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Nanomaterials for Sustainable Energy and Environmental Applications

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: 5 May 2026 | Viewed by 527

Special Issue Editor


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Guest Editor
Center for Optics, Photonics and Lasers (COPL), Laval University, Quebec City, QC G1V 0A6, Canada
Interests: nanomaterials; spectroscopy; photocatalysis

Special Issue Information

Dear Colleagues,

The global demand for energy is rising rapidly due to industrialization, urbanization, and population growth. Simultaneously, environmental challenges such as climate change, pollution, and resource depletion threaten ecosystems and human health. To address these issues, sustainable energy and environmental solutions are essential for ensuring a cleaner, greener, and more resilient future.

Nanomaterials have emerged as transformative materials in addressing global challenges related to energy sustainability and environmental protection. Due to their unique properties, such as high surface area, quantum size effects, tuneable electronic structures, and superior catalytic activity, nanomaterials offer groundbreaking solutions in renewable energy generation, energy storage, and environmental remediation.

This Special Issue aims to highlight recent advances in nanomaterials and their transformative impact on clean energy and environmental sustainability. We welcome original research articles, reviews, and short communications on topics including but not limited to the following:

  • Nanomaterials for energy storage and conversion: batteries, supercapacitors, fuel cells, hydrogen production, etc.
  • Nanostructured materials for solar energy applications.
  • Photocatalysis and electrocatalysis for hydrogen fuel production.
  • Nanomaterials for photocatalytic environmental remediation: water purification, air filtration, pollutant degradation, etc.

Advanced characterization techniques for nanomaterials in energy and environmental applications.

Dr. Joy Sankar Roy
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 250 words) can be sent to the Editorial Office for assessment.

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. Energies is an international peer-reviewed open access semimonthly 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.

Keywords

  • nanomaterials
  • renewable energy
  • energy storage
  • energy conversion
  • solar energy
  • photocatalysis
  • electrocatalysis
  • environmental remediation
  • water treatment

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Published Papers (1 paper)

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Research

26 pages, 4125 KB  
Article
Frequency–Temperature Characteristics of the Cellulose—Insulating Oil–Water Nanodroplet Nanocomposite Components for Diagnostic Evaluation of Power Transformer Insulation
by Pawel Zukowski, Konrad Kierczynski, Przemyslaw Rogalski, Pawel Okal, Pawel Molenda, Marek Szrot and Rafal Pajak
Energies 2025, 18(23), 6176; https://doi.org/10.3390/en18236176 - 25 Nov 2025
Viewed by 329
Abstract
We determined the reference characteristics of the loss tangent and the real component of the complex permittivity of the cellulose-insulating oil–water nanodroplet nanocomposite with a moisture content of 5.17% by weight in pressboard. Such a high moisture content was selected because a value [...] Read more.
We determined the reference characteristics of the loss tangent and the real component of the complex permittivity of the cellulose-insulating oil–water nanodroplet nanocomposite with a moisture content of 5.17% by weight in pressboard. Such a high moisture content was selected because a value close to 5% by weight is critical, and reaching it may lead to catastrophic transformer failure as well as contamination of the natural environment with poorly biodegradable mineral oil and products of its incomplete combustion. Based on the measurement results, the values of the loss tangent and the real and imaginary components of the complex permittivity of the power transformer insulation system, consisting of moistened pressboard and insulating oil, were determined according to CIGRE. These values were obtained for both factory-new and moistened mineral oil. It was found that oil moisture content has a significant impact on the tanδ characteristics of strongly moistened liquid–solid insulation in the lowest frequency range. In the intermediate frequency range, this effect gradually decreases and then practically disappears. In the frequency range above 50 Hz, the tanδ values depend on the moisture content in cellulose and on the geometrical parameters of the insulation components in the CIGRE system, and do not depend on the oil moisture content. The influence of oil moisture on the estimation of cellulose moisture content becomes noticeable starting from a water content of 2% in pressboard. This should be taken into account in insulation condition analysis and in moisture level estimation in order to detect a critical state threatening catastrophic failure of a power transformer. It was also determined that the real component of the complex permittivity depends only weakly on oil moisture, and only in the low-temperature and low-frequency ranges. In contrast, the imaginary component of the complex permittivity depends on oil moisture practically in the same way as the loss tangent of the power transformer insulation system. Full article
(This article belongs to the Special Issue Nanomaterials for Sustainable Energy and Environmental Applications)
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