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Probing the formation mechanisms of reactive oxygen species in graphene oxide-catalyzed ozone advanced oxidation processes
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-22 DOI: 10.1016/j.carbon.2024.119831
Huipeng Wang , Zhijun Xu , Xiaoning Yang
{"title":"Probing the formation mechanisms of reactive oxygen species in graphene oxide-catalyzed ozone advanced oxidation processes","authors":"Huipeng Wang ,&nbsp;Zhijun Xu ,&nbsp;Xiaoning Yang","doi":"10.1016/j.carbon.2024.119831","DOIUrl":"10.1016/j.carbon.2024.119831","url":null,"abstract":"<div><div>Graphene oxide (GO), a representative carbon-based catalyst, has demonstrated promising prospects for oxidation removal of organic pollutants in ozone (O<sub>3</sub>)-based advanced oxidation processes (AOPs). However, due to complex reactions of realistic ozonation processes, the functional mechanisms of oxygen-containing functional groups of GOs remain ambiguous, which are generally difficult to identify by single experimental characterization. Herein, we applied density functional theory (DFT) to investigate the physical interactions and chemical reaction mechanisms between O<sub>3</sub> and oxygen-containing functional groups of GO in aqueous media. It is demonstrated that the functional groups on GOs could promote the generation of various reactive oxygen species (ROS) through different ozonation mechanisms, which include direct activation and indirect H-abstraction. The connection between types of functional groups and the generated ROS has been established. Further reactive molecular dynamics simulations were used to dynamically capture the catalytic ozonation events for the functional groups of GOs. The simulated type changes of functional groups and time evolution of the ROS-related species number show consistent behavior with the above DFT computations. The proposed mechanisms provide an improved understanding of ozonation catalysis, which is expected to advance the development of AOP technologies utilizing GO catalysis.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119831"},"PeriodicalIF":10.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Hierarchical aggregation structure regulation and electromagnetic loss mechanism of cross-linked polyaniline in polymer wave absorbers 聚合物吸波材料中交联聚苯胺的分层聚集结构调控与电磁损耗机理
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-22 DOI: 10.1016/j.carbon.2024.119848
Zhipeng Niu , Yue Wang , Qingfeng Tian , Jun Wang , Zhenguo Gao , Di Lan , Guanglei Wu
{"title":"Hierarchical aggregation structure regulation and electromagnetic loss mechanism of cross-linked polyaniline in polymer wave absorbers","authors":"Zhipeng Niu ,&nbsp;Yue Wang ,&nbsp;Qingfeng Tian ,&nbsp;Jun Wang ,&nbsp;Zhenguo Gao ,&nbsp;Di Lan ,&nbsp;Guanglei Wu","doi":"10.1016/j.carbon.2024.119848","DOIUrl":"10.1016/j.carbon.2024.119848","url":null,"abstract":"<div><div>Frequency-specific electromagnetic wave absorbent materials are a key solution to the problem of multi-band electromagnetic pollution. Traditional absorbent materials often exhibit abrupt changes in electrical parameters due to factors such as threshold over-permeation. Few studies have established a strong correlation between the microscopic structure of these materials and their effective absorption frequency (EAF) ranges, making precise linear control difficult. Therefore, it is essential to explore new absorbent materials with adjustable structures closely linked to their electrical parameters. In this work, we focused on easily modifiable conductive polymer composites, producing a series of polymer-magnetic oxide absorbing materials with crosslinking degrees and magnetic properties that can be linearly adjusted. By optimizing their microstructure, we enhanced their impedance matching capabilities. Ultimately, we developed an efficient absorbent material with tunable absorption effects, specifically, the P-1.0Co<sub>3</sub>O<sub>4</sub> sample achieved an effective absorption bandwidth of 6.64 GHz at a thickness of only 1.3 mm, with tunable EAF ranging from 10.9 GHz to 18.0 GHz. While full-band adjustability was not realized, this work provides significant theoretical guidance and engineering application value for developing band-specific absorbent materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119848"},"PeriodicalIF":10.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Optimizing field-emission devices: Advancements in stability and performance with well-oriented and dense integrated carbon nanotube assemblies
