Diamond and Related Materials最新文献_第3页

Study on the wear of diamond wire saw in cutting granite 金刚石线锯切割花岗岩的磨损研究

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-06-01 Epub Date: 2026-05-25 DOI: 10.1016/j.diamond.2026.113785

Yihe Liu , Yufei Gao , Hui Dong , Dameng Cheng

{"title":"Study on the wear of diamond wire saw in cutting granite","authors":"Yihe Liu , Yufei Gao , Hui Dong , Dameng Cheng","doi":"10.1016/j.diamond.2026.113785","DOIUrl":"10.1016/j.diamond.2026.113785","url":null,"abstract":"<div><div>Diamond wire saws are gradually being used for cutting granite slabs. However, due to the high hardness and the interaction between its internal components of granite, the wear of diamond tool is an issue that deserves attention. This study conducted diamond wire saw cutting granite experiments with three sets of process parameters selected within the range of industrial production. The investigation focused on the changes in the wear morphology of diamond abrasives and diamond wire sawing performance, as well as the sawn surface morphology, surface roughness (<em>R</em>a) and surface waviness peak-to-valley (PV). The wear evolution curve and wear mechanisms of the saw wire under different parameter combinations were determined, along with the identification of the stable wear interval. The results indicate that the diamond wire saw experiences continuous wear during the cutting process. Its abrasives primarily undergo the stages of nickel coating wear, abrasive wear, followed by abrasives dulling and pull-out. The bow angle of the saw wire initially decreases and then increases during the cutting process. During the stable wire wear period, the reduction in its outer contour diameter is smaller. As the service time of diamond wire gradually increases, the slice surface morphology first improves and then deteriorates. Correspondingly, <em>R</em>a and PV value also exhibit an initial decrease followed by a subsequent increase. The diamond wear is affected by process parameters. The findings of this study provide experimental references for research on diamond wire wear in cutting granite.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113785"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168611","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}

引用次数: 0

Surface functionalization of multi-walled carbon nanotubes with phenylene diamine and melamine: A strategy for enhanced antimicrobial and selective anti-cancer activities 多壁碳纳米管的苯二胺和三聚氰胺表面功能化：一种增强抗菌和选择性抗癌活性的策略

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-06-01 Epub Date: 2026-05-13 DOI: 10.1016/j.diamond.2026.113756

Ayşe Kılınç , Aybek Yiğit

{"title":"Surface functionalization of multi-walled carbon nanotubes with phenylene diamine and melamine: A strategy for enhanced antimicrobial and selective anti-cancer activities","authors":"Ayşe Kılınç , Aybek Yiğit","doi":"10.1016/j.diamond.2026.113756","DOIUrl":"10.1016/j.diamond.2026.113756","url":null,"abstract":"<div><div>This work reports the synthesis and biological evaluation of two novel nanomaterials, PDA-MWCNT (<em>p</em>-phenylenediamine-functionalized multi-walled carbon nanotubes) and its modified derivative, PDA-MWCNT@TPA-M, obtained by coating with a terephthalaldehyde–melamine polymeric network <em>via</em> Schiff base condensation, for their potential as selective anticancer and broad-spectrum antimicrobial agents. The synthesized nanomaterials were characterized using FT-IR, FESEM-EDAX, TEM, XRD, BET, zeta potential, DLS, and Raman analyses, and were further evaluated for their <em>in vitro</em> cytotoxicity against human lung cancer (A549) and normal human dermal fibroblast (HDF) cell lines, as well as their antimicrobial activity against a panel of Gram-positive bacteria, Gram-negative bacteria, and fungal strains. Cytotoxicity studies demonstrated that PDA-MWCNT@TPA-M exhibited a favorable selective toxicity profile, showing relatively low cytotoxicity toward normal HDF cells while inducing significant dose-dependent cytotoxic effects in A549 cancer cells. Furthermore, antimicrobial evaluations revealed varying levels of effectiveness across microbial strains. PDA-MWCNT@TPA-M significantly outperformed PDA-MWCNT, particularly against Gram-positive bacteria such as <em>Bacillus subtilis</em>, <em>Staphylococcus aureus</em>, and <em>Enterococcus faecalis</em>, with statistically significantly larger inhibition zones observed. In contrast, little or no activity was detected against <em>Pseudomonas aeruginosa</em> and <em>Candida albicans</em>. These findings highlight the potential of these modified nanomaterials as promising therapeutic candidates with a preliminary differential cytotoxic profile favoring cancer cells over normal fibroblasts (SI > 1.76), warranting further optimization and targeted antibacterial activity, warranting further investigation for biomedical applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"166 ","pages":"Article 113756"},"PeriodicalIF":5.1,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148168617","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}

