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State-of-the-Art Nanomaterials in Energy and Environmental Applications
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State-of-the-Art Nanomaterials in Energy and Environmental Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 3806

Special Issue Editors

Dr. Govindasamy Palanisamy

E-Mail Website
Guest Editor
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea
Interests: wastewater treatment; recycling; nanomaterials; biofilm; drug delivery; quantum dots
Dr. Sivaprakash Paramasivam

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Keimyung University, Daegu 42601, Republic of Korea
Interests: nanomaterials; catalysis; energy storage; alloys; shock waves on materials

Special Issue Information

Dear Colleagues,

Advanced nanomaterials are transforming applications, enhancing material performance, and meeting the rising demands of supercapacitors and wastewater treatment. Nano-additives and nanostructured frameworks offer unique solutions. Recent advancements in nanotechnology have opened new possibilities in energy storage and environmental preservation. Nanomaterials like nanofibers, nanoparticles, nanoplates, and nanorods are revolutionizing supercapacitors and wastewater treatment. Their uses range from boosting energy storage to efficient wastewater management. The fusion of synthetic biology and materials science has produced Engineering Living Materials (ELMs), with the potential to revolutionize energy production, therapeutics, disease management, pollutant monitoring, and bioremediation. Research must focus on high-performance polymers and composites for supercapacitors and wastewater treatment. Our Special Issue highlights the latest breakthroughs in nanostructured materials, focusing on their use in these areas. Topics include tissue scaffolds, drug delivery, regenerative medicine, filtration, and environmental toxicology. Integrating nanostructures and innovative nanomaterials for energy and wastewater challenges is pivotal. We believe this Special Issue will offer innovative solutions to meet the growing demands in these crucial fields.

We encourage the publication of articles related to the aforementioned topics.=

Dr. Govindasamy Palanisamy
Dr. Sivaprakash Paramasivam
Guest Editors

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. Materials 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
  • engineering living materials
  • wastewater treatment
  • supercapacitors
  • environmental remediation
  • biofilm
  • energy storage
  • environmental preservation
  • biomedical applications
  • drug delivery solutions

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Published Papers (3 papers)

