Diamond and Related Materials最新文献

{"title":"Tunable co-precursor synthesis of graphitic carbon nitride for photocatalytic hydrogen peroxide production, tetracycline degradation, and toxicity evaluation","authors":"Dang Thanh Cong Minh ,&nbsp;Nguyen Thuy Diem Thao ,&nbsp;Pham Minh Son ,&nbsp;Tran Nguyen Cam Nhung ,&nbsp;Tran Dang Khoa ,&nbsp;Phan Quang Huy Hoang ,&nbsp;Ta Dang Khoa ,&nbsp;Nguyen Huu Hieu","doi":"10.1016/j.diamond.2026.113440","DOIUrl":"10.1016/j.diamond.2026.113440","url":null,"abstract":"<div><div>Graphitic carbon nitride (CN) has emerged as a promising metal-free photocatalyst for environmental remediation and clean energy production. In this study, CN materials were synthesized from urea combined with melamine, dicyandiamide, and ammonium thiocyanate via a simple pyrolysis method. Structural, morphological, and optical properties were analyzed using X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy, UV–Vis diffuse reflectance spectroscopy, and electron spin resonance spectroscopy (ESR). Among the prepared samples, 10UM-CN exhibited outstanding photocatalytic activity toward tetracycline (TC) degradation and photocatalytic hydrogen peroxide (H₂O₂) production. Specifically, 10UM-CN achieved a TC removal efficiency of approximately 94% TC removal (10 ppm, 100 mL), with a kinetic rate constant k = 0.0375 min⁻¹ in 75 min and produced over 74.27 mM g⁻¹ h⁻¹ of H₂O₂ after 30 min of light irradiation. Mechanistic investigations combined with ESR analysis revealed that photogenerated electrons and superoxide radicals were the dominant reactive oxygen species. Electrochemical analyses, including electrochemical impedance spectroscopy, photocurrent response, and linear sweep voltammetry, confirmed enhanced charge transport, reduced recombination, and the H₂O₂ production pathway following a two-step single-electron reduction mechanism. In addition, the reusability and stability of 10UM-CN were evaluated through four consecutive cycles of photocatalytic TC degradation, demonstrating consistent performance and structural stability. Moreover, the toxicity of the antibiotic solution after photodegradation was investigated using deoxyribonucleic acid (DNA) cleavage analysis and toxicity prediction tools. This study provides a facile and effective strategy for improving the photocatalytic efficiency of CN by combining compatible precursors, offering a practical approach for the development of metal-free photocatalysts for environmental remediation and sustainable energy production.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113440"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147421428","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}

{"title":"Facile synthesis of mesoporous ZnCo2O4 anchored on coffee ground/orange peel-derived carbon as an advanced electrode for energy storage","authors":"Yu-Cheng Chang,&nbsp;Shao-Ru Chang","doi":"10.1016/j.diamond.2026.113363","DOIUrl":"10.1016/j.diamond.2026.113363","url":null,"abstract":"<div><div>The escalating global energy demand and the intermittency of renewable energy sources necessitate the urgent development of sustainable, high-performance energy storage systems, such as supercapacitors. This study aims to engineer a novel hybrid electrode by integrating a redox-active bimetallic oxide with a sustainable biomass-derived carbon scaffold to overcome the energy density limitations of conventional carbon materials. A green and cost-effective strategy was developed to synthesize a CGOP@ZnCo₂O₄ composite by coupling coffee ground/orange peel-derived carbon (CGOP) with ZnCo₂O₄ nanostructures via a wet-chemical route and thermal annealing. The biocarbon framework, derived from sustainable biomass, provides a highly conductive network and an abundance of oxygen- and nitrogen-containing functional groups that facilitate uniform growth and strong interfacial bonding of ZnCo₂O₄. Systematic optimization of the annealing temperature and precursor ratios revealed that the composite prepared at 450 °C with 0.134 mmol Zn(NO₃)₂ and 1.33 mmol Co(NO₃)₂ exhibited a hierarchically porous and well-crystallized architecture. This structural synergy between mesoporous biocarbon and crystalline ZnCo₂O₄ enables rapid ion diffusion and efficient charge transport, resulting in an outstanding specific capacitance of 556.1 F/g at 1 A/g and excellent cycling stability, with 81.1% retention after 5000 cycles. Furthermore, the reduced charge-transfer resistance and pseudocapacitive behavior confirm the improved electrochemical kinetics of the optimized composite. This work demonstrates an environmentally benign route for constructing a high-performance ZnCo₂O₄-based electrode through effective biocarbon coupling, offering a promising pathway for sustainable and scalable energy storage applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113363"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036767","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}