引用次数: 0

Cu-Mo dual-doped carbon nitride with excellent peroxidase-like activity for portable colorimetric quantifying D-penicillamine 具有优异过氧化物酶样活性的Cu-Mo双掺杂氮化碳用于便携式比色法定量d -青霉胺

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-26 DOI: 10.1016/j.diamond.2026.113681

Xianfeng Ma , Huiying Dai , Luyao Zhao , Xiaolan Liang , Xiuquan Xu , Xiaofeng Yu

{"title":"Cu-Mo dual-doped carbon nitride with excellent peroxidase-like activity for portable colorimetric quantifying D-penicillamine","authors":"Xianfeng Ma , Huiying Dai , Luyao Zhao , Xiaolan Liang , Xiuquan Xu , Xiaofeng Yu","doi":"10.1016/j.diamond.2026.113681","DOIUrl":"10.1016/j.diamond.2026.113681","url":null,"abstract":"<div><div>D-Penicillamine (D-PA), a sulfur-containing amino acid, is used to treat various diseases such as Wilson's disease, fibrotic lung disease, and cystinuria. However, excessive intake of D-PA can cause adverse effects, necessitating the development of accurate quantitative detection methods. This study aimed to establish a visual colorimetric method for D-PA detection using a synthesized Cu-Mo dual-doped carbon nitride nanomaterial (<strong>Cu</strong>-<strong>Mo</strong>-<strong>VC</strong>-<strong>CN</strong>). The synthesis capitalizes on the simplicity and cost-effectiveness of a one-pot thermal polymerization reaction, utilizing only inexpensive and commercially available precursors, namely copper chloride, ammonium molybdate, urea, and vitamin C. The material exhibited exceptional peroxidase-like activity, catalyzing the oxidation of TMB by H<sub>2</sub>O<sub>2</sub> via a superoxide radical pathway. The optimal reaction conditions were: temperature 30 °C, time 30 min, pH 5.5, TMB concentration 0.2 mM, and H₂O₂ concentration 0.2 mM. Steady-state kinetic analysis revealed that the <strong>Cu</strong>-<strong>Mo</strong>-<strong>VC</strong>-<strong>CN</strong> nanozyme had Michaelis-Menten constants (<em>K</em>ₘ) of 0.083 mM for TMB and 0.603 mM for H<sub>2</sub>O<sub>2</sub>. Under optimal conditions, the system enabled highly sensitive D-PA quantification with a linear range of 0.5–100 μM and a detection limit of 0.45 μM. The nanozyme was successfully applied to determine D-PA content in pharmaceutical tablets with satisfactory recovery (from 97.73 to 98.27%). Furthermore, a smartphone-based testing platform was established to provide a portable and practical solution for the real-time monitoring of D-PA. This work provides both an efficient strategy for developing multi-metal-doped nanozymes and a reliable colorimetric platform for D-PA monitoring.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113681"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798091","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}

引用次数: 0

Recent developments in modified graphitic carbon nitride-based materials for electrochemical sensing of emerging contaminants and energy storage. A review 用于新兴污染物电化学传感和储能的改性石墨氮化碳基材料的最新进展。回顾

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-26 DOI: 10.1016/j.diamond.2026.113676

Cabangani Donga , Kholiswa Yokwana , Tau S. Ntelane , Rudzani Sigwadi , Luyanda L. Noto , Pontsho S. Mbule

