Diamond and Related Materials最新文献_第2页

DLC based substrate enabling single molecule detection by Surface Enhanced Raman Spectroscopy (SERS) 利用表面增强拉曼光谱 (SERS) 实现单分子检测的 DLC 基底

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111775

Cristiane Costa Washek , Luz Stefany Murcia-Correa , Luis Francisco Bonetti , Evaldo José Corat , Vladimir Jesus Trava-Airoldi

{"title":"DLC based substrate enabling single molecule detection by Surface Enhanced Raman Spectroscopy (SERS)","authors":"Cristiane Costa Washek , Luz Stefany Murcia-Correa , Luis Francisco Bonetti , Evaldo José Corat , Vladimir Jesus Trava-Airoldi","doi":"10.1016/j.diamond.2024.111775","DOIUrl":"10.1016/j.diamond.2024.111775","url":null,"abstract":"<div><div>This work shows a new and surprising application of Diamond-Like Carbon as Surface Enhanced Raman Spectroscopy (SERS) substrate. It was investigated with the well-known Rhodamine 6G (R6G) as SERS test molecule and extended the detection limit to the astonishing attomolar level, which means single molecule detection. The SERS substrate started by depositing excellent quality Diamond-Like Carbon (DLC) on aluminum, followed by laser modification of the DLC in a delimited area that defines the SERS substrate. The laser action gives electrical conductivity between the scratched surface and the aluminum. Silver was electrodeposited on this delimited area. The high Enhancement Factor was around 5 × 10<sup>12</sup> at an R6G concentration of 7 × 10<sup>−18</sup> M, observed only at few (and difficult to hit upon) points since the surface density was smaller than 2 R6G molecules/mm<sup>2</sup>. At each of the larger concentrations tested (7 × 10<sup>−15</sup>, 7 × 10<sup>−12</sup>, 7 × 10<sup>−9</sup> and 7 × 10<sup>−6</sup> M), the Raman intensities were in the same order of magnitude along the whole substrate, indicating a pretty homogeneous sensitivity. The repeatability among 5 samples tested at 7 × 10<sup>−12</sup> M showed a standard deviation of only 18 %. The nano porous structure of the silver deposits, shown by Field Emission Gun Scanning Electron Microscopy (FEG-SEM) appears to be like many other studies with electroplated silver. However, the Raman spectra backgrounds show that amorphous carbon is interacting with the silver nanoparticles. A probable explanation for the superior EF is the synergistic contributions of plasmon enhancement from silver and chemical enhancement from amorphous carbon nanostructure.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111775"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657857","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

First principles study of the electronic and mechanical properties of a porous carbon 多孔碳电子和机械特性的第一原理研究

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111769

Geng-Xin Yin, Shi-Jie Lv, Xin-Xin Wang, Zhen-Long Lv

{"title":"First principles study of the electronic and mechanical properties of a porous carbon","authors":"Geng-Xin Yin, Shi-Jie Lv, Xin-Xin Wang, Zhen-Long Lv","doi":"10.1016/j.diamond.2024.111769","DOIUrl":"10.1016/j.diamond.2024.111769","url":null,"abstract":"<div><div>Carbon is a versatile element in the periodic table, which can form many allotropes with various properties in nature. In this work, the electronic and mechanical properties of a low energy porous carbon, a topological nodal line material, are studied by first principles method. Elastic and dynamical stabilities under hydrostatic pressure are investigated, which reveal that the dynamical instability occurs first. It is a material with negative linear compressibility along the <em>a</em> axis. Tension and compression strains are applied in different crystal orientations to obtain the corresponding stresses. The results indicate that the <em>c</em> axis can endure the smallest strains, the <em>a</em> axis can withstand moderate ones while the <em>b</em> axis can bear the largest ones, however, the resulted stresses have very different behaviors. Shear strains are exerted on different crystal planes to see the corresponding mechanical responses, which uncover that the (100)[010] shear pattern has the lowest critical stress than other shear patterns. The crystal structure, dynamical stability, and electron density difference under the critical strains are checked. The reasons for the different mechanical behaviors under pressure and strain are proposed. The effects of pressure and strain on its topological property are also studied.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111769"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657851","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

Heterostructure of perovskite coupled graphitic carbon nitride for enhanced photodegradation under visible light 在可见光下增强光降解的过氧化物耦合氮化石墨异质结构