{"title":"Enhanced β-phase formation and multifunctional properties of PVDF-HFP/PMMA/graphene oxide nanocomposite films for potential energy harvesting applications","authors":"Khadija Oumghar ,&nbsp;Said Douhi ,&nbsp;Mounir El Achaby ,&nbsp;Mohamed Rguiti ,&nbsp;Omar Cherkaoui ,&nbsp;Adil Eddiai","doi":"10.1016/j.diamond.2026.113432","DOIUrl":"10.1016/j.diamond.2026.113432","url":null,"abstract":"<div><div>Flexible nanocomposite films based on poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/Polymethylene metacrylate PMMA blend were synthesized by incorporating graphene oxide (GO) nanosheets through a simple solution-blending route. The introduction of GO using PMMA as a compatibilizer induced strong molecular interactions within the polymer matrix, promoting the conversion of the non-polar α-phase into the electroactive β-phase. X-ray diffraction and FTIR analyses demonstrated a gradual suppression of α-phase peaks and a corresponding increase in β-phase intensity beyond 0.5 wt% GO loading. Differential scanning calorimetry revealed a shift in the glass transition temperature toward higher values, indicating stronger interfacial coupling and enhanced thermal stability. The optimized nanocomposite exhibited improved dielectric constant and mechanical strength, confirming the influence of PMMA–GO on phase transition and structural reinforcement. These results suggest that PMMA–GO functions effectively as both a nucleating and compatibilizing agent, facilitating chain alignment and dipole orientation in PVDF-HFP. Overall, the developed films display combined structural, dielectric, and thermal improvements, indicating their strong potential for future electromechanical and energy harvesting technologies, although no device-level validation was carried out in this study.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113432"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147421690","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}

{"title":"High pressure synthesis and boron distribution of boron-doped nano-polycrystalline diamond","authors":"Fumihide Sakano ,&nbsp;Kazuhiro Ikeda ,&nbsp;Koji Kuramochi ,&nbsp;Takuya Sasaki ,&nbsp;Ken Niwa ,&nbsp;Norimasa Nishiyama ,&nbsp;Yutaka Kobayashi ,&nbsp;Masashi Hasegawa","doi":"10.1016/j.diamond.2026.113311","DOIUrl":"10.1016/j.diamond.2026.113311","url":null,"abstract":"<div><div>Boron-doped nano-polycrystalline diamond (B-NPD) was attempted to be synthesized at 15 GPa and 2000 °C using a Kawai-type high-pressure generation apparatus. Two B-NPD black and opaque samples of which grain sizes were 98 ± 8 and 119 ± 10 nm, were successfully prepared. Their boron concentrations inspected by secondary ion mass spectroscopy (SIMS) were 568 ± 11 and 3301 ± 34 ppm, respectively, while the values calculated by the substitutional lattice expansion model using their lattice parameters (0.356746(1) and 0.356763(1) nm) were lower, 530 ± 39 and 863 ± 39 ppm, respectively. Synchrotron X-ray diffraction measurements of these samples exhibited no peaks of the carbon materials and boron‑carbon compounds. STEM-EELS analysis revealed that boron atoms in the higher boron-concentration sample were clearly segregated at grain boundaries where the sp² state of carbon is enhanced. Present and previous studies indicate that the distribution of boron in diamond materials is affected by the presence of defective areas, such as grain boundaries and twin boundaries.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113311"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075437","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}