{"title":"Recent developments in modified graphitic carbon nitride-based materials for electrochemical sensing of emerging contaminants and energy storage. A review","authors":"Cabangani Donga , Kholiswa Yokwana , Tau S. Ntelane , Rudzani Sigwadi , Luyanda L. Noto , Pontsho S. Mbule","doi":"10.1016/j.diamond.2026.113676","DOIUrl":"10.1016/j.diamond.2026.113676","url":null,"abstract":"<div><div>Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>), a polymeric semiconductor with a graphite-like layered structure, has gained significant attention in electrochemical sensing and energy storage applications due to its large surface area, abundant active sites, metal-free nature, low cost, and simple synthesis. However, pristine g-C<sub>3</sub>N<sub>4</sub> suffers from poor electrical conductivity and significant irreversible capacity loss, which limit its practical performance. This review highlights recent advances in modification strategies aimed at improving the properties of g-C<sub>3</sub>N<sub>4</sub>-based materials for enhanced electrochemical detection of emerging pollutants and energy storage applications. Key approaches include heteroatom doping, defect engineering, heterojunction construction, and surface modification through various synthesis techniques. In addition, the review discusses current challenges and provides future perspectives for researchers exploring modified g-C<sub>3</sub>N<sub>4</sub> materials in electrochemical sensing and energy storage technologies.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113676"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798093","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}

引用次数: 0

Influence of KOH, NaOH and temperature on annoni grass ash-derived few layer and sponge-like graphene studied by Raman spectroscopy 用拉曼光谱研究了KOH、NaOH和温度对羊草灰衍生的少层和海绵状石墨烯的影响

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-27 DOI: 10.1016/j.diamond.2026.113680

Roberta Q.B. da Rosa , Juliana A.P. de Figueiredo , Maximiliano J.M. Zapata , Patricia C. Azzi , Eduarda C. Trindade , Lizandro B. Reyna Zegarra , Jacson W. de Menezes , Chiara Valsecchi , Alessandro Girardi , Luis E.G. Armas

{"title":"Influence of KOH, NaOH and temperature on annoni grass ash-derived few layer and sponge-like graphene studied by Raman spectroscopy","authors":"Roberta Q.B. da Rosa , Juliana A.P. de Figueiredo , Maximiliano J.M. Zapata , Patricia C. Azzi , Eduarda C. Trindade , Lizandro B. Reyna Zegarra , Jacson W. de Menezes , Chiara Valsecchi , Alessandro Girardi , Luis E.G. Armas","doi":"10.1016/j.diamond.2026.113680","DOIUrl":"10.1016/j.diamond.2026.113680","url":null,"abstract":"<div><div>In this work, we report the influence of the chemical reagents potassium hydroxide (KOH), sodium hydroxide (NaOH) and temperature on the structural quality of graphene derived from annoni grass ash, by Raman spectroscopy. For this purpose, the annoni grass (AG) leaves were combusted at 400 °C for 60 min to obtain the annoni grass ash (AGA). For graphene production, the AGA was activated with KOH and NaOH at 800, 850 and 950 °C for 60 min. SEM images and Raman analysis revealed that when AGA is activated with KOH, few layer graphene (FLG) is produced, whereas activation with NaOH results in sponge-like graphene with lower structural disorder. On the other hand, 850 and 950 °C are the optimal temperatures for producing both FLG and sponge-like graphene using KOH and NaOH as activating agents. Disorder analysis, using the ratio between the integrated intensities of the D = DS + DA, G = GS + GA, DA, and GA bands (I<sub>D</sub>/I<sub>G</sub>, I<sub>DA</sub>/I<sub>GA</sub>), showed that sponge-like graphene exhibits lower disorder than FLG. Additionally, the I<sub>2D</sub>/I<sub>G</sub> ratios indicate that for sponge-like graphene, the number of layers decreases as the temperature increases. These results indicate that graphene production from AG biomass, an invasive weed of the agricultural fields, represents a promising route for converting an abundant and low-value residue into value-added carbon materials through a simple and cost-effective process.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113680"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798087","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}

引用次数: 0

Improving tribological performance of carbon fiber reinforced PTFE against titanium alloy: A DLC coating and polishing approach 提高碳纤维增强聚四氟乙烯对钛合金的摩擦学性能：DLC涂层和抛光方法

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-28 DOI: 10.1016/j.diamond.2026.113684

