Rechargeable zinc-ion hybrid supercapacitors (ZHSCs) are a promising next-generation energy storage technology due to their low cost, high energy density, safety, and cycle durability. However, their practical applications are hindered by low energy density, primarily governed by the properties of the cathode materials and electrolytes. Here, we report a sustainable strategy to prepare seaweed-derived nitrogen-doped porous carbon nanosheets (SNPCNs) as high-performance cathodes. Nitrogen doping creates abundant electroactive sites, improves electrolyte wettability, and accelerates Faradaic reactions. In addition, introducing a small amount of redox additive (0.05 M ZnI₂) into the aqueous ZnSO₄ electrolyte significantly boosts charge storage via additional redox reactions. Benefiting from this synergistic electrode and electrolyte design, the Zn//3 M ZnSO₄ + 0.05 M ZnI₂//SNPCN cell achieves a high specific capacitance of 340 F g−1 at 0.1 A g−1, with energy densities of 109.48 Wh kg−1. The device also shows excellent cycling stability, retaining 75% capacitance after 1500 cycles. A practical four-cell, 6.4 V device successfully powered multiple LEDs for over 42 min, demonstrating strong energy delivery. This work provides a green, cost-effective route to heteroatom-doped porous carbon for advanced, sustainable zinc-ion energy storage systems.
可充电锌离子混合超级电容器（ZHSCs）具有低成本、高能量密度、安全性和循环耐久性等优点，是一种很有前途的新一代储能技术。然而，它们的实际应用受到低能量密度的阻碍，主要是由正极材料和电解质的性质决定的。在这里，我们报告了一种可持续的策略来制备海藻衍生的氮掺杂多孔碳纳米片（SNPCNs）作为高性能阴极。氮掺杂产生了丰富的电活性位点，提高了电解质的润湿性，加速了法拉第反应。此外，在硫酸锌水溶液中加入少量氧化还原添加剂（0.05 M ZnI 2）可通过附加氧化还原反应显著提高电荷的存储能力。得益于这种协同电极和电解质设计，Zn//3 M ZnSO₄+ 0.05 M ZnI₂//SNPCN电池在0.1 a g−1时获得了340 F g−1的高比电容，能量密度为109.48 Wh kg−1。该器件还具有优异的循环稳定性，在1500次循环后保持75%的电容。一个实用的四电池，6.4 V器件成功地为多个led供电超过42分钟，展示了强大的能量输送。这项工作为先进的、可持续的锌离子储能系统提供了一种绿色、经济的杂原子掺杂多孔碳途径。
{"title":"Sustainable seaweed-derived nitrogen-doped porous carbon cathodes with redox-active electrolytes for high-performance zinc-ion hybrid supercapacitors","authors":"Priyadarshini Venkatachalam , Nagaraj Murugan , D.S. Aditya , Karmegam Dhanabalan , Mani Arivazhagan , Jaroon Jakmunee , Sethumathavan Vadivel , S.K. Nataraj , Yoong Ahm Kim","doi":"10.1016/j.diamond.2026.113342","DOIUrl":"10.1016/j.diamond.2026.113342","url":null,"abstract":"<div><div>Rechargeable zinc-ion hybrid supercapacitors (ZHSCs) are a promising next-generation energy storage technology due to their low cost, high energy density, safety, and cycle durability. However, their practical applications are hindered by low energy density, primarily governed by the properties of the cathode materials and electrolytes. Here, we report a sustainable strategy to prepare seaweed-derived nitrogen-doped porous carbon nanosheets (SNPCNs) as high-performance cathodes. Nitrogen doping creates abundant electroactive sites, improves electrolyte wettability, and accelerates Faradaic reactions. In addition, introducing a small amount of redox additive (0.05 M ZnI₂) into the aqueous ZnSO₄ electrolyte significantly boosts charge storage via additional redox reactions. Benefiting from this synergistic electrode and electrolyte design, the Zn//3 M ZnSO₄ + 0.05 M ZnI₂//SNPCN cell achieves a high specific capacitance of 340 F g<sup>−1</sup> at 0.1 A g<sup>−1</sup>, with energy densities of 109.48 Wh kg<sup>−1</sup>. The device also shows excellent cycling stability, retaining 75% capacitance after 1500 cycles. A practical four-cell, 6.4 V device successfully powered multiple LEDs for over 42 min, demonstrating strong energy delivery. This work provides a green, cost-effective route to heteroatom-doped porous carbon for advanced, sustainable zinc-ion energy storage systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113342"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001708","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}
