Diamond and Related Materials最新文献

{"title":"Efficient Al(OH)3@Al2O3 combined with g-C3N4 nanostructures for oxytetracycline elimination","authors":"Mohamed R. Elamin ,&nbsp;Mohamed Ali Ben Aissa ,&nbsp;Babiker Y. Abdulkhair ,&nbsp;Suzan Makawi ,&nbsp;Abuzar Albadri ,&nbsp;Abueliz Modwi","doi":"10.1016/j.diamond.2025.112752","DOIUrl":"10.1016/j.diamond.2025.112752","url":null,"abstract":"<div><div>Synthetic organic materials, such as antibiotics, are significant organic contaminants in wastewater; their treatment is crucial yet problematic. A novel class of g-C₃N₄ nanocomposites is a viable platform for removing oxytetracycline, an antibiotic contaminant. In this work, Al(OH)₃@Al₂O₃@g-C₃N₄ nanocomposite was created and tested as a sorbent to improve pharmaceutical wastewater treatment processes for oxytetracycline (OTC). The produced nanocomposite was characterized and identified using sophisticated techniques, including XRD, FTIR, XPS, UV, SEM-EDX, and TEM. The results of the assessment showed that the nanostructures had improved phase purity. The effects of operational factors on the adsorption process were investigated, including pH, OTC concentration, and nanostructure dose. Results indicated that nanosorbent removed 89.4 % of oxytetracycline at a concentration of 5 ppm. The performance of this nanosorbent was enhanced to 322.5 mg·g⁻¹ by adjusting the working parameters via experimental design. Compared to other methods reported in the literature, the use of Al(OH)₃@Al₂O₃@g-C₃N₄ for OTC removal offers several advantages, including adsorption modeling, removal effectiveness, and adsorption mechanisms.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112752"},"PeriodicalIF":5.1,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860658","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":"Efficient detection of selective nitrite using Y2O3/BaO-graphene oxide nanocomposites by differential pulse voltammetry for environmental application","authors":"Mohsin Saeed ,&nbsp;Abdullah N. Alotaibi ,&nbsp;Hadi M. Marwani ,&nbsp;Mohammad Abu Jafar Mazumder ,&nbsp;Abdullah Al-Dakhil ,&nbsp;Amjad E. Alsafrani ,&nbsp;Nouf M. Alourfi ,&nbsp;Mohammed Muzibur Rahman","doi":"10.1016/j.diamond.2025.112741","DOIUrl":"10.1016/j.diamond.2025.112741","url":null,"abstract":"<div><div>This work reports a sensitive electrochemical sensor to determine nitrite (NO₂⁻) detection, modified glassy carbon electrode (GCE) with newly synthesized Y₂O₃/BaO-GO nanocomposite (NCs). The NCs were prepared using a solid-state process and deposited on the GCE using a 5 % Nafion binder to enhance the conductivity and stability. Its structural, morphological, and elemental characterization was confirmed by energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). Differential Pulse Voltammetry (DPV) was employed to analyze the performance of the sensor in a phosphate buffer solution at a pH of 5.7, and a linear range of nitrite concentrations was 5–3000 μM with a sensitivity of 0.06322 μAμM⁻¹ cm⁻¹. The limits of detection (LOD) and limit of quantification (LOQ) were 3.4 μM and 11.3 μM, respectively. Stability and repeatability tests presented the reliability of the sensor. The high sensitivity, low detection limits, and good stability of the Y₂O₃/BaO-GO NCs/Nafion/GCE-based sensor make it a promising tool for environmental monitoring.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112741"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886050","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":"Wavelength-dependent femtosecond laser-induced structural changes in ultra-nanocrystalline diamond studied by Raman spectroscopy","authors":"Asma Soltaniandehkordi ,&nbsp;László Himics ,&nbsp;Váczi Tamás Attila ,&nbsp;Miklós Veres","doi":"10.1016/j.diamond.2025.112746","DOIUrl":"10.1016/j.diamond.2025.112746","url":null,"abstract":"<div><div>In this study, the structural changes occurring in an ultra-nanocrystalline diamond film upon femtosecond (fs) laser irradiation at two different wavelengths and a broad range of power levels were systematically analyzed using ultraviolet (UV) Raman spectroscopy. The alterations in the Raman spectrum with varying laser wavelength and power were analyzed in terms of the positions of the diamond and graphitic bands, as well as the diamond-to-graphitic (I_diamond/I_G) and disordered-to-graphitic (I_D/I_G) band intensity ratios. The Raman peak parameters were found to depend on both variables, revealing that even a relatively small irradiation photon energy difference results in distinct structural transformations, highlighting the sensitivity of the material to irradiation conditions. These structural changes were evaluated in detail, and the structural breakdown power thresholds of the femtosecond lasers were also determined.