Materials Research Bulletin最新文献

{"title":"Mesoporous PdO/Bi2WO6: An outstanding step-scheme heterostructure for enhanced and accelerated visible-light-prompted reduction of nitrobenzene","authors":"Reda M. Mohamed ,&nbsp;Fatehy M. Abdel-Haleem ,&nbsp;Tamer M. Khedr ,&nbsp;Faisal K. Algethami","doi":"10.1016/j.materresbull.2025.113609","DOIUrl":"10.1016/j.materresbull.2025.113609","url":null,"abstract":"<div><div>Transforming highly hazardous nitrobenzene (NTr) into aniline (ANi), an industrially valuable substance, is considerably challenging. In this study, Bi₂WO₆ (BW) with mesoporous character was manufactured through a facile soft-template-mediated sol-gel methodology. PdO nanoparticles (NPs) with different amounts were then evenly spread on the BW surface using a method of imbibition and calcination, creating heterojunction PdO/BW step (<em>S</em>)-scheme catalytic substances. The as-fabricated catalytic substances were scrutinized via several advanced techniques and then evaluated through PCr of NTr under visible light. Exhaustive characterization demonstrated a tight interfacial coupling between BW and PdO, and effective S-scheme charge mobility in the heterostructure system. Moreover, the as-fabricated heterojunction catalysts exhibited a nanoplate-like morphology with a mesoporous nature and relatively significant surface area. Electrochemical and optical examinations unveiled superb capability to harvest visible light and demonstrated promoted light-generated charge carrier separation abilities for the heterojunctions compared to bare BW. Therefore, the composite catalytic substances demonstrated superior efficacy than bare BW towards PCr of NTr. Specifically, the photocatalyst 1.0 % PdO/BW could completely transform of NTr into ANi within only 40 min of visible light illumination. This promising heterojunction displayed an enhanced rate constant of 0.0608 min^–1, outperforming that achieved on bare BW by about 2.8 times. Our innovative heterojunction demonstrated exceptional stability and recyclability for up to five successive runs without a remarkable reduction in photocatalytic efficacy. This contribution presents new horizons for manufacturing S-scheme heterojunctions with boosted photocatalytic abilities, opening the way for prospective improvements in a broad range of significant applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113609"},"PeriodicalIF":5.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced early hydration and mechanical properties of cement-based materials with exfoliated layered double hydroxide","authors":"Amr Meawad ,&nbsp;Omar Soliman ,&nbsp;Ippei Maruyama ,&nbsp;Saber Ibrahim","doi":"10.1016/j.materresbull.2025.113608","DOIUrl":"10.1016/j.materresbull.2025.113608","url":null,"abstract":"<div><div>This study investigates the preparation and performance of ExLDH, synthesized from Ca-Al layered double hydroxide (Ca-Al LDH) and polymethylmethacrylate (PMMA), as a cement additive to accelerate early hydration and enhance early strength in cement-based materials. The synthesized Ca-Al/PMMA LDH was characterized using X-ray diffraction (XRD), ATR-FTIR, SEM, TEM, BET surface area analysis, and dynamic light scattering (DLS). The composite incorporated into Portland cement at 1, 2, and 3 wt. % concentrations. Isothermal calorimetry assessed hydration heat over 72 h, while microstructural evaluation employed QXRD, ATR-FTIR, TGA-DTA, SEM, and water vapor sorption tests. Mechanical properties were evaluated through compressive and flexural strength tests.</div><div>Results confirmed the successful fabrication of ExLDH micro/nano-composites, which serve a dual role in the cement matrix: acting as nucleation sites for hydrated phases and as void fillers to improve structural compaction. This dual effect accelerates hydration, increases hydrated phase content, and significantly enhances compressive strength and structural density.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113608"},"PeriodicalIF":5.