{"title":"Development of Fe2O3/RGO nanocomposite infused with CTAB surfactant modified glassy carbon electrode for ultrasensitive determination of promethazine hydrochloride","authors":"Amruta Patri ,&nbsp;Mallika S. Wali ,&nbsp;Manjunath B. Megalamani ,&nbsp;Manojna R. Nayak ,&nbsp;Lokesh Bheemayya ,&nbsp;Sharanappa T. Nandibewoor ,&nbsp;Ashok M. Sajjan ,&nbsp;Ravindra R. Kamble","doi":"10.1016/j.diamond.2026.113387","DOIUrl":"10.1016/j.diamond.2026.113387","url":null,"abstract":"<div><div>A glassy carbon electrode modified with a metal oxide-reduced graphene oxide nanocomposite infused with CTAB (Fe₂O₃/RGO/CTAB@GCE) was engineered to enable the precise and sensitive electrochemical determination of promethazine hydrochloride (PMH). Fe₂O₃ and RGO nanocomposites were produced by hydrothermal and chemical processes respectively, and characterized in detail using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Electrochemical impedance spectroscopy (EIS) assessed material performance. Cyclic voltammetry (CV) and square wave voltammetry (SWV) were utilized to study the electrochemical behaviour and determination of PMH at the Fe₂O₃/RGO/CTAB@GCE. The modified electrode exhibited an enlarged electroactive surface area, strong adsorption capacity, and synergistic electrocatalytic activity towards PMH oxidation. Critical experimental parameters including electrolyte pH, nanocomposite loading, preconcentration potential, and time were systematically optimized to maximize analytical performance. Under optimized conditions, the sensor displayed a linear detection range from 6.0 nmol L⁻¹ to 0.01 μmol L⁻¹, with detection and quantification limits of 0.36 and 1.21 nmol L⁻¹ respectively. The designed sensing platform demonstrated high sensitivity, excellent reproducibility, and practical applicability for PMH determination in urine, water and pharmaceutical samples.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113387"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185440","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}

{"title":"A tunable multifunctional multimodal graphene-vanadium dioxide metasurface enabling fabry-perot transmission, reflective polarization conversion, and multiband absorption","authors":"Hiranmay Mistri ,&nbsp;Anumoy Ghosh ,&nbsp;Abdur Rahaman Sardar","doi":"10.1016/j.diamond.2026.113431","DOIUrl":"10.1016/j.diamond.2026.113431","url":null,"abstract":"<div><div>This article presents a novel design of a tunable, broadband, multifunctional, and multimodal device incorporating vanadium dioxide (VO₂) and graphene for terahertz (THz) applications. The proposed device offers excellent dynamic control under both voltage and temperature variations. Depending on the operating phase of VO₂, it functions as a broadband reflection-type linear-to-circular polarization converter (LTCPC), a broadband Fabry-Perot transmission-type linear-to-cross polarization converter (LTLPC), and a multiband absorber. The metasurface unit cell consists of a diagonally mounted elliptical graphene monolayer on a silicon dioxide (SiO₂) substrate. The backplane is made of VO₂, allowing switching between reflective and transmissive operation. In the metallic phase of VO₂, the device operates as an LTCPC from 2.05 THz to 3.88 THz, i.e., a fractional bandwidth (FBW) of 61.72%, as well as a dual-band absorber featuring sharp absorption peaks of 100% and 90.83% at 1.78 THz and 3.28 THz, respectively. In the insulating phase of VO₂, the device operates as a Fabry-Perot resonator and provides LTLPC from 1.74 THz to 2.90 THz, i.e., 50% FBW, as well as a single-band absorber with an absorption peak of 85.28% at 1.67 THz. In the intermediate phase, where the conductivity of VO₂ is approximately 21,700 S/m, the device operates as a dual-band absorber with a wideband response from 1.59 THz to 1.77 THz, and from 2.37 THz to 3.53 THz, i.e., 10.71% and 39.32% FBW, respectively. The LTCPC and LTLPC operations exhibit angular stability for incident angles up to 50° and 40°, respectively. For multimodal and multifunctional capabilities, the proposed device demonstrates excellent prospects for integration into communication systems, sensing, and imaging in the terahertz applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113431"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185643","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}

