Diamond and Related Materials最新文献_第6页

Exploring sulfate-driven enhancement pseudocapacitive: A new study on the structural, electrochemical, and kinetic properties of NiSO₄ quantum-dot-decorated g-C₃N₄ nanosheets 探索硫酸盐驱动的增强赝电容：NiSO₄量子点修饰的g-C₃N₄纳米片的结构、电化学和动力学性质的新研究

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-02-03 DOI: 10.1016/j.diamond.2026.113406

Nagih M. Shaalan , Hany M. Abd El-Lateef , Sajid A. Ansari , Mohamad M. Ahmad , Abdullah Aljaafari , A.R. Altayar , Shalendra Kumar , Faheem Ahmad

This work demonstrates, for the first time, NiSO₄ quantum dots uniformly attached to g-C₃N₄ nanosheets. It reveals sulfate-driven enhancement of Ni²⁺/Ni³⁺ redox pseudocapacitance in alkaline media, activating g-C₃N₄ via NiSO₄(1-x)@g-C₃N₄(x) (x = 1.0, 0.9, 0.5, 0.2) systematically tuning loading effects. XRD confirms the coexistence of anhydrous NiSO₄ and NiSO₄·6H₂O phases with average crystallite size between 7 and 11 nm. HRTEM verifies uniformly distributed NiSO₄ quantum dots with an average size of ∼7 nm (2–10 nm distribution), and XPS confirms Ni²⁺ oxysulfate species strongly bound to g-C₃N₄ with abundant accessible redox sites for Ni²⁺/Ni³⁺ ions. For the optimized nanostructures with x = 0.2 and 0.5, higher charge-storage capacitance is observed, with maximal specific capacitances of 503.8 F g⁻¹ at a scan rate of 2 mV s⁻¹ and 492.9 F g⁻¹ at a current density of 0.5 A g⁻¹. Trasatti and Randles-Sevcik analyses EIS reveals dominant pseudocapacitive contributions. Furthermore, full cell exhibits a capacitance of 39.4 F g⁻¹ at 0.25 A g⁻¹, establishing NiSO₄ quantum-dot decoration as the first sulfate-driven pseudocapacitance strategy for activating g-C₃N₄ and providing new mechanistic insight into

S O_{4}^{2 -}

-enhanced Ni redox kinetics for high-performance supercapacitor applications. Post-cycling analyses reveal gradual

S O_{4}^{2 -}

leaching from NiSO₄ QDs into the alkaline media, forming Ni-oxide/hydroxide phases while preserving Ni²⁺/Ni³⁺ redox activity, demonstrating sulfates as initial conductivity enhancers with stable Ni-phases sustaining long-term pseudocapacitance.

这项工作首次证明了NiSO₄量子点均匀地附着在g-C₃N₄纳米片上。通过NiSO₄（1-x）@g-C₃N₄(x) （x = 1.0, 0.9, 0.5, 0.2）激活g-C₃N₄(x)，系统调节加载效果，揭示了硫酸盐驱动的碱性介质中Ni2+/Ni3+氧化还原赝电容增强作用。XRD证实无水NiSO₄和NiSO₄·6H₂O相共存，平均晶粒尺寸在7 ~ 11 nm之间。HRTEM证实了平均尺寸为~ 7 nm （2-10 nm分布）的均匀分布的NiSO₄量子点，XPS证实了与g-C₃N₄紧密结合的Ni2+氧硫酸盐物质具有丰富的Ni2+/Ni3+离子可达的氧化还原位点。对于x = 0.2和0.5的优化纳米结构，观察到更高的电荷存储电容，在扫描速率为2 mV s−1时的最大比电容为503.8 F g−1，在电流密度为0.5 ag−1时的最大比电容为492.9 F g−1。Trasatti和Randles-Sevcik分析EIS揭示了主要的伪电容贡献。此外，在0.25 a g−1下，全电池的电容值为39.4 F g−1，建立了NiSO₄量子点装饰作为激活g- c₃N₄的第一个硫酸盐驱动赝电容策略，并为高性能超级电容器应用中SO42−增强的Ni氧化还原动力学提供了新的机制见解。循环后分析表明，NiSO₄QDs中的SO42−逐渐浸出到碱性介质中，形成ni氧化物/氢氧化物相，同时保持Ni2+/Ni3+氧化还原活性，表明硫酸盐是初始电导率增强剂，具有稳定的ni相，维持长期的赝电容。