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal neutrons-gamma rays dual-function glass shield of boron-tungsten-reinforced borosilicate glass","authors":"Dalal Abdullah Aloraini ,&nbsp;Aly Saeed","doi":"10.1016/j.materresbull.2025.113606","DOIUrl":"10.1016/j.materresbull.2025.113606","url":null,"abstract":"<div><div>A versatile glass shield for gamma rays and thermal neutrons was developed by incorporating boron and tungsten into 20SiO₂-(20+<em>x</em>)B₂O₃-(60–4x)Na₂O-3xWO₃ (<em>x</em> = 5, 10, and 15 mol %) (BSiW series). This study harnesses the synergistic effect of B₂O₃ and WO₃ to enhance mechanical, thermal, optical, and shielding properties for nuclear applications. Structural effects of increased B₂O₃ and WO₃ concentrations were explored, revealing the critical role of W⁶⁺/W⁴⁺ ions and the BO₃/BO₄ ratio in enhancing rigidity and thermal stability. The BSiW glasses demonstrated high transparency. Incorporating 45 and 35 mol % of WO₃ and B₂O₃ enhanced the attenuation of 1173.23 keV and 1332.51 keV gamma rays by 83.4 % and 110.4 % and thermal neutron by 237.1 %. Gamma irradiation at 25–75 kGy decreased transmittance up to 50 kGy; however, WO₃-containing compositions showed partial recovery at 75 kGy. The combined thermal, mechanical, and radiation resistance makes BSiW glasses with high B₂O₃ and WO₃ content ideal for shielding.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113606"},"PeriodicalIF":5.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into structural and electronic properties of low cost oxygen-deficient alumina films","authors":"Aleksandra Przybyła,&nbsp;Paulina Powroźnik,&nbsp;Marcin Wojtyniak,&nbsp;Maciej Krzywiecki","doi":"10.1016/j.materresbull.2025.113605","DOIUrl":"10.1016/j.materresbull.2025.113605","url":null,"abstract":"<div><div>Current trends in materials science are focused on two main branches: lowering costs and enhancing performance. A new, cost-efficient synthesis of the sol-gel-based spin-coat fabrication of oxygen-deficient alumina thin films is presented, achieving Al/O molar ratio of approximately 1.0. This technology produces approximately 50 nm-thick smooth layers even at low spin rates, reducing manufacturing costs while maintaining high-quality layers. Moreover, the spin rate is shown to control grain size (c.a. 2 nm) effectively, influencing the surface topography, as well as the chemical and electronic properties of the layers. The analysis of the above properties was done by mutually comprehensive experimental techniques: photoelectron spectroscopies in UV and X range, as well as atomic force microscopy and spectroscopic ellipsometry. The XPS data were cross-checked with density functional theory calculations to ensure accurate interpretation. Oxygen vacancies were identified as crucial in tuning the electronic structure, highlighting their importance for wide-bandgap semiconductor applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113605"},"PeriodicalIF":5.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal stability and oxidation resistance of single-digit boron-doped nanodiamonds","authors":"E.A. Ekimov ,&nbsp;A.A. Shiryaev ,&nbsp;T.B. Shatalova ,&nbsp;K.I. Maslakov ,&nbsp;S.G. Lyapin ,&nbsp;K.M. Kondrina ,&nbsp;Y.V. Grigoriev ,&nbsp;S. Stehlik ,&nbsp;M.V. Kondrin","doi":"10.1016/j.materresbull.2025.113604","DOIUrl":"10.1016/j.materresbull.2025.113604","url":null,"abstract":"<div><div>Single-digit boron-doped nanodiamonds (SD-BND) are potentially promising for use in various applications, including medicine, energy storage, and electronic devices. However, thermal stability and oxidation resistance of SD-BND remains unexplored, hindering their practical application and development of production methods. In this study, we investigate thermal stability in vacuum of SD-BND in comparison with larger BND, both synthesized by pyrolysis of 9-borabicyclo(3.3.1)nonane under high pressures, and with detonation nanodiamonds (DND). <em>In situ</em> X-ray phase analysis shows that the thermal stability of 4.5 nm SD-BND is comparable to that of 4.5 nm DND, since graphitization is observed at 1000 °C in both cases, and inferior to the stability of 30 nm BND. The oxidation resistance of SD-BND was studied in comparison with DND. In contrast to the widely accepted assumption that boron doping increases the oxidative resistance of diamonds, the oxidation of the 4.5 nm SD-BND in air begins ∼100 °C earlier than 4.5 nm DND. Density functional theory (DFT) calculations indicate that the presence of a boron impurity promotes nanodiamond oxidation. As detected by Raman spectroscopy, the boron impurity state remains largely unchanged during heat treatment at 550 °C in air despite the instability of SD-BND in an oxidizing atmosphere. This study delineates field of SD-BND stability upon heating in vacuum and in air, which is important for practical applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113604"},"PeriodicalIF":5.