Next Materials最新文献

{"title":"Coal to graphene-based materials: Evaluating coal as a potential feedstock to pave way for large scale production of graphene and related materials, a review","authors":"Boitshepho Ivy Marakalala ,&nbsp;Victor K. Manisa ,&nbsp;Tumeletso Lekgoba ,&nbsp;Freeman Ntuli ,&nbsp;Vepika Kandjou","doi":"10.1016/j.nxmate.2025.100519","DOIUrl":"10.1016/j.nxmate.2025.100519","url":null,"abstract":"<div><div>Of recent, coal and other abundant carbon-rich materials are emerging as potential feedstocks and precursors in the production of graphene-based materials such as pristine graphene and graphene oxide and reduced graphene oxide. Considering the abundance of coal reserves globally, using coal as a feedstock in the production of graphene-based materials offers potential in large scale production and paving a way towards the realisation of industrial application of these versatile nanomaterials. The paper explores the prospective of coal as a raw material for graphene and graphene oxide production, by evaluating the quality of the graphene and graphene oxide produced in terms of the aspect ratio, singularity of the sheets and the general physicochemical characteristics. The novelty of the production of graphene-based material from coal means that limited works exist in this area hence the significance of this review. The review is also geared towards valorising various coal type feedstocks including stock piling coal fines in various regions especially in Sub-Saharan Africa. An overview of possible applications of the resultant coal-based graphene and graphene oxide are reviewed.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100519"},"PeriodicalIF":0.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349241","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":"Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars","authors":"M.L. Peixoto ,&nbsp;S.D. Jesus ,&nbsp;H.S. Cavalcante ,&nbsp;B.S. Teti ,&nbsp;R.C. Manta ,&nbsp;N.B. Lima ,&nbsp;H.C.B. Nascimento ,&nbsp;S. Fucale ,&nbsp;N.B.D. Lima","doi":"10.1016/j.nxmate.2025.100514","DOIUrl":"10.1016/j.nxmate.2025.100514","url":null,"abstract":"<div><div>To minimize the environmental impacts of construction and demolition waste (CDW) generation, it is essential to investigate sustainable materials' chemical and microstructural aspects, such as fine recycled concrete aggregate into cement-based mortars. A comprehensive experimental program was conducted to evaluate workability, compressive strength, and microstructural characteristics, providing insight into sustainable applications in construction. In this sense, the main goal of the present work is to examine the mechanical behavior of mortars produced with CDW due to their potential for introduction into the civil construction market. The mortars were made to evaluate the mechanical behavior and characterization tests of recycled and natural aggregates, consistency index, mass density, resistance to simple compression, x-ray diffraction, and scanning electron microscopy. The results revealed that the grains' maximum characteristic dimension corresponds to 2.36 mm, equivalent to the fine sand used. However, the water absorption of the recycled aggregate was 20.1 %, which is higher than the water absorption of fine sand, which corresponds to 12.5 %. The 1:4 ratio with 30 % replacement content showed better workability and compressive strength of 44.92 MPa. However, the 1:7 ratio showed high consistency rates due to the water-cement ratio. Further, the XRD results revealed diffraction peaks associated with Quartz, Portlandite, and Ettringite phases, corroborating the technical feasibility of using CDW. Finally, high partial replacements of fine natural aggregate by fine recycled concrete aggregate have technical and sustainable. This work highlights its potential to reduce construction costs and environmental impact, contributing to the circular economy.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100514"},"PeriodicalIF":0.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349396","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":"Microstructural evolution of FeCoNiCrMn high-entropy alloy subjected to laser shock peening: Molecular dynamics simulation study","authors":"Weizhou Xu ,&nbsp;Yongxiang Geng ,&nbsp;Haizhong Zheng ,&nbsp;Yixin Xiao","doi":"10.1016/j.nxmate.2025.100523","DOIUrl":"10.1016/j.nxmate.2025.100523","url":null,"abstract":"<div><div>Molecular dynamics (MD) and Monte Carlo (MC) simulations are used to study the microstructural evolution of FeCoNiCrMn high-entropy alloys (HEA) after laser shock peening (LSP). The shock wave structure, microstructure, and dislocation evolution of single-crystal HEA after LSP