Nano Trends最新文献

{"title":"Electrochemical studies on chromium doped SrTiO3 for supercapacitor applications","authors":"D.K. Sharma ,&nbsp;S. Sain ,&nbsp;G. Maity ,&nbsp;A. Thomas ,&nbsp;R. Kumar ,&nbsp;S. Dhar ,&nbsp;H.S. Arora ,&nbsp;B. Babu ,&nbsp;S.S. Roy","doi":"10.1016/j.nwnano.2024.100036","DOIUrl":"https://doi.org/10.1016/j.nwnano.2024.100036","url":null,"abstract":"<div><p>Perovskite oxides have garnered significant attention as potential active materials for supercapacitor applications. Recently, metal-doped perovskite oxides have gained prominence due to their potential to provide a synergistic blend of electrical conductivity, substantial electrochemical active surface area, and robust electrochemical activity. In this study, we systematically investigate the electrochemical properties of strontium titanate oxide (SrTiO_3, STO) and chromium-doped strontium titanate oxide (Cr-STO), synthesized via the solid-state reaction method. Various material characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS), are employed to examine the crystal structure, morphology, and chemical composition of these samples. Notably, Cr-STO demonstrates an approximately twentyfold increase in electrochemical surface area compared to pristine STO, resulting in enhanced anion storage capabilities when employed in alkaline 3 M KOH aqueous electrolytes. Detailed electrochemical kinetic studies reveal an augmented pseudocapacitive behavior in Cr-STO, with a more pronounced diffusive nature compared to pristine STO. Furthermore, symmetric supercapacitors fabricated with Cr-STO electrodes exhibit excellent electrochemical performance, maintaining over 93 % of their initial capacity after 10,000 charge-discharge cycles at a current density of 1 A g⁻¹. These findings highlight the significant potential of chromium-doped strontium titanate oxide as a valuable contribution to the ongoing pursuit of novel material for supercapacitors.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"6 ","pages":"Article 100036"},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978124000072/pdfft?md5=867f10ee9625c5dd79f56762a64d110a&pid=1-s2.0-S2666978124000072-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140545689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable and cyclic synthesis of 2D Co(OH)2 nanosheets for scalable production of high-performance electrocatalysts","authors":"Ziyi Zhang,&nbsp;Corey Carlos,&nbsp;Derui Wang,&nbsp;Yutao Dong,&nbsp;Xudong Wang","doi":"10.1016/j.nwnano.2024.100037","DOIUrl":"https://doi.org/10.1016/j.nwnano.2024.100037","url":null,"abstract":"<div><p>Ultrathin 2D nanomaterials with extremely large surface area and unique electrochemical properties are considered excellent electrocatalyst candidates for clean energy conversion and environmental applications. However, it is still challenging to prepare 2D catalysts through a scalable and sustainable process that may become suitable for industrial demands. Here, we reported a facile cyclic synthesis method of ultrathin 2D nanomaterials based on the ionic layer epitaxy. By repeatedly refreshing a surfactant monolayer on the solution surface, free-standing 2.2 nm thick hexagonal Co(OH)₂ nanosheets were obtained from the water surface at ambient conditions in multiple cycles. These nanosheets exhibited a consistently high OER performance with an average overpotential of 427.4 ± 5.3 mV at 10 mA cm⁻². Remarkably, hexagonal NSs could be obtained from a wide range of precursor concentrations which could enable over 84 cycles of synthesis on the same stock precursor solution. It will shed light on the design of autonomous and sustainable synthesis of 2D nanomaterials for advanced electrocatalysis development toward a clean future.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"6 ","pages":"Article 100037"},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978124000084/pdfft?md5=e346705cfb037ba3dbb13a80a2d90eb2&pid=1-s2.0-S2666978124000084-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140545688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards high-performance lithium-ion batteries by introducing graphene-based materials into LiFePO4 cathodes: A review","authors":"Edigar Muchuweni ,&nbsp;Edwin T. Mombeshora ,&nbsp;Cosmas M. Muiva ,&nbsp;T. Stephen Sathiaraj","doi":"10.1016/j.nwnano.2024.100034","DOIUrl":"https://doi.org/10.1016/j.nwnano.2024.100034","url":null,"abstract":"<div><p>In recent years, concerted research efforts have been aimed at improving the electrochemical