Inorganics最新文献_第6页

Porous Nb2O5 Nanofibers Prepared via Reactive Needle-Less Electrospinning for Application in Lithium–Sulfur Batteries 通过反应性无针电纺丝制备多孔 Nb2O5 纳米纤维以应用于锂硫电池

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-25 DOI: 10.3390/inorganics11120456

I. Shepa, E. Múdra, D. Capková, A. Kovalčíková, Ondrej Petrus, Frantisek Kromka, O. Milkovič, V. Antal, M. Baláž, M. Lisnichuk, Dominika Marcin-Behunova, D. Zalka, Ján Dusza

{"title":"Porous Nb2O5 Nanofibers Prepared via Reactive Needle-Less Electrospinning for Application in Lithium–Sulfur Batteries","authors":"I. Shepa, E. Múdra, D. Capková, A. Kovalčíková, Ondrej Petrus, Frantisek Kromka, O. Milkovič, V. Antal, M. Baláž, M. Lisnichuk, Dominika Marcin-Behunova, D. Zalka, Ján Dusza","doi":"10.3390/inorganics11120456","DOIUrl":"https://doi.org/10.3390/inorganics11120456","url":null,"abstract":"This contribution describes the preparation, coupled with detailed characterization, of Nb2O5 nanofibers and their application in lithium–sulfur batteries for the improvement of electrochemical performance. The utilization of reactive needle-less electrospinning allowed us to obtain, in a single step, amorphous pre-ceramic composite PAN/Nb2O5 fibers, which were transformed into porous ceramic Nb2O5 nanofibers via calcination. Thermogravimetric studies defined that calcination at 600 °C results in crystalline ceramic fibers without carbon residues. The fibrous morphology and mean diameter (614 ± 100 nm) of the ceramic nanofibers were analyzed via scanning and transmission electron microscopy. A surface area of 7.472 m2/g was determined through nitrogen adsorption measurements, while a combination of X-ray diffraction and Raman spectroscopy was used to show the crystallinity and composition of the fibers after calcination—single T-phase Nb2O5. Its performance in the cathode of lithium–sulfur batteries was defined through electrochemical tests, and the obtained results were compared to a similar blank electrode. The initial discharge capacity of 0.5 C reached a value of 570 mAh∙g−1, while the reversible capacity of 406 mAh∙g−1 was retained after 200 cycles, representing a capacity retention of 71.3%. The presence of Nb2O5 nanofibers in the carbon cathode inhibits the shuttle effect through polysulphide confinement, which originates from porosity and chemical trapping.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"26 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139236241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solid Solutions LnxU1−xC2 with Ln = Tb, Dy, Ho, Tm, and Lu Showing Ideal Vegard Behavior Ln = Tb、Dy、Ho、Tm 和 Lu 的固体溶液 LnxU1-xC2 显示理想的 Vegard 行为

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-25 DOI: 10.3390/inorganics11120457

Christian Tobeck, Heiko Wende, U. Ruschewitz

{"title":"Solid Solutions LnxU1−xC2 with Ln = Tb, Dy, Ho, Tm, and Lu Showing Ideal Vegard Behavior","authors":"Christian Tobeck, Heiko Wende, U. Ruschewitz","doi":"10.3390/inorganics11120457","DOIUrl":"https://doi.org/10.3390/inorganics11120457","url":null,"abstract":"The reaction of UO2 with the respective lanthanide metal and purified graphite in an arc-melting furnace led to the formation of solid solutions of the composition LnxU1−xC2, with Ln = Tb, Dy, Ho, Tm, and Lu. They all crystallize in the tetragonal CaC2 type structure (I4/mmm, Z = 2). Elemental analyses of selected samples (EDX) confirm that the composition of the resulting solid solution is in reasonable agreement with the nominal (weighed-in) composition of the starting materials, i.e., a significant evaporation of the lanthanide metals during the arc-melting synthesis does not occur. The lattice parameters of the solid solutions were extracted using Le Bail fits of high-resolution synchrotron powder diffraction data (beamline P02.1, DESY, Hamburg, Germany; beamline BL 09, DELTA, Dortmund, Germany), revealing ideal Vegard behavior for all five solid solutions. XANES investigations on all compounds at the Ln-LIII and U-LIII edges reveal that the occupancies of the U-6d orbitals decrease with increasing x, whereas the occupancies of the Ln-5d orbitals increase, pointing to an electron transfer from the uranium to the lanthanide cations. Examination of the shifts of the absorption edge (E0) leads to the same finding.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"10 24","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Repair of Small-Area Delamination in Carbon Fiber-Reinforced Polymer through Small Drilled Hole and Carbon Nanotubes-Reinforced Resin Pre-Coating Technique 通过小钻孔和碳纳米管增强树脂预涂层技术修复碳纤维增强聚合物中的小面积分层