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Research

11 pages, 3688 KiB  
Article
Structural Color of Partially Deacetylated Chitin Nanowhisker Film Inspired by Jewel Beetle
by Dagmawi Abebe Zewude, Masaaki Akamatsu and Shinsuke Ifuku
Materials 2024, 17(21), 5357; https://doi.org/10.3390/ma17215357 - 1 Nov 2024
Viewed by 534
Abstract
Nanochitin was developed to effectively utilize crab shells, a food waste product, and there is ongoing research into its applications. Short nanowhiskers were produced by sonicating partially deacetylated nanochitin in water, resulting in a significant decrease in viscosity due to reduced entanglement of [...] Read more.
Nanochitin was developed to effectively utilize crab shells, a food waste product, and there is ongoing research into its applications. Short nanowhiskers were produced by sonicating partially deacetylated nanochitin in water, resulting in a significant decrease in viscosity due to reduced entanglement of the nanowhiskers. These nanowhiskers self-assembled into a multilayered film through an evaporation technique. The macro- and nanoscale structures within the film manipulate light, producing vibrant and durable structural colors. The dried cast film exhibited green and purple stripes extending from the center to the edge formed by interference effects from the multilayer structure and thickness variations. Preserving structural colors requires maintaining a low ionic strength in the dispersion, as a higher ionic strength reduces electrostatic repulsion between nanofibers, increasing viscosity and potentially leading to the fading of color. This material’s sensitivity to environmental changes, combined with chitin’s biocompatibility, makes it well-suited for food sensors, wherein it can visually indicate freshness or spoilage. Furthermore, chitin’s stable and non-toxic properties offer a sustainable alternative to traditional dyes in cosmetics, delivering vivid and long-lasting color. Full article
(This article belongs to the Special Issue State-of-the-Art Nanomaterials in Energy and Environmental Applications)
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22 pages, 13445 KiB  
Article
A High-Performance Supercapacitor Based on Hierarchical Template-Free Ni/SnO2 Nanostructures via Hydrothermal Method
by Abdul Samad Shameem, Anbazhagan Murugan, Vadivel Siva, Govindasamy Palanisamy, Ikhyun Kim, Jintae Lee and Sivaprakash Paramasivam
Materials 2024, 17(8), 1894; https://doi.org/10.3390/ma17081894 - 19 Apr 2024
Cited by 1 | Viewed by 1084
Abstract
Novel flake-like Ni1−xSnxO2 particles were successfully prepared by template-free hydrothermal synthesis. The prepared samples were investigated for their properties by different characterization techniques. Scanning micrographs showed that the obtained particles consisted of nanoflakes. The X-ray diffraction results of [...] Read more.
Novel flake-like Ni1−xSnxO2 particles were successfully prepared by template-free hydrothermal synthesis. The prepared samples were investigated for their properties by different characterization techniques. Scanning micrographs showed that the obtained particles consisted of nanoflakes. The X-ray diffraction results of the Ni1−xSnxO2 revealed the formation of mixed-phase Ni/SnO2 having the typical tetragonal structure of SnO2, and the cubic structure of Ni in a nanocrystalline nature. The doping with Ni had a certain influence on the host’s lattice structure of SnO2 at different doping concentrations. Confirmation of the functional groups and the elements in the nanomaterials was accomplished using FTIR and EDS analyses. The electrochemical performance analysis of the prepared nanomaterials were carried out with the help of the CV, GCD, and EIS techniques. The specific capacitance of the synthesized nanomaterials with different concentrations of Ni dopant in SnO2 was analyzed at different scanning rates. Interestingly, a 5% Ni-doped SnO2 nanocomposite exhibited a maximum specific capacitance of 841.85 F g−1 at 5 mV s−1 in a 6 M KOH electrolyte. Further, to boost the electrochemical performance, a redox additive electrolyte was utilized, which exhibited a maximum specific capacitance of 2130.33 at 5 mV s−1 and an excellent capacitance retention of 93.22% after 10,000 GCD cycles. These excellent electrochemical characteristics suggest that the Ni/SnO2 nanocomposite could be utilized as an electrode material for high-performance supercapacitors. Full article
(This article belongs to the Special Issue State-of-the-Art Nanomaterials in Energy and Environmental Applications)
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14 pages, 5786 KiB  
Article
Nitrogen- and Sulfur-Codoped Strong Green Fluorescent Carbon Dots for the Highly Specific Quantification of Quercetin in Food Samples
by Kandasamy Sasikumar, Ramar Rajamanikandan and Heongkyu Ju
Materials 2023, 16(24), 7686; https://doi.org/10.3390/ma16247686 - 17 Dec 2023
Cited by 8 | Viewed by 1554
Abstract
Carbon dots (CDs) doped with heteroatoms have garnered significant interest due to their chemically modifiable luminescence properties. Herein, nitrogen- and sulfur-codoped carbon dots (NS-CDs) were successfully prepared using p-phenylenediamine and thioacetamide via a facile process. The as-developed NS-CDs had high photostability against photobleaching, [...] Read more.
Carbon dots (CDs) doped with heteroatoms have garnered significant interest due to their chemically modifiable luminescence properties. Herein, nitrogen- and sulfur-codoped carbon dots (NS-CDs) were successfully prepared using p-phenylenediamine and thioacetamide via a facile process. The as-developed NS-CDs had high photostability against photobleaching, good water dispersibility, and excitation-independent spectral emission properties due to the abundant amino and sulfur functional groups on their surface. The wine-red-colored NS-CDs exhibited strong green emission with a large Stokes shift of up to 125 nm upon the excitation wavelength of 375 nm, with a high quantum yield (QY) of 28%. The novel NS-CDs revealed excellent sensitivity for quercetin (QT) detection via the fluorescence quenching effect, with a low detection limit of 17.3 nM within the linear range of 0–29.7 μM. The fluorescence was quenched only when QT was brought near the NS-CDs. This QT-induced quenching occurred through the strong inner filter effect (IFE) and the complex bound state formed between the ground-state QT and excited-state NS-CDs. The quenching-based detection strategies also demonstrated good specificity for QT over various interferents (phenols, biomolecules, amino acids, metal ions, and flavonoids). Moreover, this approach could be effectively applied to the quantitative detection of QT (with good sensing recovery) in real food samples such as red wine and onion samples. The present work, consequently, suggests that NS-CDs may open the door to the sensitive and specific detection of QT in food samples in a cost-effective and straightforward manner. Full article
(This article belongs to the Special Issue State-of-the-Art Nanomaterials in Energy and Environmental Applications)
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