performance of Li-ion batteries (LIBs) to meet the ever-increasing demand for energy storage devices in various applications, particularly powering of portable electronic devices and electric vehicles. One such novel approach entails the materials engineering of the basic LIB components, especially the cathode, which not only dominates the battery cost, but also limits the energy density. Meanwhile, the cathode is typically made up of LiCoO₂, a layered oxide, which despite having a relatively high energy density (∼150 – 190 Wh kg⁻¹), suffers from limited practical capacity (∼140 mA h g^–1), in addition to the scarcity, toxicity and high-cost of Co. Consequently, LiFePO₄ (LFP), a polyanion oxide, has emerged as a promising alternative owing to its relatively higher practical capacity (∼165 mA h g^–1), coupled with the more abundance, less toxicity and lower cost of Fe than Co. Nevertheless, LFP has shortcomings mainly due to its low ionic and electronic conductivities, which limit the cathode rate capability and energy density (∼90 – 140 Wh kg⁻¹). As a result, highly stable and conductive carbon-based materials, particularly graphene and its derivatives, have recently been introduced to LFP to enhance electron and Li-ion transport, while also prolonging the cycle life. Herein, the research progress made over the last five-year period (2018–2023) to improve the rate performance and cyclability of LFP cathodes by utilizing graphene-based materials is highlighted. Future research directions for employing LFP/graphene-based composite cathodes to further advance the electrochemical performance of next-generation LIBs are also discussed to set the stage for commercial applications.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"6 ","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978124000059/pdfft?md5=3258b4b44f17bcb4a775a211302cd857&pid=1-s2.0-S2666978124000059-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140351306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphene Oxide/Melamine/Ionic liquid membranes for selective CO2 separation","authors":"Ahmad Arabi Shamsabadi,&nbsp;Vahid Rad,&nbsp;Masoud Soroush","doi":"10.1016/j.nwnano.2024.100033","DOIUrl":"https://doi.org/10.1016/j.nwnano.2024.100033","url":null,"abstract":"<div><p>Highly permeable and selective membranes with long-term stability are needed to reduce operating and capital costs of industrial gas-separation units. In this study, we fabricate new membranes made of melamine (M)- and imidazolium-based ionic liquid (IL)-modified graphene oxide (GO) deposited on a porous support and buried with a polydimethylsiloxane (PDMS) layer. The CO₂/N₂ and CO₂/CH₄ ideal selectivities of the composite membranes are respectively 65 % and 70 % higher than those of the membranes containing only the IL. This significant improvement in ideal selectivity is attributed to synergic effects of nanochannels created by GO, fixed facilitated transport provided by the IL and numerous amine groups in the melamine structure, and the increased polarity of the membrane caused by the presence of the IL. The composite membrane has a pure CO₂ permeance of 47 GPU with a high CO₂/N₂ ideal selectivity of 109 and a satisfactory CO₂/CH₄ ideal selectivity of 39. The composite membrane maintains stable performance over a 60-hour operation, highlighting its long-term reliability. The outstanding performance, coupled with the ease of fabrication, underscores the potential of these composite membranes for practical and efficient CO₂ removal from both natural and flue gas streams in real-world applications.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"6 ","pages":"Article 100033"},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978124000047/pdfft?md5=d37ff7d7ed95a0140dd90cad14edb8b0&pid=1-s2.0-S2666978124000047-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140341279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of guanidinium iodide surface treatment on CH3NH3PbI3 perovskite solar cells with added decaphenylcyclopentasilane","authors":"Keisuke Kuroyanagi ,&nbsp;Takeo Oku ,&nbsp;Iori Ono ,&nbsp;Riku Okumura ,&nbsp;Ayu Enomoto ,&nbsp;Atsushi Suzuki ,&nbsp;Sakiko Fukunishi ,&nbsp;Tomoharu Tachikawa ,&nbsp;Tomoya Hasegawa","doi":"10.1016/j.nwnano.2024.100030","DOIUrl":"https://doi.org/10.1016/j.nwnano.2024.100030","url":null,"abstract":"<div><p>The effects of guanidinium iodide surface treatment (GST) on CH₃NH₃PbI₃ perovskite solar cells with decaphenylcyclopentasilane (DPPS) were investigated. GST decreases the carrier trap density and improves the photovoltaic characteristics. The X-ray diffraction results showed that the lattice constants of the perovskite crystals were increased by the insertion of GST and guanidinium into the methylammonium defects. The thermal stability of the unlaminated devices was tested in the air at 85 °C. The device prepared using GST exhibited the highest conversion efficiency. First-principles calculations supported these experimental results.