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112746"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851933","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":"Synthesis and investigation of a graphene oxide grafted with copolymer of acrylic acid and acrylamide for shale hydration inhibition","authors":"Momodou A. Jallow ,&nbsp;Abeer Alarawi ,&nbsp;Tawfik A. Saleh","doi":"10.1016/j.diamond.2025.112721","DOIUrl":"10.1016/j.diamond.2025.112721","url":null,"abstract":"<div><div>Wellbore instability is often caused by chemical interactions between clay stabilizer fluids and shales; therefore, selecting the proper hydration inhibition fluid is essential for effective clay inhibition treatment. Thus, it is crucial to develop a high-temperature stabilizing inhibitor that prevents clay hydration. Using free radical polymerization, a copolymer of acrylic acid and acrylamide graphene oxide composite was synthesized to provide a high thermal stability inhibitor for clay hydration. With graphene oxide added, the inhibitor will be more thermally stable, preventing polymer degradation at high temperatures. The Composite inhibitory properties at high temperature were investigated using standard methods such as anti-swelling ratio, and shale recovery test. The pristine copolymer, poly (acrylic acid-<em>co</em>-acrylamide) was also synthesized, and its inhibitory properties were compared to the polymer graphene oxide composite. Pure polymer and the polymer composite showed shale recovery of 82 % and 85 %, respectively, demonstrating that both inhibitors prevented shale-cutting disintegration and improved the rheology of shale formations. Pure polymer and polymer composite inhibit expansion and hydration with anti-swelling ratios of 80 and 82 %, suggesting that the inhibitors are effective at suppressing bentonite swelling. Contact angle, Fourier transform infrared spectroscopy, Scanning electron microscope, and X-ray diffraction results indicate that the polymer forms a protective film, adsorbed onto the surface of the bentonite by electrostatic attraction, thereby making the surface more hydrophobic. Therefore, both Pure polymer and polymer composite prevent hydration and swelling of bentonite by preventing water molecules from invading the interlayer spacing. According to Thermogravimetric Analysis results, the polymer composite is highly stable at 200 °C, making it an excellent clay hydration inhibitor at high temperatures. The prepared materials exhibit similar inhibitory properties since their chemical compositions are identical.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112721"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892268","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":"Computational prediction of a novel superhard tetragonal carbon allotrope featuring all-sp3 (4+5+6+7+8)-membered rings","authors":"Ze-Qing Guo ,&nbsp;Jian-Li Ma ,&nbsp;Wei-Wen Wang ,&nbsp;Jian-Ping Zhou","doi":"10.1016/j.diamond.2025.112742","DOIUrl":"10.1016/j.diamond.2025.112742","url":null,"abstract":"<div><div>Exploring novel superhard carbon allotropes represents a significant research domain in condensed matter physics and materials science. In this study, a novel superhard tetragonal carbon allotrope (termed tp-C64) was identified through the integration of crystal structure prediction methods and first-principles calculations. The new carbon phase crystallizes in the <em>P</em>4/<em>ncc</em> space group (No. 130), featuring a primitive unit cell containing 64 atoms with unique three-dimensional connectivity through all-<em>sp</em>³-hybridized (4+5+6+7+8)-membered rings. Its stability was validated through relative enthalpy analysis, first-principles molecular dynamics (AIMD), phonon dispersion spectra, and elastic stability criteria. Remarkably, tp-C64 exhibits a calculated bulk modulus of 367 GPa and Vickers hardness of 57 GPa, classifying it as a novel superhard material with notable mechanical properties for advanced engineering applications. Electronic structure analysis reveals wide-band-gap semiconducting behavior (indirect gap: 3.88 eV), while theoretically simulated XRD patterns provide characteristic fingerprints for experimental identification.