are investigated at different shock velocities and shock directions. The elastic-plastic wave segregation of single-crystal HEA is observed at [110] crystal-direction shock. The cold fusion occurs in [110] and [111] crystal directions. After [001] grain direction shock, mainly the Hexagonal close-packed(HCP) phase is produced. The [110] and [111] grain directions mostly produce disordered structures aftershock. Lower-density dislocations are produced in the short-range ordered (SRO) model. A more complex microstructural evolution exists in nanocrystalline HEA due to the strong anisotropy of single-crystal HEA. A large number of stacking faults (SFs), twins, Hirth dislocation locks, and Lomer-Cottrell lock (LC) structures are generated. At the same time, nanocrystalline HEA produces a large number of dislocation entanglements near grain boundaries, leading to the precipitation of a large number of subgrains.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100523"},"PeriodicalIF":0.0,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349107","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":"Forming ability of the WC-based ceramic metal composites with different Fe-based binders by unique laser beam modulation","authors":"H.S. Maurya ,&nbsp;K. Juhani ,&nbsp;F. Sergejev ,&nbsp;R. Kumar ,&nbsp;A. Hussain ,&nbsp;K.G. Prashanth","doi":"10.1016/j.nxmate.2025.100524","DOIUrl":"10.1016/j.nxmate.2025.100524","url":null,"abstract":"<div><div>Additive manufacturing enables the production of cermet parts encompassing intricate geometries and tailored microstructures. The present study investigates the fabrication of WC-based Ceramic metal composites (CMC) with pure Fe and ferritic stainless steel (AISI Grade 430 L) green binders by controlling melt pool temperature during the Selective laser melting process. A study of crack restraining and formability of WC composite parts with different Fe-based binder compositions has been conducted by adapting Laser beam modulation (LBM). As a result of optimizing the laser beam with variations in laser power peaks (48, 60, and 72 Watt) and constant exposure times for each laser beam profile, the melt pool temperature was regulated, primary cracks in the parts were reduced and this resulted in the fabrication of the parts with reduced process defects such as internal thermal cracks. The reduction in cracks has been attributed to a lower thermal gradient, which has affected the microstructure and microhardness of the as-built parts. Scanning electron microscope (SEM) and X-ray diffraction (XRD) analysis have been used to study the microstructure and phase formation in the fabricated parts. The maximum microhardness (2048 ± 209 HV₁) has been achieved for the fabricated cermets parts with ferritic stainless steel binder with the composition of WC-20 wt% FeCr.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100524"},"PeriodicalIF":0.0,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349108","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":"Circularly polarized reflection spectra of a photonic beetle and preparation of tunable circularly polarized light reflecting device consisting of conductive polymer/beetle exoskeleton","authors":"Hiromasa Goto ,&nbsp;Katsuto Yamaguchi,&nbsp;Ryo Miyashita","doi":"10.1016/j.nxmate.2025.100516","DOIUrl":"10.1016/j.nxmate.2025.100516","url":null,"abstract":"<div><div>The surface structure of the exoskeleton of <em>Anomala albopilosa</em> as a photonic insect is visually examined, followed by the measurement of the circularly polarized laser reflection spectrum to assess the reflection of circularly polarized light from the surface. The elytron of <em>Anomala albopilosa</em> is coated with the conductive polymer polyaniline (PANI). The PANI layer alters the transmission of light through the doping-dedoping process. This light shutter function enables the tuning of circularly polarized light reflection from the elytron surface, providing a tunable circularly polarized light reflector. This composite represents a novel bio/synthetic polymer combination with tunable circularly polarized light reflection intensity.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100516"},"PeriodicalIF":0.