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"5 ","pages":"Article 100030"},"PeriodicalIF":0.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978124000011/pdfft?md5=586aa62cf7c8c71d02871c0fa7bc4128&pid=1-s2.0-S2666978124000011-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139737605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphitic carbon nitride meets molecular oxygen: New sustainable photocatalytic ways for the oxidation of organic molecules","authors":"Gaia Grando ,&nbsp;Giuseppe Sportelli ,&nbsp;Giacomo Filippini ,&nbsp;Michele Melchionna ,&nbsp;Paolo Fornasiero","doi":"10.1016/j.nwnano.2023.100028","DOIUrl":"https://doi.org/10.1016/j.nwnano.2023.100028","url":null,"abstract":"<div><p>In recent years, organic chemists have taken a resolute step toward green photocatalytic synthesis. In this regard, the oxidation of organic compounds with molecular oxygen is one of the most important classes of transformations, as it increases molecular complexity while avoiding the use of toxic and harmful oxidants. To this aim, the development of new and efficient photocatalysts capable of driving valuable oxidative reactions in a sustainable manner is highly desirable. These novel photocatalytic systems need to be metal-free, easy-to-prepare, and potentially recyclable. Carbon nitride (CN) fulfills all these requirements because of its outstanding physicochemical properties, thus emerging as a promising heterogeneous photocatalytic platform. The growing popularity of this material is also substantiated by its fast and facile preparation from readily available and inexpensive molecular precursors. This Review aims at highlighting the recent advances in synthesis of carbon nitride-based materials and their applications in organic photocatalysis for the oxidation of organic molecules in presence of molecular oxygen. Lastly, forward-looking opportunities within this intriguing research field are mentioned.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"4 ","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978123000260/pdfft?md5=98280230826e1f6e66f79f0e8da475b4&pid=1-s2.0-S2666978123000260-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138396673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antiviral drug carriers for human immunodeficiency virus","authors":"Jiahui Wang,&nbsp;Ning Guo,&nbsp;Weiliang Hou","doi":"10.1016/j.nwnano.2023.100027","DOIUrl":"https://doi.org/10.1016/j.nwnano.2023.100027","url":null,"abstract":"<div><p>Human immunodeficiency virus (HIV) has become one of the greatest public health problems threatening human health. HIV treatment presents a certain limit due to the complexity of the infection cycle and the low therapeutic target. New viral drug treatments should be developed for ameliorating the potentially toxic side effects and drug resistance. Nanomaterials with strong solubility and bioavailability show obvious merit in drug delivery, which can be an effective assistant to treat HIV. Herein, various novel nanomaterials were reviewed for drug delivery, including lipid nanoparticles, polymeric nanoparticles, metal nanoparticles, micelles, etc. We also discussed the advantages and the limitations of novel nanocarriers for HIV prevention, diagnosis and treatment and prospected potential materials for HIV.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"4 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978123000259/pdfft?md5=85db1b403e324ac4c591e1b3cc2db748&pid=1-s2.0-S2666978123000259-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92073824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visible-light-driven photocatalysis for the sustainable synthesis of (±)-pregabalin using carbon nitride from melamine-cyanuric acid complex","authors":"Sumin Kim ,&nbsp;Hyunwoo Choi ,&nbsp;Minjoon Kwak ,&nbsp;Youngran Seo ,&nbsp;Dongwon Yoo","doi":"10.1016/j.nwnano.2023.100026","DOIUrl":"https://doi.org/10.1016/j.nwnano.2023.100026","url":null,"abstract":"<div><p>The pharmaceutical industry has long sought efficient and environmentally