Materials Science and Engineering: B最新文献_第2页

Solvent-assisted direct recycling of Li4Ti5O12 anodes for sustainable lithium-ion battery production 溶剂辅助直接回收用于可持续锂离子电池生产的Li4Ti5O12阳极

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-20 DOI: 10.1016/j.mseb.2026.119224

Chui-Chang Chiu , Wen-Chia Hsu , Chung-Chieh Chang , Yu-Cheng Chiu

Lithium titanate (Li₄Ti₅O₁₂, LTO) anodes are widely used in energy storage systems, yet their efficient recycling remains challenging due to the high energy demand and complexity of conventional processes. This study presents a solvent-assisted direct recycling strategy for LTO anodes recovered from three representative sources: commercial powders, electrode manufacturing scrap, and cycle-aged cells. The process employs sequential N-methyl-2-pyrrolidone (NMP) and ethanol treatments followed by low-temperature vacuum drying (≤110 °C), thereby eliminating high-temperature calcination while preserving the spinel structure. Structural and morphological characterizations confirm that the LTO spinel framework is largely retained after recycling, with only minor source-dependent variations in lattice parameters and particle morphology. Scrap-derived LTO exhibits particle-size distributions, thermal stability, and electrochemical behavior comparable to those of commercial LTO. In contrast, LTO recovered from cycle-aged cells shows increased surface-related degradation and interfacial resistance, leading to reduced rate capability and capacity retention. Notably, all recycled materials maintain a stable voltage plateau at approximately 1.55 V vs. Li⁺/Li, indicating preservation of the intrinsic lithium intercalation mechanism. To address performance degradation in recycled materials, a compositional blending strategy combining recycled and commercial LTO is investigated. Blended electrodes demonstrate improved rate performance and cycling stability compared with recycled LTO alone. Overall, this work provides a manufacturing-relevant evaluation of solvent-assisted direct recycling for LTO anodes and offers practical guidance for reuse-oriented implementation in lithium-ion battery systems.

钛酸锂（Li4Ti5O12， LTO）阳极广泛应用于储能系统，但由于其高能量需求和传统工艺的复杂性，其有效回收仍然具有挑战性。本研究提出了一种溶剂辅助的直接回收策略，用于从三个代表性来源回收的LTO阳极：商业粉末，电极制造废料和循环老化电池。该工艺采用连续n -甲基-2-吡咯烷酮（NMP）和乙醇处理，然后进行低温真空干燥（≤110℃），从而在保留尖晶石结构的同时消除了高温煅烧。结构和形态表征证实，LTO尖晶石骨架在回收后大部分被保留，晶格参数和颗粒形态只有轻微的源依赖性变化。废料衍生的LTO表现出与商业LTO相当的粒度分布、热稳定性和电化学行为。相比之下，从循环老化的细胞中恢复的LTO显示出增加的表面相关降解和界面阻力，导致速率能力和容量保持能力降低。值得注意的是，所有的回收材料都保持了一个稳定的电压平台，大约在1.55 V vs. Li+/Li，表明保留了固有的锂嵌入机制。为了解决回收材料性能下降的问题，研究了一种将回收材料与商业LTO相结合的复合混合策略。与单独回收LTO相比，混合电极具有更好的倍率性能和循环稳定性。总的来说，这项工作为LTO阳极的溶剂辅助直接回收提供了与制造相关的评估，并为锂离子电池系统中面向再利用的实施提供了实用指导。

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引用次数: 0

Crystal growth of CdZnO thin films: a combined numerical and experimental study in a two-inlet horizontal MOCVD reactor CdZnO薄膜的晶体生长：双入口水平MOCVD反应器中数值与实验相结合的研究

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-20 DOI: 10.1016/j.mseb.2026.119207

Javier Yeste, Vicente Muñoz-Sanjosé

This work presents a combined numerical and experimental study of Cd₁₋ₓZnₓO thin film growth in a two-inlet horizontal MOCVD reactor. A three-dimensional model was used to analyse flow patterns, temperature fields, and precursor transport, enabling a direct comparison between helium and nitrogen as carrier gases. It was determined that helium produces smooth, centrally directed longitudinal flow, higher diffusion coefficients, and more uniform temperature fields, but results in larger film composition variations. In contrast, nitrogen induces longitudinal convective rolls that generate heterogeneous temperature zones, enhanced convective mixing, and a reduced effective boundary-layer thickness, leading to smoother zinc composition gradients at the expense of sharper thickness variations. These trends were experimentally validated through the deposition of CdZnO films on 2-in. r-sapphire substrates and the spatial characterization of their thickness and composition.

