Diamond and Related Materials最新文献_第5页

Research on diamond deposition doped with B and Sn by laser irradiation in MPCVD and its electrochemical properties 激光辐照MPCVD掺杂B、Sn金刚石沉积及其电化学性能研究

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: 2026-01-15 DOI: 10.1016/j.diamond.2026.113328

Bochun Li , Kesheng Guo , Yuxiang Xu , Bin He , Xiaodong Guo , Yinghao Xuan , Lang Hu , Qiang Hu , Wei Dai , Qimin Wang

Doped diamond coatings, as a novel electrode material with wide potential windows, high stability, and low adsorption, hold great promise for electrochemical and water purification applications. This study reports, for the first time, the preparation of SnBDD boron‑tin co-doped diamond coatings using the MPCVD method. By controlling the laser treatment process, elements B and Sn were doped into the diamond, and the surface morphology, elemental composition, and electrochemical performance were analyzed. It was detected that Sn formed bonds with C, confirming its successful incorporation into the diamond coating. Furthermore, Material Studio was used to simulate and analyze spectral changes after diamond doping. Experiments showed that the potential window of the diamond coating doped with B and Sn elements expanded by approximately 0.5–1.7 eV, enhancing its performance and durability as an electrode for water purification and SnBDD electrodes achieved ∼97% transmittance within 60 min of simulated wastewater treatment, Simultaneously, the absorbance of the simulated waste liquid significantly decreased after treatment, demonstrating near-complete organic decomposition and superior performance over single-doped BDD electrodes. These findings open avenues for multi-element doping strategies to further enhance diamond electrodes' performance and durability for advanced electrochemical applications.

掺杂金刚石涂层作为一种新型电极材料，具有宽电位窗、高稳定性、低吸附性等优点，在电化学和水净化领域具有广阔的应用前景。本研究首次报道了用MPCVD方法制备SnBDD硼锡共掺杂金刚石涂层。通过控制激光处理工艺，将B、Sn元素掺杂到金刚石中，分析其表面形貌、元素组成和电化学性能。检测到Sn与C形成键，证实其成功地结合到金刚石涂层中。利用Material Studio模拟分析了金刚石掺杂后的光谱变化。实验表明，掺杂B和Sn元素的金刚石涂层的电位窗口扩大了约0.5-1.7 eV，提高了其作为水净化电极的性能和耐久性，SnBDD电极在模拟废水处理60 min内达到了~ 97%的透光率，同时处理后模拟废液的吸光度显著降低。展示了近乎完全的有机分解和优于单掺杂BDD电极的性能。这些发现为多元素掺杂策略开辟了道路，以进一步提高金刚石电极的性能和耐久性，用于高级电化学应用。

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引用次数: 0

Influence of sliding angle on friction reduction of surface-textured amorphous carbon films and its relationship with textured shape 滑动角对表面织构非晶碳膜摩擦减量的影响及其与织构形状的关系

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.2026.113373

Xiang Lu , Naizhou Du , Xiaowei Li , Xubing Wei , Jiahao Dong , Junjie Lu , Kai Chen , Hao Li , Chengyuan Liu , Aiping Lin , Wei Liu

The combination of surface texturing technology and amorphous carbon (a-C) solid lubricating films has garnered significant attention due to their potential to enhance friction performance across various environments. However, the effect of sliding angles on the friction reduction of textured a-C films remains insufficiently studied. Particularly, the current experimental characterization techniques are still constrained in in-situ monitoring of interfacial physicochemical interactions and microstructural evolution during friction processes, resulting in incomplete elucidation of the underlying mechanisms. Herein, using reactive molecular dynamics simulations, the role of sliding angle in friction reduction of surface circular-textured a-C films was systematically investigated, and its dependence on textured shape was also considered by comparing with the rectangular-textured case. Results indicate that the tribological performance is highly dependent on the sliding angle. The friction coefficient exhibits an initial decrease followed by an increase with increasing sliding angle from 0° to 90°, with the optimal frictional behavior observed at a sliding angle of 60°. This performance is primarily governed by the combined effects of interfacial crosslinking and passivation degrees. Furthermore, the a-C films with different textured shapes exhibit a similar trend in friction behavior with respect to sliding angle. But the differences in friction response between the two geometries are predominantly governed by alternating contributions from interfacial crosslinking and the reduction of unsaturated bonds. These results elucidate the friction-reduction mechanisms of surface-textured a-C films under varying sliding angles, providing theoretical guidance for texture design optimization and operational parameter selection in engineering applications.