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-21 DOI: 10.1016/j.carbon.2024.119845
Jaewon Lee , Young Bae Kim , Young Shik Cho , Jiwon Choi , Ki Hyun Lee , Tae Hee Han , Hongsoo Choi , Se Hoon Gihm , Yeonsu Jung , Taehoon Kim , Keunsoo Jeong , Chong Rae Park
{"title":"Optimizing field-emission devices: Advancements in stability and performance with well-oriented and dense integrated carbon nanotube assemblies","authors":"Jaewon Lee ,&nbsp;Young Bae Kim ,&nbsp;Young Shik Cho ,&nbsp;Jiwon Choi ,&nbsp;Ki Hyun Lee ,&nbsp;Tae Hee Han ,&nbsp;Hongsoo Choi ,&nbsp;Se Hoon Gihm ,&nbsp;Yeonsu Jung ,&nbsp;Taehoon Kim ,&nbsp;Keunsoo Jeong ,&nbsp;Chong Rae Park","doi":"10.1016/j.carbon.2024.119845","DOIUrl":"10.1016/j.carbon.2024.119845","url":null,"abstract":"<div><div>Carbon nanotubes (CNTs) are attracting widespread interest as electron emitters due to their superior field emission properties. However, the correlation between the microstructural properties of CNTs and their electron emission performance has not been fully understood, limiting the optimization of their performance particularly in terms of device stability. Herein, we present highly oriented and densely integrated CNT assemblies as a cold cathode material with stable field electron emission. These assemblies were prepared via the floating catalyst chemical vapor deposition-based direct spinning method, constructing a fibrous structure with a hierarchical composition of individual CNTs and bundles within the microstructure. By varying the spinning rate during the winding process, we engineered the microstructure of the CNT assemblies. The CNT assemblies spun at high rates presented a relatively higher degree of orientation and packing density for both individual CNTs and bundles, thus resulting in a thermally and mechanically stable microstructure. Furthermore, the stable microstructure of these CNT assemblies translated into an almost consistent electric field under repeated electron emission cycles, well-revealing their impressive stability in field electron emission. Overall, the CNT assemblies with a stable microstructure enable efficient and stable field electron emission, offering a promising strategy for devising CNT-based field electron-emitting devices.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119845"},"PeriodicalIF":10.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
One-dimensional C60 arrays in noncovalent benzidine networks
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-21 DOI: 10.1016/j.carbon.2024.119838
Takatsugu Wakahara , Chika Hirata , Dorra Mahdaoui , Kazuko Fujii , Yoshitaka Matsushita , Osamu Ito , Makito Takagi , Tomomi Shimazaki , Masanori Tachikawa , Shinjiro Yagyu , Yubin Liu , Yoshiyuki Nakajima , Takuro Nagai , Kazuhito Tsukagoshi
{"title":"One-dimensional C60 arrays in noncovalent benzidine networks","authors":"Takatsugu Wakahara ,&nbsp;Chika Hirata ,&nbsp;Dorra Mahdaoui ,&nbsp;Kazuko Fujii ,&nbsp;Yoshitaka Matsushita ,&nbsp;Osamu Ito ,&nbsp;Makito Takagi ,&nbsp;Tomomi Shimazaki ,&nbsp;Masanori Tachikawa ,&nbsp;Shinjiro Yagyu ,&nbsp;Yubin Liu ,&nbsp;Yoshiyuki Nakajima ,&nbsp;Takuro Nagai ,&nbsp;Kazuhito Tsukagoshi","doi":"10.1016/j.carbon.2024.119838","DOIUrl":"10.1016/j.carbon.2024.119838","url":null,"abstract":"<div><div>Face-centered cubic packing is typically observed for pristine C<sub>60</sub> in the solid state, and one-dimensional alignment structures of pristine C<sub>60</sub> in the solid state are extremely rare. This study presents the synthesis of novel one-dimensional aligned C<sub>60</sub> in single-cocrystal nanosheets, formed from C<sub>60</sub> and N,N,N′,N′-tetraphenylbenzidine (TPB). In C<sub>60</sub>/TPB, which exhibits ambipolar charge transport characteristics, TPB serves as a molecular receptor to facilitate the formation of noncovalent networks wherein C<sub>60</sub> organizes into one-dimensional arrays. The resulting C<sub>60</sub>/TPB nanosheets give rise to a distinct absorption band in the near-infrared region, suggesting the occurrence of charge-transfer interactions between the C<sub>60</sub> and TPB frameworks within the cocrystals.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119838"},"PeriodicalIF":10.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Carbon black densified matrix graphite to enhance its anti-infiltration capability against molten salt 碳黑致密基质石墨,增强其抗熔盐渗透能力