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引用次数: 0

A smart coating for Mg alloys based on mPDA/h-BN hybrids: Achieving self-healing via pH and light dual-responsive behaviour 基于mPDA/h-BN杂化物的镁合金智能涂层：通过pH和光双响应行为实现自修复

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.diamond.2026.113362

Renfei Xu, Xiangjun Li, Miaomiao Li, Yinxia Dong, Libo Tong

Despite the outstanding lightweight potential of Mg alloys, their poor corrosion resistance significantly limits their practical applications in engineering. As a more sustainable alternative to solvent-based resins, waterborne polyurethane (WPU) coatings offer notable environmental and safety benefits, including low VOC emissions, non-flammability, and ease of application. However, the inherent microporous defects formed during the curing process, coupled with the absence of self-healing capabilities, notably undermine their protective performance. In this study, a smart hybrid coating was developed to improve the corrosion protection of WPU on Mg alloys. The coating combines benzotriazole (BTA)-loaded mesoporous polydopamine (mPDA) microspheres and hydroxylated boron nitride (OH-BN) within the WPU matrix, achieving active-passive synergistic protection through dual pH/light responsiveness. The mPDA enhances OH-BN dispersion within the matrix and simultaneously acts as an intelligent carrier for the controlled release of BTA under acidic or light-irradiated conditions. Electrochemical impedance spectroscopy (EIS) showed that, after 6 h of immersion in NaCl solution (pH = 3), the damaged composite coating retained an impedance modulus of 2.37 × 10⁵ Ω·cm² at 0.1 Hz, and maintained a value of 1.97 × 10⁵ Ω·cm² under light irradiation-28 and 2.8 times higher, respectively, than pure WPU. These results confirm the coating's outstanding corrosion resistance and stimulus-responsive self-healing capability, which arise from the synergistic effects of the OH-BN barrier and BTA release under pH and light stimuli. This work presents a sustainable and intelligent corrosion protection strategy for Mg alloys in harsh environments.

尽管镁合金具有突出的轻量化潜力，但其较差的耐腐蚀性极大地限制了其在工程中的实际应用。作为一种更具可持续性的溶剂型树脂替代品，水性聚氨酯（WPU）涂料具有显著的环境和安全效益，包括低VOC排放、不易燃和易于应用。然而，在固化过程中形成的固有微孔缺陷，加上缺乏自修复能力，明显破坏了其保护性能。在本研究中，开发了一种智能混合涂层，以提高WPU对镁合金的防腐性能。该涂层将负载苯并三唑（BTA）的介孔聚多巴胺（mPDA）微球和羟基化氮化硼（OH-BN）结合在WPU基体中，通过双pH/光响应性实现主-被动协同保护。mPDA增强了OH-BN在基质中的分散，同时在酸性或光照条件下作为BTA可控释放的智能载体。电化学阻抗谱分析（EIS）表明，在NaCl溶液（pH = 3）中浸泡6 h后，损伤后的复合涂层在0.1 Hz下的阻抗模量为2.37 × 105 Ω·cm2，在光照下的阻抗模量为1.97 × 105 Ω·cm2，分别是纯WPU的28倍和2.8倍。这些结果证实了涂层出色的耐腐蚀性和刺激响应自修复能力，这是由于OH-BN屏障和BTA在pH和光刺激下释放的协同作用。本研究提出了一种可持续的、智能的镁合金恶劣环境腐蚀防护策略。

