{"title":"Fabrication of visible-light-driven rGO decorated CeO2/V2O5 nanohybrids for highly enhanced photocatalytic degradation of tetracycline antibiotic","authors":"Muthuraj Arunpandian , Tae Hwan Oh , Karuppaiah Selvakumar","doi":"10.1016/j.diamond.2025.112545","DOIUrl":"10.1016/j.diamond.2025.112545","url":null,"abstract":"<div><div>This research emphasizes on the design, synthesis, and characterization of novel reduced graphene oxide-supported CeO<sub>2</sub>/V<sub>2</sub>O<sub>5</sub> nanocomposites. This ternary CeO<sub>2</sub>/V<sub>2</sub>O<sub>5</sub> with rGO catalysts enhances the effectiveness of visible-light photocatalytic degradation of Tetracycline (TC) in aqueous solution. It also enhances charge transfer and regulates electron-hole recombination during light-harvesting processes. Furthermore, the UV–vis analysis indicates that the rGO-supported catalyst can enhance substantial visible light absorption, alongside facilitating an efficient charge transfer pathway in the CeO<sub>2</sub>/V<sub>2</sub>O<sub>5</sub>@rGO heterostructures. Under visible light irradiation, CeO<sub>2</sub>/V<sub>2</sub>O<sub>5</sub>@rGO heterostructures exhibit a photocatalytic degradation of TC with an enhancement above 94 % compared to other catalysts. The degradation efficiency and kinetic rate constants of TC were 94.65 % and 0.0252 min<sup>−1</sup>, respectively. The superior photocatalytic activity of the CeO<sub>2</sub>/V<sub>2</sub>O<sub>5</sub>@rGO heterostructure is attributed to rGO serving as an electron mediator, facilitating charge separation and diminishing recombination rates. Furthermore, rGO enhanced the surface morphology of the heterostructure and increased the availability of adsorption and reaction sites. The long-term stability of the catalyst was assessed to ensure its stability. Furthermore, liquid chromatography–mass spectrometry was employed to investigate the possible degradation routes. This study offers essential insights into the development of highly effective photocatalysts for environmental applications, presenting a promising strategy for addressing pharmaceutical contaminants in wastewater.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112545"},"PeriodicalIF":4.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298153","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}
Oskay Kahraman , Pınar Küce Cevik , Ersan Turunc , Ayla Çelik , İsmail Koyuncu , Riza Binzet
{"title":"Eco-friendly synthesis and biomedical assessment of graphene nanomaterials using a holoparasitic plant template","authors":"Oskay Kahraman , Pınar Küce Cevik , Ersan Turunc , Ayla Çelik , İsmail Koyuncu , Riza Binzet","doi":"10.1016/j.diamond.2025.112551","DOIUrl":"10.1016/j.diamond.2025.112551","url":null,"abstract":"<div><div>In this study, graphene-based nanomaterials were synthesized using the holoparasitic plant <em>Orobanche aegyptiaca</em>. The successful synthesis and physicochemical properties of the nanomaterials were confirmed through various characterization techniques, including UV–Visible spectroscopy, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and X-ray Photoelectron Spectroscopy (XPS). Antioxidant activity, assessed through multiple in vitro assays, demonstrated moderate efficacy. Antimicrobial studies revealed that the synthesized materials were effective against two bacterial strains and <em>Candida albicans</em>. The minimum inhibitory concentration (MIC₉₉) values against <em>C. albicans</em> were 206.19 μg/mL (GO), 126.30 μg/mL (rGO), 121.15 μg/mL (rGO-AgNCs), 243 μg/mL (rGO-AuNCs), and 210.47 μg/mL (rGO-PdNCs). The generation of reactive oxygen species (ROS) was evaluated via NBT reduction, showing that GO produced the highest ROS (absorbance: 0.15 at 575 nm), followed by rGO-AgNCs (0.14). DNA and protein leakage analyses indicated that rGO-AgNCs caused the most damage, with 77.18 % DNA leakage and 77 % protein leakage from the 15th minute onward. Genotoxicity, analyzed by Comet assay and flow cytometry, revealed significant DNA damage and decreased lymphocyte viability, especially with rGO and rGO-PdNCs, which induced higher levels of apoptosis and necrosis. Cytotoxicity assays conducted on MDA-MB-231 breast cancer cells showed notable cytotoxic effects, with IC₅₀ values ranging from 77.73 to 115.30 μg/mL. In contrast, healthy CRL-4010 cells exhibited higher IC₅₀ values, indicating lower toxicity. Overall, the study highlights the potential of plant-derived graphene-based nanomaterials as multifunctional agents with antimicrobial, antioxidant, genotoxic, and anticancer properties.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112551"},"PeriodicalIF":4.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306419","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}
