Carbon Trends最新文献_第9页

Small-angle x-ray scattering analysis of carbon fiber voids considering void length distribution 考虑空隙长度分布的碳纤维空隙小角 X 射线散射分析

Carbon Trends Pub Date : 2024-03-18 DOI: 10.1016/j.cartre.2024.100346

Daisuke Kimura , Masahiko Demura , Kenji Nagata , Toshihira Irisawa , Yoshiki Sugimoto , Wataru Takarada , Masatoshi Shioya

{"title":"Small-angle x-ray scattering analysis of carbon fiber voids considering void length distribution","authors":"Daisuke Kimura , Masahiko Demura , Kenji Nagata , Toshihira Irisawa , Yoshiki Sugimoto , Wataru Takarada , Masatoshi Shioya","doi":"10.1016/j.cartre.2024.100346","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100346","url":null,"abstract":"<div><p>The analysis method proposed by Ruland et al. is widely used to analyze the void lengths in carbon fibers, but it could not apply to mesophase pitch-based carbon fibers. We thought that the reason for the inability to analyze pitch-based carbon fibers was the length distribution of voids that Ruland neglected. We investigated an analytical method that considers the length distribution of voids in carbon fibers. The proposed new method could be applied to various carbon fibers from polyacrylonitrile and mesophase pitch. The analysis results revealed that the average length of voids in mesophase pitch-based carbon fibers is not only long but also widely distributed. On the other hand, the voids of carbon fibers tend to be longer as the crystallite length is longer in both polyacrylonitrile-based and mesophase-based carbon fibers. It suggests that the growth of void length is strongly influenced by the growth of crystallites in the plane direction.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100346"},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000270/pdfft?md5=2ed0023ba4c6ba8440beb2a449266f0a&pid=1-s2.0-S2667056924000270-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140209409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermonanomechanics of graphene oxide-M13 bacteriophage nanocomposites -towards graphene-based nanodevices 氧化石墨烯-M13噬菌体纳米复合材料的热变形力学--面向石墨烯基纳米器件

Carbon Trends Pub Date : 2024-03-17 DOI: 10.1016/j.cartre.2024.100343

Kate Stokes , Yiwei Sun , Haowei Zhang , Paolo Passaretti , Henry White , Pola Goldberg Oppeneheimer

{"title":"Thermonanomechanics of graphene oxide-M13 bacteriophage nanocomposites -towards graphene-based nanodevices","authors":"Kate Stokes , Yiwei Sun , Haowei Zhang , Paolo Passaretti , Henry White , Pola Goldberg Oppeneheimer","doi":"10.1016/j.cartre.2024.100343","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100343","url":null,"abstract":"<div><p>The self-assembly of graphene oxide (GO) and M13 bacteriophage results in the formation of micro-porous structures, known as GraPhage13 aerogels (GPA). Given the limited applications of aerogels in industry due to their nanomechanical properties, along with the previously observed temperature-dependent characteristics in graphene-based nanocomposites, a thorough exploration of the thermosensitive nanomechanical properties of GPA is essential. Herein, a comprehensive characterisation of the morphology, composition, and spectroscopic analysis of the GPA for a range of temperatures has been conducted and correlated with its nanomechanical properties. Elevated temperatures have been found to lead to gradual removal of oxygen-containing functional groups (OCFGs) from GPA, resulting in increased structural defects and reduced stiffness. Notably, unique nanomechanical behaviours of GPA have been further identified, where the thermal expansion of <em>sp<sup>3</sup></em> bonds exceeds that of a crystalline <em>sp<sup>3</sup></em> structure, while the thermal contraction of <em>sp<sup>2</sup></em> bonds in GPA is found to be between graphite and GO. This underscores the impact of GO functionalisation on the thermal expansion behaviour of GPA. The obtained insights enhance the overall comprehension of the temperature annealing impact on GPA and highlight the tunability of its nanomechanical properties, showcasing a broad potential of this novel nanocomposite across a diverse range of applications.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100343"},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000245/pdfft?md5=61c20b5d412f4a7ffc4a839c695cc48e&pid=1-s2.0-S2667056924000245-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140187718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of nitrogen-doped reduced graphene oxide reinforcement on the thermal and mechanical properties of CFRP 掺氮还原氧化石墨烯增强材料对 CFRP 热性能和机械性能的影响