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引用次数: 0

Synergistic hydrogen plasma etching and in situ oxidation of boron-doped diamond for enhanced electrochemical ozone production 协同氢等离子体蚀刻和硼掺杂金刚石的原位氧化增强电化学臭氧生产

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-02-01 DOI: 10.1016/j.diamond.2026.113382

Lipeng Zhao , Yicheng Jiang , Shengli Zhu , Zhenduo Cui , Zhaoyang Li , Wence Xu , Zhonghui Gao , Meiqing Guo , Yanqin Liang , Hui Jiang

Boron-doped diamond (BDD) electrodes have attracted considerable attention as promising candidates for electrochemical ozone production (EOP) in extreme and corrosive environments, due to their exceptional chemical and physical stability. However, the inherently low ozone generation efficiency has significantly hindered their widespread application in EOP processes. In this study, a hydrogen plasma etching strategy was developed to fabricate hydrogen-terminated BDD electrodes, which undergo in situ oxidation during the anodic reaction, thereby transforming the surface termination from hydrogen to oxygen. This surface-engineering approach markedly enhances the electrode's electrocatalytic activity for ozone generation. Experimental results demonstrated that, compared to the as-deposited BDD electrode, the sample etched for 1.5 h at a chamber temperature of 700 °C and a hydrogen flow rate of 300 sccm (labeled as BDD-H_1.5h) exhibited a significantly increased electrochemical active area (ECSA) and a decreased charge transfer resistance (Rct). As a result, the ozone production rate of the BDD-H_1.5h electrode was 2.66 times higher than that of the untreated BDD electrode, with a Faradaic efficiency (FE) of 17.23%. Theoretical calculations further revealed that the combination of appropriate hydrogen plasma etching and in situ oxidation leads to the enrichment of C-O-C and C-OH functional groups on the electrode surface. These surface species significantly enhance the adsorption of the OH^⁎ intermediate, which plays a pivotal role in the ozone oxidation pathway. Therefore, the BDD-H_1.5h electrode exhibits excellent performance in the electrocatalytic ozonation of the representative organic dye pollutant Acid Red 27 (AR 27). This highlights the great potential of modified BDD electrodes for efficient ozone generation and organic pollutant removal in water treatment applications.

掺硼金刚石（BDD）电极由于其优异的化学和物理稳定性，作为在极端和腐蚀环境下电化学臭氧生产（EOP）的有希望的候选者，引起了人们的广泛关注。然而，固有的低臭氧生成效率严重阻碍了它们在EOP工艺中的广泛应用。在本研究中，开发了一种氢等离子体刻蚀策略来制作端氢BDD电极，该电极在阳极反应过程中进行原位氧化，从而将表面端氢转变为氧。这种表面工程方法显著提高了电极对臭氧生成的电催化活性。实验结果表明，与沉积的BDD电极相比，在700°C的腔室温度和300 sccm的氢气流速下蚀刻1.5h的样品（标记为BDD- h1.5 h）的电化学活性面积（ECSA）显著增加，电荷转移电阻（Rct）显著降低。结果表明，BDD- h1.5 h电极的臭氧产率是未处理BDD电极的2.66倍，其法拉第效率（FE）为17.23%。理论计算进一步表明，适当的氢等离子体刻蚀和原位氧化相结合可以使电极表面的C-O-C和C-OH官能团富集。这些表面物质显著增强了OH -中间物的吸附，这在臭氧氧化途径中起着关键作用。因此，BDD-H1.5h电极在典型有机染料污染物酸性红27 （AR 27）的电催化臭氧化中表现出优异的性能。这凸显了改性BDD电极在水处理应用中高效臭氧生成和有机污染物去除方面的巨大潜力。

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引用次数: 0

Enhanced electrochemical performance and internal resistance dynamics of Zn-MOF-74/rGO composite cathode for aqueous zinc-ion batteries 锌- mof -74/氧化石墨烯复合阴极的电化学性能和内阻动力学研究