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-20 DOI: 10.1016/j.carbon.2024.119844
Haoran Wang , Lihua Guo , Yajuan Zhong , Jun Lin , Jian Zhang , Xiaojian Mao , Shiwei Wang
{"title":"Carbon black densified matrix graphite to enhance its anti-infiltration capability against molten salt","authors":"Haoran Wang ,&nbsp;Lihua Guo ,&nbsp;Yajuan Zhong ,&nbsp;Jun Lin ,&nbsp;Jian Zhang ,&nbsp;Xiaojian Mao ,&nbsp;Shiwei Wang","doi":"10.1016/j.carbon.2024.119844","DOIUrl":"10.1016/j.carbon.2024.119844","url":null,"abstract":"<div><div>A novel graphite matrix was prepared by adding carbon black (CB) as a densification agent to traditional matrix A3-3 graphite preparation. The particle size of CB densifier we chose was approximately 50–150 nm, which was smaller than the pore diameter of densified matrix graphite (500-1000 nm). Five different mass fractions of CB were mixed and compared with as-received A3-3 by various characterization methods, which indicated that CB can effectively fill the pores of A3-3 and improve its anti-infiltration capability against molten salt (fluoride salt for molten salt reactor and heat storage salt). Meanwhile, considering the requirements for A3-3 graphite in scenarios of solid fuel molten salt reactor and thermal energy storage system, all the samples were compared as well before and after purification. The results showed that purification treatment resulted in slight increase of the pore size and open porosity of graphite and thus weakened its anti-infiltration capability against molten salt, but the thermal properties of graphite improved inversely. However, the addition of excessive CB could cause the significantly decline of thermal properties of A3-3. Comprehensively considering the anti-infiltration effect and requirements of thermal properties, adding 5 % CB was the most preferrable choice for the matrix graphite before and after purification.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119844"},"PeriodicalIF":10.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Three-dimensional in-situ observation and cohesive zone modeling of tension-induced delamination of two-dimensional C/SiC composites via deep learning-based damage identification 通过基于深度学习的损伤识别,对二维 C/SiC 复合材料的张力诱导分层进行三维原位观测和内聚区建模
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-20 DOI: 10.1016/j.carbon.2024.119842
Fengwen Kang , Hong Mei , Xiangyun Gao , Daxu Zhang , Fang Ye , Yi Zhang , Laifei Cheng
{"title":"Three-dimensional in-situ observation and cohesive zone modeling of tension-induced delamination of two-dimensional C/SiC composites via deep learning-based damage identification","authors":"Fengwen Kang ,&nbsp;Hong Mei ,&nbsp;Xiangyun Gao ,&nbsp;Daxu Zhang ,&nbsp;Fang Ye ,&nbsp;Yi Zhang ,&nbsp;Laifei Cheng","doi":"10.1016/j.carbon.2024.119842","DOIUrl":"10.1016/j.carbon.2024.119842","url":null,"abstract":"<div><div>The initial defects in two-dimensional (2D) carbon fiber-reinforced silicon carbide matrix (C/SiC) composites directly influence their mechanical properties. Structural discrepancies between the layers resulting from the layer stacking relationship can lead to delamination and cracking in 2D C/SiC composites. In this study, <em>in-situ</em> scanning electron microscopy and <em>in-situ</em> computed tomography (CT) tensile tests were performed to investigate the interlayer adhesion and load transfer and their influence on the tensile behavior of 2D C/SiC composites. Deep learning-based image segmentation approach was used for quantitative analysis of damage, and the delamination mechanism was expounded. The results revealed that the cracks on the surface coating exhibited periodic cracking, and the interfacial sliding stress between the coating and the laminated preform C/SiC composite was 1.88 MPa. Combined results of <em>in-situ</em> CT tensile testing and deep learning, revealed the existence of at least two interlayer bonding states within the 2D C/SiC composite in a random phase state. One of them featured more interlayer pores and stronger adhesion, while the other exhibited smaller pores and weaker adhesion. During the tensile process, the tunnel crack underwent deflection and formed delamination cracks due to uneven interlayer bonding strength. The delamination cracks propagated until they merged with the main crack, eventually leading to the material fracture. Finally, based on the damage analysis of 2D C/SiC composite by <em>in-situ</em> CT, a simulation method for the cohesive fracture between layers was proposed, which indicated that weak interlayer bonding would trigger the tensile delamination phenomenon.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119842"},"PeriodicalIF":10.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