Carbon Trends Pub Date : 2024-03-17 DOI: 10.1016/j.cartre.2024.100344

Tahir Soyugüzel , Hülya Kaftelen-Odabaşı , Zahit Mecitoğlu

{"title":"The impact of nitrogen-doped reduced graphene oxide reinforcement on the thermal and mechanical properties of CFRP","authors":"Tahir Soyugüzel , Hülya Kaftelen-Odabaşı , Zahit Mecitoğlu","doi":"10.1016/j.cartre.2024.100344","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100344","url":null,"abstract":"<div><p>This study used experimental methods to investigate the impact of nitrogen-doped reduced graphene oxide particles (ND-RGOP) reinforcement on thermal and mechanical properties of unidirectional carbon fiber/ epoxy composites (CFRP). In the results, storage modulus and loss modulus significantly increase with the ND-RGOP addition. Besides, glass transition temperature is enhanced with the addition of 0.4 wt% ND-RGOP. In tensile mode, when compared to the baseline (0 weight% ND-RGOP) composites, the elastic modulus in the 0° direction (E<sub>1</sub>) enhanced by 8.25 % and 11.39 % with 0.4 (0.4 weight%) and 0.8 (0.8 weight%) ND-RGOP addition, respectively. Besides, the ultimate tensile strength of the 0.4 ND-RGOP/CFRP composites significantly reduced by 16.33 % and 53.08 % in both 0° and 90° directions, respectively, as a result of the fracture mechanism changing from fiber pull out and fiber cracking to fiber breakage which was confirmed by SEM investigations. Furthermore, both the compressive modulus and the shear modulus increased with ND-RGOP reinforcement over 10 %, although the ultimate compressive strength decreases with low ND-RGOP reinforcement. In conclusion, low concentrations of ND-RGOP addition improves the thermal and mechanical properties of CFRP laminates in elastic region, although high concentrations of ND-RGOP decreases the thermal properties.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100344"},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000257/pdfft?md5=5e86c456267e51fbf1bc301a00a23f7e&pid=1-s2.0-S2667056924000257-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140187717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental research on optimizing carbon materials for filtration applications in medicine 关于优化医疗过滤应用碳材料的实验研究

Carbon Trends Pub Date : 2024-03-16 DOI: 10.1016/j.cartre.2024.100338

Assiya Nuraly , Alibek Mutushev , Aigul Tuleibayeva , Juan Maria Gonzalez-Leal

{"title":"Experimental research on optimizing carbon materials for filtration applications in medicine","authors":"Assiya Nuraly , Alibek Mutushev , Aigul Tuleibayeva , Juan Maria Gonzalez-Leal","doi":"10.1016/j.cartre.2024.100338","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100338","url":null,"abstract":"<div><p>In the present investigation, carbonized rice husk (CRH) were used as a feedstock for obtaining experimental samples of a carbon monolith. The choice of carbonized rice husk is due to environmental friendliness and availability, optimal physico-chemical and structural features. CRH was obtained by carbonization of rice husks in steam at 900–950 °C, followed by demineralization of 2–15 % nitric acid. The article is devoted to the study of carbon material for use in medicine. In this work, 9 samples of a carbon monolith with different ratios of components were obtained. The samples were obtained on the basis of CRH and plastic mass, which were used as binders. A sample with optimal characteristics was determined: sorption capacity 75.6 %, specific surface according to the multi-current BET method 360.56 m<sup>2</sup>, sorption of ethyl alcohol in biological media 50 %. Sorption capacity was determined using methylene blue dye, which simulates medium molecular weight toxicants. The specific surface area was measured on a sorbtometer using the multiprecision BET method, and the sorption of ethyl alcohol in biological media was determined on a chromatograph. It has been established that the carbon-silicon composition of the sorbent has the mildest sorption compared to the pure carbon composition. Sample No. 8 has a high specific surface area and sorption capacity, which will allow it to absorb a wide range of toxins of various origins, including biological fluids</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100338"},"PeriodicalIF":0.0,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000191/pdfft?md5=4a4d5de1cc831f1facf60f1a79c379c1&pid=1-s2.0-S2667056924000191-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140160901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of graphene oxide (GO) for the removal of lead ions in water 用于去除水中铅离子的氧化石墨烯 (GO) 的合成与表征

Carbon Trends Pub Date : 2024-03-16 DOI: 10.1016/j.cartre.2024.100339

L.S. Mokoena, J.P. Mofokeng

{"title":"Synthesis and characterization of graphene oxide (GO) for the removal of lead ions in water","authors":"L.S. Mokoena, J.P. Mofokeng","doi":"10.1016/j.cartre.2024.100339","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100339","url":null,"abstract":"<div><p>The synthesis and characterization of graphene oxide (GO) for water related applications has become an increasing area of research. GO was prepared via Hummer's method, and analysed for structure, morphology, thermal stability, and the ability to remove heavy lead ions from solution. In FTIR analyses, hydroxyl, carboxyl and ester groups were found to be on the structure of GO. XRD showed the interlayer spacing to have increased from graphite to graphene oxide, whereby the average crystallite size of GO was 16.13. Then SEM confirmed the morphology of GO to be exfoliated and wrinkled, with stacked layers. In TGA, EG degraded in a single step, while GO degraded in three distinct steps. When using AAS to analyse the Pb (II) ion intake properties of GO, it showed a maximum adsorption of 98.1% for 600 ppm lead ion solution. The Freundlich isotherm model was consistent with this adsorption, meaning that adsorption took place on a heterogenous surface, on a multilayer basis. The value of n for this isotherm was 0.1474, implying a dominant chemical adsorption. A significant contribution was done to the structure of GO, with its metal adsorption properties clearly portrayed.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100339"},"PeriodicalIF":0.0,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000208/pdfft?md5=3de1232414504818313b3642332f0619&pid=1-s2.0-S2667056924000208-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140187715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