Duoxun Fang , Cuiyang Zhao , Peng Zhuo , Linmao Qian , Yang Wang , Lei Chen

{"title":"Improving tribological performance of carbon fiber reinforced PTFE against titanium alloy: A DLC coating and polishing approach","authors":"Duoxun Fang , Cuiyang Zhao , Peng Zhuo , Linmao Qian , Yang Wang , Lei Chen","doi":"10.1016/j.diamond.2026.113684","DOIUrl":"10.1016/j.diamond.2026.113684","url":null,"abstract":"<div><div>The poor wear resistance of carbon fiber-reinforced PTFE (CF-PTFE) composites remains a key issue when sliding against hard alloys in seals. This study introduces a synergistic surface engineering strategy combining titanium alloy (TC4) polishing with diamond-like carbon (DLC) coating deposition to mitigate CF-PTFE wear under lubrications. It was found that when the surface roughness (<em>S</em><sub>q</sub>) exceeds 100 nm, DLC solid lubricants not only fail to reduce friction but also lead to more severe material loss of CF-PTFE. In contrast, at a reduced <em>S</em><sub>q</sub> of ~20 nm, DLC deposition yields a friction coefficient nearly 3-fold lower and a reduction in the wear rate of CF-PTFE by approximately 60%. This improvement stems from effective suppression of abrasive wear, which is otherwise caused by inherent asperities on rough DLC or those generated on worn TC4 surfaces. The study offers a new perspective for enhancing the durability of soft sacrificial materials against hard counterface.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113684"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798088","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}

引用次数: 0

Abnormal transfer curve drift in hydrogen-terminated diamond metal-oxide-semiconductor field-effect transistors 端氢金刚石金属氧化物半导体场效应晶体管的异常传递曲线漂移

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-21 DOI: 10.1016/j.diamond.2026.113665

Chao Zhang , Feng Yang , Yingying Sun , Xiang Li , Yongbo Su , Yinghui Zhong , Chongxin Shan

{"title":"Abnormal transfer curve drift in hydrogen-terminated diamond metal-oxide-semiconductor field-effect transistors","authors":"Chao Zhang , Feng Yang , Yingying Sun , Xiang Li , Yongbo Su , Yinghui Zhong , Chongxin Shan","doi":"10.1016/j.diamond.2026.113665","DOIUrl":"10.1016/j.diamond.2026.113665","url":null,"abstract":"<div><div>In this letter, trapping effects in hydrogen-terminated diamond (H-diamond) metal-oxide-semiconductor field-effect transistors (MOSFETs) are investigated. Abnormal transfer curve drift phenomenon is identified in transfer characteristics of the device. The defect density within gate dielectrics is quantified through the utilization of capacitance-voltage (<em>C</em><img><em>V</em>) measurements, whereas the impact of defects on dynamic current behavior is assessed via pulsed current-voltage (<em>I</em>-<em>V</em>) characterization. The transfer curve drift originates from the trapping of charge carriers in the gate dielectric layer. This work reports on the first characterization of trap time constants and spatial locations in H-diamond MOSFET, employing the transient current method. Three traps in the H-diamond MOSFET exhibit time constants of approximately 0.16 s (DP<sub>1</sub>), 1 s (DP<sub>2</sub>), and 6.7 s (DP<sub>3</sub>). Among them, DP<sub>1</sub> and DP<sub>2</sub> reside within the gate dielectric, with DP<sub>3</sub> originating from the diamond layer. This letter results may lead to better applications in H-diamond MOSFETs.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113665"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798158","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}

引用次数: 0

Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required 外部封面-期刊名称，封面图片，卷刊细节，ISSN，封面日期，爱思唯尔标志和学会标志（如果需要）

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-05-12 DOI: 10.1016/S0925-9635(26)00437-1

引用次数: 0

Enhancing the rate capability of supercapacitor via electrospinning in conjunction with solvent evaporation 静电纺丝与溶剂蒸发相结合提高超级电容器的速率性能

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-28 DOI: 10.1016/j.diamond.2026.113682