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-24 DOI: 10.3390/inorganics11120454

Gang Han, Xiaozhi Hu

{"title":"Repair of Small-Area Delamination in Carbon Fiber-Reinforced Polymer through Small Drilled Hole and Carbon Nanotubes-Reinforced Resin Pre-Coating Technique","authors":"Gang Han, Xiaozhi Hu","doi":"10.3390/inorganics11120454","DOIUrl":"https://doi.org/10.3390/inorganics11120454","url":null,"abstract":"This study explores the potential for repairing small, isolated delamination areas in carbon fiber-reinforced polymer (CFRP), while preserving the integrity of the composite structures. A small drilled hole at the center of the delamination section served as a channel for the epoxy infill of the sharp delamination cracks. The pressureless infill repair was achieved through the capillary action of an acetone-diluted resin pre-coating (RPC) solution (without hardener) with CNT reinforcement, comprising 89 m/m% acetone, 10 m/m% resin, and 1 m/m% CNT. This acetone-rich resin pre-coating (RPC) solution is easily prepared and applied to the drilled hole area. Curing of the CNT-toughened resin infill was induced by filling the small drilled hole with a resin–hardener mixture toughened by CNT/aramid pulp. The effectiveness of the delamination repair was compared for curing periods of two weeks and three months. The flexural strength measurements indicated that a restoration level of 77% was achieved in this study, while the optimum 100% restoration was achieved using the same technique for edge delamination repairs.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"74 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139239094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Use of Rapid Precipitation to Synthesise Multivariate UiO-66 Metal–Organic Frameworks for Photocatalysis 利用快速沉淀法合成用于光催化的多元 UiO-66 金属有机框架

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-24 DOI: 10.3390/inorganics11120455

Ehsan Ezzatpour Ghadim, Marc Walker, Richard I. Walton

{"title":"The Use of Rapid Precipitation to Synthesise Multivariate UiO-66 Metal–Organic Frameworks for Photocatalysis","authors":"Ehsan Ezzatpour Ghadim, Marc Walker, Richard I. Walton","doi":"10.3390/inorganics11120455","DOIUrl":"https://doi.org/10.3390/inorganics11120455","url":null,"abstract":"A rapid synthesis method is used to form multivariate metal–organic frameworks (MTV-MOFs) with the UiO-66 structure, where precipitation occurs upon mixing solutions of ligands and metal salts at temperatures less than 60 °C. The materials include mixtures of metals and ligands, Ce/Zr-UiO-66(1,4-NDC/BDC), Ce/Zr-UiO-66(1,4-NDC/2,6-NDC), Ce/Zr-UiO-66(1,4-NDC), Ce/Ti-UiO-66(1,4-NDC), and Ce/Ti-UiO-66(BDC-NH2) (NDC = naphthalene dicarboxylate, BDC = benzene-1,4-dicarboxylate, BDC-NH2 = 2-amino-benzene-1,4-dicarboxylate). Phase purity was determined by powder X-ray diffraction (PXRD), with a broadening of the profile indicative of nanoscale crystallites, verified by scanning electron microscopy (SEM). The molar ratio of metals and organic ligands in Ce/Zr-UiO-66(1,4-NDC/2,6-NDC) was confirmed by X-ray fluorescence (XRF) and solution 1H nuclear magnetic resonance (NMR) after digestion, respectively. Analysis of the adsorption of dyes by the MTV-MOFs showed that a pseudo-first-order model accounts for the kinetics. The effectiveness of photocatalytic degradation of two cationic (methylene blue and rhodamine B) and two anionic (Congo red and Alizarin Red S (AR)) dyes was studied under UV and visible light. The most effective photocatalytic degradation was found between 1 and 15 min towards both cationic and anionic dyes by Ce/Zr-UiO-66(1,4-NDC/2,6-NDC). Measurements of recyclability and photostability showed retention of crystallinity after five cycles of use and exposure to light for 17 h, as confirmed by PXRD.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"148 4","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple Synthesis and Characterization of Cobalt Ferrite Nanoparticles for the Successful Adsorption of Indigo Carmine Dye from Aqueous Media 成功吸附水介质中靛蓝胭脂红染料的钴铁氧体纳米粒子的简单合成与表征