Improving the properties of drilling fluids is the most important step to upgrade the performance of drilling wells. One of the ways to further enhance the characteristics of drilling fluids is the use of nanomaterial additives. This paper presents the results of a comprehensive experimental study on the effect of additives of single-walled carbon nanotubes (SWCNT) on the main functional characteristics of hydrocarbon-based drilling fluids. The influence of the hydrocarbon phase content (from 50 to 80 vol%) on the properties of drilling fluids modified with 0.1 wt% single-walled carbon nanotubes has been examined for the first time. The influence of the SWCNT additive on the effective viscosity, rheology and microrheology, thixotropic and creep recovery, oscillatory viscoelastic properties, aging and colloidal stability, filtration losses, coefficient of friction of drilling fluids has been studied. The research results have shown that the addition of SWCNT may significantly enhance key functional characteristics such as gel strength and colloidal stability of drilling fluids in a wide range of varying concentrations of the hydrocarbon phase. This makes single-walled carbon nanotubes a universal tool for controlling the functional properties of various hydrocarbon drilling fluids in various operating conditions. This improvement is attributed to the formation of a bulk elastic network, as quantitatively demonstrated by enhanced rheological moduli and stability.
{"title":"The effect of adding single-walled carbon nanotubes on the functional characteristics of drilling fluids with different hydrocarbon phase contents","authors":"A.V. Minakov , A.D. Skorobogatova , E.I. Lysakova , S.D. Kazanina , M.I. Pryazhnikov","doi":"10.1016/j.diamond.2026.113344","DOIUrl":"10.1016/j.diamond.2026.113344","url":null,"abstract":"<div><div>Improving the properties of drilling fluids is the most important step to upgrade the performance of drilling wells. One of the ways to further enhance the characteristics of drilling fluids is the use of nanomaterial additives. This paper presents the results of a comprehensive experimental study on the effect of additives of single-walled carbon nanotubes (SWCNT) on the main functional characteristics of hydrocarbon-based drilling fluids. The influence of the hydrocarbon phase content (from 50 to 80 vol%) on the properties of drilling fluids modified with 0.1 wt% single-walled carbon nanotubes has been examined for the first time. The influence of the SWCNT additive on the effective viscosity, rheology and microrheology, thixotropic and creep recovery, oscillatory viscoelastic properties, aging and colloidal stability, filtration losses, coefficient of friction of drilling fluids has been studied. The research results have shown that the addition of SWCNT may significantly enhance key functional characteristics such as gel strength and colloidal stability of drilling fluids in a wide range of varying concentrations of the hydrocarbon phase. This makes single-walled carbon nanotubes a universal tool for controlling the functional properties of various hydrocarbon drilling fluids in various operating conditions. This improvement is attributed to the formation of a bulk elastic network, as quantitatively demonstrated by enhanced rheological moduli and stability.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113344"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075443","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}
Pub Date : 2026-01-16DOI: 10.1016/j.diamond.2026.113343
Youssef Miyah , Mohammed Benjelloun , Omar Boualam , Souad El Alami , Fatiha Mejbar , Ibtissam Bouabadi , Abdelilah Merabti , Noureddine El Messaoudi , Mouslim Messali , Ashraf M. Al-Msiedeen , Sanae Lairini