Natasha Kanwal , Khalid Aziz , Asma Naz , Nadeem Raza , Zeeshan Ali , Mohamed Khairy , Abdelmonaim Azzouz , Anis Ahmad Chaudhary
{"title":"Mechanistic insights into photocatalytic degradation of dyes and pesticides using glucose reduced GO modified with CuCr2O4/SiO2","authors":"Natasha Kanwal , Khalid Aziz , Asma Naz , Nadeem Raza , Zeeshan Ali , Mohamed Khairy , Abdelmonaim Azzouz , Anis Ahmad Chaudhary","doi":"10.1016/j.diamond.2025.112553","DOIUrl":"10.1016/j.diamond.2025.112553","url":null,"abstract":"<div><div>Here, we report a non-toxic approach that incorporates glucose to minimize the potential risks and challenges associated with the chemical reduction of graphene oxide (GO). To improve its capacity to photo catalytically degrade targets (rhodamine B (RhB) and atrazine (AT)) from aqueous solutions, the surface of reduced graphene oxide (rGO) was decorated with CuCr<sub>2</sub>O<sub>4</sub> and SiO<sub>2</sub>. The structural, functional, and optical characteristics of the synthesized nanomaterials were assessed using a range of analytical methods, such as FTIR, Raman, photoluminescence (PL), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer Emmett Teller (BET), and energy dispersive X-ray spectroscopy (EDX). UV–vis spectroscopy corroborated the band gap determination, visible light sensitivity of nanoparticles and to validate the photocatalytic degradation of RhB and AT as well as the optimization of various parameters. Synthesized composite (rGO@SiO<sub>2</sub>/CuCr<sub>2</sub>O<sub>4</sub>) showed excellent quantum yield (7.08 × 10<sup>−7</sup> and 5.36 × 10<sup>−6</sup> molecules photon<sup>−1</sup> for RhB and AT, respectively) and space time yield (2.33 × 10<sup>−10</sup> for RhB and 4.34 × 10<sup>−8</sup> molecules photon<sup>−1</sup> mg<sup>−1</sup> for RhB and AT, respectively) resulting in increased number of pollutant molecules degraded (5.16 × 10<sup>−3</sup> for RhB and 5.25 × 10<sup>−4</sup> for AT). After 60 min of exposure to visible light, rGO@SiO<sub>2</sub>/CuCr<sub>2</sub>O<sub>4</sub> demonstrated excellent performance, with an astounding 98.5 % degradation efficiency for RhB and 97.6 % for AT. This exceptional photocatalytic performance was associated with a substantial rise in photon production (1.11 × 10<sup>24</sup> for RhB and 7.18 × 10<sup>24</sup> for AT). Following six successive degradation cycles, rGO@SiO<sub>2</sub>/CuCr<sub>2</sub>O<sub>4</sub> demonstrated remarkable durability and reusability as a catalyst, retaining a high photodegradation efficiency of 85 % for RhB and 82 % for AT.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112553"},"PeriodicalIF":4.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306420","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}
Hesham Moustafa , Emad M. Ahmed , Mohamed Hemida , Marwa Rabee , Heba Isawi
{"title":"Surface grafting GO nanoplatelets with antimicrobial rosin acids for strengthening photocatalytic of chitosan/gelatin nanocomposites","authors":"Hesham Moustafa , Emad M. Ahmed , Mohamed Hemida , Marwa Rabee , Heba Isawi","doi":"10.1016/j.diamond.2025.112552","DOIUrl":"10.1016/j.diamond.2025.112552","url":null,"abstract":"<div><div>The current research has manifested that graphene-oxide nanoplatelets grafted by natural rosin acids (GO-g-R) to be utilized as an efficient nonmetallic photocatalyst inside chitosan/gelatin (CGe) nanocomposites without requiring metallic materials. Three GO-g-R quantities (i.e., 10, 20, and 30 vol%) were utilized to fabricate the sustainable CGe membranes. Various techniques like XRD and FT-IR spectra were used to ratify the structure of GO and its grafting by R. Other