{"title":"Facile synthesis and electrochemical behavior of CoWO4@C@MnOx nanocomposite electrode material as a high-performance supercapacitor","authors":"Rabia Shahid ,&nbsp;Hira Afzal ,&nbsp;Usman Zubair ,&nbsp;Muhammad Imran Yousaf","doi":"10.1016/j.diamond.2026.113403","DOIUrl":"10.1016/j.diamond.2026.113403","url":null,"abstract":"<div><div>In electrochemical applications, supercapacitors are widely used. Although the synthesis of MnO_x as a nanocomposite material has been well-documented, creating an MnOx electrode with high energy density remains challenging. In this work, an electrode of CoWO4@C@MnOx was fabricated using hydrothermal, deposition, and condensation methods. In this nanocomposite, CoWO₄ enhanced conductivity and facilitated rapid charge transmission, because the Cobalt tungstate possesses higher electric conductivity 10⁻⁷–10⁻³ Scm⁻², which shows excellent catalytic efficiency in comparison to pristine or mixed metal oxide compounds. The tungstate may also increase the conductivity in comparison to pure cobalt oxide, while C prevented agglomeration and provided a good surface area. X-ray diffraction spectroscopy (XRD) and SEM were used to study the CoWO₄@C@MnO_x nanocomposite crystal structure and structural morphologies. The electrochemical behavior of CoWO₄@C@MnO_x was studied through GCD and cyclic voltammetry in 1 M (Na₂SO₄) electrolyte solution with a current density of 2 A/g, obtaining the highest specific capacitance of 450 F/g with energy density (24.0 Whkg⁻¹) and power density (2000 Wkg⁻¹). The ternary composite shows the 450 F/g specific capacitance, and the specific capacitance of pristine cobalt tungstate is 300, and CoWO₄@C is 380, which is 1.5× higher in comparison to pristine CoWO₄ and binary composite CoWO₄@C. The CoWO₄@C@MnO_x electrode shows 5000 cycles with over 96% retention. The CoWO_4, CoWO₄@C, and CoWO₄@C@MnO_x have crystalline sizes of 18 nm, 20 nm, and 23 nm, respectively, which are increased due to the concentration of CoWO₄ and C in MnO_x. The SEM image shows a needle-like particle (70–130 nm) long and 50 nm in diameter. Cobalt Tungstate increases the conductivity and porosity, and the conductive carbon stops agglomeration. The synthesis shows an improvement in electrode mobility.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113403"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184806","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}

{"title":"Activating the quantum capacitance of C24 Nanocages for supercapacitors through B/N substitution and 3d transition metal doping (ScZn) - a DFT perspective","authors":"Divyakaaviri Subramani ,&nbsp;Akilesh Muralidharan ,&nbsp;Shamini Pazhani Beena ,&nbsp;Shankar Ramasamy","doi":"10.1016/j.diamond.2026.113398","DOIUrl":"10.1016/j.diamond.2026.113398","url":null,"abstract":"<div><div>Supercapacitors offer high power output and long cycle life, but their limited energy density necessitates the development of novel electrode materials with enhanced quantum capacitance (C_Q) and surface charge storage (Q) capability. Hence, this study employs density functional theory (DFT) to investigate C_Q, electronic structure, and Q behavior of C₂₄ nanocages and their B- and N- substituted derivatives (C₂₃B, and C₂₃N denoted as CB and CN). Unlike earlier studies on 2D carbon structures or larger fullerenes, this work provides the first systematic evaluation of the smaller C₂₄ nanocage as a supercapacitor electrode material. To further enhance C_Q and Q performance, 3d transition metals (TMs) (Sc<img>Zn) are introduced through doping. Structural stability is confirmed via cohesive and binding energy calculations, with Ti-doped systems being the most robust. Charge density difference maps and Bader analysis demonstrate significant charge transfer from dopant metals to the cage, while partial density of states reveal 3d-2p orbital hybridization as the origin of improved C_Q. The bare C₂₄, CB, and CN cages show peak C_Q values of 158, 127, and 114 μF/cm², respectively. Upon doping, C_Q increased to 169 μF/cm² (C/Sc), 163 μF/cm² (CB/Zn), and 171 μF/cm² (CN/Cr). Remarkably, CN/Ti and CN/V maintain high C_Q even at zero bias, an unusal behavior in carbon-based electrodes that highlights their promise for low-voltage applications. By establishing C₂₄ based nanocages as a previously unexplored yet tunable platform, this work provides fundamental insights into d-orbital-mediated capacitance enhancement and positions these nanostructures as strong candidates for next-generation supercapacitor electrodes.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113398"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146184800","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}