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-29 DOI: 10.1016/j.diamond.2026.113380

Abdulhadi H. Al-Marri

The development of high-performance aqueous zinc-ion batteries (AZIBs) requires cathode materials capable of combining fast Zn²⁺ transport, high electronic conductivity, and long-term structural stability. In this work, we report a Zn-MOF-74/rGO composite synthesized through a facile in-situ hydrothermal route, in which reduced graphene oxide (rGO) forms a conductive and mechanically robust framework within the MOF matrix. Structural analyses confirm that the incorporation of rGO preserves the crystalline integrity of the MOF-74 framework while significantly improving its textural properties and thermal stability. The resulting hybrid exhibits a high specific surface area (≈950 m² g⁻¹) and a hierarchical porous network that facilitates rapid Zn²⁺ diffusion. Electrochemical measurements reveal a remarkable enhancement in charge-storage performance: the composite delivers 291 mAh g⁻¹, superior rate capability, and excellent cycling stability with 94% capacity retention after 1000 cycles at 2.0 A g⁻¹. Dynamic charge internal resistance (DCIR) analysis further demonstrates reduced polarization and improved interfacial kinetics, confirming the key role of rGO in lowering internal resistance under various operating conditions. The synergistic interplay between the MOF-74 framework and the rGO network enables fast electrochemical kinetics, enhanced electronic pathways, and robust structural durability. This study provides new insights into DCIR evolution in MOF-based electrodes and highlights a promising strategy for designing next-generation high-power AZIBs.

高性能水性锌离子电池（azib）的发展需要能够结合Zn2+快速输运、高电子导电性和长期结构稳定性的正极材料。在这项工作中，我们报道了一种通过简单的原位水热方法合成的Zn-MOF-74/rGO复合材料，其中还原的氧化石墨烯（rGO）在MOF基体内形成导电且机械坚固的框架。结构分析证实，rGO的加入保留了MOF-74框架的结晶完整性，同时显著改善了其结构性能和热稳定性。所得到的杂化材料具有高比表面积（≈950 m2 g−1）和分层多孔网络，有利于Zn2+的快速扩散。电化学测量显示电荷存储性能显著增强：复合材料提供291 mAh g - 1，优越的倍率能力和出色的循环稳定性，在2.0 ag - 1下循环1000次后容量保持94%。动态电荷内阻（DCIR）分析进一步证明了极化降低和界面动力学改善，证实了还原氧化石墨烯在各种操作条件下降低内阻的关键作用。MOF-74框架和氧化石墨烯网络之间的协同相互作用可以实现快速的电化学动力学，增强的电子路径和坚固的结构耐久性。该研究为mof电极的DCIR演变提供了新的见解，并强调了设计下一代高功率azib的有前途的策略。

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引用次数: 0

Detection of Escherichia coli using GMR integrated with L-histidine-linked Fe3O4/rGO magnetic nanoparticles 结合l -组氨酸连接Fe3O4/rGO磁性纳米颗粒的GMR检测大肠杆菌

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI: 10.1016/j.diamond.2026.113376

Layyinatus Shifa , Zurnansyah , Emi Kurnia Sari , Nurul Imani Istiqomah , Mercuryta Dewi Noviastuti , Nugraheni Puspita Rini , Julia Angel , Tri Marji Atmono , Kohji Nakamura , Edi Suharyadi

