZnO-Based Nanocomposite Thin Films: Achievements and Applications

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (15 June 2021) | Viewed by 7860

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Guest Editor
Unité de Recherche Matériaux & Ingénierie Mécanique, Université de Reims Champagne-Ardenne, CEDEX 2, 51687 Reims, France
Interests: applied/experimental physics; thin films; optoelectronics; semiconductor device physics; materials characterization; elaboration techniques
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Special Issue Information

Dear Colleagues,

The contemporary challenge for research is to develop environment-friendly materials which have a good performance in the various applications of interest to humanity, particularly in the fields of health and sustainable development (renewable energy, purifying air and water, sterilization, food preservation, medicinal products, etc.).

In this area, zinc oxide (ZnO), in the form of thin layers or nanostructures, has aroused particular interest because of its many well-known properties. It is nontoxic, biocompatible, physically and chemically stable, and relatively simple to synthesize at low costs. It has interesting optoelectronic properties, in particular, a wide bandgap and a high exciton energy, which gives it a great sensitivity to excitations. These plasmonic, photocatalytic, piezoelectric, antimicrobial, and biocompatibility properties have made it one of the most promising materials in a wide range of applications, such as photovoltaic cells, light-emitting diodes, gas sensors, air and water decontamination systems, active packaging, vaccine adjuvants, etc.

Recent advances in nano-engineering technologies allow the generation of ZnO-based nanocomposites, using ZnO as a matrix or as nanostructures embedded in a dielectric medium, have increased the interest in this material and provided new perspectives.

This Special Issue is devoted to the properties of thin layers of ZnO-based nanocomposites, developed by different techniques and intended for these numerous fields of application.

In particular, the topics of interest include but are not limited to:

  • Photocatalytic properties;
  • Gas detection;
  • Photovoltaic conversion;
  • Plasmonic applications;
  • Antibacterial activity and biomedical applications;
  • Functional textile and polymer coatings;
  • Active packaging

Dr. Aomar Hadjadj
Guest Editor

Manuscript Submission Information

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Published Papers (2 papers)

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15 pages, 4084 KiB  
Article
Synthesis of Zinc Oxide Nanomaterials via Sol-Gel Process with Anti-Corrosive Effect for Cu, Al and Zn Metallic Substrates
by Raluca Somoghi, Violeta Purcar, Elvira Alexandrescu, Ioana Catalina Gifu, Claudia Mihaela Ninciuleanu, Cosmin Mihai Cotrut, Florin Oancea and Hermine Stroescu
Coatings 2021, 11(4), 444; https://doi.org/10.3390/coatings11040444 - 13 Apr 2021
Cited by 20 | Viewed by 4377
Abstract
Nanosized zinc oxide (ZnO) particles modified with different silane coupling agents (octyltriethoxysilane (OTES), octadecyltriethoxysilane (ODTES) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS)) were synthesized in basic catalysis using the sol-gel method. The structure and morphology were characterized by dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM) [...] Read more.
Nanosized zinc oxide (ZnO) particles modified with different silane coupling agents (octyltriethoxysilane (OTES), octadecyltriethoxysilane (ODTES) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS)) were synthesized in basic catalysis using the sol-gel method. The structure and morphology were characterized by dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM) and Fourier transform infrared spectroscopy (FTIR) for bonding characteristics. The final hybrid materials were deposited on three types of metallic substrates (aluminum (Al), copper (Cu) and zinc (Zn)) in order to obtain coatings with ultrahydrophobic and anti-corrosion properties. Water wettability was studied revealing a contact angle of 145° for the surface covered with ZnO material modified with ODTES. The water contact angle increased with the length of the alkyl chain supplied by the silica precursor. The anti-corrosive behavior of ZnO/silane coupling agents particles deposited on metallic substrates was studied by the linear polarization technique in neutral medium. Full article
(This article belongs to the Special Issue ZnO-Based Nanocomposite Thin Films: Achievements and Applications)
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15 pages, 6251 KiB  
Article
Effects of Ag Nanoparticles on Zinc Oxide Photocatalytic Performance
by Mouna Khiari, Mickaël Gilliot, Michaël Lejeune, Florica Lazar and Aomar Hadjadj
Coatings 2021, 11(4), 400; https://doi.org/10.3390/coatings11040400 (registering DOI) - 31 Mar 2021
Cited by 16 | Viewed by 2736
Abstract
We used a sol–gel spin coating technique to synthesize nanocomposite thin films based on zinc oxide (ZnO) loaded with silver nanoparticles (NPs). We tested these ZnO/Ag NPs photocatalysts, with a thickness of about 100 nm, for the photodegradation of the indigo carmine dye [...] Read more.
We used a sol–gel spin coating technique to synthesize nanocomposite thin films based on zinc oxide (ZnO) loaded with silver nanoparticles (NPs). We tested these ZnO/Ag NPs photocatalysts, with a thickness of about 100 nm, for the photodegradation of the indigo carmine dye solution. The study focused on the effects of Ag NPs on the ZnO matrix as well as the impact of their concentration on the photocatalytic performance of the nanocomposite. The study also highlighted the high stability of the photocatalytic performance of these nanocomposites. This work is a contribution in the search for non-toxic thin film photocatalysts that is usable under solar radiation for the treatment of contaminated wastewater. Innovation in the field of heterogeneous photocatalysis requires the use of solar resource with efficient results in terms of photocatalytic performance. Full article
(This article belongs to the Special Issue ZnO-Based Nanocomposite Thin Films: Achievements and Applications)
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