investigations, such as SEM-EDX, mechanical and antibacterial properties, were conducted on the CGe membranes. The obtained data revealed that CGe-GO-g-R30% had excellent tensile strength (i.e., ∼ 96.5 N/mm<sup>2</sup>) and killed the microbes, as compared to CGe-GO-30 %. Cationic and anionic dyes were used as organic pollutants. The effects of temperature, pH, contact time, and dye concentration were investigated. The outcomes manifested that the CGe-GO-g-R30% membrane was the optimum, and its photo-degradation efficiency reached 98.40 %, depending on the dye and light exposure type. The membranes showed superior photocatalytic performance under solar light compared to UV light radiation. The Langmuir model provided a good fit to the adsorption isotherm model, whereas the pseudo-2nd order model better described the kinetics of photocatalytic degradation for selecting dyes into CGe-GO-g-R30% membrane. The recovery and reusability of CGe-GO-g-R30% against the selected dyes were also investigated. The CGe-GO-g-R30% with antibacterial functions are likely to be utilized as economically viable photocatalysts in wastewater purification.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112552"},"PeriodicalIF":4.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306487","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":"Sensitive and selective nitrite sensor based on CuCo2O4-rGO nanocomposite synthesized by one-pot electrochemical method in pastırma","authors":"Pınar Anlar Daldal , Hülya Öztürk Doğan , Kübra Cinar Topcu","doi":"10.1016/j.diamond.2025.112550","DOIUrl":"10.1016/j.diamond.2025.112550","url":null,"abstract":"<div><div>In this study, CuCo₂O₄-rGO nanostructures were synthesized by a one-pot electrochemical method on the surface of Pencil Graphite Electrode (PGE) for nitrite determination in pastırma, a traditional meat product. The developed modified electrode was used to determine the amount of nitrite in pastırma samples obtained from three different brands in the Turkish market. When the nitrite values obtained by the electrochemical method were compared with the spectrophotometric method, they showed 91.20 % to 100 % agreement. In addition, the physicochemical properties of pastırma samples, such as pH, moisture, protein, fat, and ash, were analysed, and it was determined that pH and moisture values are critical parameters for product quality. These results show that the developed electrode provides a practical and sensitive method for nitrite sensing.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112550"},"PeriodicalIF":4.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312782","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}
Onur Yaldır , Şükriye Karabiberoğlu , Çağrı Ceylan Koçak , Emre Yavuz , Kemal Volkan Özdokur , Zekerya Dursun
{"title":"Solvothermal synthesis of ZnV2O6/g-C3N4 composites for high-performance supercapacitors","authors":"Onur Yaldır , Şükriye Karabiberoğlu , Çağrı Ceylan Koçak , Emre Yavuz , Kemal Volkan Özdokur , Zekerya Dursun","doi":"10.1016/j.diamond.2025.112544","DOIUrl":"10.1016/j.diamond.2025.112544","url":null,"abstract":"<div><div>Composite materials formed by combining mixed metal oxides and graphitic carbon nitride have gained significant attention in recent years for energy applications. Here, a novel material was obtained by combining ZnV<sub>2</sub>O<sub>6</sub> mixed metal oxide structure synthesized by the solvothermal method with g-C<sub>3</sub>N<sub>4</sub> prepared by pyrolysis. SEM, XPS, XRD, FTIR, and TGA techniques were employed for comprehensive material characterization. The synthesized ZnV<sub>2</sub>O<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> was then used in supercapacitor studies. The resulting composite material demonstrated a specific capacity of 438 F g<sup>−1</sup> at 1.5 A g<sup>−1</sup> in 6.0 M KOH solution. After 2500 cycles, it retains 96 % of its capacitance, demonstrating excellent cyclic stability. Furthermore, a symmetric supercapacitor device based on ZnV₂O₆/g-C₃N₄ electrodes was assembled and tested, achieving high capacitance retention over extended charge–discharge cycles. The synergistic effect of g-C<sub>3</sub>N<sub>4</sub>, with its large surface area and chemical stability, and ZnV<sub>2</sub>O<sub>6</sub>, with its fast electron transfer ability, has resulted in the formation of the composite with enhanced performance.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112544"},"PeriodicalIF":4.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279360","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}
