Materials Research Bulletin最新文献_第10页

Influence of Nb5+ ions on the dielectric properties of CaCu3Ti4O12 ceramics Nb5+离子对cuu3ti4o12陶瓷介电性能的影响

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-26 DOI: 10.1016/j.materresbull.2025.113405

M. Ehthishamul Haque , S. Divya , S. Cathrin Lims , R. Robert , C. Justin Raj , M. Jose

引用次数: 0

Entropy engineering stimulates the thermoelectric performance of FeCoNiAlSix high-entropy alloys 熵工程刺激feconial6高熵合金的热电性能

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-26 DOI: 10.1016/j.materresbull.2025.113404

Cheenepalli Nagarjuna , Hansung Lee , Sheetal Kumar Dewangan , Babu Madavali , Ashutosh Sharma , Byungmin Ahn

{"title":"Entropy engineering stimulates the thermoelectric performance of FeCoNiAlSix high-entropy alloys","authors":"Cheenepalli Nagarjuna , Hansung Lee , Sheetal Kumar Dewangan , Babu Madavali , Ashutosh Sharma , Byungmin Ahn","doi":"10.1016/j.materresbull.2025.113404","DOIUrl":"10.1016/j.materresbull.2025.113404","url":null,"abstract":"<div><div>The present study explores the role of entropy engineering on thermoelectric properties of FeCoNiAlSix high entropy alloys (HEAs) as a function of Si content. The addition of Si content increased mixing entropy, and reduces valance electron concentration, leading to phase transition from dual FCC+BCC phase to single BCC phase. With increasing Si content, the Seebeck coefficient increases due to a reduction in carrier concentration and an increase in effective mass. The lowest lattice thermal conductivity of 1.202 W/m∙K was obtained at 700 K for the FeCoNiAlSi0.6 HEA due to strong phonon scattering induced by lattice distortion. As a result, a maximum figure of merit, ZT ∼ 0.016 was achieved at 700 K for the FeCoNiAlSi0.6 HEA. In addition, the hardness of HEAs effectively increased from 520±10 to 740±10 HV with Si content. Therefore, entropy engineering is found to be a promising method to enhance thermoelectric and mechanical performance as well.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113404"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549101","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}

引用次数: 0

Multiple site occupancies of Eu3+ in differently oriented ZnMgO:Eu epilayers 不同取向ZnMgO:Eu涂层中Eu3+的多位点占位

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-26 DOI: 10.1016/j.materresbull.2025.113403

Juby Alphonsa Mathew, Aleksandra Wierzbicka, Rafal Jakiela, Yaroslav Zhydachevskyy, Anastasiia Lysak, Marcin Stachowicz, Adrian Kozanecki

{"title":"Multiple site occupancies of Eu3+ in differently oriented ZnMgO:Eu epilayers","authors":"Juby Alphonsa Mathew, Aleksandra Wierzbicka, Rafal Jakiela, Yaroslav Zhydachevskyy, Anastasiia Lysak, Marcin Stachowicz, Adrian Kozanecki","doi":"10.1016/j.materresbull.2025.113403","DOIUrl":"10.1016/j.materresbull.2025.113403","url":null,"abstract":"<div><div>ZnMgO:Eu epilayers were grown on polar c-plane and non-polar r-plane Al2O3 substrates via oxygen plasma-assisted molecular beam epitaxy. The effect of crystal orientation on the luminescence properties is investigated in the as-grown and annealed ZnMgO:Eu crystals. The structural characteristics were accurately evaluated using the symmetrical and asymmetrical reciprocal space maps of high-resolution XRD measurements. Photoluminescence (PL), PL excitation properties and PL decay kinetics were studied at room- and low- temperatures. Regardless of the crystal orientation, annealed ZnMgO:Eu epilayers exhibit an intense Eu3+ red emission boosted by efficient host-to-dopant energy transfer and charge transfer mechanisms. However, ZnMgO:Eu/r-Al2O3 presents intrinsic defect luminescence centres, relatively quenching Eu3+ PL. Multiple emission lines are identified in the 5D0 to 7FJ=0 transition range. PL decay kinetics of Eu3+ showcases a long luminescence lifetime and multi-exponential behaviour under resonant and non-resonant excitations. Temperature-dependent luminescence analyses confirm multiple site occupancies of Eu3+ in ZnMgO.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113403"},"PeriodicalIF":5.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547997","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}

引用次数: 0

Investigation of photocatalytic activity of Fe, Co, Zn substituted polyoxometalates/magnetite MCM-41 for degradation of organic dyes in aqueous solutions Fe, Co， Zn取代多金属氧酸盐/磁铁矿MCM-41光催化降解水中有机染料的活性研究