{"title":"Synergistic photoelectrochemical polishing of polycrystalline diamond for high-efficiency atomic-level finishing","authors":"Qingjie Zheng,&nbsp;Jiaxin Yu,&nbsp;Liwei Ou,&nbsp;Tao He,&nbsp;Xianwen Zheng","doi":"10.1016/j.diamond.2026.113381","DOIUrl":"10.1016/j.diamond.2026.113381","url":null,"abstract":"<div><div>Polycrystalline diamond (PCD), known for its exceptional thermal conductivity, is an ideal material for heat dissipation in semiconductor devices. However, its extreme hardness and chemical inertness pose significant challenges in achieving high efficiency and superior surface quality. To address this, this study introduces an innovative approach: Ultraviolet-assisted Photoelectrochemical Chemical Mechanical Polishing (UV-PECMP) using boron-doped diamond (BDD). Under UV illumination, the BDD electrode generates a synergistic effect, enabling continuous and efficient production of high-concentration hydroxyl radicals. These radicals induce uniform and effective chemical oxidation on the PCD surface, which complements mechanical abrasion to facilitate material removal. The feasibility of this method is systematically evaluated through hydroxyl radical trapping tests, oxidation experiments, and polishing trials. Experimental results confirm that the proposed technique enables stable and efficient generation of ·OH, leading to effective surface oxidation of PCD. Combined with mechanical action, this method achieves an ultra-smooth surface with roughness values as low as Sa = 1.43 nm, Sz = 40.35 nm, and a high material removal rate (MRR = 690.8 nm/h). This work demonstrates the feasibility of the proposed method and provides a novel solution for ultra-precision machining of diamond materials.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113381"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185254","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}

{"title":"Pressure-induced formation of spherical boron nitride nanopowders with small size","authors":"Xiangming Che ,&nbsp;Kuo Zhang ,&nbsp;Shuhuan Wang ,&nbsp;Tengchao Gao ,&nbsp;Guolong Ni ,&nbsp;Qun Li","doi":"10.1016/j.diamond.2026.113420","DOIUrl":"10.1016/j.diamond.2026.113420","url":null,"abstract":"<div><div>Spherical hexagonal boron nitride (h-BN) has garnered significant attention due to its excellent chemical stability, high specific surface area, and isotropic properties. However, it is still a challenge to precisely control the spherical shape and size. Herein, a high-efficiency and novel approach was developed to synthesize spherical h-BN nanostructure by low temperature combined with high pressure. The effects of pressure, holding time, and raw material ratios on the morphology and structure of spherical h-BN were systemically investigated. Multiple characterization techniques were used to characterize the obtained h-BN. The results demonstrate that the structural ordering and particle size can be precisely tuned by pressure, holding time, and raw material ratios. Compared to atmospheric pressure, can effectively improve the crystallinity and promote the formation of spherical h-BN nanostructures. Benefiting the synergistic effect between high pressure and low temperature, the synthesized spherical h-BN exhibits an ideal morphology with small particle size, excellent uniformity and a high degree of sphericity. Besides, the h-BN product is highly crystalline and show good thermal stability even at the lower synthesis temperature (900 °C). In addition, the formation mechanism of h-BN nanosphere is explored. It reveals that the high-pressure has a significant promoting effect on the formation of h-BN nanospheres. Besides, sodium metaborate (Na₂O) from the decomposition of borax has a skeleton effect, which can enhance the reaction to produce h-BN products. This study will provide new insights into the preparation of high-quality spherical h-BN nanopowders.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113420"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185257","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}