Sheep horn activated carbon with KOH (SHAC) proved to be an effective adsorbent for removing Crystal Violet (CV) and Congo Red (CR). Fourier Transform Infrared (FTIR) analyses confirmed the presence of –OH, –SH, CC, CN, NH, and COO functional groups derived from keratin, while Thermogravimetric Analysis coupled with Differential Thermal Analysis (TGA/DTA) revealed the decomposition of oxidized proteins and the crystallization of KOH-bound water. For CV, the optimal adsorption equilibrium efficiency reached 98.62% at [CV] = 40 mg L−1, dose = 1.25 g L−1, pH = 10, contact time = 50 min; adsorption followed the Langmuir and pseudo-first-order models, indicating physisorption with increasing disorder. For CR, the maximum equilibrium adsorption is 73.89% at [CR] = 40 mg L−1, adsorbent dose = 1.25 g L−1, pH = 2, contact time = 50 min following Temkin, Freundlich, and pseudo-first-order kinetics, reflecting endothermic physisorption. The Artificial Neural Network (ANN) models perform excellently (R2 = 0.965, MSE = 2.9374 for CV, and R2 = 0.9718, MSE = 4.963 for CR), and Box Behnken Design (BBD) confirms their validity (ANOVA p-value = 0.0038 for CV, 0 for CR, Cook's distance <0.2). Density Functional Theory (DFT) calculations show that CV (ΔE = 1.735 eV, S = 0.567 eV, ω = 9.175 eV) is more reactive than CR (ΔE = 2.833 eV, η = 1.416 eV). Electrostatic potential (ESP) maps and Fukui indices identify nitrogen atoms, aromatic carbon atoms, and –SO3− and –N=N– groups as active sites. After 5 thermal regeneration cycles, SHAC retains 69% of its capacity for CV and 23% for CR. The adsorption cost is estimated at $0.32 L−1, confirming the efficiency, durability, and cost-effectiveness of SHAC.
{"title":"Toxic dyes adsorption using sheep horn activated carbon: Mechanism, DFT study, artificial neural network, Box–Behnken modeling, and cost estimation","authors":"Youssef Miyah , Mohammed Benjelloun , Omar Boualam , Souad El Alami , Fatiha Mejbar , Ibtissam Bouabadi , Abdelilah Merabti , Noureddine El Messaoudi , Mouslim Messali , Ashraf M. Al-Msiedeen , Sanae Lairini","doi":"10.1016/j.diamond.2026.113343","DOIUrl":"10.1016/j.diamond.2026.113343","url":null,"abstract":"<div><div>Sheep horn activated carbon with KOH (SHAC) proved to be an effective adsorbent for removing Crystal Violet (CV) and Congo Red (CR). Fourier Transform Infrared (FTIR) analyses confirmed the presence of –OH, –SH, C<img>C, C<img>N, N<img>H, and COO functional groups derived from keratin, while Thermogravimetric Analysis coupled with Differential Thermal Analysis (TGA/DTA) revealed the decomposition of oxidized proteins and the crystallization of KOH-bound water. For CV, the optimal adsorption equilibrium efficiency reached 98.62% at [CV] = 40 mg L<sup>−1</sup>, dose = 1.25 g L<sup>−1</sup>, pH = 10, contact time = 50 min; adsorption followed the Langmuir and pseudo-first-order models, indicating physisorption with increasing disorder. For CR, the maximum equilibrium adsorption is 73.89% at [CR] = 40 mg L<sup>−1</sup>, adsorbent dose = 1.25 g L<sup>−1</sup>, pH = 2, contact time = 50 min following Temkin, Freundlich, and pseudo-first-order kinetics, reflecting endothermic physisorption. The Artificial Neural Network (ANN) models perform excellently (R<sup>2</sup> = 0.965, MSE = 2.9374 for CV, and R<sup>2</sup> = 0.9718, MSE = 4.963 for CR), and Box Behnken Design (BBD) confirms their validity (ANOVA <em>p</em>-value = 0.0038 for CV, 0 for CR, Cook's distance <0.2). Density Functional Theory (DFT) calculations show that CV (ΔE = 1.735 eV, S = 0.567 eV, ω = 9.175 eV) is more reactive than CR (ΔE = 2.833 eV, η = 1.416 eV). Electrostatic potential (ESP) maps and Fukui indices identify nitrogen atoms, aromatic carbon atoms, and –SO<sub>3</sub><sup>−</sup> and –N=N– groups as active sites. After 5 thermal regeneration cycles, SHAC retains 69% of its capacity for CV and 23% for CR. The adsorption cost is estimated at $0.32 L<sup>−1</sup>, confirming the efficiency, durability, and cost-effectiveness of SHAC.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113343"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036664","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}
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.
