Simões Dos Reis, Glaydson

Subramaniyam, Chandrasekar M.

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Citation: Reis, G.S.d.; Subramaniyam,C.M. Nanostructured and FunctionalNanomaterials for Energy Storageand Removal of Pollutants.Nanomaterials 2023, 13, 2631. https://doi.org/10.3390/nano13192631Received: 4 September 2023Accepted: 22 September 2023Published: 24 September 2023Copyright: © 2023 by the authors.Licensee MDPI, Basel, Switzerland.This article is an open access articledistributed under the terms andconditions of the Creative CommonsAttribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).nanomaterialsEditorialNanostructured and Functional Nanomaterials for EnergyStorage and Removal of PollutantsGlaydson Simões dos Reis 1,* and Chandrasekar M. Subramaniyam 21 Department of Forest Biomaterials and Technology, Biomass Technology Centre, Swedish University ofAgricultural Sciences, SE-901 83 Umeå, Sweden2 Department of Chemistry and Biochemistry, Faculty of Pharmacy, Universidad San Pablo-CEU, CEUUniversities, Boadilla del Monte, 28668 Madrid, Spain; mayandi@ceu.es* Correspondence: glaydson.simoes.dos.reis@slu.seNanomaterials have a long history, and people have utilized them unknowingly.Nanomaterials can be characterized as particles existing in nature or artificially synthetizedmaterials with one or more external dimensions in the 1–100 nm range and are mostlymade up and or composed of carbon, silicon, metal and their oxides, etc. [1]. The challengefor researchers working in the field of nanomaterials is the ability to work at these levels togenerate larger structures with fundamentally new atomic, molecular, or particle organiza-tion [1]. These structures can be suitable for a wide range of applications according to theirmolecular, structural and surface properties [1,2]. Nanostructured materials may possessimportant properties such as a high specific surface area and a large number of functionalgroups on their surfaces, and new mechanical, electronic, magnetic, and adsorptive proper-ties, as well as catalytic activity. All of these properties have great potential to revolutionizeseveral fields, including energy storage and water decontamination [2,3]. The prospects fortheir application are very diverse, mainly due to their different physicochemical character-istics, making them very suitable for the aforementioned applications (not limited) in areassuch as energy storage (electrodes for supercapacitors and batteries) and environmentalapplications (water decontamination).Nanostructured material properties can be easily modified/tailored as desired viadifferent synthesis methods, which precisely control their size, shape, synthesis conditions,and appropriate surface functionalization. Two main synthesis approaches are employedfor the preparation of nanostructured materials [4]. One so-called top-down approach con-sists of various methodologies, including mechanical milling, electrospinning, sputtering,laser ablation methods, etc. [4]. The second approach (bottom-up) includes chemical vapordeposition, thermochemical methods, sol–gel, etc. [4]. It is worthwhile to highlight that thecharacteristics of these nanostructured materials are severely dependent on the synthesismethods used to manufacture them; therefore, full knowledge of them is very important inorder to obtain materials with desired properties for suitable/specific applications.The present Special Issue contains eight papers [5–12] devoted to the synthesis andapplication of nanostructured materials for water decontamination through adsorption,photocatalysis and filtration and the building of high energy density energy storage de-vices. The papers present different nanostructured materials such as Doped biomass-activated carbon materials, Titanate Perovskite-Based Nanocomposites, composites basedon Graphene Oxide/TiO2, Nano-Clay, Three–Dimensional Na3V2(PO4)3/Carbon Frame-works, and Nanostructured ZnO.These nanomaterials have been applied in the decontamination of polluted syntheticwaters, including the adsorption of dyes [6,7], the filtration of heavy metals [6], adsorptioncoupled with ultrafiltration to remove nitrite ions [8], and the removal of dyes and organiccontaminants using photocatalysis [9,10] to the degradation of dyes and pharmaceuticals,along with heavy metal ion and radioactive ion extraction.Nanomaterials 2023, 13, 2631. https://doi.org/10.3390/nano13192631 https://www.mdpi.com/journal/nanomaterialsNanomaterials 2023, 13, 2631 2 of 3Regarding the employment of these nanostructured materials for energy storageapplications, this Special Issue contains two contributions on the synthesis and applicationof three-dimensional (3D) Na3V2(PO4)3/holey-carbon frameworks as cathodes for sodium-ion batteries [11] and a review paper on biomass-derived carbon materials for potassiumand aluminum batteries [12].The construction of next-generation technological processes is impossible withoutusing an improvised material base, so nanostructured and functional materials are ofgreater