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Coatings
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Environmental Coatings on Nano-surfaces and Interfaces
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Environmental Coatings on Nano-surfaces and Interfaces

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 3067

Special Issue Editor

Prof. Dr. Edward P.C. Lai

E-Mail Website
Guest Editor
Department of Chemistry, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
Interests: analytical chemistry; biochemistry, capillary electrophoresis; coatings; colloids; desorption of waterc ontaminants; dynamic light scattering; fluorescence spectroscopy; lecithin liposomes; mass spectrometry; molecular imprinting; nanoparticles; polymers; toxicity
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The scope of this Special Issue covers fundamental aspects ranging from the theory of charged surfaces to how nanoparticles deposit on them to form two- or three- dimensional coatings. Over the last several years, we have witnessed an impressive growth in the production of novel nanostructured coatings on a variety of substrate materials. The enormous demand for technological solutions by major manufacturing industries presents a strong driving force in the search for more advanced nano-coatings. Research and development efforts in the field seem to focus on the discovery of new physical and chemical properties among advanced nanomaterials. One punctilious challenge is the need to make sure that these nano-coatings are environmentally friendly. Specifically, biocompatible polymer coatings can reduce the toxicity of nanoparticles, coating of silver nanoparticles with a biodegradable polymer can prevent toxicity of a metal oxide substrate, and carbon nanotubes can be coated with polydopamine by spontaneous oxidative polymerization. This Special Issue aims to encourage worldwide researchers in sharing their scientific and technological knowledge on new nano-coatings of low toxicity and facile formation. It may include novel synthetic routes for coating substrates with proper biocompatible polymers, strategies for rapid formation of thick polymeric films, and instrumental methods for characterization of their unique physicochemical properties. Special welcome extends to emerging technologies that can be directly applied in very large volumes of environmental water.

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

  • deposition of natural organic matter onto model environmental surface;
  • nanoscale chemical imaging of solid–liquid interfaces;
  • design of biomimetic porous material interfaces at nanoscale;
  • phenotypically heterogeneous microenvironments in biofilms development;
  • formation of covalently bonded imine‐based discrete nanostructures;
  • dissolution of nanoscale silica particles in electrolyte solution;
  • preparation of plasmonic Au/TiO2 nanoparticles with perfect hetero-interface;
  • catalytic processes at functional transition metal oxide–electrolyte interfaces;
  • surface wetting properties of epitaxial rare-earth oxide thin films;
  • dewetting of thin polymeric film to form nanoscale droplets on a substrate;
  • formation of a nanometer-thick lepidocrocite film on pristine calcite surface;
  • nucleation and growth of micro/nano-droplets of ionic liquids on surfaces.

Prof. Dr. Edward P.C. Lai
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (1 paper)

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Research

19 pages, 4082 KiB  
Article
Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite
by Imran Hasan, Akshara Bassi, Khadijah H. Alharbi, Ibtisam I. BinSharfan, Rais Ahmad Khan and Ali Alslame
Coatings 2020, 10(12), 1200; https://doi.org/10.3390/coatings10121200 - 09 Dec 2020
Cited by 23 | Viewed by 2513
Abstract
Statistics show that more than 700 thousand tons of dye are produced annually across the globe. Around 10–20% of this is used in industrial processes such as printing and dyeing, while about 50% of the dye produced is discharged into the environment without [...] Read more.
Statistics show that more than 700 thousand tons of dye are produced annually across the globe. Around 10–20% of this is used in industrial processes such as printing and dyeing, while about 50% of the dye produced is discharged into the environment without proper physicochemical treatment. Even trace amounts of dye in water can reduce oxygen solubility and have carcinogenic, mutagenic, and toxic effects on aquatic organisms. Therefore, before dye-containing wastewater is discharged into the environment, it must be properly treated. The present study investigates the green synthesis of nickel ferrite NiFe2O4 (NIFE) spinel magnetic nanoparticles (MNPs) via chemical coprecipitation of a solution of Ni2+/Fe3+ in the presence of a biopolymer blend of chitosan (CT) and ascorbic acid (AS). The magnetic nanomaterial was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy–energy dispersive X-ray analysis (SEM-EDX), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), differential scanning calorimetry (DSC), and vibrating-sample magnetometry (VSM). The material was further explored as a catalyst for the photocatalytic degradation of malachite green (MG) under visible light irradiation coupled with ultrasonic waves. The combination of 90 min of visible solar light irradiation with 6.35 W·mL−1 ultrasonic power at pH 8 resulted in 99% of the photocatalytic efficiency of chitosan-ascorbic acid@NIFE (CTAS@NIFE) catalyst for 70 mg·L−1 MG. The quenching of the photocatalytic efficiency from 98% to 64% in the presence of isopropyl alcohol (IPA) suggested the involvement of hydroxy (•OH) radicals in the mineralization process of MG. The high regression coefficients (R2) of 0.99 for 35, 55, and 70 mg·L−1 MG indicated the sonophotocatalysis of MG by CTAS@NIFE was best defined by a pseudo first-order kinetic model. The mechanism involves the adsorption of MG on the catalyst surface in the first step and thereby mineralization of the MG by the generated hydroxyl radicals (•OH) under the influence of visible radiation coupled with 6.34 W·mL−1 ultrasonic power. In the present study the application of photodegradation process with sonochemistry results in 99% of MG mineralization without effecting the material structure unlike happens in the case adsorption process. So, the secondary pollution (generally happens in case of adsorption) can be avoided by reusing the spent material for another application instead of disposing it. Thus, the ecofriendly synthesis protocol, ease in design of experimentation like use of solar irradiation instead of electric power lamps, reusability and high efficiency of the material suggested the study to be potentially economical for industrial development at pilot scale towards wastewater remediation. Full article
(This article belongs to the Special Issue Environmental Coatings on Nano-surfaces and Interfaces)
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