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111770

Alveera Sohel , Sakshi Beniwal , Praveen K. Surolia , Sarika Singh

{"title":"Heterostructure of perovskite coupled graphitic carbon nitride for enhanced photodegradation under visible light","authors":"Alveera Sohel , Sakshi Beniwal , Praveen K. Surolia , Sarika Singh","doi":"10.1016/j.diamond.2024.111770","DOIUrl":"10.1016/j.diamond.2024.111770","url":null,"abstract":"<div><div>This study aimed to prepare and characterize LaFeO<sub>3</sub> nanoparticles loaded graphitic carbon nitride (LFO/g-C<sub>3</sub>N<sub>4</sub>) photocatalyst and investigate the degradation of organic pollutants under UV and natural sunlight exposure. It is observed that LFO nanoparticles of an average size of about 67 nm were distributed on g-C<sub>3</sub>N<sub>4</sub> sheets through chemical bonding owing to the formation of a composite. Compared to LFO and g-C<sub>3</sub>N<sub>4,</sub> composite has a good absorption ability to harvest more UV and visible light due to its large surface area and pore size. The photocatalytic studies revealed that the g-C<sub>3</sub>N<sub>4</sub>/LFO composite exhibits higher catalytic efficiency and stability for methylene blue (MB) degradation under UV and visible light. Under UV light irradiation, the degradation efficiency of LFO, g-C<sub>3</sub>N<sub>4,</sub> and g-C<sub>3</sub>N<sub>4</sub>/LFO composite in synthetic wastewater was found to be around 50, 80 and 93 % with corresponding rate constants 0.05, 0.02, and 0.1 min<sup>−1</sup> in 30 min, respectively. Under natural sunlight, the composite degraded 97 % of MB in 180 min with a rate constant of 0.016 min<sup><img>1</sup>. The higher photocatalytic activity of the composite was attributed to the interfacial charge transfer between LaFeO<sub>3</sub> and g-C<sub>3</sub>N<sub>4,</sub> which are responsible for effective charge separation in the composite. Further, it has been investigated that singlet oxygen species (<sup>1</sup>O<sub>2</sub>) and hydroxyl radicals (<sup>•</sup>OH) are the main reactive species that contributed considerably to the complete degradation of MB. The nanocomposite was also demonstrated to be a stable catalyst and can be reused without any further modification.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111770"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657859","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

Honeycomb-like N, S dual-doped porous carbons derived from pomelo peel by effective exogenous doping strategy for supercapacitor electrodes 通过有效的外源掺杂策略从柚子皮中提取蜂窝状 N、S 双掺杂多孔碳，用于超级电容器电极

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111768

Hao Xu , Shan Zhong , Chuan Yuan , Xiaojun Zheng , Shuang Wang

{"title":"Honeycomb-like N, S dual-doped porous carbons derived from pomelo peel by effective exogenous doping strategy for supercapacitor electrodes","authors":"Hao Xu , Shan Zhong , Chuan Yuan , Xiaojun Zheng , Shuang Wang","doi":"10.1016/j.diamond.2024.111768","DOIUrl":"10.1016/j.diamond.2024.111768","url":null,"abstract":"<div><div>Biomass has emerged as a pivotal precursor to synthesize supercapacitor electrode materials owing to its low-cost and plentiful resources. The optimization of heteroatoms and porous structures is believed to be a viable method to enhance the electrochemical properties of biomass-generated carbons. Herein, pomelo peel as a precursor using KOH as an activator and heteroatom dopants (urea and sodium sulfide) was successfully converted into N, S dual-doped porous carbons under the high temperature. The effective exogenous doping strategy realizes a high abundance of N/S heteroatoms, and KOH chemical activation promotes the development of nanopores and interconnected porosities. The resultant carbon CNS-800 with a high specific surface area of 1823.8 m<sup>2</sup> g<sup>−1</sup> and rich heteroatoms of N (2.51 wt%) and S (1.36 wt%) anticipately exhibits the outstanding electrochemical properties, including the excellent specific capacitance of 329.2 F g<sup>−1</sup> at 1 A g<sup>−1</sup> in a three-electrode (3E) system and the superb capacitance retention rate of 74.12 %. The fabricated CNS-800-based symmetric two-electrode (2E) supercapacitor demonstrates a good capacitance of 243.7 F g<sup>−1</sup> and excellent cycling stability, as well as a superb energy density of 14.3 Wh kg<sup>−1</sup>. This work provides a compelling and cost-effective approach to transform biomass waste like pomelo peels into high-performance electrodes for supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111768"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663105","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