A 3D anisotropic multifunctional composite organohydrogel for advanced fire protection and monitoring 用于高级防火和监控的三维各向异性多功能复合有机水凝胶
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-20 DOI: 10.1016/j.carbon.2024.119846
Chenxing Xiang , Yuanhao Tian , Huiming Ning , Ning Hu , Libin Zhao , Feng Liu , Shu Wang , Rui Zou , Jie Wen
{"title":"A 3D anisotropic multifunctional composite organohydrogel for advanced fire protection and monitoring","authors":"Chenxing Xiang ,&nbsp;Yuanhao Tian ,&nbsp;Huiming Ning ,&nbsp;Ning Hu ,&nbsp;Libin Zhao ,&nbsp;Feng Liu ,&nbsp;Shu Wang ,&nbsp;Rui Zou ,&nbsp;Jie Wen","doi":"10.1016/j.carbon.2024.119846","DOIUrl":"10.1016/j.carbon.2024.119846","url":null,"abstract":"<div><div>Fires pose significant risks, leading to loss of life, property, and cultural heritage. Conventional fire protection materials encounter challenges in efficiency and intelligent monitoring, compounded by secondary hazards such as falls and impacts. Hence, there's increasing demand for innovative protective materials that combine robust mechanics, fire suppression, and advanced detection. In this study, we explore the use of reduced graphene oxide (rGO)-modified 3D spacer fabrics as a reinforcing phase within a polyvinyl alcohol (PVA)/glycerol organohydrogel (OHG) matrix, forming a novel 3D fabric-reinforced anisotropic composite OHG. This multifunctional composite OHG exhibits outstanding mechanical strength, environmental stability, enhanced flame retardancy, and smart sensing properties. The integration of fabric reinforcement significantly improves the OHG's compressive and impact resistance. The composite OHG's anisotropic structure, in conjunction with the OHG matrix, greatly enhances flame retardancy, while its dual electronic and ionic conductivities improve overall electrical performance. This synergy enables real-time compression monitoring with high sensitivity and stability, facilitated by a Bluetooth module for wireless impact event recording. Furthermore, the composite OHG's anisotropic thermal conductivity enables a thermoelectric effect, leading to self-powered fire alarm systems. This pioneering approach introduces multifunctional smart OHG composite with synergistic capabilities, offering novel prospects for advanced protection and smart firefighting applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119846"},"PeriodicalIF":10.5,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Pyrrolic and pyridinic nitrogen-rich carbon microspheres derived from polydopamine as advanced anodes for sodium ion batteries 聚多巴胺衍生的吡咯和吡啶富氮碳微球作为钠离子电池的先进阳极
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-19 DOI: 10.1016/j.carbon.2024.119836
Hongwei Tao , Kerui Huang , Kai Zeng , Sha Li , Zhijun Zhao , Zhengyou He , Kangli Wang , Kai Jiang , Haitao Hu
{"title":"Pyrrolic and pyridinic nitrogen-rich carbon microspheres derived from polydopamine as advanced anodes for sodium ion batteries","authors":"Hongwei Tao ,&nbsp;Kerui Huang ,&nbsp;Kai Zeng ,&nbsp;Sha Li ,&nbsp;Zhijun Zhao ,&nbsp;Zhengyou He ,&nbsp;Kangli Wang ,&nbsp;Kai Jiang ,&nbsp;Haitao Hu","doi":"10.1016/j.carbon.2024.119836","DOIUrl":"10.1016/j.carbon.2024.119836","url":null,"abstract":"<div><div>This study presents an efficient approach for designing hard carbon electrodes through the synthesis of nitrogen-doped carbon microspheres (NCS) via an eco-friendly high-temperature pyrolysis of polydopamine. By precisely modulating the pyrolysis temperature, the nitrogen content and bonding configurations are carefully optimized. NCS treated at 1000 °C demonstrate exceptional electrochemical performance, including an initial Coulombic efficiency of 73.4 %, a reversible capacity of 386.6 mA h g<sup>−1</sup>, a rate capability of 180.1 mA h g<sup>−1</sup> at 10 A g<sup>−1</sup>, and 75.3 % capacity retention after 1500 cycles. The abundant pyrrolic-N dopants effectively expand interlayer spacing, facilitating efficient and reversible Na⁺ intercalation. Additionally, pyridinic-N and pyrrolic-N functionalities significantly increase surface defect density, promoting rapid electron and ion transport. The spherical morphology, characterized by a low surface area, further reduces irreversible Na⁺ consumption during solid electrolyte interphase (SEI) formation, thereby ensuring high initial coulombic efficiency (ICE).</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"232 ","pages":"Article 119836"},"PeriodicalIF":10.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Rapid synthesis of onion-like nitrogen-doped carbon nanospheres with microwave and study of its tribological behavior 微波快速合成掺氮洋葱状碳纳米球及其摩擦学行为研究