本文介绍了在双入口水平MOCVD反应器中Cd₁ₓZnₓO薄膜生长的数值和实验研究。三维模型用于分析流动模式、温度场和前体输运，从而可以直接比较氦气和氮气作为载气的情况。结果表明，氦能产生平滑的、集中定向的纵向流动、较高的扩散系数和更均匀的温度场，但导致膜成分变化较大。相反，氮诱导纵向对流卷产生非均匀温度区，增强对流混合，减少有效边界层厚度，导致锌成分梯度更平滑，而厚度变化则更剧烈。这些趋势通过在2-in表面沉积CdZnO薄膜得到了实验验证。r-蓝宝石衬底及其厚度和组成的空间表征。

引用次数: 0

Femtosecond-laser-induced highly regular grating nanostructures: Spatiotemporal control routes for near-field enhancement on metallic glass surfaces 飞秒激光诱导的高规则光栅纳米结构：金属玻璃表面近场增强的时空控制路径

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-19 DOI: 10.1016/j.mseb.2026.119206

Shijie Song , Peilei Zhang , Weilin Zhang , Kefan Chen , Lingxiao Song , Qingyun Yang , Hanxuan Huang , Keran Jiang , Guanglong Chen , Tianzhu Sun , Xia Ruan , Chao Fang

Leverage the flexible pulse splitting of femtosecond laser burst mode (BM) and the ultra-short time scale burst delay to increase the pulse count for creating efficient, high-quality, and highly regular laser-induced periodic surface structures (HR-LIPSS) on zirconium-based metallic glass (Zr-BMG). HR-LIPSS have subwavelength periodicity and quasi-regular nanopatterns aligned along the direction of the laser polarization with a period of 505 nm. This paper uses a combination of Maxwell's system of equations, electron-ion heat conduction effect, Navier-Stokes equations, and numerical analysis of the material removal process. It aims to reveal the complex kinetic process of laser-material interaction, especially the key mechanism of action in forming laser-induced periodic surface structures (LIPSS). The simulation outcomes closely align with the experimental data regarding the development trend and periodicity of the LIPSS structures, validating the accuracy of the simulation model. This consistency validates the accuracy of the simulation method and provides strong theoretical support for experimental observations, thereby deepening the understanding of the formation mechanisms of LIPSS.

利用飞秒激光爆发模式（BM）的灵活脉冲分裂和超短时间尺度爆发延迟来增加脉冲计数，从而在锆基金属玻璃（Zr-BMG）上创建高效、高质量和高度规则的激光诱导周期性表面结构（hrlipss）。HR-LIPSS具有亚波长周期性和准规则的纳米图案，沿激光偏振方向排列，周期为505 nm。本文结合麦克斯韦方程组、电子-离子热传导效应、纳维-斯托克斯方程，对材料去除过程进行数值分析。旨在揭示激光与材料相互作用的复杂动力学过程，特别是形成激光诱导周期表面结构（LIPSS）的关键作用机制。仿真结果与LIPSS结构发展趋势和周期性的实验数据吻合较好，验证了仿真模型的准确性。这种一致性验证了模拟方法的准确性，为实验观测提供了强有力的理论支持，从而加深了对LIPSS形成机制的认识。

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引用次数: 0

Bio-composites with natural, nanomaterial additives and smart manufacturing: A path to sustainable microswimmers 生物复合材料与天然，纳米材料添加剂和智能制造：可持续的微游泳者之路

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-19 DOI: 10.1016/j.mseb.2026.119213