Effects of argon plasma treatment on carbon fiber surface characteric and its reinforcing polyimide composites interfacial properties at room and elevated temperatures 氩等离子处理对室温和高温下碳纤维表面特性及其增强聚酰亚胺复合材料界面性能的影响

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-10 DOI: 10.1016/j.diamond.2024.111765

Jing Wang, Zhengyin Yu, Shuang Yang, Zuhao Wang, Rong Ren, Xuhai Xiong

{"title":"Effects of argon plasma treatment on carbon fiber surface characteric and its reinforcing polyimide composites interfacial properties at room and elevated temperatures","authors":"Jing Wang, Zhengyin Yu, Shuang Yang, Zuhao Wang, Rong Ren, Xuhai Xiong","doi":"10.1016/j.diamond.2024.111765","DOIUrl":"10.1016/j.diamond.2024.111765","url":null,"abstract":"<div><div>In high temperature conditions, this can cause considerable changes in the mechanical properties of the composite. In order to determine the structural and mechanical property changes that occur in composite materials at elevated temperatures, to elucidate the damage mechanisms at elevated temperatures, and to improve the stability and durability of the materials. This paper studies how plasma treatment time affects the surface polarity, roughness, wettability and mechanical properties of carbon fibers. The results showed that the best wettability was attained after 10 min of plasma treatment, and new oxygen-containing functional groups (COO- and -C=O) developed on the fiber surface. The fundamental explanation is that during plasma surface treatment, the C<img>H group in the bisphenol A part chain segment present in the epoxy resin sizing agent's composition is oxidized, forming an organic oxide layer. In this paper, the plasma modification technology was utilized to improve the interfacial compatibility of carbon fiber and Polyimide (PI) resin, and the interlaminar shear strength reached 103.98 MPa, up 10.49 %, and the strength retention rate was 84.3 % at 300 °C. In this paper, the plasma modification technique was employed to increase the interfacial compatibility of carbon fiber and PI resin. It was found that the Inductively Coupled Plasma (ICP) treated carbon fiber surfaces underwent physical and chemical changes that effectively enhanced the interfacial compatibility with the resin. However, the chemical groups and physically etched regions on the surface of the plasma-modified fibers are able to impede the relative motion of the resin to a certain extent, thus improving the interfacial strength.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111765"},"PeriodicalIF":4.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658251","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

Improve wear resistance of C/C composites as artificial bone using diamond-like carbon coatings 利用类金刚石碳涂层提高 C/C 复合材料作为人工骨的耐磨性

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111761

Xiang Zhang, Ling Wang, Jiahao Liang, Zhixia Cai, Chengfeng Wu, Zhoujian Tan, Jiqiao Liao

{"title":"Improve wear resistance of C/C composites as artificial bone using diamond-like carbon coatings","authors":"Xiang Zhang, Ling Wang, Jiahao Liang, Zhixia Cai, Chengfeng Wu, Zhoujian Tan, Jiqiao Liao","doi":"10.1016/j.diamond.2024.111761","DOIUrl":"10.1016/j.diamond.2024.111761","url":null,"abstract":"<div><div>In this study, diamond-like carbon (DLC) coatings and silicon-doped diamond-like (Si-DLC) coatings were prepared on the surface of C/C composites by a combination of plasma-enhanced chemical vapor deposition (PECVD) and magnetron sputtering processes. The film composition, microstructure and atomic bond structure were characterized using X-ray photoelectron spectroscopy, field-emission scanning electron microscopy and Raman spectroscopy. The mechanical properties and friction behavior related to the Si element were investigated using nanoindentation and HT-1000 high temperature friction and wear tester. The biocompatibility of the materials was also evaluated by the MG-63 proliferation test. The results indicate that Si elements were successfully incorporated into the DLC films, bonding with C and O atoms, which altered the thermal stability and microstructure of the coatings, reduced the internal stress of the films, and increased disorder. Compared to C/C composites, all coated layers exhibited lower coefficients of friction, with the formation of transfer layers and graphitization induced by friction contributing to the excellent tribological performance. Both coatings showed no cytotoxicity and demonstrated good biocompatibility. Both coatings are effective in reducing wear and chip losses in C/C composites when used as artificial bones. This work suggests that diamond-like carbon coated C/C composites can be excellent structural materials for human body in biomedical science.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111761"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662993","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

Two types of stimulated emission in HPHT diamond with a high concentration of NV centers 具有高浓度 NV 中心的 HPHT 金刚石中的两种受激发射类型

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111763

V.F. Lebedev , E.A. Vasilev , I.V. Klepikov , T.S. Misnikova , Ya.A. Ryvkina , A.V. Koliadin , V.G. Vins