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of volumetric energy densities on the mechanical properties of stainless steel 310 fabricated through selective laser melting","authors":"R. Nandhakumar,&nbsp;K. Venkatesan","doi":"10.1016/j.materresbull.2025.113592","DOIUrl":"10.1016/j.materresbull.2025.113592","url":null,"abstract":"<div><div>Additive manufacturing (AM) produces lightweight, durable, and intricate forms, whereas selective laser melting (SLM) uses laser energy to melt metal powder layers, creating almost dense components. The volumetric energy density (VED) is a crucial factor in evaluating consolidation with unfused or unmelted LPBF particles and is affected by the laser power, scan speed, scan spacing, and layer thickness. This study investigated the impact of VED ranging from 74.67 J/mm³ to 178.57 J/mm³ on the morphology and mechanical properties of the SS 310 samples, specifically their hardness and tensile strength. The top residual stresses (TRS) were greater than those on the lateral surfaces (LRS). The results also revealed that VED significantly influences recrystallisation, reducing VED by decreasing the dislocation density. High VED reduces porosity and defects, increasing part of the density. As the VED increased, the as-built samples exhibited an austenite phase and larger columnar grains. The hardness of the samples ranges from 280.4±3.81 (S1) to 300.8±4.34 HV (S24), with an increase due to reduced void formation, whereas pores allow deeper penetration, resulting in lower HV values. The ultimate tensile strength (UTS) ranged from 768.55±5.34 MPa (S25) to 854.57±2.73 MPa (S3), whereas the tensile ductility ranged from 4.72% to 12.08%. The difference was 10% between the highest and lowest UTS values. The decrease in VED resulted in increased defects, which affected elongation. Fractography revealed defects causing premature failure of the SS310 samples, with internal defects influencing crack propagation and decreasing mechanical properties. The most suitable VED range for achieving a maximum hardness of 300.8±4.34 HV (S24) and the highest UTS of 854.57±2.73 MPa (S3) with 7.4% elongation were 125 J/mm³ and 91.26 J/mm³, respectively.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113592"},"PeriodicalIF":5.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly carbon dots for smart materials: A sustainable approach to forensics, biopolymer films, and UV-blocking applications","authors":"D.H. Sandeep ,&nbsp;B.R. Radha Krushna ,&nbsp;Shih-Lung Yu ,&nbsp;Bing-Li Lyu ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;S.C. Sharma ,&nbsp;J.B. Prasanna Kumar ,&nbsp;Liza Mohapatra ,&nbsp;C. Krithika ,&nbsp;K. Manimekalai ,&nbsp;Augustine George ,&nbsp;H. Nagabhushana","doi":"10.1016/j.materresbull.2025.113596","DOIUrl":"10.1016/j.materresbull.2025.113596","url":null,"abstract":"<div><div>We report the synthesis of red-emissive carbon dots (SCDs) from <em>Spinach</em> leaves via a hydrothermal method. These SCDs exhibit strong red photoluminescence (PL), high quantum yield (QY), and excellent stability. Their unique optical features allow clear visualization of latent fingerprints (LFPs) and latent lip prints (LLPs), offering a sensitive and practical forensic tool. Incorporated into polyvinyl alcohol (PVA) films, the SCDs form flexible nanocomposites (NCs) with UV-blocking properties that extend food shelf life by minimizing moisture loss and microbial growth, as shown in strawberry preservation tests. SCDs serve as fluorescent inks for anti-counterfeiting (AC), generating patterns visible only under UV light for secure data encryption. Cytotoxicity assays confirm their biocompatibility, supporting safe application in consumer and biomedical products. The environmental friendliness of SCDs highlights their potential for diverse applications in security, food safety, and materials science. Future research will focus on expanding the scope of SCDs in emerging technological fields.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113596"},"PeriodicalIF":5.