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192997","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":"Petals morphology formation and pseudocapacitive properties of LiGa5O8 ceramics","authors":"Aditya Sharma ,&nbsp;Manas Nasit ,&nbsp;Nitin Kumar Gautam ,&nbsp;Shalendra Kumar ,&nbsp;Ranjeet Brajpuriya ,&nbsp;B.H. Lee ,&nbsp;S.O. Won ,&nbsp;Mayora Varshney ,&nbsp;Nishima Chaddha ,&nbsp;H.J. Shin","doi":"10.1016/j.nxmate.2025.100521","DOIUrl":"10.1016/j.nxmate.2025.100521","url":null,"abstract":"<div><div>The LiGa₅O₈ samples have been prepared using the solid-state reaction method (annealed at 800 ⁰C and 1300 ⁰C) and investigated for electrochemical properties. X-ray diffraction (XRD) results confirmed the spinel structure stability up to 1300 ⁰C. Scanning electron microscopy (SEM) results convey petals-like morphology formation in the LiGa₅O₈ compounds. The 800 ⁰C annealed sample consists of two different pores of 41.5 Å and 72.3 Å with a larger specific surface area of 0.982 m²/g. The 1300 ⁰C annealed sample obeys a specific surface area of 0.433 m²/g and a single pore of the size of 48.5 Å. The redox feature-rich CV curves and the pseudo-capacitance charging/discharging characteristics from GCD results have offered a specific capacitance of ∼107.6 F/g (at a scan rate of 5 mV/s) and 141.8 F/g (at a current density of 1 A/g), respectively, for LiGa₅O₈-800 sample. The LiGa₅O₈ −1300 sample could exhibit lesser specific capacitance of 84.4 F/g (at 5 mV/s scan rate) and 97.2 F/g (at a current density of 1 A/g) due to the inferior adsorption/desorption and lithiation/delithiation reactions at the petals of subordinate surface area and pores. LiGa₅O₈-800 and LiGa₅O₈-1300 samples have exhibited 77 % and 70 % retention up to 3000 cycles. Our results pave the way to explore new, cost-effective, and stable oxide systems for energy storage devices.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100521"},"PeriodicalIF":0.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192996","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":"Spectroscopic, DFT, anti-bacterial, and in-silico investigations of novel semicarbazone and thiosemicarbazone synthesised from asymmetrical chalcones","authors":"Nikita Sharma ,&nbsp;Har Lal Singh","doi":"10.1016/j.nxmate.2025.100511","DOIUrl":"10.1016/j.nxmate.2025.100511","url":null,"abstract":"<div><div>Antimicrobial drugs that target human pathogenic bacteria and fungi include derivatives of thiosemicarbazone and semicarbazone. This work was intended to explore the novel antibacterial agents derived from thiosemicarbazone and semicarbazone derivatives in the light of these potential agents. Ten derivatives of the unsymmetrical chalcone thiosemicarbazone and semicarbazone were synthesised at room temperature. After that the synthesis compounds were investigated using elemental analysis, melting point, UV, IR, ¹H-, ¹³C-NMR spectroscopy and mass spectrometry. Later, computational tools were utilised for evaluating pharmacological attributes such as bioavailability score, Lipinski rule, absorption, distribution, metabolism, excretion and toxicity. Also, density functional theory (DFT) was used to compute quantum computations such as HOMO, LUMO, and chemical descriptors. Finally, molecular docking was performed against two dangerous bacteria (<em>Bacillus subtilis</em> and <em>Escherichia coli</em>). Based on the docking score and binding affinity calculation, these derivatives were found to have a greater affinity than standard antibiotics against selected the pathogens. Based on the computational details, it may be determined to do an in-vitro test for antibacterial activity against <em>B. subtilis</em> and <em>E.coli</em>. Through resulting antibacterial activity, results were compared to standard medications and it was discovered that a couple of synthesized compounds had nearly the same value as standard drugs. The pharmacokinetics, drug-likeness, and physicochemical characteristics were predicted by the SwissADME software. The findings suggested that thiosemicarbazones and semicarbazones possess favorable interaction patterns and binding energies. The biological capacity of each molecule to inhibit bacterial strains exhibited variability in the evaluation of the compounds' in vitro antibacterial efficacy. Thus, synthesized compounds may function as a potential target for bacterial agents. Based on the results obtained, future work will focus on selected compounds for the synthesis of metal complexes and their <em>in-vivo</em> investigations.