表面织构技术和非晶碳（a-C）固体润滑膜的结合由于其在各种环境下提高摩擦性能的潜力而引起了极大的关注。然而，滑动角对织构a-C薄膜摩擦减量的影响研究尚不充分。特别是，目前的实验表征技术仍然局限于对摩擦过程中界面物理化学相互作用和微观结构演变的原位监测，导致对潜在机制的不完全阐明。本文采用反应分子动力学模拟的方法，系统研究了滑动角对表面圆形织构a-C膜摩擦减量的影响，并通过与矩形织构的对比，考虑了滑动角对表面圆形织构a-C膜摩擦减量的依赖关系。结果表明，摩擦磨损性能与滑动角密切相关。从0°到90°，随着滑动角的增大，摩擦系数呈现先减小后增大的趋势，在60°滑动角时摩擦性能最佳。这种性能主要受界面交联和钝化程度的综合影响。此外，不同织构形状的a- c薄膜的摩擦行为随滑动角的变化趋势相似。但两种几何结构之间的摩擦响应差异主要是由界面交联和不饱和键的减少交替贡献决定的。这些结果阐明了不同滑动角下表面织构a-C膜的减摩机理，为工程应用中织构优化设计和操作参数选择提供了理论指导。

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引用次数: 0

Engineering nitrogen vacancies in g-C₃N₄ through post-heat treatment for enhanced photocatalytic H₂O₂ evolution 通过后热处理在g-C₃N₄中制造氮空位，以增强光催化H₂O₂的析出

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: 2026-01-27 DOI: 10.1016/j.diamond.2026.113368

Ali Alsalme

Visible-light-driven photocatalytic H₂O₂ production is one of the most promising approaches for generating sustainable solar fuel through the two-electron reduction of molecular oxygen. In this work, a simple post-synthesis heat treatment method was employed to prepare defective carbon nitride (g-C₃N₄) with enhanced photocatalytic activity. High-temperature treatment at 550 °C and 600 °C facilitates the formation of sp²-hybridized nitrogen vacancies within the g-C₃N₄ framework. The sample treated at 550 °C exhibited improved photocatalytic efficiency due to enhanced visible-light absorption. In contrast, the 600 °C-treated sample introduced intermediate energy levels within the bandgap, which promoted both visible-light absorption and efficient charge carrier separation during H₂O₂ production. Analytical studies further revealed that the presence of nitrogen vacancies in the g-C₃N₄ system significantly enhances the overall electron reduction process, leading to improved photocatalytic H₂O₂ evolution.

可见光驱动的光催化H₂O₂生产是通过分子氧的双电子还原产生可持续太阳能燃料的最有前途的方法之一。本文采用简单的合成后热处理方法制备了光催化活性增强的缺陷氮化碳（g-C₃N₄）。550°C和600°C的高温处理有助于在g-C₃N₄框架内形成sp2杂化氮空位。在550°C下处理的样品由于可见光吸收增强而表现出更高的光催化效率。相比之下，600°c处理的样品在带隙内引入了中间能级，这促进了可见光吸收和H₂O₂生产过程中有效的载流子分离。分析研究进一步表明，g-C₃N₄体系中氮空位的存在显著增强了整个电子还原过程，从而改善了光催化H₂O₂的演化。

引用次数: 0

A review: Preparation and application of biomass based carbon aerogel 综述：生物质基碳气凝胶的制备及应用

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: 2026-01-24 DOI: 10.1016/j.diamond.2026.113361

Hanqing Peng , Zuozhao Zhai , Bin Ren

The utilization of biomass resources can not only alleviate energy shortage and environmental problems, but also contribute to sustainable development. The preparation of carbon aerogel from biomass can realize the efficient utilization of waste resources. Herein, this review summarizes the preparation and application of biomass based carbon aerogel. Firstly, this review systematically deconstruct the intrinsic molecular architectures and chemistry of quintessential biomass feedstocks (cellulose, chitin, starch, and sodium alginate) and elucidate how these inherent features dictate the gelation pathways, pore structure evolution, and ultimate functionality of the resulting carbon skeletons. Then, this review further advances beyond a conventional listing of applications in water treatment, energy storage, electromagnetic interference shielding, gas adsorption, thermal insulation, and sensing. This review provides a focused analysis on the mechanistic links between the tailorable hierarchical porosity/surface chemistry of biomass CAs and their performance. Finally, critical challenges hindering industrial translation are identified, including the absence of a dominant high-performance precursor, low carbonization yield, and the energy-intensive freeze-drying bottleneck. This review aims to provide a foundational framework and a forward-looking design logic for transitioning biomass based carbon aerogel from laboratory curiosities toward customizable, high-performance materials for advanced sustainable technologies.