Escherichia coli (E. coli) has been successfully detected using a giant magnetoresistance (GMR) chip as a transducer, employed with Fe₃O₄ and Fe₃O₄/reduced graphene oxide (rGO) nanoparticles as magnetic nanotag labels and L-Histidine (L-His) as a linker. The E. coli concentration was varied to investigate how different levels of E. coli affect the voltage signal generated by the GMR sensor. The nanoparticles were fabricated through a hybrid approach that employs a green synthesis method using plant extracts. The nanoparticles exhibit superparamagnetic behavior, which influences the detection quality of the labels. The result shows that the higher E. coli concentration results in a more substantial increase in the voltage signal. For the Fe₃O₄/rGO-His label, the voltage is 0.075, 0.131, and 0.173 V for E. coli variations of 1:1000, 1:100, and 1:10, respectively. The signal for Fe₃O₄/rGO-His label is more significant than that of Fe₃O₄-His due to the contribution of rGO which increases the binding of L-His and E. coli. Moreover, the result of the relative standard deviation shows an increase from 0.26% to 6.1% for Fe₃O₄-His and from 0.69% to 5.1% for Fe₃O₄/rGO-His, indicating an acceptable level of reproducibility in the sensor's detection.

利用巨磁电阻（GMR）芯片作为传感器，以Fe3O4和Fe3O4/还原氧化石墨烯（rGO）纳米颗粒作为磁性纳米标签，l -组氨酸（L-His）作为连接剂，成功检测出大肠杆菌（E. coli）。改变大肠杆菌浓度，研究不同水平的大肠杆菌如何影响GMR传感器产生的电压信号。纳米颗粒是通过混合方法制造的，该方法采用绿色合成方法，使用植物提取物。纳米粒子表现出超顺磁性，影响了标记的检测质量。结果表明，大肠杆菌浓度越高，电压信号的增加幅度越大。对于Fe3O4/rGO-His标签，大肠杆菌1:1000、1:100和1:10变化的电压分别为0.075、0.131和0.173 V。Fe3O4/rGO- his标记的信号比Fe3O4- his的信号更显著，这是由于rGO的贡献，它增加了L-His与大肠杆菌的结合。此外，相对标准偏差的结果显示，Fe3O4- his从0.26%增加到6.1%，Fe3O4/rGO-His从0.69%增加到5.1%，表明传感器检测的再现性水平可接受。

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引用次数: 0

Design and synthesis of a PtNPs@GQDs nanocomposites and its anticancer effects on colorectal cancer PtNPs@GQDs纳米复合材料的设计与合成及其对结直肠癌的抗癌作用

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI: 10.1016/j.diamond.2026.113389

HuiLong Xie , YongQin Wei , JiaNi Xiong , ChengYan Wang , GuoCong Guo , JieMing Xie

Platinum-based chemotherapy for colorectal cancer is limited by severe nephrotoxicity and drug resistance. To address this, we synthesized a novel platinum nanoparticle-graphene quantum dot nanostructure (PtNPs@GQDs), characterized by excellent water solubility, stability, and high catalytic/reductive activity. In vitro, PtNPs@GQDs demonstrated potent growth inhibition of colon cancer cells at low platinum concentrations (<1.6 μg Pt/mL) and significantly induced apoptosis. In vivo, PtNPs@GQDs (8.2 and 12.4 mg Pt/kg) markedly suppressed tumor growth in HT-29 xenograft mice. These findings highlight PtNPs@GQDs as a promising new chemotherapeutic agent for colorectal cancer.

以铂为基础的结直肠癌化疗由于严重的肾毒性和耐药性而受到限制。为了解决这个问题，我们合成了一种新型的铂纳米粒子-石墨烯量子点纳米结构（PtNPs@GQDs），具有优异的水溶性，稳定性和高催化/还原活性。在体外，PtNPs@GQDs在低铂浓度（<1.6 μg Pt/mL）下对结肠癌细胞有明显的生长抑制作用，并显著诱导细胞凋亡。在体内，PtNPs@GQDs（8.2和12.4 mg Pt/kg）显著抑制HT-29异种移植小鼠的肿瘤生长。这些发现突出了PtNPs@GQDs作为一种有前景的结直肠癌新化疗药物。

引用次数: 0

Multifunctional S–g–C₃N₄/Fe–ZnO photocatalysts for visible-light-induced pollutant degradation and hydrogen evolution S-g-C₃N₄/ Fe-ZnO多功能可见光污染物降解及析氢催化剂