{"title":"Ultralight and multidimensional chitosan-based aerogel composites with an enhanced microwave absorption performance","authors":"Mahdieh Dehghani-Dashtabi, Hoda Hekmatara, Masoud Mohebbi","doi":"10.1016/j.diamond.2026.113333","DOIUrl":"10.1016/j.diamond.2026.113333","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113333"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075440","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}
Color transformations of yellow type Ib synthetic diamond subjected to high dose electron irradiation followed by annealing at moderate temperatures have been studied. Neutral vacancies and interstitial-vacancy complexes unstable to high temperature are shown to be the major intrinsic defects underlying the process of the color transformations, which are distinguished by two annealing stages: at about 300–400 °C for interstitial-vacancy complexes and 750–850 °C for vacancies. It has been found that annealing at temperatures from 550 to 650 °C may result in total removal of yellow color. This discoloration is explained by the conversion of neutral nitrogen C-defects into positively charged N+ defects, partial annealing of neutral vacancies (GR1 centers) and disappearance of the broad absorption 2 eV band (maximum at a wavelength 630 nm), which is attributed to neutral vacancies interacting with nearby interstitials (interstitial-vacancy complexes). Annealing at temperatures above 650 °C produces purple color in areas with high nitrogen concentration due to dominating NV− defects, and yellow color in areas with low nitrogen concentration due to dominating NV0 defects.
{"title":"Color evolution of type Ib synthetic diamonds after high dose electron irradiation followed by low-temperature annealing","authors":"N.M. Kazuchits , V.N. Kazuchits , M.S. Rusetsky , A.M. Zaitsev","doi":"10.1016/j.diamond.2026.113334","DOIUrl":"10.1016/j.diamond.2026.113334","url":null,"abstract":"<div><div>Color transformations of yellow type Ib synthetic diamond subjected to high dose electron irradiation followed by annealing at moderate temperatures have been studied. Neutral vacancies and interstitial-vacancy complexes unstable to high temperature are shown to be the major intrinsic defects underlying the process of the color transformations, which are distinguished by two annealing stages: at about 300–400 °C for interstitial-vacancy complexes and 750–850 °C for vacancies. It has been found that annealing at temperatures from 550 to 650 °C may result in total removal of yellow color. This discoloration is explained by the conversion of neutral nitrogen C-defects into positively charged N<sup>+</sup> defects, partial annealing of neutral vacancies (GR1 centers) and disappearance of the broad absorption 2 eV band (maximum at a wavelength 630 nm), which is attributed to neutral vacancies interacting with nearby interstitials (interstitial-vacancy complexes). Annealing at temperatures above 650 °C produces purple color in areas with high nitrogen concentration due to dominating NV<sup>−</sup> defects, and yellow color in areas with low nitrogen concentration due to dominating NV<sup>0</sup> defects.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113334"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001709","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}
Pub Date : 2026-01-16DOI: 10.1016/j.diamond.2026.113339
Ou Zhang , Fang Jiao , Gang-Qin Liu , Sichen Mi , Feng Luo
Fabrication of nanostructures in single-crystal diamond is of crucial importance for various applications in sensing, optics, electronics, microelectromechanical systems (MEMS), etc. However, it is not trivial to achieve some design requirements of these nanostructures in fabrication processes, especially when certain device concepts require high aspect-ratio (HAR), exact tapering angle, or sharp edge/tip radius. We devise and demonstrate a top-down process flow leveraging self-aligned patterning technique that allows us to fabricate stepped conical nanopillars with height ranging from 3 to 5.5 μm, and tip radius from 5 to 200 nm. This stepped structure can be designed and manufactured for enhanced stiffness or for extended aspect ratio depending on device requirements. The fabrication process is applicable for standard wafer-level MEMS foundries, and could be readily used for the fabrication of scanning probes, electron emission electrodes, nanoindenter tips, etc., with high uniformity and repeatability in a scaled up fashion.