Roopsandeep Bammidi , Hymavathi Madivada , Sreeramulu Dowluru

The design, production, and characterization procedures of completely biodegradable microswimmers using a recently created biocomposite material based on polylactic acid supplemented with graphene nanoparticles and powdered Ocimum sanctum are covered in this study. Six microswimmer prototypes were created using 4D printing, injection molding, and filament extrusion in order to compare mechanical strength, precision, thermal stability, and swimming performance. High structural integrity, form flexibility, and manufacturing precision were provided by 4D printing and filament extrusion as compared to traditional techniques. Composites' enhanced performance was confirmed by increased interfacial bonding, tensile strength, and heat resistance as a result of graphene and Ocimum sanctum alteration. The material's resilience, stability, and biocompatibility were proven by extensive characterization using methods including FTIR, SEM, TGA, DSC, and tensile and stress-strain analysis. Comparative 3D modeling helped to improve process optimization and procedure repeatability. The biocomposite has significant promise as an environmentally benign, high-performing material for ecological remediation, microfluidics, and next-generation microswimmers for biomedical devices. Future research will improve material compositions and process parameters for flexibility and multifunctional efficiency increase, while the current study establishes the foundation for biopolymer-based smart microrobotics.

本研究涵盖了完全可生物降解的微游泳器的设计、生产和表征过程，该微游泳器使用了一种基于聚乳酸、石墨烯纳米颗粒和粉末圣木的生物复合材料。为了比较机械强度、精度、热稳定性和游泳性能，使用4D打印、注塑和长丝挤出技术创建了六个微型游泳器原型。与传统技术相比，4D打印和长丝挤压提供了高结构完整性，形式灵活性和制造精度。复合材料的性能得到了增强，因为石墨烯和Ocimum的改变增加了界面结合、抗拉强度和耐热性。材料的弹性、稳定性和生物相容性通过FTIR、SEM、TGA、DSC、拉伸和应力-应变分析等方法进行了广泛的表征。对比三维建模有助于改进工艺优化和工艺可重复性。这种生物复合材料作为一种环境友好的高性能材料，在生态修复、微流体和生物医学设备的下一代微游泳器方面具有重要的前景。未来的研究将改进材料组成和工艺参数，以提高灵活性和多功能效率，而当前的研究为基于生物聚合物的智能微型机器人奠定了基础。

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引用次数: 0

Interfacial electronic modulation enables enhancement of redox kinetics in tungsten-doped NiCoLDH nanostructures for high performance supercapacitors 界面电子调制可以增强用于高性能超级电容器的钨掺杂NiCoLDH纳米结构的氧化还原动力学

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-19 DOI: 10.1016/j.mseb.2025.119173

Masood Ullah , Shakeel Ahmad , Henmei Ni , Afaq Ullah Khan , Kamran Tahir , Hassan M.A. Hassan , Sameerah I. Al-Saeedi , Zainab M. Almarhoon , Mingkun Jiang , Magdi E.A. Zaki

The present study introduces a straightforward, hydro solvothermal synthesis route for constructing W/NiCo layered double hydroxides (LDHs) nanomaterials and evaluates their suitability as supercapacitor electrodes. The electrochemical performance of the resulting nanomaterials was comprehensively examined within a supercapacitor framework. Leveraging the cooperative action of synergistic redox reactions and efficient Faradaic processes, the W/NiCoLDH system demonstrates substantial capacitive performance, achieving a specific capacitance of 1946 F g⁻¹. Additionally, a asymmetric supercapacitor (ASC) was assembled with W/NiCoLDH serving as the positive electrode and activated carbon (AC) as the negative electrode. The fabricated device delivers robust electrochemical performance, reaching an energy density of 75 Wh kg⁻¹ at a power density of 721 W kg⁻¹, retaining 84% of capacitance and exhibiting 96% coulombic efficiency after 10,000 cycles. This work outlines a feasible approach to improve the energy density of bimetallic LDH-based materials for advanced energy storage applications.

本研究介绍了一种简单的水溶剂热合成方法，用于构建W/NiCo层状双氢氧化物（LDHs）纳米材料，并评估了其作为超级电容器电极的适用性。在超级电容器框架内全面检查了所得纳米材料的电化学性能。利用协同氧化还原反应和有效的法拉第过程的协同作用，W/NiCoLDH系统表现出可观的电容性能，实现了1946 F g−1的比电容。此外，还以W/NiCoLDH为正极，活性炭（AC）为负极组装了不对称超级电容器（ASC）。该装置具有强大的电化学性能，在721 W kg - 1的功率密度下达到75 Wh kg - 1的能量密度，在10,000次循环后保持84%的电容和96%的库仑效率。这项工作概述了一种可行的方法来提高双金属ldh基材料的能量密度，用于先进的储能应用。