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.diamond.2026.113354

Chandrakanta Mishra , Swagatika Sahoo , Manamohan Tripathy , Soumyaranjan Senapati , Dayananda Sarangi , Sandip Padhiari

The development of multifunctional photocatalyst capable of simultaneously addressing environmental pollution and clean energy production is of great importance. In this work, sulfur-doped graphitic carbon nitride (S-CN) and Fe-doped ZnO (FZ) were first synthesized individually, followed by the fabrication of a series of S-CN/FZ composites with varying loadings (5, 10, 15, and 20 wt% of FZ). Notably, this designed dual-doped type-II heterojunction integrates photocatalytic oxidation, reduction, and hydrogen evolution within a single visible light responsive system. The structural, morphological, and optical properties of the prepared materials were systematically characterized using XRD, FTIR, XPS, FESEM-EDX, PL, and UV–Vis DRS, PL, and electrochemical analyses, confirming the successful formation of heterojunctions and enhanced visible-light absorption. Among all the composites, S-CN/15FZ exhibited superior photocatalytic activity, achieving rapid reduction of 4-nitrophenol (96.3%) and efficient degradation of tetracycline hydrochloride (94.7%) under visible light irradiation. Furthermore, the optimized heterostructure demonstrated remarkable performance in photocatalytic H₂ evolution (5402.91 μmol g⁻¹ h⁻¹), surpassing that of the pristine components. The enhanced activity is attributed to the synergistic effects of S and Fe dual doping, which are responsible for tailoring the band structure and promoting the charge transfer across the S-CN/FZ interface. This study highlights the potential of S-CN/FZ heterostructures as promising candidates for multifunctional photocatalysis in environmental remediation and sustainable energy applications.

开发能够同时解决环境污染和清洁能源生产的多功能光催化剂具有重要意义。在这项工作中，首先分别合成了硫掺杂石墨氮化碳（S-CN）和铁掺杂ZnO (FZ)，然后制作了一系列不同负载（FZ的5、10、15和20 wt%）的S-CN/FZ复合材料。值得注意的是，这种设计的双掺杂ii型异质结在一个单一的可见光响应系统中集成了光催化氧化、还原和析氢。利用XRD、FTIR、XPS、FESEM-EDX、PL、UV-Vis DRS、PL和电化学分析对所制备材料的结构、形貌和光学性质进行了系统表征，证实了异质结的成功形成和可见光吸收的增强。在所有复合材料中，S-CN/15FZ表现出优异的光催化活性，在可见光照射下可快速还原4-硝基苯酚（96.3%），高效降解盐酸四环素（94.7%）。此外，优化后的异质结构在光催化H₂演化方面表现出了显著的性能（5402.91 μmol g−1 H−1），超过了原始组分。活性的增强是由于S和Fe双掺杂的协同作用，它们负责调整能带结构并促进S- cn /FZ界面上的电荷转移。该研究强调了S-CN/FZ异质结构在环境修复和可持续能源应用中的多功能光催化潜力。

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引用次数: 0

A novel fabrication method of small arc-shaped CVD diamond roller wheel using mechanical grinding truing and femtosecond laser sharpening 提出了一种利用机械磨铣和飞秒激光锐化加工小圆弧型CVD金刚石滚轮的新方法

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.diamond.2026.113369

Longzhou Dai , Zhengchao wan , Mingjun Zhang , Genyu Chen , Cong Mao , Yuanqiang Luo , Weidong Tang , Bo Cheng