Muneera Alrasheedi , Tahani M. Alresheedi , Azizah A. Algreiby , Abrar S. Alnafisah , Ajayb Saud Alresheedi , Mohamed Ali Ben Aissa , Laila S. Alqarni , Abueliz Modwi
{"title":"Fabrication of green Co3O4@g-C3N4 nanocomposite for MG dye adsorption","authors":"Muneera Alrasheedi , Tahani M. Alresheedi , Azizah A. Algreiby , Abrar S. Alnafisah , Ajayb Saud Alresheedi , Mohamed Ali Ben Aissa , Laila S. Alqarni , Abueliz Modwi","doi":"10.1016/j.diamond.2025.112532","DOIUrl":"10.1016/j.diamond.2025.112532","url":null,"abstract":"<div><div>Aquatic habitats have faced significant destruction danger for many years due to the manufacture and disposal of organic dyes from diverse textile and paint industries. Significant effort is necessary to address this environmental contamination by the elimination of these dyes. In this study, a green chemistry approach, using the extract of <em>Ocimum basilicum,</em> was employed to prepare a novel cobalt oxide/carbon nitride hybrid material (Co<sub>3</sub>O<sub>4</sub>@g-C<sub>3</sub>N<sub>4</sub>). The synthesized nanosorbent were meticulously examined through several characterization techniques to explore the relationship between their adsorption activity and material properties.</div><div>The synthesized hybrid was utilized as an operative adsorbent for the prompt and highly efficient removal of Methylene green (MG) cationic dye. The adsorption capability of the Co<sub>3</sub>O<sub>4</sub>@g-C<sub>3</sub>N<sub>4</sub> nanocomposite for ciprofloxacin was investigated using a batch experimental method under various conditions. The results demonstrated that the highest adsorption capacity (954 mg. g<sup>−1</sup>) of MG was attained after 240 min of contact time under ideal conditions of pH 7. The equilibrium adsorption data fitted the Langmuir isotherm, and the adsorption kinetic process were found to be a pseudo-second-order model. The vigor adsorption occurred through electrostatic, H-bonding, Lewis acid−base interactions, and π − π stacking. The ultrafast kinetics, great adsorption capacity, and good reusability bestow the hybrid with great potential for eliminating MG dyes from an aqueous environment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112532"},"PeriodicalIF":4.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298152","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":"Graphene quantum dots from pyrolytic condensation of aspartic acid and glycerol for ratiometric fluorosensing of lactic acid in cancer cells","authors":"Seikh Asif , David Morgan , Kamalika Sen","doi":"10.1016/j.diamond.2025.112547","DOIUrl":"10.1016/j.diamond.2025.112547","url":null,"abstract":"<div><div>In this study, strongly luminescent Graphene Quantum Dots (GQDs) of high quantum yield (QY ≈ 46 %) were synthesized by pyrolysis of aspartic acid in glycerol. Here we report the use of GQDs as a fluorescence ratiometric probe towards lactic acid (LA) in both serum and MCF-7 cell lysate medium. A remarkably low limit of detection (LOD) was found in serum medium (0.294 μM) and in MCF-7 cell extract (6.917 μM). Isothermal titration calorimetric studies yielded highly negative (−80.0 kcal mol<sup>−1</sup>) ΔH value in serum medium which suggested exothermic interactions between GQDs and lactic acid. The sensing capacity of the GQDs was further validated in presence of various interfering agents such as ascorbic acid, citric acid, nitrate, phosphate, glucose, cholesterol and uric acid in serum medium. Monitoring the amounts of LA in cancer cells is crucial as LA plays a significant role in the proliferation of cells. We therefore evaluated the performance of our ratiometric probe in measuring the intracellular LA concentration in MCF-7 cell lysate. The calibration curve of LA in MCF-7 cell lysate generated alongside in the concentration range 4.180–42.37 μM helped in accurately identifying the concentration of LA in cancer cells.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112547"},"PeriodicalIF":4.3,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291429","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}