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引用次数: 0

Comments on “tuning electrical conductivity in lithium-doped sodium titanate via sonochemical synthesis” “通过声化学合成调整掺锂钛酸钠的电导率”评述

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-19 DOI: 10.1016/j.mseb.2026.119218

Tosapol Maluangnont

da Silva et al. (Mater. Sci. Eng. B 323 (2026) 118836) recently reported the sonochemical synthesis of lithium-doped sodium titanate Na_2-xLi_xTi₃O₇ (x = 0, 0.01, 0.02 and 0.03). They proposed three-phase products: (i) lithium-doped Na_2-xLi_xTi₃O₇ with the layered structure, (ii) undoped Na₂Ti₆O₁₃ with tunnel structure, and (iii) the NaLiTi₃O₇ impurity (at high x). It is argued that that the formation of Na_2-xLi_xTi₃O₇ is unlikely. Two major products could be assigned as undoped Na₂Ti₃O₇ and undoped Na₂Ti₆O₁₃. Also, the NaLiTi₃O₇ impurity (which has completely different structure from the layered alkali titanate) could be the structurally related Li₄Ti₅O₁₂ spinel. The present interpretation can explain the invariant unit cell parameters, the decrease of optical band gap, and the improvement of electrical conductivity observed by the original authors.

达席尔瓦等人。科学。Eng。b323(2026) 118836)最近报道了声化学合成掺锂钛酸钠Na2-xLixTi3O7 （x = 0,0.01, 0.02和0.03）。他们提出了三相产物：(i)具有层状结构的锂掺杂Na2-xLixTi3O7，（ii）具有隧道结构的未掺杂Na2Ti6O13，以及（iii） NaLiTi3O7杂质（高x）。认为Na2-xLixTi3O7不可能形成。两种主要产物分别为未掺杂的Na2Ti3O7和未掺杂的Na2Ti6O13。与层状碱钛酸盐结构完全不同的NaLiTi3O7杂质可能是与Li4Ti5O12尖晶石结构相关的。本文的解释可以解释原作者观察到的单元胞参数不变、光学带隙减小、电导率提高等现象。

{"title":"Comments on “tuning electrical conductivity in lithium-doped sodium titanate via sonochemical synthesis”","authors":"Tosapol Maluangnont","doi":"10.1016/j.mseb.2026.119218","DOIUrl":"10.1016/j.mseb.2026.119218","url":null,"abstract":"<div><div>da Silva et al. (Mater. Sci. Eng. B 323 (2026) 118836) recently reported the sonochemical synthesis of lithium-doped sodium titanate Na2-xLixTi3O7 (x = 0, 0.01, 0.02 and 0.03). They proposed three-phase products: (i) lithium-doped Na2-xLixTi3O7 with the layered structure, (ii) undoped Na2Ti6O13 with tunnel structure, and (iii) the NaLiTi3O7 impurity (at high x). It is argued that that the formation of Na2-xLixTi3O7 is unlikely. Two major products could be assigned as undoped Na2Ti3O7 and undoped Na2Ti6O13. Also, the NaLiTi3O7 impurity (which has completely different structure from the layered alkali titanate) could be the structurally related Li4Ti5O12 spinel. The present interpretation can explain the invariant unit cell parameters, the decrease of optical band gap, and the improvement of electrical conductivity observed by the original authors.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"326 ","pages":"Article 119218"},"PeriodicalIF":4.6,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023491","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

Unraveling broadened spectral response in 2D quantum dot solar cells via Sb2Se3/CaZrS3 dual chalcogenide absorbers: Insights from SCAPS-1D 通过Sb2Se3/CaZrS3双硫族吸收剂揭示二维量子点太阳能电池的宽光谱响应：来自SCAPS-1D的见解

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-19 DOI: 10.1016/j.mseb.2026.119216