Jinyong Huang , Jingxuan Huang , Xinquan Shen , Zhong Dai

{"title":"Enhancing the rate capability of supercapacitor via electrospinning in conjunction with solvent evaporation","authors":"Jinyong Huang , Jingxuan Huang , Xinquan Shen , Zhong Dai","doi":"10.1016/j.diamond.2026.113682","DOIUrl":"10.1016/j.diamond.2026.113682","url":null,"abstract":"<div><div>Lignin is a promising low-cost, widely available precursor for supercapacitor electrodes, yet conventional preparation methods yield carbons with limited pore structures and poor ion transport, hampering rate performance. Herein, we develop a green strategy combining electrospinning and solvent evaporation, using lignin and cellulose acetate as precursors. Through synergistic multi-solvent volatilization, we fabricate all-bio-based hierarchically porous carbon nanofibers. The lignin-to-cellulose acetate ratio significantly impacts fiber morphology, pore structure, and electrochemical properties. At an optimal 8:2 ratio, the resultant material (PCF-2) possesses a micro-meso-macroporous architecture, with a specific surface area of 306 m<sup>2</sup> g<sup>-1</sup> and a pore volume of 0.1516 m<sup>3</sup> g<sup>-1</sup>. As an electrode, the ion diffusion coefficient of PCF-2 has increased by four times compared to the unmodified electrodes. Hence, the PCF-2 delivers a specific capacitance of 288 F g<sup>−1</sup> at 0.5 A g<sup>−1</sup> and retaining over 84% capacitance at 5 A g<sup>−1</sup>, demonstrating excellent rate capability. A symmetric PCF-2//PCF-2 supercapacitor achieves an energy density of 27.54 Wh kg<sup>−1</sup> at 400 W kg<sup>−1</sup> and maintains 91.8% capacitance after 10,000 cycles. This work offers a novel approach for high-performance, high-rate lignin-based supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113682"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798085","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}

引用次数: 0

Pr6O11-doped graphitic carbon nitride composites for photodegradation of methylene blue and photoreduction of chromium (VI): Synthesis, characterization, performance, and mechanism 用于光降解亚甲基蓝和光还原铬的掺杂石墨氮化碳复合材料（VI）：合成、表征、性能和机理

IF 5.1 3区材料科学

Diamond and Related Materials Pub Date : 2026-05-01 Epub Date: 2026-04-13 DOI: 10.1016/j.diamond.2026.113624

Tran Nguyen Cam Nhung , Dang Thanh Cong Minh , Tran Dang Khoa , Nguyen Huu Hieu

{"title":"Pr6O11-doped graphitic carbon nitride composites for photodegradation of methylene blue and photoreduction of chromium (VI): Synthesis, characterization, performance, and mechanism","authors":"Tran Nguyen Cam Nhung , Dang Thanh Cong Minh , Tran Dang Khoa , Nguyen Huu Hieu","doi":"10.1016/j.diamond.2026.113624","DOIUrl":"10.1016/j.diamond.2026.113624","url":null,"abstract":"<div><div>In this study, Pr<sub>6</sub>O<sub>11</sub>/g-C<sub>3</sub>N<sub>4</sub> (PrCN) composites were successfully synthesized via calcination and ultrasonication. A comprehensive set of characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), UV–Vis spectroscopy, photoluminescence (PL) spectra, X-ray photoelectron spectroscopic analysis (XPS), and Fourier transform infrared spectroscopy (FTIR) were employed to investigate the structural, morphological, and optical properties of the composites. The band gap values were significantly reduced, measured at 2.40, 2.15, and 2.08 eV for 5PrCN, 10PrCN, and 15PrCN, respectively. The photocatalytic performance was assessed by the degradation of methylene blue (MB) dye, achieving a removal efficiency of up to 95%, and Cr(VI) reduction with an efficiency exceeding 92%, within a short illumination period of 180 min. The synthesized 10PrCN composite exhibits excellent stability, maintaining high photocatalytic performance over four consecutive cycles for MB degradation and Cr(VI) reduction. The hydroxyl groups adsorbed on the surface are oxidized by photo-generated holes to produce <img>OH radicals, while photo-generated electrons can be captured by adsorbed O<sub>2</sub>, leading to the formation of <img>O<sub>2</sub><sup>−</sup> radicals. Both <img>OH and <img>O<sub>2</sub><sup>−</sup> radicals play essential roles in the photocatalytic degradation of MB and the reduction of Cr(VI). This research provides valuable insights into highly reactive photocatalytic composites, contributing to the global body of knowledge and promoting the sustainable development of photocatalytic materials for addressing environmental challenges.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"165 ","pages":"Article 113624"},"PeriodicalIF":5.1,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798161","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}

引用次数: 0