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112742"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860554","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":"Green synthesis of S/P dual-heteroatom-doped walnut shell-based porous carbon for supercapacitor electrode materials","authors":"Jiangyu Wu ,&nbsp;Jianghua Wu ,&nbsp;Yuwen Xue ,&nbsp;Yunwu Zheng ,&nbsp;Jingyan Liu ,&nbsp;Xu Lin ,&nbsp;Fulin Yang ,&nbsp;Yuan Zou ,&nbsp;Can Liu","doi":"10.1016/j.diamond.2025.112739","DOIUrl":"10.1016/j.diamond.2025.112739","url":null,"abstract":"<div><div>This study develops an environmentally friendly method to create S/P dual-doped porous carbon (WSC-SP-800) from walnut shells for supercapacitor electrodes. Compared with the raw carbon materials, WSC-SP-800 exhibits higher specific surface area, richer microporous and mesoporous structures, as well as superior electrochemical performance. The specific surface area rises from 1533.40 m² g⁻¹ to 3061.96 m² g⁻¹, and the capacitance increases from 156 F g⁻¹ to 417 F g⁻¹ at a current density of 0.5 A g⁻¹. Additionally, WSC-SP-800 maintains a capacitance of 270 F g⁻¹ even at a high current density of 10 A g⁻¹. When assembled into a symmetric supercapacitor, it achieves an energy density of 13.15 Wh kg⁻¹ at a power density of 250 W kg⁻¹ and retains 100 % of its capacity after 5000 cycles. This work not only achieves cost-effective, high-performance energy storage with environmentally benign characteristics but also establishes a novel paradigm for the valorization of biowaste through heteroatom engineering, providing a sustainable pathway for supercapacitor development.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112739"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851870","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":"Engineered TiO2/WO3/multi-walled carbon nanotube nanocomposites for the removal of heavy metals from irrigation wastewater","authors":"Jimoh Oladejo Tijani ,&nbsp;Baba Isaac Alhamdu ,&nbsp;Ambali Saka Abdulkareem ,&nbsp;Saheed Mustapha ,&nbsp;Abdulsalami Sani Kovo ,&nbsp;Oluwatosin Kudirat Shittu ,&nbsp;Yahaya Ahmed Iyaka","doi":"10.1016/j.diamond.2025.112740","DOIUrl":"10.1016/j.diamond.2025.112740","url":null,"abstract":"<div><div>This study focused on the synthesis, characterization, and adsorption performance of hybrid TiO₂/WO₃/multi-walled nanotubes (MWCNTs) nanocomposites for the removal of cadmium (Cd), chromium (Cr), and manganese (Mn) from irrigation wastewater. TiO₂ and WO₃ nanoparticles were prepared through a green synthesis method, and MWCNTs were produced by catalytic chemical vapor deposition (CCVD). The hybrid nanocomposite (TiO₂/WO₃/MWCNTs) was synthesized using wet-impregnation method at various weight percent mixing ratios (1:1:1, 1:2:1, 1:1:2, and 2:1:1). The synthesized materials were characterized using XRD, HRSEM, HRTEM coupled with EDX, SAED, FTIR, and BET. The characterized samples exhibited the growth of highly crystalline, dispersed nanocomposites with excellent surface area and the development of porosity with the addition of MWCNTs. Optimal removal efficiencies of Cd, Cr, and Mn were found to be 96.8 %, 99.4 %, and 94.7 %, respectively. Adsorption isotherm studies revealed that the process followed the Langmuir model, indicating monolayer adsorption with maximum adsorption capacities (<span><math><msub><mi>q</mi><mi>max</mi></msub></math></span>) of 98.67 mg/g for Cd, 102.11 mg/g for Cr, and 95.32 mg/g for Mn. Kinetic studies revealed that adsorption followed a pseudo-second-order model, and the intraparticle diffusion studies suggested a synergy between external mass transfer and pore diffusion. Thermodynamic values confirmed the endothermic and non-spontaneous nature of the adsorption process, in which positive ∆H values and negative ∆G values indicated feasibility and higher potential for adsorption at high temperatures. These findings justify the novel TiO₂/WO₃/MWCNTs nanocomposites as an economical, sustainable, and recycled adsorbent in wastewater treatment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112740"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893916","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":"Deep learning-based detection of dislocation defects in 4H-SiC substrates via enhanced photoluminescence imaging","authors":"Lu-lu Yu ,&nbsp;Yi-Hang Qiu ,&nbsp;Heng Wang ,&nbsp;Zhen-zhong Wang ,&nbsp;Zhi-li Hu","doi":"10.1016/j.diamond.2025.112745","DOIUrl":"10.1016/j.diamond.2025.112745","url":null,"abstract":"<div><div>This paper introduces a methodology for the detection of dislocation defects in silicon carbide (SiC) substrates through the application of photoluminescence (PL) imaging technology in conjunction with the you only look once (YOLO) object detection algorithm. Dislocation defects in 4H-SiC substrates have a considerable influence on the device performance, thereby necessitating accurate and rapid detection methods. However, the identification of these defects in PL images is often complicated by their low contrast and indistinct boundaries. In this study, image enhancement methods were applied to improve the quality of PL images, while the YOLO11-OBB (Oriented Bounding Box) model was used to effectively detect and localize basal plane dislocations (BPDs) in 4H-SiC substrates. The experimental results demonstrated notable improvements in defect detection and localization. Additionally, the use of the class-balanced multi-sampling (CBMS) technique enhances the distribution of classes within the dataset, thereby increasing the model's ability to identify minority defects such as BPDs. This study offers an innovative strategy for the efficient nondestructive detection of dislocation defects in 4H-SiC substrates and highlights the advantages of combining deep learning techniques with image enhancement methods.