Smriti Baruah , Janmoni Borah

This work presents an optimized dual chalcogenide perovskite absorber-based quantum dot solar cell (QD-CPSC) configuration, emphasizing the impact of bandgap engineering, layer thickness, dopant concentration, and defect density on both absorbers and quantum dot charge collection layers. Antimony Selenide (Sb₂Se₃) and Calcium Zirconium Trisulfide (CaZrS₃) absorbers were coupled with two-dimensional (2D) quantum dot Tungsten disulfide (WS₂), Copper Oxide (Cu₂O), and Molybdenum oxide (MoO_x) quantum dot electron and hole collection layers, achieving ideal energy band alignment that enhances optoelectronic conversion efficiency (OECE) and broadens spectral response. At a cumulative dual absorber width of 1.2 μm, 0.01 μm for each quantum dot charge collection layer, and uniform defect density of 10¹⁶ cm⁻³, the proposed FTO/WS₂/CaZrS₃/Sb₂Se₃/Cu₂O/MoOx/Au dual absorber device configuration attains a peak optoelectronic conversion (OECE) of 33.16%, short circuit current density (J_sc) of 34 mA/cm², open circuit voltage (V_oc) of 1.36 V and fill factor (FF) of 86%.This surpasses the 13.1% and 27% of OECE,11.5 mA/cm² and 31.5 mA/cm² of J_sc, 1.36 V and 1.046 V of Voc 83.8% and 84% of FF attained by CaZrS₃ and Sb₂Se₃ single-absorber counterparts. The proposed dual-absorber QD- CPSC extends the spectral response to 1100 nm with 90% quantum efficiency, outperforming the CaZrS₃ single-absorber chalcogenide solar cell (CSC) limit of 700 nm. While Sb₂Se₃ single-absorber CPSC achieves a comparable spectral range to the proposed dual absorber configuration, its quantum efficiency is lower at 55.5%. Temperature-dependent analyses revealed exceptional thermal stability, preserving its efficiency up to 31% even under elevated temperatures of 400 K.

本文提出了一种优化的基于双硫系钙钛矿吸收剂的量子点太阳能电池（QD-CPSC）结构，强调了带隙工程、层厚度、掺杂剂浓度和缺陷密度对吸收剂和量子点电荷收集层的影响。硒化锑（Sb2Se3）和三硫化锆钙（CaZrS3）吸收剂与二维（2D）量子点二硫化钨（WS2）、氧化铜（Cu2O）和氧化钼（MoOx）量子点电子和空穴收集层耦合，实现了理想的能带排列，提高了光电转换效率（OECE），拓宽了光谱响应。在累积双吸收体宽度为1.2 μm，每个量子点电荷收集层为0.01 μm，均匀缺陷密度为1016 cm−3的情况下，所提出的FTO/WS2/CaZrS3/Sb2Se3/Cu2O/MoOx/Au双吸收体器件结构的峰值光电转换（OECE）为33.16%，短路电流密度（Jsc）为34 mA/cm2，开路电压（Voc）为1.36 V，填充因子（FF）为86%。这超过了CaZrS3和Sb2Se3单吸收剂分别达到的OECE的13.1%和27%，Jsc的11.5 mA/cm2和31.5 mA/cm2， Voc的1.36 V和1.046 V， FF的83.8%和84%。所提出的双吸收体QD- CPSC将光谱响应扩展到1100 nm，量子效率为90%，优于CaZrS3单吸收体硫系太阳能电池（CSC） 700 nm的极限。虽然Sb2Se3单吸收体CPSC的光谱范围与所提出的双吸收体结构相当，但其量子效率较低，为55.5%。与温度相关的分析显示出优异的热稳定性，即使在400k的高温下，其效率也保持在31%。

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引用次数: 0

Super-stable dielectric temperature characteristic in BaTiO3-based lead-free relaxor ferroelectric ceramics batio3基无铅弛豫铁电陶瓷的超稳定介电温度特性

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-18 DOI: 10.1016/j.mseb.2026.119215

Ke Zhang , Abudulai Nancy Bawah , Ruixuan Wang, Chenglin Wang, Jingwang Lu, Jiajie Hao, Vendish Kweku Ennin, Chen Zhang