{"title":"Self-aligned patterning process for high aspect-ratio nanostructuring in single-crystal diamond","authors":"Ou Zhang , Fang Jiao , Gang-Qin Liu , Sichen Mi , Feng Luo","doi":"10.1016/j.diamond.2026.113339","DOIUrl":"10.1016/j.diamond.2026.113339","url":null,"abstract":"<div><div>Fabrication of nanostructures in single-crystal diamond is of crucial importance for various applications in sensing, optics, electronics, microelectromechanical systems (MEMS), etc. However, it is not trivial to achieve some design requirements of these nanostructures in fabrication processes, especially when certain device concepts require high aspect-ratio (HAR), exact tapering angle, or sharp edge/tip radius. We devise and demonstrate a top-down process flow leveraging self-aligned patterning technique that allows us to fabricate stepped conical nanopillars with height ranging from 3 to 5.5 μm, and tip radius from 5 to 200 nm. This stepped structure can be designed and manufactured for enhanced stiffness or for extended aspect ratio depending on device requirements. The fabrication process is applicable for standard wafer-level MEMS foundries, and could be readily used for the fabrication of scanning probes, electron emission electrodes, nanoindenter tips, etc., with high uniformity and repeatability in a scaled up fashion.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113339"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001764","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}
Pub Date : 2026-01-16DOI: 10.1016/j.diamond.2026.113331
Ting Xue , Kai Zhang , Yu Wang , Lingrong Kong
This study systematically evaluated the tribological behaviors of polycrystalline diamond compact (PDC) when paired with various materials in high temperature drilling fluid. The results demonstrated that PDC/Si3N4 exhibited excellent overall performance under high temperature, with both the coefficient of friction and wear rate being significantly lower than those at room temperature. This phenomenon was attributed to an effective wear-oxidation lubrication mechanism: high temperature promoted the formation of a composite synergistic film consisting of both oxide layer and carbonaceous material. In contrast, although PDC/steel showed reduced the coefficient of friction under high temperature, this was accompanied by an increased wear rate. The decrease in the coefficient of friction primarily originated from decreased shear strength due to material softening and improved graphitization degree within the transfer layer. However, high temperature also aggravated both oxidation processes and adhesive wear. Coupled with the corrosion induced by Cl− in the drilling fluid, multiple failure mechanisms interacted synergistically, leading to accelerated wear.
{"title":"Tribological behavior of polycrystalline diamond compact in high temperature drilling fluid: Revealing the wear-oxidation/corrosion synergistic effect","authors":"Ting Xue , Kai Zhang , Yu Wang , Lingrong Kong","doi":"10.1016/j.diamond.2026.113331","DOIUrl":"10.1016/j.diamond.2026.113331","url":null,"abstract":"<div><div>This study systematically evaluated the tribological behaviors of polycrystalline diamond compact (PDC) when paired with various materials in high temperature drilling fluid. The results demonstrated that PDC/Si<sub>3</sub>N<sub>4</sub> exhibited excellent overall performance under high temperature, with both the coefficient of friction and wear rate being significantly lower than those at room temperature. This phenomenon was attributed to an effective wear-oxidation lubrication mechanism: high temperature promoted the formation of a composite synergistic film consisting of both oxide layer and carbonaceous material. In contrast, although PDC/steel showed reduced the coefficient of friction under high temperature, this was accompanied by an increased wear rate. The decrease in the coefficient of friction primarily originated from decreased shear strength due to material softening and improved graphitization degree within the transfer layer. However, high temperature also aggravated both oxidation processes and adhesive wear. Coupled with the corrosion induced by Cl<sup>−</sup> in the drilling fluid, multiple failure mechanisms interacted synergistically, leading to accelerated wear.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113331"},"PeriodicalIF":5.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036766","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}
Pub Date : 2026-01-15DOI: 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.