The small arc-shaped CVD diamond roller wheel has broad application prospects in the preparation of micro-structured cutting tools. However, CVD diamond material has good wear resistance, which makes it extremely difficult to dress its small arc-shaped profile. In this work, the oblique line interpolation tangential envelope method is proposed to dress the small arc-shaped CVD diamond roller wheel. This method utilizes the squeezing contact points of two rotating wheels on the dressing path to form the required small arc-shaped profile. This can simultaneously avoid uneven loss of the tool wheel and interference with the installation accuracy of the machine tool, improving the dressing precision of arc-shaped profile. The profile errors caused by different machine tool motion axis are analyzed. The corresponding profile error prediction models have been established. In order to improve the truing accuracy of CVD diamond roller wheel, a segmented arc compensation method is proposed. Finally, femtosecond laser processing technology is used to achieve sharpening of CVD diamond roller wheel. The abrasive particles have a suitable blade height to facilitate the excellent grinding performance of the roller wheel.

小圆弧型CVD金刚石滚轮在微结构刀具的制备中具有广阔的应用前景。然而，CVD金刚石材料具有良好的耐磨性，这使得其小弧形轮廓极难修饰。本文提出了斜插补切包络法对小圆弧型CVD金刚石滚轮进行修整。该方法利用修整路径上两个转轮的挤压接触点形成所需的小弧形轮廓。这样可以同时避免砂轮的不均匀损耗和对机床安装精度的干扰，提高弧形轮廓的修整精度。分析了不同机床运动轴引起的轮廓误差。建立了相应的剖面误差预测模型。为了提高CVD金刚石滚轮的加工精度，提出了一种分段电弧补偿方法。最后，利用飞秒激光加工技术实现了CVD金刚石滚轮的锐化。磨料颗粒具有合适的刃高，有利于滚轮的优异磨削性能。

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引用次数: 0

Ultralight and multidimensional chitosan-based aerogel composites with an enhanced microwave absorption performance 具有增强微波吸收性能的超轻和多维壳聚糖基气凝胶复合材料

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.diamond.2026.113333

Mahdieh Dehghani-Dashtabi, Hoda Hekmatara, Masoud Mohebbi

Porous polymer aerogels are emerging as the next generation of electromagnetic wave (EMW) absorbers due to their low density, adaptability, environmental friendliness, broad bandwidth and high dielectric loss. In this study, different ratios (35, 50 and 75 wt%) of MoSe₂/MWCNT/MMT nanocomposites which were named as C2-C4 and MWCNT-free was named as C1 were incorporated into the chitosan matrix as filler with different weight ratios to chitosan and the ultralight and multidimensional MoSe₂/MWCNT/MMT-Chitosan aerogels were prepared via freeze-drying. MoSe₂/MWCNT/MMT (50 wt%)-Chitosan (C3) composite was the optimized sample exhibiting the highest reflection loss of −84.40 dB at a thickness of 2.6 mm, with a remarkable bandwidth of 10 GHz covering the entire X and Ku bands. This exceptional performance is attributed to the synergistic effects of various loss mechanisms, including the conduction loss facilitated by Multi-walled carbon nanotube) MWCNT(, the dipole and interfacial polarizations created by MoSe₂ and Montmorillonite) MMT(, and the multiphase activity due to the polygonal porous morphology. Notably, this high microwave absorption efficiency is achieved without magnetic components, offering significant potential for the design of advanced, lightweight, stable, and high-performance microwave absorbers. The radar cross-section (RCS) and far-field measurements demonstrated that coating a perfect electric conductor (PEC) sphere with each composite of C1, C2 and C3 led to a pronounced attenuation effect, achieving reductions of about 30–48 dB in RCS and 18 dB in the scattered far-field intensity.