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-24 DOI: 10.3390/inorganics11120453

A. Al-Wasidi, Ehab A. Abdelrahman

{"title":"Simple Synthesis and Characterization of Cobalt Ferrite Nanoparticles for the Successful Adsorption of Indigo Carmine Dye from Aqueous Media","authors":"A. Al-Wasidi, Ehab A. Abdelrahman","doi":"10.3390/inorganics11120453","DOIUrl":"https://doi.org/10.3390/inorganics11120453","url":null,"abstract":"Indigo carmine dye falls into the category of toxic chemicals, potentially leading to irritation and allergic reactions in certain individuals. Thus, this study employed the Pechini sol–gel strategy to easily produce CoFe2O4 nanoparticles, which serve as an effective adsorbent for the disposal of indigo carmine dye from aqueous solutions. The maximum adsorption capacity of CoFe2O4 for indigo carmine dye was determined to be 421.94 mg/g. The synthesized CoFe2O4 nanoparticles exhibited an average crystallite size of 18.75 nm. SEM analysis revealed that these nanoparticles were nearly spherical, with an average grain size of 198.32 nm. Additionally, TEM analysis indicated a fully agglomerated spherical morphology for the CoFe2O4 sample, with an average diameter of 15.37 nm. The EDS spectrum confirmed that the synthesized CoFe2O4 nanoparticles consisted of Co, Fe, and O elements, with respective weight percentages of 17.82%, 49.46%, and 32.72%. The removal of indigo carmine dye by the synthesized CoFe2O4 is spontaneous, chemical, exothermic, closely fitting the pseudo-second-order kinetic model, and demonstrating a strong concordance with the Langmuir equilibrium isotherm.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"30 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139242033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetostructural D-Correlations and Their Impact on Single-Molecule Magnetism 磁结构 D 关联及其对单分子磁性的影响

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-23 DOI: 10.3390/inorganics11120452

J. Titiš, C. Rajnák, Roman Boča

{"title":"Magnetostructural D-Correlations and Their Impact on Single-Molecule Magnetism","authors":"J. Titiš, C. Rajnák, Roman Boča","doi":"10.3390/inorganics11120452","DOIUrl":"https://doi.org/10.3390/inorganics11120452","url":null,"abstract":"Functional dependence of the axial zero-field splitting parameter D with respect to a properly chosen geometrical parameter (Dstr) in metal complexes is termed the magnetostructural D-correlation. In mononuclear hexacoordinate Ni(II) complexes with the ground electronic term 3B1g (3A2g in the regular octahedron), it proceeds along two intercepting straight lines, allowing for predicting the sign and magnitude of the D-parameter by knowing the X-ray structure alone; Dstr is constructed from the metal–ligand bond lengths. In hexacoordinate Co(II) complexes, it is applicable only in the segment of the compressed bipyramid where the ground electronic term 4B1g is orbitally non-degenerate so that the spin Hamiltonian formalism holds true. The D vs. Dstr correlation is strongly non-linear, and it is represented by a set of decreasing exponentials. In tetracoordinate Co(II) complexes, on the contrary, the angular distortion from the regular tetrahedron is crucial so that the appropriate structural parameter Dstr is constructed of bond angles. The most complex case is represented by pentacoordinated Co(II) systems, for which it is not yet possible to define a statistically significant correlation. All of these empirical correlations originate in the electronic structure of metal complexes that can be modelled using generalized crystal-field theory. As the barrier to spin reversal in single-molecule magnets is proportional to the D-value, for rational tuning and/or prediction of the single-molecule magnetic behaviour, knowledge/prediction of the D-parameter is beneficial. In this review, we present the statistical processing of an extensive set of structural and magnetic data on Co(II) and Ni(II) complexes, which were published over the past 15 years. Magnetostructural D-correlations defined for this data set are reviewed in detail.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"1 ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139244526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pentadentate and Hexadentate Pyridinophane Ligands Support Reversible Cu(II)/Cu(I) Redox Couples 五齿和六齿吡啶玢配体支持可逆的铜（II）/铜（I）氧化还原偶联物

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-20 DOI: 10.3390/inorganics11110446

Glenn Blade, Andrew J. Wessel, Karna Terpstra, Liviu M. Mirica

引用次数: 0

Heteroleptic Copper(II) Complexes Containing an Anthraquinone and a Phenanthroline as Synthetic Nucleases and Potential Anticancer Agents 作为合成核酸酶和潜在抗癌剂的含蒽醌和菲罗啉的异性铜（II）配合物