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-25 DOI: 10.1016/j.materresbull.2025.113368

Robabeh Hajian, Fatemeh Dashti Rahmatabadi

{"title":"Investigation of photocatalytic activity of Fe, Co, Zn substituted polyoxometalates/magnetite MCM-41 for degradation of organic dyes in aqueous solutions","authors":"Robabeh Hajian, Fatemeh Dashti Rahmatabadi","doi":"10.1016/j.materresbull.2025.113368","DOIUrl":"10.1016/j.materresbull.2025.113368","url":null,"abstract":"<div><div>In this study, three polyoxometalates of substituted Keggin-type [(n-C4H9)4 N)]5PMo2W9O39 (X2+.OH2). nH2O (X; Fe, Co, Zn), FePOM, CoPOM, and ZnPOM were synthesized and individually immobilized on a magnetite MCM-41 support (FeMCM-41). The resulting catalysts were characterized using various methods, including FTIR, DR UV–Vis, XRD, FESEM, EDX, texture analysis (BET), and ICP. TEM images showed spherical particles, mesoporous FeMCM-41, and FeMCM-41@FePOM agglomeration. BET showed a type IV isotherm (mesoporous), 373.5 m²/g surface area, and 10.1 nm pore diameter. The photocatalytic performance of the heterogeneous catalysts (FeMCM-41@XPOM) was evaluated by the degradation of the cationic dyes methylene blue (MB) and rhodamine B (RhB) under visible light irradiation. The kinetics model for dye degradation was controlled by first-order reactions according to the Langmuir-Hinshelwood equation. The photocatalytic degradation activity of the heterogeneous species was superior to that of the homogeneous species. The dye degradation rate of the obtained materials followed the order of FeMCM-41@FePOM > FeMCM-41@CoPOM > FeMCM-41@ZnPOM. This work achieved 98 % MB degradation in 50 min and 97 % RhB degradation in 40 min using 5 mg of the FeMCM-41@FePOM catalyst under 100 W white LED light. This performance is comparable to other catalysts (support@POM, where the support is magnetite, TiO2, or ZnO), some of which require longer times or higher catalyst loadings. In addition, these systems can be easily separated with an external magnet and reused in four catalytic cycles with a slight reduction in performance.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113368"},"PeriodicalIF":5.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512084","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}

引用次数: 0

Tailoring structure, optical absorption, and dielectric performance in Mn-doped La2NiRu1-xMnxO6 double perovskites mn掺杂La2NiRu1-xMnxO6双钙钛矿的裁剪结构、光吸收和介电性能

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-25 DOI: 10.1016/j.materresbull.2025.113402

M.S.M. Rafie , A.M. Mahat , M.Z.M. Halizan , Z. Mohamed

{"title":"Tailoring structure, optical absorption, and dielectric performance in Mn-doped La2NiRu1-xMnxO6 double perovskites","authors":"M.S.M. Rafie , A.M. Mahat , M.Z.M. Halizan , Z. Mohamed","doi":"10.1016/j.materresbull.2025.113402","DOIUrl":"10.1016/j.materresbull.2025.113402","url":null,"abstract":"<div><div>This study delves into the structural, optical, and dielectric characteristics of Mn-doped La2NiRu1-xMnxO6 (x = 0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) double perovskites, synthesized using a solid-state reaction method. X-ray diffraction (XRD) results revealed that adding Mn leads to changes in the crystal structure, causing lattice distortions indicated that all samples possess a monoclinic unit cell in the P21/n space group. FTIR spectroscopy confirmed the formation of Ni-O-Ru and Ni-O-Mn bonds confirming the molecular bands on the perovskite oxide structure for all samples, which significantly influence the material's optical and dielectric performance. As the level of Mn doping increased, the band gap values decrease gradually, enhancing the material's light absorption capabilities and making it a strong candidate for optoelectronic applications. Additionally, dielectric analysis showed that Mn incorporation improved both polarization and dielectric constants, suggesting potential for use in capacitors and energy storage devices. Overall, this research highlights how Mn doping not only impacts the structural stability of La2NiRu1-xMnxO6 (x = 0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) but also allows for the precise adjustment of its optical and dielectric properties, expanding its potential in electronic and optoelectronic applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113402"},"PeriodicalIF":5.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512082","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}