{"title":"Two types of stimulated emission in HPHT diamond with a high concentration of NV centers","authors":"V.F. Lebedev , E.A. Vasilev , I.V. Klepikov , T.S. Misnikova , Ya.A. Ryvkina , A.V. Koliadin , V.G. Vins","doi":"10.1016/j.diamond.2024.111763","DOIUrl":"10.1016/j.diamond.2024.111763","url":null,"abstract":"<div><div>The paper presents the results of experimental observation of two types of stimulated emission (SE) under pulsed laser pumping at 532 nm in diamond with NV centers. A comprehensive spectroscopic characterization of multisectorial HPHT diamond plate was performed. At low pumping power, the stimulated emission from NV¯ centers was recorded as a broad (≥80 nm wide) band with a maximum at 706 nm in the {111} and {311} sectors of the diamond plate. As the pump power increased in the {111} sector, narrow-band stimulated emission (<10 nm wide) was detected, with a maximum at 716 nm and a luminescence impulse duration of 1.5–3 ns. As the pump density increased, a fine structure in the spectrum of narrow-band stimulated emission was revealed for the first time. The concentration of NV¯ centers in the {111} and {311} growth sectors was ≈10 ppm. However, there were considerable differences in the concentrations of C (35 and 3.5 ppm) and C<sup>+</sup> centers (6.1 and 3.2 ppm, respectively). It was demonstrated that the presence of a high concentration of NV¯ centers is not the only necessary condition for the initiation of narrow-band SE in the 710–720 nm range. In the {311} sector, lighting at 360, 405, and 488 nm reduced the concentration of NV¯ centers by 15 % while increasing the concentration of C<sup>+</sup> centers in the {311} sector. This effect is weak in the {111} sector. The authors suggested a model for narrow-band SE at the transition Valence Band → C<sup>+</sup> with charge-state conversion of C↔C<sup>+</sup> and NV<sup>0</sup>↔NV¯ centers. Further research on the dynamic processes is required in order to a detailed understanding of the operation of NV centers in diamond during SE generation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111763"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663044","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

Hydrothermal synthesis of rGO-decorated NiMn2O4 nanoneedles for high-performance positive electrode in asymmetric supercapacitors 用于不对称超级电容器中高性能正极的 rGO 装饰镍锰氧化物纳米针的水热合成

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111764

J. Jothi , M. Parthibavarman , K.L. Meghanathan , Basma Souayeh , Mir Waqas Alam , Shima Sadaf

{"title":"Hydrothermal synthesis of rGO-decorated NiMn2O4 nanoneedles for high-performance positive electrode in asymmetric supercapacitors","authors":"J. Jothi , M. Parthibavarman , K.L. Meghanathan , Basma Souayeh , Mir Waqas Alam , Shima Sadaf","doi":"10.1016/j.diamond.2024.111764","DOIUrl":"10.1016/j.diamond.2024.111764","url":null,"abstract":"<div><div>Pseudocapacitive electrode materials inherently have low electron conductivity, which prevents an energetic material from being fully utilised. We were able to produce effective hierarchical NiMn<sub>2</sub>O<sub>4</sub>/rGO composites, which provide an appealing solution to this issue. The composites were synthesised using a one-step hydrothermal approach. Due to the high electrical conductivity of reduced graphene oxide (rGO), the needles on plate like morphology of NiMn<sub>2</sub>O<sub>4</sub>, and the strong hold of dynamic materials to the current collector, the resulting hybrid electrodes exhibit a specific capacitance of 1628 Fg<sup>−1</sup> at a current density of 1 Ag<sup>−1</sup>. They also demonstrate excellent rate performance and remarkable cycling stability, with a capacitance retention of 97.4 % after 10,000 cycles. In addition, the NiMn<sub>2</sub>O<sub>4</sub>/rGO//AC asymmetric supercapacitor (ASC) exhibits a peak energy density of 45Whkg<sup>−1</sup> when operated at a power density of 3240 Wkg<sup>−1</sup>. The ASC device has an impressive ultralong cycling life, with a capacitance retention rate of 89.1 % after undergoing 10,000 charge/discharge cycles. The NiMn<sub>2</sub>O<sub>4</sub>/rGO composites provide a scalable production method and demonstrate outstanding electrochemical performance. This presents an opportunity to create innovative hybrid electrodes for enhanced supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111764"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663106","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