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poplar wood-derived carbon-based electrocatalysts for improving liquid and flexible quasi-solid zinc-air batteries","authors":"Zhicong Wang,&nbsp;Hongjiao Chen,&nbsp;Shengyue Zhang,&nbsp;Luyao Zhang,&nbsp;Yijun Miao,&nbsp;Hao Ding,&nbsp;Bin Hui","doi":"10.1016/j.materresbull.2025.113594","DOIUrl":"10.1016/j.materresbull.2025.113594","url":null,"abstract":"<div><div>Developing bifunctional oxygen reduction/evolution reactions (ORR/OER) electrocatalysts is crucial for improving the performances of rechargeable zinc-air batteries (ZABs). Herein, a poplar wood-derived Fe-N/Fe₃C@N, S-doped carbon (Fe-N/Fe₃C@NSC) was proposed as ORR/OER catalysts to enhance ZABs performances. The abundant channels and numerous micro-/mesopores of wood facilitated the transport of gas/electrolyte and electron transfer. The resultant Fe-N/Fe₃C@NSC had a high half-wave potential (<em>E</em>_1/2) of 0.85 V. The Fe-N and Fe₃C nanoparticles acted as the main active sites to enhance the adsorption and activation capacity, reducing the energy barrier of reaction intermediates. Thiophene S regulated electron rearrangement around Fe-N, increasing the density of Fe-N sites and improving the intrinsic activity. The assembled liquid and quasi-solid-state ZABs demonstrated a maximum power density of 197 and 64 mW cm^-2, maintaining a prolonged cycling. This work presents a poplar wood-derived bifunctional carbon-based electrocatalyst to boost ZABs performance, offering significant guidance in energy storage and conversion.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113594"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Evaluating electrochemical performance of magnetron sputtered binder free zirconium nitride thin film for hybrid supercapacitor in various electrolytes” [Materials Research Bulletin 186 (2025) 113323]","authors":"Muhammad Zahir Iqbal ,&nbsp;Hamza Muzahir Shah ,&nbsp;Rashid Ali ,&nbsp;Subhash Chandra ,&nbsp;Waqas Shoukat ,&nbsp;Abhinav Kumar ,&nbsp;Vijayalaxmi Mishra ,&nbsp;Sumit Kaushal ,&nbsp;Saikh Mohammad Wabaidur","doi":"10.1016/j.materresbull.2025.113558","DOIUrl":"10.1016/j.materresbull.2025.113558","url":null,"abstract":"","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113558"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144204766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulating carrier transfer and performance in dye-sensitized solar cells (DSSCS) using gamma-irradiated chitosan@pva@al2o3 nanocomposites as a counter electrode","authors":"M.A. Sebak ,&nbsp;A.K. Aladim ,&nbsp;Fatma Gami ,&nbsp;M.M. Mostafa ,&nbsp;Osama R. Shahin ,&nbsp;M.Abdelhamid Shahat","doi":"10.1016/j.materresbull.2025.113593","DOIUrl":"10.1016/j.materresbull.2025.113593","url":null,"abstract":"<div><div>This study investigates the use of gamma-irradiated Chitosan@PVA@Al₂O₃ (CPA) composites as counter electrodes (CEs) to enhance charge transfer and efficiency in dye-sensitized solar cells (DSSCs). CPA films were exposed to in-situ gamma irradiation at dosages ranging from 0 to 30 KGy to optimize their physicochemical and microstructural features. The effect of gamma irradiation on the structural and morphological features of the composite, as well as its influence on the charge transfer resistance and photovoltaic performance of DSSCs, was extensively studied. The SEM micrographs reveal changes in surface morphology and porosity as the irradiation dose increases. The surface features of the irradiated CE hybrids also gradually enhanced as the gamma dosage increased, reaching the desired levels at 25 KGy (average roughness (Ra) = 7.87 µm, apparent porosity = 79.4 %, and bulk density = 1.68 g/cm³). The interaction of high-energy gamma photons created promising conditions for charge separation, minimizing recombination and enhancing charge carrier mobility within the CPA composites. These improvements in mobility and the reduction of resistive losses contributed to an extended cell lifespan and more efficient charge transfer. Interestingly, surface modification at 25 KGy resulted in an optimized efficiency of 8.25 % and a short-circuit photocurrent density (J_sc) of 18.056 mA/cm², reflecting a 37.76 % increase compared to the untreated sample. This enhancement in photovoltaic performance is attributed to the generation of oxygen-enriched free radicals within the CPA structure, which facilitated the formation of continuous pathways for efficient electron transport. This work highlights the pivotal role of gamma-irradiated CPA catalytic CEs in advancing DSSC performance and presents a novel strategy for enhancing the efficiency of these devices.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"192 ","pages":"Article 113593"},"PeriodicalIF":5.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}