引用次数: 0

Unveiling the contribution mechanism and the role of oxygen vacancies in the simultaneous electrochemical sensing of ceftriaxone and diclofenac by CPE/zeolite 揭示了氧空位在CPE/沸石对头孢曲松和双氯芬酸同时电化学传感中的贡献机制和作用

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-23 DOI: 10.1016/j.materresbull.2025.113398

Amir Khosravi-Hamoleh , Raziyeh Taban , Mohsen Cheraghizade

{"title":"Unveiling the contribution mechanism and the role of oxygen vacancies in the simultaneous electrochemical sensing of ceftriaxone and diclofenac by CPE/zeolite","authors":"Amir Khosravi-Hamoleh , Raziyeh Taban , Mohsen Cheraghizade","doi":"10.1016/j.materresbull.2025.113398","DOIUrl":"10.1016/j.materresbull.2025.113398","url":null,"abstract":"<div><div>This study introduces a carbon paste electrode modified with zeolite (CPE/zeolite) as an effective electrochemical sensor for the simultaneous detection of Ceftriaxone (Cef) and Diclofenac (Dic). The sensor's performance was evaluated in a mixed supporting electrolyte of 0.1 M phosphoric acid and 0.1 M sodium hydroxide. The role of oxygen vacancies (Ov) in electrochemical sensing was investigated. Under optimized conditions, the sensor demonstrated excellent sensitivity with a linear detection range of 1–100 µM for both analytes and limits of detection (LOD) of 1 µM for Cef and Dic. The CPE/zeolite sensor showed reliable recovery rates (97.8–99.2 %) in real human blood and urine samples. This study highlights the significant role of zeolite in enhancing electrode performance by providing a high surface area and facilitating charge transfer through Ov-mediated mechanisms. The CPE/zeolite sensor offers a cost-effective, stable, and sensitive platform for real-time pharmaceutical monitoring and environmental applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113398"},"PeriodicalIF":5.3,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548003","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}

引用次数: 0

Microwave-assisted hydrothermal synthesis of Sm2O3@ZnO nanohybrid for photo-oxidation of flavonoid 微波辅助水热合成Sm2O3@ZnO光氧化类黄酮纳米杂化物

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-23 DOI: 10.1016/j.materresbull.2025.113399

Pitchaimani Veerakumar , Rajaram Pandiyan , Shen-Ming Chen

{"title":"Microwave-assisted hydrothermal synthesis of Sm2O3@ZnO nanohybrid for photo-oxidation of flavonoid","authors":"Pitchaimani Veerakumar , Rajaram Pandiyan , Shen-Ming Chen","doi":"10.1016/j.materresbull.2025.113399","DOIUrl":"10.1016/j.materresbull.2025.113399","url":null,"abstract":"<div><div>Samarium oxide-decorated on zinc oxide nanorods (Sm2O3@ZnONRs) nanohybrid was prepared using the microwave-assisted hydrothermal (MW-HT) method and utilized for the visible light (VL) driven photo-oxidtion of flavonoid (MR: morin). It exhibits optical energy gap (Eg) ca. ∼2.57 eV compared to ZnONRs (Eg: ∼3.25 eV). The reduced Eg of nanohybrid is favourable for the VL harvesting and the tight interface of Sm2O3 and ZnONRs strengthen the transfer and mobility of charge carries, leading to the high resistance to the recombination of photo-induced electron (h+/e−) pairs. Particularly, the nanohybrid yielded 98.8 % degradation of MR in 60 s and the rate constant (k) 0.0244 s−1, which was 3.2, 2.9, and 1.9 times faster than commercial ZnO, Sm2O3, and ZnONRs. The significant MR photo-oxidation can be related to synergetic effect and the inhibition of charge–carrier recombination system. Moreover, the good results provide an important guidance for the various flavonoids oxidation applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113399"},"PeriodicalIF":5.3,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534175","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}

引用次数: 0

Polymorphism of Whitlockite-Type Phosphors Ca9–1.5xZnMeEux(PO4)7 and Enhancement of Eu3+ Luminescence with Me = Li, Na whitlockite型荧光粉Ca9-1.5xZnMeEux (PO4)7的多态性及Me = Li， Na对Eu3+发光的增强

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-22 DOI: 10.1016/j.materresbull.2025.113396

Bogdan I. Lazoryak , Sergey Yu. Stefanovich , Vladimir V. Titkov , Alexander V. Mosunov , Ivan V. Nikiforov , Maria I. Kharovskaya , Elizaveta A. Pankrushina , Stanislav P. Kubrin , Dina V. Deyneko