生物质资源的利用不仅可以缓解能源短缺和环境问题，而且有助于可持续发展。以生物质为原料制备碳气凝胶，可以实现废弃物资源的高效利用。本文综述了生物质基碳气凝胶的制备及其应用。首先，本文系统地解构了典型生物质原料（纤维素、几丁质、淀粉和海藻酸钠）的内在分子结构和化学结构，并阐明了这些内在特征如何决定凝胶化途径、孔隙结构演化和最终碳骨架的功能。然后，本文进一步介绍了其在水处理、储能、电磁干扰屏蔽、气体吸附、隔热和传感等方面的应用。本文重点分析了生物质CAs可定制的分层孔隙/表面化学与其性能之间的机制联系。最后，确定了阻碍工业转化的关键挑战，包括缺乏主导的高性能前驱体，低碳化率和能源密集型冷冻干燥瓶颈。本综述旨在为生物质基碳气凝胶从实验室的好奇心向可定制的高性能材料过渡提供一个基础框架和前瞻性的设计逻辑，用于先进的可持续技术。

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引用次数: 0

Research on surface quality assessment using fractal dimension for two-dimensional ultrasonic-assisted grinding of unidirectional Cf/SiC composites 基于分形维数的单向Cf/SiC复合材料二维超声辅助磨削表面质量评价研究

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: 2026-01-20 DOI: 10.1016/j.diamond.2026.113351

Zhenyan Duan , Tao Chen , Yuhao Suo , Haohui Shi , Junpeng Ye

Accurately characterizing surface quality is a prerequisite for the subsequent optimization of the processing scheme when processing of composites such as carbon fiber-reinforced silicon carbide matrix composites (C_f/SiCs). Properties such as the scale-free nature of the fractal dimension make it independent of the measuring accuracy of the instrument. In this study, the surface quality characterization of C_f/SiCs after two-dimensional ultrasonic-assisted grinding (2D-UAG) was explored using fractal dimension D_s. Firstly, C_f/SiCs were classified into three fiber arrangement directions, i.e., perpendicular, longitudinal, and transverse. Secondly, the fractal characteristics of C_f/SiCs in the three fiber orientations were demonstrated. The results showed that the self-similar magnification interval of the C_f/SiCs' image with longitudinal and vertical fiber arrangement is 200×–500× magnification. In addition, C_f/SiCs with different fiber orientation directions exhibited different material removal mechanisms, which in turn affected their surface quality. C_f/SiCs with perpendicular fiber arrangement have the best machined surface quality, while C_f/SiCs with longitudinal fiber arrangement have the worst machined surface quality.

在碳纤维增强碳化硅基复合材料（Cf/ sic）加工过程中，准确表征表面质量是后续优化加工方案的前提。诸如分形维数的无标度性质等特性使其与仪器的测量精度无关。本研究利用分形维数Ds对二维超声辅助磨削（2D-UAG）后的Cf/ sic表面质量进行了表征。首先，将Cf/ sic分为垂直、纵向和横向三个光纤排列方向；其次，分析了Cf/ sic在三种纤维取向下的分形特征。结果表明：纵向和纵向光纤排列的Cf/ sic图像的自相似放大倍数为200×-500×；此外，不同纤维取向的Cf/ sic表现出不同的材料去除机制，从而影响其表面质量。纤维垂直排列的Cf/ sic的加工表面质量最好，而纤维纵向排列的Cf/ sic的加工表面质量最差。

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引用次数: 0

Mechanism and suppression method of grain burial in laser sharpening of bronze-bond diamond wheels 铜结合剂金刚石砂轮激光锐化过程中晶粒埋藏机理及抑制方法

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: 2026-01-24 DOI: 10.1016/j.diamond.2026.113357

Fengrong Luo , Genyu Chen , Wei Zhou , Wei Wang , Longjian Wang , Yinghui Ren , Jie Li

Laser technology is increasingly being applied to the dressing of diamond wheels, not only enabling high profile accuracy but also enhancing its grinding performance. However, diamond wheel is a super-hard composite material, diamond exhibits significantly different thermophysical properties from the bond. This disparity introduces considerable uncertainties in the laser processing of diamond grinding wheels. In this study, the phenomenon of grain burial was first observed in a nanosecond laser sharpening bronze-bonded diamond wheel. Even with sufficient removal depth of the bronze bond, the diamond grains did not protrude as expected but instead ended up below the bond plane. It caused unstable grinding behavior, increased wheel clogging, and reduced grinding quality. Through detailed analysis of the changes in the wheel's surface morphology, the mechanism of laser sharpening was uncovered and the reason for grain burial was identified. This phenomenon is strongly influenced by the laser power input and the differences in thermophysical properties between diamond and bronze. Further increasing the laser power to 30 W, exceeding the theoretical value, effectively addressed the grain burial issue. At last, the subsequent strategy using a 5 W low-power laser cleaning was also proposed to mitigate the associated thermal effects resulting from high power.