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-19 DOI: 10.1016/j.carbon.2024.119840
Fengqin Shang , Yang Sun , Zihan Yan , Jiayu Yao , Ruirui Yang , Yingjia Hu , Bingheng Chen , Hangyan Shen
{"title":"Rapid synthesis of onion-like nitrogen-doped carbon nanospheres with microwave and study of its tribological behavior","authors":"Fengqin Shang ,&nbsp;Yang Sun ,&nbsp;Zihan Yan ,&nbsp;Jiayu Yao ,&nbsp;Ruirui Yang ,&nbsp;Yingjia Hu ,&nbsp;Bingheng Chen ,&nbsp;Hangyan Shen","doi":"10.1016/j.carbon.2024.119840","DOIUrl":"10.1016/j.carbon.2024.119840","url":null,"abstract":"<div><div>In this study, a simple and rapid method for the preparation of Nitrogen-doped carbon nanospheres (N–CNOs) was proposed. N–CNOs were successfully prepared by microwave heating the mixture of naphthalene, melamine, and carbon fibers for 2 min, which showed a nearly spherical morphology with a multi-layer onion-like structure, and the average diameter was 197 nm. Compared with CNOs, the coefficient of friction (COF) of N–CNOs decreased from 0.36 to 0.31 and the wear rate decreased from 1.03 × 10<sup>−5</sup> to 0.83 × 10<sup>−5</sup> mm³/(N·m), which decreased by 14 % and 19 %, respectively. When the N–CNOs concentration increased from 4.0 wt% to 16.0 wt%, the COF and wear rate of N–CNOs reached the minimum (0.22 and 0.53 × 10<sup>−5</sup> mm<sup>3</sup>/(N·m)), respectively. The excellent tribological properties of N–CNOs were attributed to the increase of interlayer spacing (0.07 nm) and the atomic scale lattice mismatch, both of which weakened interlayer interactions, thereby improving lubrication performance and reducing friction. This study not only proposed a new preparation method for N–CNOs, but also revealed the lubrication mechanism at the atomic scale, providing a technical support for their application in the field of lubrication.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119840"},"PeriodicalIF":10.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 electrochemical detection for trace minocycline based on boron-doped-diamond/carbon nanowalls biosensor 基于掺硼金刚石/碳纳米墙生物传感器的痕量米诺环素高性能电化学检测技术
IF 10.5 2区 材料科学
Carbon Pub Date : 2024-11-19 DOI: 10.1016/j.carbon.2024.119835
Linfeng Wan , Yaqi Liang , Mingchao Yang , Qiuxia Zhang , Siyu Xu , Shaoheng Cheng , Nan Gao , Danhong Zhang , Yibo Ma
{"title":"High-performance electrochemical detection for trace minocycline based on boron-doped-diamond/carbon nanowalls biosensor","authors":"Linfeng Wan ,&nbsp;Yaqi Liang ,&nbsp;Mingchao Yang ,&nbsp;Qiuxia Zhang ,&nbsp;Siyu Xu ,&nbsp;Shaoheng Cheng ,&nbsp;Nan Gao ,&nbsp;Danhong Zhang ,&nbsp;Yibo Ma","doi":"10.1016/j.carbon.2024.119835","DOIUrl":"10.1016/j.carbon.2024.119835","url":null,"abstract":"<div><div>Highly sensitive electrochemical detection of trace minocycline (MCL), one of the most important antibiotics, presents a challenge due to the lack of suitable substrates and low detection efficiency. In this work, an electrochemical biosensor with an electrode consisting of boron-doped diamond (BDD) and carbon nanowalls (CNWs) (named BDD/CNWs) is designed for the detection of MCL. The electrochemical behavior of MCL at varying scan rates suggests an adsorption-controlled mechanism dominating the process on the BDD/CNWs electrode. The sensor demonstrates good linearity in the range from 0.02 to 100 μM and achieved a limit of detection as low as 9.8 nM, ascribed to the synergistic effect of the combination of BDD with CNWs, which provide a broad potential window (2.63 V), more reaction sites, and low charge transfer resistance (87 Ω) from the electrode. Examinations of trace MCL in citric acid-phosphate buffer, tap water, rat blood, as well as interference tests, reveal high sensitivity, specificity, stability, and repeatability of the BDD/CNWs electrode, which shows promise for practical applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119835"},"PeriodicalIF":10.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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