sustainable methods for the synthesis of pharmaceutically significant molecules, particularly potent γ-amino butyric acid (GABA) derivatives. Photocatalysis has emerged as a promising approach, offering mild reaction conditions and utilizing renewable energy sources. In this study, we present a novel and sustainable photocatalytic strategy for the synthesis of (±)-pregabalin, a valuable GABA derivative, using carbon nitride derived from the complex of melamine and cyanuric acid (CN-MC) as the catalyst. Under visible light irradiation, CN-MC demonstrated outstanding photocatalytic performance, achieving an excellent 99% yield in the visible-light-driven decarboxylative radical conjugate addition. The formed β-substituted γ-lactam intermediate serves as a crucial building block for the synthesis of (±)-pregabalin. Moreover, the recyclability and scalability of CN-MC as a photocatalyst enhance the process's eco-friendliness, making it an appealing option for large-scale pharmaceutical synthesis.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"4 ","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50178911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A perspective on the synergistic use of 3D printing and electrospinning to improve nanomaterials for biomedical applications","authors":"Ovinuchi Ejiohuo","doi":"10.1016/j.nwnano.2023.100025","DOIUrl":"https://doi.org/10.1016/j.nwnano.2023.100025","url":null,"abstract":"<div><p>3D printing and electrospinning are used to fabricate complex structures with improved properties. Combining 3D printing and electrospinning potentially creates composite structures with even superior properties for biomedical applications. However, there is limited research, use, and literature on this synergy. While 3D printing is used extensively in the biomedical and pharmaceutical industries, the 3D printed polymer strength can be limited due to the high cooling rate during the printing process, resulting in a lack of crystallinity. Additives such as crosslinkers and reinforcements such as particles, nanomaterials, and fibers are often incorporated into the polymer melt to improve its properties. One promising reinforcement is electrospun nanofibers, which have high aspect ratios, specific surface area, and porosity. However, electrospinning can result in variability in fiber size and morphology.</p><p>Further research is needed to optimize the technique and improve its reproducibility. This perspective provides an assessment of this synergistic technology. This study explores the potential for biomedical applications while offering opinions on the most recent research combining 3D printing and electrospinning. The fact that effective 3D printing and electrospinning integration can generate a powerful platform to develop nanomaterials with superstructures highlights the high significance of this perspective.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"4 ","pages":"Article 100025"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50178912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical epitaxy of nanostructures","authors":"Yuwei Guo ,&nbsp;Yang Hu ,&nbsp;Jian Shi","doi":"10.1016/j.nwnano.2023.100024","DOIUrl":"https://doi.org/10.1016/j.nwnano.2023.100024","url":null,"abstract":"<div><p>Epitaxy of nanostructured materials is a critical step in developing functional nanodevices. Electrochemical epitaxy has been shown robust and low-cost in advancing the deployment of nanomaterials. This paper offers a brief review on a wide category of nanostructured materials and phases synthesized via electrochemical epitaxy approaches over the past several decades. The review highlights the advantages of electrochemical approach over other high-temperature, high-vacuum technologies in terms of accessibility to target materials’ phases, morphologies and yield. Electrochemical epitaxy's extraordinary ability in enabling certain valence states which cannot be reached at vacuum condition could bring new concepts in developing a plethora of metastable functional materials. It also gives an overview on possible growth modes and mechanisms that may be employed in developing emerging materials and phases.</p></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"4 ","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666978123000223/pdfft?md5=fc02f12eac76d7dabaf7d30763b2c85a&pid=1-s2.0-S2666978123000223-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72249462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}