{"title":"Polymorphism of Whitlockite-Type Phosphors Ca9–1.5xZnMeEux(PO4)7 and Enhancement of Eu3+ Luminescence with Me = Li, Na","authors":"Bogdan I. Lazoryak , Sergey Yu. Stefanovich , Vladimir V. Titkov , Alexander V. Mosunov , Ivan V. Nikiforov , Maria I. Kharovskaya , Elizaveta A. Pankrushina , Stanislav P. Kubrin , Dina V. Deyneko","doi":"10.1016/j.materresbull.2025.113396","DOIUrl":"10.1016/j.materresbull.2025.113396","url":null,"abstract":"<div><div>Powders and ceramics with whitlockite-type structure are synthesized using the solid-state method in novel Ca9–1.5xZnMeEux(PO4)7 (Me = Li, Na) series, 0 ≤ x ≤ 1. The substances are divided to centro- and non-centrosymmetric by optical second harmonic investigation. There are non-centrosymmetry at x ≤ 0.3 and centrosymmetry at x ≥ 0.9, while at 0.3 < x < 0.9 they coexist. With differential scanning calorimetry and dielectric measurements, the reversible transformations in sequence R3c ↔ R<math><mover><mn>3</mn><mo>¯</mo></mover></math>c ↔ R<math><mover><mn>3</mn><mo>¯</mo></mover></math>m are observed and new phase transitions were found. At room temperature, photoluminescence spectroscopy and the Mössbauer effect on 151Eu nuclei pointed to reducing of number of Eu3+ non-equivalent positions from n = 3 in the phase R3c (x ≤ 0.3) to n = 2 in R<math><mover><mn>3</mn><mo>¯</mo></mover></math>c at x = 1. The less positions for Eu3+ resulted in well-shaped luminescence spectra of increased intensity. Rietveld refinement evidenced that alkali atoms are settled in some extraordinal positions impeding Ca2+ ions hopping. This is consistent with the observed drop in ionic conductivity and better luminescence, probably, due to weakening of Eu3+ nonradiative phonon deactivation.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113396"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526750","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}

引用次数: 0

Luminescent sensing of Hg²⁺ ions using MOF-808 combined with Au25@BSA nanoclusters MOF-808结合Au25@BSA纳米团簇对Hg +离子的发光传感

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-22 DOI: 10.1016/j.materresbull.2025.113397

L.G. Barbata , M. Mazaj , R. Ettlinger , G. Ficarra , P. Castronovo , A. Sciortino , F. Messina , R.E. Morris , G. Buscarino

{"title":"Luminescent sensing of Hg²⁺ ions using MOF-808 combined with Au25@BSA nanoclusters","authors":"L.G. Barbata , M. Mazaj , R. Ettlinger , G. Ficarra , P. Castronovo , A. Sciortino , F. Messina , R.E. Morris , G. Buscarino","doi":"10.1016/j.materresbull.2025.113397","DOIUrl":"10.1016/j.materresbull.2025.113397","url":null,"abstract":"<div><div>The detection of Hg²⁺ ions in aqueous environments is crucial due to their environmental toxicity and potential health risks. In this study, we present a novel luminescent sensor based on Metal-Organic Framework MOF-808 functionalized with Au25@BSA gold nanoclusters (AuNCs) for the highly sensitive detection of trace Hg²⁺ ions. MOF-808, known for its robust structure and versatile chemical environment, provides an ideal platform for incorporating gold nanoclusters that exhibit unique optical properties. The integration of Au25@BSA in MOF-808 framework enhances the temporal and thermal stability of the gold nanoclusters while preserving their photoluminescence properties. The MOF-808/Au25@BSA composite behaves as a sensor relying on the quenching effect of Hg²⁺ on the luminescence of the gold nanoclusters embedded within the MOF matrix, offering a highly selective and sensitive detection method at concentrations as low as nM levels. Comprehensive characterizations of the MOF-808/Au25@BSA composite were conducted. This sensor demonstrates remarkable performance with high sensitivity, selectivity, and stability, making it a promising tool for environmental monitoring and analysis. This work highlights the potential of MOF-based luminescent sensors combined with gold nanoclusters in advancing the field of sensing applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"188 ","pages":"Article 113397"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-friendly carbon quantum dots as a bi-functional fluorescent probe for Cr (VI) detection and optical thermometry 生态友好型碳量子点作为双功能荧光探针，用于检测六价铬和光学温度计

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-02-21 DOI: 10.1016/j.materresbull.2025.113394

Avinash Kumar , Ritu , Ishant Kumar , Sandeep Kumar , Arvind K Gathania

引用次数: 0