Diamond parameter design and assessment of a novel 3D printed diamond grinding wheel with linear cooling channels 带有线性冷却通道的新型 3D 打印金刚石砂轮的金刚石参数设计与评估

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111760

Jingjing Wu , Qian Zhang , Yinfeng Li , Shaohe Zhang , Xiangwang Kong , Linglong Rong , Yutong Xiao , Hongzhi Li , Zhuofan Ding

{"title":"Diamond parameter design and assessment of a novel 3D printed diamond grinding wheel with linear cooling channels","authors":"Jingjing Wu , Qian Zhang , Yinfeng Li , Shaohe Zhang , Xiangwang Kong , Linglong Rong , Yutong Xiao , Hongzhi Li , Zhuofan Ding","doi":"10.1016/j.diamond.2024.111760","DOIUrl":"10.1016/j.diamond.2024.111760","url":null,"abstract":"<div><div>To solve the problems of a metal-bonded diamond grinding wheel in grinding hard and brittle material parts, such as easy blockage, poor cooling capacity, and insufficient self-sharpening, a 3D printed diamond grinding wheel with linear cooling channels (GWLCC) was proposed, and its basic parameters were analyzed in this paper. The new grinding wheels with different diamond parameters were prepared by using dual-filament 3D printing technology. The hardness and relative density of the grinding wheels were measured, and the grinding tests of red sandstone were carried out. The experimental results show that high volume concentration and fine granularity of diamond particles are more likely to cause agglomeration behavior, resulting in more pores and cracks, thus reducing the relative density of the grinding wheel and matrix strength, but this is conducive to the exposure of diamond particles. The grinding efficiency of the diamond grinding wheel is positively correlated with the volume concentration and grain size of the diamond. Besides, a test of the grinding performance of GWLCC with different diamond parameters in grinding different brittle-hard materials was carried out, and the suitability of the new 3D printed grinding wheel and its potential to improve grinding performance has been proven. The GWLCC suitable for different hard and brittle materials are summarized.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111760"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663094","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

High-performance flexible CoFe2O4/N-doped carbon nanofiber composite anode materials for sodium-ion batteries 用于钠离子电池的高性能柔性 CoFe2O4/N 掺杂碳纳米纤维复合负极材料

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-08 DOI: 10.1016/j.diamond.2024.111730

Yan Ren , Qi Li , Qi Liu , Wenquan Jiang , Hengrui Qiu , Yongqiang Zhang , Wenxiu He

{"title":"High-performance flexible CoFe2O4/N-doped carbon nanofiber composite anode materials for sodium-ion batteries","authors":"Yan Ren , Qi Li , Qi Liu , Wenquan Jiang , Hengrui Qiu , Yongqiang Zhang , Wenxiu He","doi":"10.1016/j.diamond.2024.111730","DOIUrl":"10.1016/j.diamond.2024.111730","url":null,"abstract":"<div><div>Graphite is traditionally used as an anode material but is unsuitable for use in sodium-ion batteries because it has a low specific capacity and poor safety characteristics, it is therefore necessary to develop alternative anode materials. Flexible CoFe<sub>2</sub>O<sub>4</sub> nanoparticle/N-doped carbon nanofiber films were prepared by electrospinning and calcination. The advantages of this process included inexpensive starting materials, easy preparation, and suitability for commercialization. The inherent shortcomings of CoFe<sub>2</sub>O<sub>4</sub>, such as poor electronic conductivity and large changes in volume, were mitigated via elemental doping and the formation of composites with high-quality carbon materials. Nitrogen-doped carbon nanofibers with large specific surface areas and superior mechanical properties were used as the supporting skeleton of the material. These nanofibers limited the volume expansion of CoFe<sub>2</sub>O<sub>4</sub> throughout the cycling process and increased the ion diffusion velocity in the material. The optimal integration of nanoscale CoFe<sub>2</sub>O<sub>4</sub> particles, which possess a higher theoretical specific capacity, with a nitrogen-doped carbon nanofiber conductive framework featuring a crosslinked three-dimensional structure facilitated the infiltration of the electrolyte into the electrode. This integration reduced the diffusion distance of sodium ions and effectively reduced the volume expansion of the material, as well as damage to the material during the electrochemical reaction. After 200 cycles at a current density of 0.1 A g<sup>−1</sup>, it provided a high sodium storage capacity of 365.7 mA h g<sup>−1</sup>. The capacity was maintained at 176.3 mA h g<sup>−1</sup> even at a high current density of 2 A g<sup>−1</sup>. Exhibits good cycle stability.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111730"},"PeriodicalIF":4.3,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658250","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