Aiming for developing a X8R MLCC lead-free dielectric, this work presents the successful synthesis of (1-x)BaTiO₃-xBi[(Mg_2/3Ta_1/3)_1–0.015xNb_0.015x]O_3+0.015x [(1-x)BT-xBMTN] lead-free ceramics via solid-state reaction route, based on the aliovalent Nb⁵⁺ doping for defect engineering. The investigation focuses on how BMTN doping influences the microstructure and functional properties involving dielectric properties, ferroelectric properties as well as relaxor behavior of the novel BT based ceramic system. The XRD analysis indicates that with increasing BMTN content, the primary phase of (1-x)BT-xBMTN ceramics changes from tetragonal to pseudo-cubic perovskite. Based on the SEM observation, the isolated secondary phases is detected and BMTN addition effectively refines grains, leading to dense microstructure with small, uniform grain size. With increasing x, a drastic shift of the ferroelectric-paraelectric phase transition temperature T_m from 107.3 °C down to −34.9 °C is found. The (1-x)BT-xBMTN ceramic with x = 0.3 achieves excellent dielectric temperature stability, satisfying the X8R specification (Δε_r/ε_r ≤ ±15%, −55 °C to 150 °C) while possessing a balanced combination of properties: A room-temperature permittivity (εᵣ_RT) of ∼600, loss tangent (tanδ_RT) of 0.0156, and breakdown strength (E_b) of 62.92 kV/cm. The (1-x)BT-xBMTN ceramics also exhibit strong frequency dispersion and enhanced phase transition diffuseness, with relaxor-like behavior validated by Vogel-Fulcher fitting. The P-E hysteresis loops indicate a decreased remanent polarization (2P_r) and polarization maximum (2P_m) after BMTN modification. The BMTN doped BT ceramics are dominated by Ohmic leakage conduction. And a recoverable energy storage density of 0.9 J/cm³ at 80 kV/cm provides a possibility for energy storage applications in (1-x)BT-xBMTN system

以开发X8R MLCC无铅介电介质为目标，采用固相反应的方法成功合成了（1-x）BaTiO3-xBi[(Mg2/3Ta1/3) 1-0.015xNb0.015x]O3+0.015x [(1-x)BT-xBMTN]无铅陶瓷。研究了BMTN掺杂如何影响新型BT基陶瓷体系的微观结构和功能特性，包括介电性能、铁电性能以及弛豫行为。XRD分析表明，随着BMTN含量的增加，（1-x）BT-xBMTN陶瓷的初生相由四方钙钛矿变为拟立方钙钛矿。通过扫描电镜观察，发现了孤立的二次相，BMTN的加入有效地细化了晶粒，形成了致密的组织，晶粒尺寸小而均匀。随着x的增加，铁电-准电相变温度从107.3℃急剧下降到- 34.9℃。x = 0.3的（1-x）BT-xBMTN陶瓷具有优异的介电温度稳定性，满足X8R规格（Δεr/εr≤±15%，- 55°C至150°C），同时具有平衡的性能组合：室温介电常数（εᵣRT）为~ 600，损耗正切（tanδRT）为0.0156，击穿强度（Eb）为62.92 kV/cm。（1-x）BT-xBMTN陶瓷还表现出强烈的频率色散和增强的相变扩散，并通过Vogel-Fulcher拟合验证了弛豫行为。P-E磁滞回线表明，经BMTN修饰后，残余极化（2Pr）和极化最大值（2Pm）降低。掺BMTN的BT陶瓷以欧姆漏导为主。在80 kV/cm下，可回收储能密度为0.9 J/cm3，为（1-x）BT-xBMTN系统的储能应用提供了可能

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引用次数: 0

Anomalous gas sensing characteristics of TiO2 nanorod arrays irradiated with high-energy ion beam 高能离子束辐照TiO2纳米棒阵列的异常气敏特性

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-18 DOI: 10.1016/j.mseb.2026.119210

Sutapa Dey , Shashi B. Mishra , Arnab Hazra , Debdulal Kabiraj , Somnath C. Roy

Controlled defect engineering using high-energy ion irradiation is an effective technique to tune the physical properties of a material at the nanoscale. Here, we report such effects on vertically oriented TiO₂ nanorod arrays grown on conductive glass substrate with different fluences, such as 5 × 10¹² and 5 × 10¹³ ions/cm², and change in resistance as a function of gas exposure was measured using hydrogen as the probe gas. The samples showed n-type characteristics from pristine to the fluence of 5 × 10¹² ions/cm²; while at higher fluence 5 × 10¹³ ions/cm², an n-to-p type transition in conductivity is observed. This is attributed to a combined effect of titanium vacancies and oxygen interstitials produced by the energetic ions. Our first-principles calculations show that higher irradiation fluence induces structural distortion that weakens hydrogen adsorption and suppresses charge transfer, collectively explaining the observed switch in gas sensing response and supporting the experimental findings.