Kun Xie , Kai Feng , Fei Lu , Guoshang Zhang , Pengfei Yue , Bin Cai , Guopeng Zhang , Zhongxia Liu
{"title":"The microstructure and interfacial bonding of the ultrafine-grained nanodiamond reinforced 2024 aluminum matrix composite","authors":"Kun Xie , Kai Feng , Fei Lu , Guoshang Zhang , Pengfei Yue , Bin Cai , Guopeng Zhang , Zhongxia Liu","doi":"10.1016/j.diamond.2025.112549","DOIUrl":"10.1016/j.diamond.2025.112549","url":null,"abstract":"<div><div>On the premise of fabricating uniformly dispersed ND-reinforced 2024Al (ND/2024Al) composites, the detailed microstructure and interfacial bonding of the ultrafine-grained ND/2024Al composite were investigated with the help of SEM, TEM, and the corresponding EDS mapping. Different affecting factors, such as ND's physical characteristics on physical bonding, non-metallic elements (C, O), metal solute elements (Cu, Mg), and their interaction effects on the interface of the ND/2024Al composite were carefully discussed, which are found to be beneficial to the interfacial bonding of ND/2024Al. Meanwhile, the influence of the O element on the interface between diamond and aluminum was evaluated by the first principles calculation, which corresponded well with the experimental results. Our work would promote the development of ND-reinforced aluminum matrix composites (AMCs) and their further application.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112549"},"PeriodicalIF":4.3,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331208","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}
Chengcheng Lv , Chuyan Zhang , Bin Chen , Zhaofeng Zhai , Junyao Li , Yvkun Yan , Tianwen Hu , Haozhe Song , Yvhua Yang , Lusheng Liu , Guihong Song , Nan Huang
{"title":"Revealing the mechanism of boron doping concentration of boron-doped diamond film electrode on the electrochemical oxidative degradation of perfluorooctanoic acid","authors":"Chengcheng Lv , Chuyan Zhang , Bin Chen , Zhaofeng Zhai , Junyao Li , Yvkun Yan , Tianwen Hu , Haozhe Song , Yvhua Yang , Lusheng Liu , Guihong Song , Nan Huang","doi":"10.1016/j.diamond.2025.112548","DOIUrl":"10.1016/j.diamond.2025.112548","url":null,"abstract":"<div><div>Perfluorooctanoic acid (PFOA) is a great threat to personal safety due to its high bond energy and great electronegativity hard to remove and toxicity. The degradation of PFOA by electrochemical oxidation (EO) using boron-doped diamond (BDD) film electrodes is one of the promising technologies in terms of the efficient, environmentally friendly and controllable. In this study, three BDD film electrodes (BDD<sub>20</sub>, BDD<sub>30</sub>, and BDD<sub>40</sub>) with different boron-doped concentrations were used to degrade PFOA by EO. The results show that BDD<sub>40</sub> is the most effective in the removal of both PFOA and total organic carbon (TOC) (∼100 % of PFOA and 92.71 % of TOC were removed after 3 h). The concentration of ·OH was examined by electron paramagnetic resonance (EPR), and it was found that the highest ·OH were produced in BDD<sub>40</sub>, with a concentration of 4.468 × 10<sup>11</sup> spins/mm<sup>3</sup> at 40 min. Through the quenching experiment, the roles of <span><math><mspace></mspace><msubsup><mi>SO</mi><mn>4</mn><mrow><mo>•</mo><mo>–</mo></mrow></msubsup></math></span> and ·OH have been investigated, respectively. Namely, <span><math><mspace></mspace><msubsup><mi>SO</mi><mn>4</mn><mrow><mo>•</mo><mo>–</mo></mrow></msubsup></math></span> is involved in decarboxylation, while ·OH is used for defluorination. The results and discussion will contribute to a better understanding of the degradation mechanism of PFOA and expand the application of BDD film electrodes in EO, which will ultimately mitigate the risk of PFOA to the environment and health.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112548"},"PeriodicalIF":4.3,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331206","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}