{"title":"Research on diamond deposition doped with B and Sn by laser irradiation in MPCVD and its electrochemical properties","authors":"Bochun Li , Kesheng Guo , Yuxiang Xu , Bin He , Xiaodong Guo , Yinghao Xuan , Lang Hu , Qiang Hu , Wei Dai , Qimin Wang","doi":"10.1016/j.diamond.2026.113328","DOIUrl":"10.1016/j.diamond.2026.113328","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113328"},"PeriodicalIF":5.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001767","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}
Pub Date : 2026-01-15DOI: 10.1016/j.diamond.2026.113324
J. Sebastin Anitha , Govindhasamy Murugadoss , Nachimuthu Venkatesh , R. Ragu , J. Emima Jeronsia
The escalating demand for advanced wastewater treatment strategies has catalysed the development of next-generation photocatalytic materials capable of concurrently degrading organic pollutants and inactivating microbial pathogens. This work presents the hydrothermal synthesis of a reduced graphene oxide/BiFeO3 (rGO/BF) nanocomposite for dual photocatalytic and antibacterial environmental remediation. The photocatalytic performance of the as-synthesized rGO/BF nanocomposite was systematically investigated by varying catalyst dosages (0.2 g/L, 0.3 g/L and 0.4 g/L). Notably, the 0.3 g/L dosage exhibited optimal activity, achieving an impressive 95.8% degradation of 20 ppm methyl orange (MO) under visible light irradiation within 120 min. Kinetic analysis based on pseudo first order model revealed that rGO/BF photocatalyst shows a rate constant (k) value of 0.0467 min−1 with a high correlation coefficient (R2 = 0.9629). The bactericidal efficacy of the rGO/BF nanocomposite was systematically assessed using the well diffusion method against both Gram-positive bacteria - Bacillus subtilis, Staphylococcus aureus, and Bacillus cereus and Gram-negative strains including Pseudomonas aeruginosa, Vibrio cholerae, and Klebsiella pneumonia. Remarkably, the rGO/BF nanocomposite manifest better antibacterial activity against Staphylococcus aureus, with a substantial zone of inhibition measuring
15.5 mm. The rGO/BF nanocomposite demonstrates improved visible-light photocatalytic and antibacterial performance, highlighting its potential for multifunctional environmental remediation.
{"title":"Dual functional rGO/BiFeO3 nanocomposites for efficient visible light photocatalysis and bactericidal performance","authors":"J. Sebastin Anitha , Govindhasamy Murugadoss , Nachimuthu Venkatesh , R. Ragu , J. Emima Jeronsia","doi":"10.1016/j.diamond.2026.113324","DOIUrl":"10.1016/j.diamond.2026.113324","url":null,"abstract":"<div><div>The escalating demand for advanced wastewater treatment strategies has catalysed the development of next-generation photocatalytic materials capable of concurrently degrading organic pollutants and inactivating microbial pathogens. This work presents the hydrothermal synthesis of a reduced graphene oxide/BiFeO<sub>3</sub> (rGO/BF) nanocomposite for dual photocatalytic and antibacterial environmental remediation. The photocatalytic performance of the as-synthesized rGO/BF nanocomposite was systematically investigated by varying catalyst dosages (0.2 g/L, 0.3 g/L and 0.4 g/L). Notably, the 0.3 g/L dosage exhibited optimal activity, achieving an impressive 95.8% degradation of 20 ppm methyl orange (MO) under visible light irradiation within 120 min. Kinetic analysis based on pseudo first order model revealed that rGO/BF photocatalyst shows a rate constant (k) value of 0.0467 min<sup>−1</sup> with a high correlation coefficient (R<sup>2</sup> = 0.9629). The bactericidal efficacy of the rGO/BF nanocomposite was systematically assessed using the well diffusion method against both Gram-positive bacteria - <em>Bacillus subtilis</em>, <em>Staphylococcus aureus</em>, and <em>Bacillus cereus</em> and Gram-negative strains including <em>Pseudomonas aeruginosa</em>, <em>Vibrio cholerae</em>, and <em>Klebsiella pneumonia.