利用高能离子辐照控制缺陷工程是在纳米尺度上调整材料物理性质的有效技术。在这里，我们报道了在导电玻璃衬底上生长的垂直取向TiO2纳米棒阵列在不同影响下的这种影响，例如5 × 1012和5 × 1013离子/cm2，并且使用氢气作为探针气体测量了气体暴露的函数电阻变化。样品从原始到5 × 1012个离子/cm2均表现出n型特征；在5 × 1013离子/cm2的高通量下，观察到电导率从n到p型转变。这是由于钛的空缺和氧的间隙产生的高能离子的综合作用。我们的第一性原理计算表明，较高的辐照通量会导致结构畸变，从而削弱氢的吸附并抑制电荷转移，从而共同解释了所观察到的气敏响应的转换，并支持了实验结果。

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引用次数: 0

Design of ZnAl-layered double hydroxide-based composite through in situ growth of ZIF-67 for enhanced photocatalytic performance 通过原位生长ZIF-67设计zno层状双氢氧化物基复合材料以增强光催化性能

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2026-01-18 DOI: 10.1016/j.mseb.2026.119202

Isna Nurmilatul Azizah, Widyan Muhammad Naufal, Sayekti Wahyuningsih, Witri Wahyu Lestari

The design of heterojunction-based photocatalysts offers a promising way to enhance photocatalytic efficiency. This study focuses on synthesizing and characterizing a ZIF-67@mixed metal oxide (ZIF-67@MMO) composite to investigate the effect of ZIF-67 incorporation on its structural and optical properties. ZnAl-layered double hydroxide (ZnAl-LDH) was synthesized using the co-precipitation method with Zn/Al molar ratios of 2, 3, and 4, followed by calcination at 800 °C to obtain MMO. XRD analysis revealed that a Zn/Al ratio of 3 produced optimal ZnO and ZnAl₂O₄ spinel phases. ZIF-67, a cobalt-based metal-organic framework, was then grown in-situ on MMO surfaces with mass ratios of 5%, 10%, and 15%. Structural and optical characterizations confirmed that all composites retained their crystalline integrity while exhibiting reduced band gap energies, thereby improving light absorption and charge separation. The ZIF-67@MMO composites enhanced electron-hole transfer efficiency, resulting in superior photocatalytic activity. The MZ67–15% composite, with 15% ZIF-67 loading, achieved nearly complete degradation of the indigo carmine (IC) dye within 120 min, showing a first-order rate constant of 31.6 × 10⁻³ min⁻¹, 6.7 times higher than that of pure MMO. Therefore, surface modification of MMO with ZIF-67 via-in situ growth is an effective strategy to develop high-performance photocatalysts for dye degradation.

异质结型光催化剂的设计为提高光催化效率提供了一条很有前途的途径。本研究的重点是合成和表征ZIF-67@mixed金属氧化物（ZIF-67@MMO）复合材料，研究ZIF-67掺入对其结构和光学性能的影响。采用共沉淀法，在Zn/Al摩尔比为2,3和4的条件下合成了znal -层状双氢氧化物（ZnAl-LDH），并在800℃下煅烧得到MMO。XRD分析表明，当Zn/Al比为3时，ZnO和ZnAl2O4尖晶石相最优。ZIF-67是一种钴基金属有机骨架，然后以5%、10%和15%的质量比在MMO表面原位生长。结构和光学表征证实，所有复合材料都保持了其晶体完整性，同时表现出降低的带隙能量，从而改善了光吸收和电荷分离。ZIF-67@MMO复合材料提高了电子-空穴转移效率，具有优异的光催化活性。MZ67-15%复合材料在添加15% ZIF-67的情况下，在120 min内几乎完全降解了靛蓝胭脂（IC）染料，一级速率常数为31.6 × 10−3 min−1，是纯MMO的6.7倍。因此，利用ZIF-67原位生长对MMO进行表面改性是开发高性能染料降解光催化剂的有效策略。

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