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Study on Advanced Nanomaterials Applied in Green Technologies

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Green Materials".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1227

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Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, D. Mangeron, 73, 700050 Iasi, Romania
Interests: new materials synthesis and characterization; photocatalysis; nanomaterials; geopolymers
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Special Issue Information

Dear Colleagues,

The various nanomaterials utilized in applications, such as energy production and storage, environmental protection, construction and building, electronic and optoelectronic, pharmaceuticals, cosmetics, and human health, have all been the subject of extensive scientific research in recent years. These materials attracted a lot of interest from researchers in many different disciplines because of their unique qualities. The physical, chemical, optical, and surface properties of nanoparticles make them useful in the abovementioned fields.

Nanomaterials increase energy and material efficiency, enhance the recyclability of materials, and implicitly minimize environmental impacts.

It is well known that creating novel materials for cutting-edge applications is a significant issue today. In actuality, the issue of new nanomaterials is a very innovative and promising new method, resulting from humanity's need to pay attention to the remediation of water, air, and soil, as well as the production of energy, human health, and medicine, among other things.

The main objective of this Special Issue is to attract more attention to nanomaterials synthesis and its application of it in new and attractively green technologies.

Advanced Nanomaterials Applied in Green Technologies is a Special Issue devoted to the advanced applications of nanomaterials rather than just to nanomaterial synthesis.

For this issue, applications such as those in energy production, batteries, wastewater treatment, photocatalysis, air purification, soil treatment, membranes and adsorbents, glass and ceramics applications, concrete and mortars with nanomaterials, nanomaterials for coating, nano-insulation materials, carbon nanotubes, nano-hydroxyapatites, and nanosensors are taken into consideration, among others.

We kindly invite you to submit your research contribution: research article, communication, or review for this Special Issue.

Dr. Maria Harja
Guest Editor

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Keywords

  • nanomaterials
  • green technologies
  • applications of nanomaterials in new sustainable technology
  • inorganic and organo-metallic nanomaterials
  • composite nanomaterials

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Published Papers (1 paper)

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Research

20 pages, 5338 KiB  
Article
Zinc/Magnesium Ferrite Nanoparticles Functionalized with Silver for Optimized Photocatalytic Removal of Malachite Green
by Ricardo J. C. Fernandes, Beatriz D. Cardoso, Ana Rita O. Rodrigues, Ana Pires, André M. Pereira, João P. Araújo, Luciana Pereira and Paulo J. G. Coutinho
Materials 2024, 17(13), 3158; https://doi.org/10.3390/ma17133158 - 27 Jun 2024
Viewed by 813
Abstract
Water pollution is a major environmental challenge. Due to the inefficiency of conventional wastewater treatment plants in degrading many organic complex compounds, these recalcitrant pollutants end up in rivers, lakes, oceans and other bodies of water, affecting the environment and human health. Semiconductor [...] Read more.
Water pollution is a major environmental challenge. Due to the inefficiency of conventional wastewater treatment plants in degrading many organic complex compounds, these recalcitrant pollutants end up in rivers, lakes, oceans and other bodies of water, affecting the environment and human health. Semiconductor photocatalysis is considered an efficient complement to conventional methods, and the use of various nanomaterials for this purpose has been widely explored, with a particular focus on improving their activity under visible light. This work focuses on developing magnetic and photoactive zinc/magnesium mixed ferrites (Zn0.5Mg0.5Fe2O4) by sol-gel and solvothermal synthesis methods, which are two of the most important and efficient methods used for the synthesis of ferrite nanoparticles. The nanoparticles (NPs) synthesized by the sol-gel method exhibited an average size of 14.7 nm, while those synthesized by the solvothermal method had an average size of 17.4 nm. Both types possessed a predominantly cubic structure and demonstrated superparamagnetic behavior, reaching a magnetization saturation value of 60.2 emu g−1. Due to the high recombination rate of electrons/holes, which is an intrinsic feature of ferrites, surface functionalization with silver was carried out to enhance charge separation. The results demonstrated a strong influence of adsorption and of the deposition of silver. Several optimization steps were performed during synthesis, allowing us to create efficient catalysts, as proved by the almost full removal of the dye malachite green attaining 95.0% (at a rate constant of 0.091 min−1) and 87.6% (at a rate constant of 0.017 min−1) using NPs obtained by the sol-gel and solvothermal methods, respectively. Adsorption in the dark accounted for 89.2% of the dye removal for nanoparticles prepared by sol-gel and 82.8% for the ones obtained by the solvothermal method. These results make mixed zinc/magnesium ferrites highly promising for potential industrial application in effluent photoremediation using visible light. Full article
(This article belongs to the Special Issue Study on Advanced Nanomaterials Applied in Green Technologies)
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