激光技术越来越多地应用于金刚石砂轮的修整，不仅提高了金刚石砂轮的精度，而且提高了金刚石砂轮的磨削性能。然而，金刚石砂轮是一种超硬复合材料，金刚石与结合剂表现出明显不同的热物理性质。这种差异给金刚石砂轮的激光加工带来了相当大的不确定性。在这项研究中，首次在纳秒激光锐化青铜结合金刚石砂轮时观察到晶粒埋藏现象。即使铜键有足够的去除深度，钻石颗粒也没有像预期的那样突出，而是最终落在键平面以下。造成磨削性能不稳定，增加砂轮堵塞，降低磨削质量。通过对砂轮表面形貌变化的详细分析，揭示了激光锐化的机理，确定了晶粒埋藏的原因。这种现象受到激光输入功率和金刚石与青铜热物理性质差异的强烈影响。进一步将激光功率提高到30 W，超过理论值，有效地解决了晶粒埋藏问题。最后，还提出了使用5w低功率激光清洗的后续策略，以减轻高功率引起的相关热效应。

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引用次数: 0

Electroluminescent Ag nanoparticles decorated carbon nanotubes–based device for room-temperature NH3 sensing application 电致发光银纳米粒子装饰碳纳米管器件在室温NH3传感中的应用

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: 2026-02-05 DOI: 10.1016/j.diamond.2026.113410

Alisa Saengsonachai , Wiwat Wongkokua , Papichaya Chaisakul , Teerakiat Kerdcharoen , Margit Zacharias , Chatchawal Wongchoosuk

Alternating-current electroluminescence (AC-EL) technologies have recently emerged as promising platforms for multifunctional optoelectronic devices. However, their application in gas sensing remains limited. Herein, we report a dual-function AC-EL device incorporating a silver nanoparticles–decorated carbon nanotubes (AgNPs–CNTs) sensing layer that enables simultaneous light emission and room-temperature ammonia (NH₃) detection. The AgNPs–CNTs, consisting of CNTs with an average diameter of ∼16 nm uniformly decorated with AgNPs of ∼25 nm in diameter, significantly enhance charge transport and electric-field distribution, leading to a 1.6-fold increase in electroluminescent intensity after coating. Upon exposure to NH₃, the device exhibits a clear and reversible decrease in optical luminance. The AgNPs-CNTs based AC-EL device demonstrates linear concentration-dependent sensing over the range of 100–1000 ppm (R² = 0.997), high sensitivity (∼0.026 ppm⁻¹), rapid response–recovery behavior, excellent device-to-device reproducibility, and strong selectivity against common volatile organic compounds and humidity. The sensing mechanism of the AgNPs-CNTs based AC-EL device is proposed via electron donation from NH₃ to the p-type CNTs, modulation of the AgNPs/CNTs metal–semiconductor junctions, and subsequent suppression of excitation processes within the ZnS:Cu,Cl phosphor layer. The results demonstrate a simple, low-cost, and scalable strategy for developing optical gas sensors based on AC-EL architectures. This work establishes AC-EL devices as a promising platform for next-generation visual gas indicators and low-power optoelectronic sensing systems suitable for environmental monitoring, smart packaging, and wearable electronics.

交流电致发光（AC-EL）技术近年来成为多功能光电器件的有前途的平台。然而，它们在气体传感中的应用仍然有限。在此，我们报道了一种双功能AC-EL器件，该器件包含银纳米颗粒装饰的碳纳米管（AgNPs-CNTs）传感层，可以同时进行光发射和室温氨（NH3）检测。由平均直径为~ 16 nm的碳纳米管组成的AgNPs - CNTs均匀地装饰了直径为~ 25 nm的AgNPs，显著增强了电荷输运和电场分布，导致涂层后电致发光强度提高了1.6倍。在暴露于NH3时，器件表现出明显且可逆的光学亮度下降。基于AgNPs-CNTs的AC-EL器件在100-1000 ppm （R2 = 0.997）范围内具有线性浓度依赖性传感，灵敏度高（~ 0.026 ppm−1），响应恢复性能快，器件间重现性好，对常见挥发性有机化合物和湿度具有很强的选择性。基于AgNPs-CNTs的AC-EL器件的传感机制是通过NH3给电子给p型碳纳米管、AgNPs/CNTs金属半导体结的调制以及随后抑制ZnS:Cu，Cl荧光粉层内的激发过程来提出的。结果证明了一种简单、低成本和可扩展的策略，用于开发基于AC-EL架构的光学气体传感器。这项工作建立了交流- el器件作为下一代视觉气体指示器和低功耗光电传感系统的有前途的平台，适用于环境监测，智能包装和可穿戴电子产品。

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引用次数: 0

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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