importance to go beyond our societal needs. The prospects for their application arevery diverse, mainly due to their different and adaptable physicochemical characteristics,which are pretty much needed in all technological areas, including energy storage devicesand environmental applications (water decontamination), but not only limited to these.Overall, this Special Issue may contribute to the field of interest concerning the greensynthesis of nanostructured materials for environmental and energy storage applications,providing our readership with relevant information on some of the latest prospects in thesefast-evolving and cross-disciplinary areas.Acknowledgments: As guest editors, we would like to express sincere gratitude to all authors con-tributing to this thematic issue and the reviewers for their constructive advice for the improvement ofthe submission’s quality. I deeply acknowledge the Nanomaterials reviewers for enhancing the qual-ity and impact of all submitted papers. Finally, we sincerely thank Katherine Bian, Section ManagingEditor, and the editorial staff of Nanomaterials for their stunning support during the developmentand publication of the Special Issue. Finally, dos Reis thanks Bio4Energy—a Strategic ResearchEnvironment appointed by the Swedish government, and the Swedish University of AgriculturalSciences for the support.Conflicts of Interest: The authors declare no conflict of interest.References1. Anu Mary Ealia, S.; Saravanakumar, M.P. A review on the classification, characterisation, synthesis of nanoparticles and theirapplication. IOP Conf. Ser. Mater. Sci. Eng. 2017, 263, 032019. [CrossRef]2. Zou, H.; Luo, Z.; Yang, X.; Xie, Q.; Zhou, Y. Toward emerging applications using core–shell nanostructured materials: A review. J.Mater. Sci. 2022, 57, 10912–10942. [CrossRef]3. Dos Reis, G.S.; Lima, E.C.; Sampaio, C.H.; Rodembusch, F.S.; Petter, C.O.; Cazacliu, B.G.; Dotto, G.L.; Hidalgo, G.E.N. Novelkaolin/polysiloxane based organic-inorganic hybrid materials: Sol−gel synthesis, characterization, and photocatalytic proper-ties.J. Solid State Chem. 2018, 260, 106–116. [CrossRef]4. Baig, N.; Kammakakam, I.; Falath, W. Nanomaterials: A review of synthesis methods, properties, recent progress, and challenges.Mater. Adv. 2021, 2, 1821–1871. [CrossRef]5. Ekman, S.; Reis, G.S.d.; Laisné, E.; Thivet, J.; Grimm, A.; Lima, E.C.; Naushad, M.; Dotto, G.L. Synthesis, Characterization, andAdsorption Properties of Nitrogen-Doped Nanoporous Biochar: Efficient Removal of Reactive Orange 16 Dye and ColorfulEffluents. Nanomaterials 2023, 13, 2045. [CrossRef] [PubMed]6. Misawa, N.; Yasui, K.; Sakai, K.; Kobayashi, T.; Nagahama, H.; Haraguchi, T.; Sasaki, S.; Torrung, V.; Luangtongkum, T.; Taniguchi,T.; et al. Fine Particle Adsorption Capacity of Volcanic Soil from Southern Kyushu, Japan. Nanomaterials 2023, 13, 568. [CrossRef][PubMed]7. Basso Peressut, A.; Cristiani, C.; Dotelli, G.; Dotti, A.; Latorrata, S.; Bahamonde, A.; Gascó, A.; Hermosilla, D.; Balzarotti,R. Reduced Graphene Oxide/Waste-Derived TiO2 Composite Membranes: Preliminary Study of a New Material for HybridWastewater Treatment. Nanomaterials 2023, 13, 1043. [CrossRef] [PubMed]8. Cojocaru, C.; Pascariu, P.; Enache, A.-C.; Bargan, A.; Samoila, P. Application of Surface-Modified Nanoclay in a Hybrid Adsorption-Ultrafiltration Process for Enhanced Nitrite Ions Removal: Chemometric Approach vs. Machine Learning. Nanomaterials 2023, 13,697. [CrossRef] [PubMed]9. Tiron, V.; Ciolan, M.A.; Bulai, G.; Mihalache, G.; Lipsa, F.D.; Jijie, R. Efficient Removal of Methylene Blue and Ciprofloxacinfrom Aqueous Solution Using Flower-like, Nanostructured ZnO Coating under UV Irradiation. Nanomaterials 2022, 12, 2193.[CrossRef] [PubMed]10. Patra, R.; Dash, P.; Panda, P.K.; Yang, P.-C. A Breakthrough in Photocatalytic Wastewater Treatment: The Incredible Potential ofg-C3N4/Titanate Perovskite-Based Nanocomposites. Nanomaterials 2023, 13, 2173. [CrossRef] [PubMed]Nanomaterials 2023, 13, 2631 3 of 311. Zhao, L.; Liu, X.; Li, J.; Diao, X.; Zhang, J. One–Step Synthesis of Three–Dimensional Na3V2(PO4)3/Carbon Frameworks asPromising Sodium–Ion Battery Cathode. Nanomaterials 2023, 13, 446. [CrossRef] [PubMed]12. Reis, G.S.D.; Petnikota, S.; Subramaniyam, C.M.; de Oliveira, H.P.; Larsson, S.; Thyrel, M.; Lassi, U.; García Alvarado, F.Sustainable Biomass-Derived Carbon Electrodes for Potassium and Aluminum Batteries: Conceptualizing the Key Parameters forImproved Performance. Nanomaterials 2023, 13, 765. [CrossRef] [PubMed]Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individualauthor(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury topeople or property resulting from any ideas, methods, instructions or products referred to in the content.

Nanostructured and Functional Nanomaterials for Energy Storage and Removal of Pollutants

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Nanostructured and Functional Nanomaterials for Energy Storage and Removal of Pollutants

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