System of metastable volume-localized electronic states in positively charged semiconductor single-wall carbon nanotubes 带正电的半导体单壁碳纳米管中的可蜕变体积定位电子态系统

Carbon Trends Pub Date : 2024-03-15 DOI: 10.1016/j.cartre.2024.100340

S.A. Votyakov , A.V. Osadchy , E.D. Obraztsova

{"title":"System of metastable volume-localized electronic states in positively charged semiconductor single-wall carbon nanotubes","authors":"S.A. Votyakov , A.V. Osadchy , E.D. Obraztsova","doi":"10.1016/j.cartre.2024.100340","DOIUrl":"10.1016/j.cartre.2024.100340","url":null,"abstract":"<div><p>The volume-localized electronic states (SAMOs) with a maximum of their electron wave functions located in the cavity of nanomaterials have been experimentally and theoretically demonstrated in a fullerene. The existence of SAMOs in single-wall carbon nanotubes (SWCNTs) was also predicted theoretically. In the present paper, these volume states in semiconductor SWCNTs were theoretically investigated using numerical quantum modeling based on density functional theory (DFT). It is shown that the well appears in the center of the tube, whose depth increases with increasing positive charge, since the total potential of a positively charged structure can be represented as the sum of the Coulomb potential and the potential of the atoms of the tube wall. In this context, in addition to the well-studied surface-localized states, states localized in the volume of the cylinder also occur. Using the components of the electric transition dipole moment, the lifetime of the volume states was preliminarily estimated in comparison to the lifetime of the ordinary surface states.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"15 ","pages":"Article 100340"},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266705692400021X/pdfft?md5=2aa395d8517f2e841af7717981ea12bd&pid=1-s2.0-S266705692400021X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140280860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topology of boron substitutional defects in single-walled carbon nanotubes: A first-principles study 单壁碳纳米管中硼替代缺陷的拓扑结构：第一原理研究

Carbon Trends Pub Date : 2024-03-08 DOI: 10.1016/j.cartre.2024.100337

Wutthisak Prachamon , Oruethai Jaiboon , Sittipong Komin , Chesta Ruttanapun , Sukit Limpijumnong

引用次数: 0

Suppression of plasmonic interference in helicity sensitive broadband terahertz detectors 抑制螺旋敏感宽带太赫兹探测器中的等离子干扰

Carbon Trends Pub Date : 2024-03-01 DOI: 10.1016/j.cartre.2024.100331

Ilya Mazurenko , Dmitriy Vovk , Yakov Matyushkin , Alesia Paddubskaya , Maxim Rybin , Elena Obraztsova

{"title":"Suppression of plasmonic interference in helicity sensitive broadband terahertz detectors","authors":"Ilya Mazurenko , Dmitriy Vovk , Yakov Matyushkin , Alesia Paddubskaya , Maxim Rybin , Elena Obraztsova","doi":"10.1016/j.cartre.2024.100331","DOIUrl":"https://doi.org/10.1016/j.cartre.2024.100331","url":null,"abstract":"<div><p>The recently observed helicity-sensitive response, occurring in graphene based field-effect transistors (FETs) is interpreted as a result of the intrinsic phase asymmetry of these devices and interference of plasmons in the FET channel. The graphene-based plasmonic interferometers presented in this work enable the room temperature detection of THz radiation as well as allows us to distinguish between the rotation direction of circular polarized waves. To illustrate the broadband nurture of the observed effects, similar measurements were carried out at both THz and mid-infrared frequencies. The precise control of the carriers type and their concentration throughout the channel length allows us to demonstrate the helicity-sensitive response over a wide range of the gate potentials (from negative to positive values). We experimentally show that the formation of <em>p–n</em> junction inside the graphene channel leads to additional scattering of excited plasma waves, resulting in the suppression of their interference and consequent reduction of the helicity-sensitive contribution.</p></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"14 ","pages":"Article 100331"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667056924000129/pdfft?md5=2dedc3489b545f6a0608bd861ae7bc37&pid=1-s2.0-S2667056924000129-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene-containing biocarbon from burlap waste: Property comparison with commercial grade graphene nanoplatelets 从麻布废料中提取的含石墨烯的生物碳：与商业级石墨烯纳米片的性质比较

Carbon Trends Pub Date : 2024-03-01 DOI: 10.1016/j.cartre.2024.100336

Haftom Weldekidan , Amar K. Mohanty , Lawrence T. Drzal , Manjusri Misra

引用次数: 0

Adsorption of corannulene on graphene 石墨烯对花冠烯的吸附作用

Carbon Trends Pub Date : 2024-03-01 DOI: 10.1016/j.cartre.2024.100334

Panyada Sripaturad , Ngamta Thamwattana , Amir Karton , Kyle Stevens , Duangkamon Baowan

引用次数: 0