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112745"},"PeriodicalIF":5.1,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864934","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":"Binder-free high-pressure, high-temperature surface-porous boron-doped polycrystalline diamond for electrochemical degradation of organic pollutants","authors":"Keke He,&nbsp;Menghua Wu,&nbsp;Weixia Shen,&nbsp;Chao Fang,&nbsp;Xun Yang,&nbsp;Ye Wang,&nbsp;Yuewen Zhang,&nbsp;Liangchao Chen,&nbsp;Qianqian Wang,&nbsp;Biao Wan,&nbsp;Zhuangfei Zhang","doi":"10.1016/j.diamond.2025.112744","DOIUrl":"10.1016/j.diamond.2025.112744","url":null,"abstract":"<div><div>This study reports a cost-effective strategy for fabricating binder-free, boron-doped polycrystalline diamond (B-PCD) with a surface porous structure. A novel high-temperature, high-pressure (HPHT) technique is used in the fabrication process. Under HPHT conditions, cobalt (Co) served as the catalyst, facilitating diamond-diamond (D<img>D) bond growth between industrial-sized boron-doped diamond (BDD) particles. Electrochemical characterization in 0.1 mol/L H₂SO₄ reveals a wide potential window of 3.35 V and an electron transfer coefficient of 0.493, indicating excellent electrochemical reversibility. Notably, the BDD electrode achieves 98.6 % degradation of 100 mg/L Acid Red S (ARS) within 30 min and complete degradation within 60 min. Additionally, the chemical oxygen demand (COD) decreases by 81.98 % in 60 min and reaches 0 mg/L after 120 min. In contrast to conventional chemical vapor deposition polycrystalline diamond (CVD-PCD), this substrate-free PCD eliminates the issue of diamond-substrate separation through bonding collection. The process enables a simple, periodic, and low-cost preparation method with promising potential for electrochemical applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112744"},"PeriodicalIF":5.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864933","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":"Thermal-activated long-persistent luminescence in diamond for wide-range contactless thermometry with extreme environments tolerance","authors":"Jia-Lu Liu ,&nbsp;Jing-Nan Hao ,&nbsp;Yu Lan,&nbsp;Xiao-Nan Lai,&nbsp;Yi-Ge Lv,&nbsp;Yi-Jun Ma,&nbsp;Hao Zhang,&nbsp;Guang-Song Zheng,&nbsp;Run-Wei Song,&nbsp;Qing Lou,&nbsp;Cheng-Long Shen,&nbsp;Chong-Xin Shan","doi":"10.1016/j.diamond.2025.112737","DOIUrl":"10.1016/j.diamond.2025.112737","url":null,"abstract":"<div><div>Optical thermometry has been extensively applied in various scenarios because of its high spatial resolution and contactless type. However, the reported optical thermometers always suffer the limitations of instability or non-stationary under diverse extreme environment. Herein, thermal-activated dual-emissive long-persistent luminescent diamonds with the unique three-level system are prepared via a heteroatom doping strategy. An optical thermometer is established with the dual-emission luminescent diamonds, exhibiting excellent thermometric performance with a broad temperature range from 77 K to 500 K and a high sensitivity of 30.72 % K⁻¹ through the ratio of luminescent intensity, which surpasses that of other optical nanothermometers. In addition, a diamond-based contactless temperature visualization system integrated with wireless alarm functionality has been realized to monitor harsh environment temperature like strong acidic (pH &lt; 0) and alkaline (pH &gt; 14) circumstances, providing promising potential in temperature monitoring in industrial chemical production and catalytic process. This work provides a novel approach for developing wide-range, highly sensitive optical thermometers and offers deep insights into the design of extreme environment-tolerated thermal visualization system.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"159 ","pages":"Article 112737"},"PeriodicalIF":5.1,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860655","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}