多孔聚合物气凝胶具有低密度、适应性强、环境友好、宽带宽和高介电损耗等优点，正成为下一代电磁波吸收材料。本研究将不同重量比（35、50、75% wt%）的MoSe₂/MWCNT/MMT纳米复合材料分别命名为C2-C4和无MWCNT命名为C1，作为与壳聚糖重量比不同的填料加入到壳聚糖基体中，通过冷冻干燥法制备了超轻、多层的MoSe₂/MWCNT/MMT-壳聚糖气凝胶。MoSe₂/MWCNT/MMT (50 wt%)-壳聚糖（C3）复合材料在厚度为2.6 mm时的反射损耗最高，为−84.40 dB，具有覆盖整个X和Ku波段的10 GHz带宽。这种优异的性能归因于多种损耗机制的协同作用，包括多壁碳纳米管（MWCNT）导致的传导损耗（）、二氧化硅和蒙脱土（MWCNT）产生的偶极子和界面极化（），以及多相多孔形态导致的多相活性。值得注意的是，这种高微波吸收效率是在没有磁性元件的情况下实现的，这为设计先进、轻便、稳定和高性能的微波吸收器提供了巨大的潜力。雷达截面（RCS）和远场测量结果表明，在完美电导体（PEC）球表面涂覆C1、C2和C3的复合材料具有明显的衰减效果，RCS降低约30-48 dB，远场散射强度降低约18 dB。

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引用次数: 0

Iron and cobalt co-doped ZnO nanoparticles grafted over CNTs: An efficient electrochemical probe for the detection of paracetamol 碳纳米管接枝铁钴共掺杂ZnO纳米粒子：一种检测扑热息痛的高效电化学探针

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.diamond.2026.113367

Sajid Ali Madni , Abid Ali , Murat Kaleli , Salih Akyürekli , Mashael M. Alharbi , Nadiah Al-Mutlaq , Imene Bayach , Amel Y. Ahmed

Acetaminophen (paracetamol), a widely used analgesic and antipyretic, requires precise and sensitive detection for pharmaceutical and clinical applications. Iron and Cobalt (Fe/Co) co-doped ZnO@CNTs nanocomposites, synthesized via a precipitation method has been developed for the electrochemical detection of acetaminophen. These nanocomposites were doped with equimolar amount of Fe/Co with the concentrations of 1%, 5%, and 10% to optimize the electrocatalytic performance of nanocomposites (ZnO@CNTs). Characterization using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) Energy-Dispersive X-ray Spectroscopy (EDX), and X-ray Diffraction (XRD) and Raman spectroscopy confirmed the successful metallic doping and uniform dispersion within the composite matrix. While, electrochemical studies, including cyclic voltammetry (CV), scan rate analysis, and chronoamperometry, revealed that the 1% doped concentration achieved the lowest limit of detection (LOD), significantly enhancing electron transfer kinetics and sensitivity for acetaminophen detection. 1% Fe/Co doped ZnO@CNT showed lowest LOD of 0.045 μM with high sensitivity of 1.862 μA mM⁻¹ cm⁻². The Fe/Co-doped ZnO@CNTs nanocomposites demonstrated outstanding sensitivity, stability, and reproducibility, underscoring their potential for practical acetaminophen analysis.

对乙酰氨基酚（paracetamol）是一种广泛应用的镇痛解热药，在制药和临床应用中需要精确、灵敏的检测方法。采用沉淀法合成了铁和钴（Fe/Co）共掺杂ZnO@CNTs纳米复合材料，用于对乙酰氨基酚的电化学检测。这些纳米复合材料分别以1%、5%和10%的浓度掺杂等摩尔量的Fe/Co以优化纳米复合材料的电催化性能（ZnO@CNTs）。利用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能量色散x射线能谱（EDX）、x射线衍射（XRD）和拉曼光谱进行表征，证实了金属在复合基体内的成功掺杂和均匀分散。而电化学研究，包括循环伏安法（CV）、扫描速率分析和计时安培法，表明1%的掺杂浓度达到了最低检测限（LOD），显著提高了对乙酰氨基酚检测的电子转移动力学和灵敏度。掺1% Fe/Co ZnO@CNT的最低LOD为0.045 μM，灵敏度为1.862 μA mM−1 cm−2。Fe/ co掺杂ZnO@CNTs纳米复合材料表现出出色的灵敏度、稳定性和可重复性，强调了它们在实际对乙酰氨基酚分析中的潜力。

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