</em> Remarkably, the rGO/BF nanocomposite manifest better antibacterial activity against <em>Staphylococcus aureus</em>, with a substantial zone of inhibition measuring</div><div>15.5 mm. The rGO/BF nanocomposite demonstrates improved visible-light photocatalytic and antibacterial performance, highlighting its potential for multifunctional environmental remediation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113324"},"PeriodicalIF":5.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036768","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}
Pub Date : 2026-01-15DOI: 10.1016/j.diamond.2026.113332
Li-Yong Chen , Zheng-Hui Wang , Yan-Yan Liu , Su-Fang Wang , Yu-Ling Song
Efficient methane (CH4) decomposition is of fantastic importance for energy transition and environmental protection. In this paper, we explored the dehydrogenation reactions of CH4 on the clean twin T-graphene (TTG) and TM-doped TTG (TM@TTG, TM = Fe, Pd, and Pt), using the first-principles methods. It is found that the doping of TM facilitates the activation and dehydrogenation of CH4. On the TTG surface, both CH2 and CH dissociation steps probably are rate-limiting step, while the rate-controlling step may be the CH2 dissociation for the continuous dehydrogenation of CH4 molecule on the TM@TTG surfaces. Furthermore, the analysis of transition state reveals that, different from other system where consecutive dehydrogenation of CH4 is expected to be achieved, methyl has the potential to form C2H6 rather than undergoing further dissociation in the case of Pt@TTG substrate. The impact of temperature on the CH4 dehydrogenation on TM@TTG is also explored. The results suggest that the dehydrogenation of CH4 on TTG surface can be significantly modulated via a moderate doping of transition metals, and provide a new perspective to design the decomposition process of CH4 molecule.
{"title":"Controllable dehydrogenation process of CH4 on twin T-graphene substrate","authors":"Li-Yong Chen , Zheng-Hui Wang , Yan-Yan Liu , Su-Fang Wang , Yu-Ling Song","doi":"10.1016/j.diamond.2026.113332","DOIUrl":"10.1016/j.diamond.2026.113332","url":null,"abstract":"<div><div>Efficient methane (CH<sub>4</sub>) decomposition is of fantastic importance for energy transition and environmental protection. In this paper, we explored the dehydrogenation reactions of CH<sub>4</sub> on the clean twin T-graphene (TTG) and TM-doped TTG (TM@TTG, TM = Fe, Pd, and Pt), using the first-principles methods. It is found that the doping of TM facilitates the activation and dehydrogenation of CH<sub>4</sub>. On the TTG surface, both CH<sub>2</sub> and CH dissociation steps probably are rate-limiting step, while the rate-controlling step may be the CH<sub>2</sub> dissociation for the continuous dehydrogenation of CH<sub>4</sub> molecule on the TM@TTG surfaces. Furthermore, the analysis of transition state reveals that, different from other system where consecutive dehydrogenation of CH<sub>4</sub> is expected to be achieved, methyl has the potential to form C<sub>2</sub>H<sub>6</sub> rather than undergoing further dissociation in the case of Pt@TTG substrate. The impact of temperature on the CH<sub>4</sub> dehydrogenation on TM@TTG is also explored. The results suggest that the dehydrogenation of CH<sub>4</sub> on TTG surface can be significantly modulated via a moderate doping of transition metals, and provide a new perspective to design the decomposition process of CH<sub>4</sub> molecule.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113332"},"PeriodicalIF":5.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036886","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}
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