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-19 DOI: 10.3390/inorganics11110445

Ívina P. de Souza, Júlia R. L. Silva, Amanda O. Costa, J. T. J. Freitas, Renata Diniz, Rodrigo B. Fazzi, A. M. da Costa Ferreira, E. Pereira-Maia

{"title":"Heteroleptic Copper(II) Complexes Containing an Anthraquinone and a Phenanthroline as Synthetic Nucleases and Potential Anticancer Agents","authors":"Ívina P. de Souza, Júlia R. L. Silva, Amanda O. Costa, J. T. J. Freitas, Renata Diniz, Rodrigo B. Fazzi, A. M. da Costa Ferreira, E. Pereira-Maia","doi":"10.3390/inorganics11110445","DOIUrl":"https://doi.org/10.3390/inorganics11110445","url":null,"abstract":"Two ternary copper(II) complexes with an anthraquinone and a N,N-heterocyclic donor, [Cu(dmp)(L)(H2O)](ClO4) (1), [Cu(bpy)(L)(dmso)](ClO4) (2), in which dmp = 2,9-dimethyl-1,10-phenanthroline, bpy = 2,2′-bipyridine, and HL = 1-hydroxyanthracene-9,10-dione were synthesized and fully characterized by conductivity, elemental, and spectral analyses (FTIR and UV-Vis; EPR and ESI-MS). The structure of 1 reveals that Cu(II) is bound to two oxygens of L, two nitrogens of dmp, and a molecule of water in the fifth position. In complex 2.1, Cu(II) is also pentacoordinated with an O-bonded dmso in the axial position. The presence of the heteroleptic complexes in solution was evidenced by ESI-MS, EPR in dmso solution and UV-Vis spectrophotometry. All complexes bind to CT-DNA with affinity constants of approximately 104. Complex 2 can nick plasmid DNA but no cleavage was performed by complex 1. The investigation of DNA interactions by spectrofluorimetry using ethidium bromide (EB) showed that it was displaced from DNA sites by the addition of the complexes. The complexes inhibited the growth of chronic myelogenous leukemia and human squamous carcinoma cells with low IC50 values, complex 1 being the most effective.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"24 7","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139260629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vibrational Coherence in the Metal–Metal-Bonded Excited State of Pt(II) Complexes 铂(II)配合物中金属-金属键激发态的振动相干性

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-18 DOI: 10.3390/inorganics11110441

Tengfei Yan, Qingyun Wan

引用次数: 0

Exploration of Lycorine and Copper(II)’s Association with the N-Terminal Domain of Amyloid β 探究番茄红素和铜（II）与淀粉样蛋白 β N 端结构域的联系

IF 2.9 4区化学

Inorganics Pub Date : 2023-11-18 DOI: 10.3390/inorganics11110443

A. Kola, Ginevra Vigni, D. Valensin

{"title":"Exploration of Lycorine and Copper(II)’s Association with the N-Terminal Domain of Amyloid β","authors":"A. Kola, Ginevra Vigni, D. Valensin","doi":"10.3390/inorganics11110443","DOIUrl":"https://doi.org/10.3390/inorganics11110443","url":null,"abstract":"Lycorine (LYC) is an active alkaloid first isolated from Narcissus pseudonarcissus and found in most Amaryllidaceae plants. It belongs to the same family as galantamine, which is the active component of a drug used for the treatment of Alzheimer’s disease. Similarly to galantamine, LYC is able to suppress induced amyloid β (Aβ) toxicity in differentiated SH-SY5Y cell lines and it can weakly interact with the N-terminal region of Aβ via electrostatic interactions. The N-terminal Aβ domain is also involved in Cu(II)/Cu(I) binding and the formed complexes are known to play a key role in ROS production. In this study, the Aβ–LYC interaction in the absence and in the presence of copper ions was investigated by using the N-terminal Aβ peptide encompassing the first 16 residues. NMR analysis showed that Aβ can simultaneously interact with Cu(II) and LYC. The Cu(II) binding mode remains unchanged in the presence of LYC, while LYC association is favored when an Aβ–Cu(II) complex is formed. Moreover, UV-VIS studies revealed the ability of LYC to interfere with the catalytic activities of the Aβ–Cu(II) complexes by reducing the ascorbate consumption monitored at 265 nm.","PeriodicalId":13572,"journal":{"name":"Inorganics","volume":"41 04","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139261883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0