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100511"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192995","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":"Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR)","authors":"Ziyu Guo,&nbsp;Wenyu Gong,&nbsp;Jianing Guo,&nbsp;Mingxing Wu","doi":"10.1016/j.nxmate.2025.100518","DOIUrl":"10.1016/j.nxmate.2025.100518","url":null,"abstract":"<div><div>Developing low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched hollow carbon nanofibers with opens at both ends (HCNFs) are first synthesized, which show decent catalytic activity for the IRR, and a power conversion efficiency (PCE) of 6.95 % is achieved by the corresponding DSCs. Cobalt (II) phthalocyanine derived Co₃O₄ incorporated HCNFs (Co₃O₄@HCNFs) are further prepared to improve the catalytic activity, generating a high PCE of 8.36 %, indicating a photovoltaic enhancement of 20.3 % as compared with HCNFs. Similarly, Co₃O₄@HCNFs also exhibit excellent ORR performance, and the half-wave potential (E_1/2) is up to 0.827 V, with the limiting current density (J_lim) improved to 4.54 mA·cm⁻². In contrast, the E_1/2 and J_lim of the pristine HCNFs are 0.630 V and 3.99 mA·cm⁻², respectively, much lower than those of Co₃O₄@HCNFs. The remarkable catalytic activity of Co₃O₄@HCNFs can be ascribed the introduced Co₃O₄, resulting in additional active sites of Co-N-C, and the synergistic effects between metals and carbon also accounts for the enhanced catalytic activity. Moreover, the specific hollow structure with opens at both ends is beneficial for mass diffusion to ensure sufficient contact between the electrolyte and the electrocatalysts, which is also a possible reason for the high catalytic activity of Co₃O₄@HCNFs. This work is expected to provide a feasible strategy for exploring low-cost and highly effective bifunctional IRR/ORR electrocatalysts for DSCs and ZABs.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100518"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159996","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":"Fabrication of self-standing hyperbranched poly(ethyleneimine) film with shape-memory and copper adsorption behavior via simple polymer reaction with tetraazacalix[2]arene[2]triazine dichloride","authors":"Tomohiro Suzuki ,&nbsp;Ryota Shibata ,&nbsp;Tadashi Tsukamoto ,&nbsp;Yuji Shibasaki","doi":"10.1016/j.nxmate.2025.100513","DOIUrl":"10.1016/j.nxmate.2025.100513","url":null,"abstract":"<div><div>Hyperbranched poly(ethyleneimine) (PEI, <em>M</em>_n 10 kDa) was simply reacted with tetraazacalix[2]arene[2]triazine (ACAT) dichloride in a feed ratio from 1:1 to 1:5 under diluted conditions to produce self-standing PEI modified films with good mechanical strength and thermal properties. In a dynamic mechanical analysis (DMA), the glass transition temperature of the modified polymer was observed from −13.6°C to 35.1 °C, and this value increased with the amount of ACAT modifier. A small relaxation was observed in DMA at temperatures above 70°C, which was due to the partial cleavage of the hydrogen bonds between ACAT and PEI segments. By virtue of these two relaxation phenomena, the PEI modified films exhibited shape-memory properties. Since the films were insoluble in water, their copper adsorption behavior was studied, finding that the modified polymer powder rapidly adsorbed 1.5 mg/g copper ion within 1 h.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100513"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159997","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":"Investigation of structure, mechanical properties, and electrical conductivity of LixCo(1-x)O2: Validation using a nanoquantum model","authors":"Obaidallah A. Algethami","doi":"10.1016/j.nxmate.2025.100510","DOIUrl":"10.1016/j.nxmate.2025.100510","url":null,"abstract":"<div><div>Nanoquantum models are built in order to advance nanotechnology by adapting classical laws to quantum principles using string theory. In this study, a theoretical model based on string theory is proposed to meld — and then extract — mechanical and electrical properties that recognize the particle-wave duality inherent in Quantum laws. Experimentally, lithium cobalt oxide (Li_xCo_(1-x)O₂; x = 0.1, 0.3, 0.5, 0.7, and 0.9) nanoparticles were synthesized by the sol-gel method. X-ray diffraction analysis revealed the hexagonal crystal structure (R-3m space group). It has been shown that reducing the lithium concentration results in greater dislocation density, internal stress, strain, and smaller nanocrystal size. Electrical measurements exhibit semiconducting behavior, with increasing conductivity as a function of temperature and lithium concentration. Improved conductivity is inherently tied to storage capacity and so offers the potential to improve lithium-ion battery performance. Infrared analysis shows that Li-Co bonds exist at wavenumbers of approximately 600 and 900 cm⁻¹ and Co bonds at about 1080 and 1580 cm⁻¹ . The quantum model agrees well with the measured electrical and mechanical properties and provides a new framework for acceleration nanotechnology research. The results indicate a systematic approach to enhancing nanomaterials for energy storage and other applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100510"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159995","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}