Carbon Trends最新文献_第5页

Fabrication and evaluation of carbon black of waste Tyre-derived activated carbon electrodes for enhanced supercapacitor performance 制备和评估由废轮胎衍生的炭黑活性炭电极，以提高超级电容器性能

IF 3.1

Carbon Trends Pub Date : 2025-02-26 DOI: 10.1016/j.cartre.2025.100489

Damu V. Rupnar , Hemraj M. Yadav , A.V.S.L. Sai Bharadwaj , Pradip B. Sarawade , Niranjan S. Ramgir , Gajanan S. Ghodake , Bharat G. Pawar

{"title":"Fabrication and evaluation of carbon black of waste Tyre-derived activated carbon electrodes for enhanced supercapacitor performance","authors":"Damu V. Rupnar , Hemraj M. Yadav , A.V.S.L. Sai Bharadwaj , Pradip B. Sarawade , Niranjan S. Ramgir , Gajanan S. Ghodake , Bharat G. Pawar","doi":"10.1016/j.cartre.2025.100489","DOIUrl":"10.1016/j.cartre.2025.100489","url":null,"abstract":"<div><div>The growing demand for energy and the necessity for environmentally sustainable solutions necessitate the development of innovative materials. Activated carbon, widely used for supercapacitor electrodes, is traditionally derived from petroleum-based sources. This research presents a novel method for synthesizing activated carbon from waste tyres, offering a sustainable alternative additionally, it also incorporates a method for recycling the waste carbon materials. The waste tyre carbon was collected and chemically activated using an aqueous zinc chloride solution, followed by drying and calcination at different temperature. The electrochemical performance of the activated carbon electrodes was tested in both aqueous and ionic liquid electrolytes. The results demonstrated that the activated carbon electrodes achieved a specific capacitance of 1478.80 F/g at 100mV/s in an aqueous electrolyte. Additionally, in an ionic liquid electrolyte, the electrodes exhibited an energy density of 273.55 Wh/kg. These findings validate the effectiveness of waste tyre-derived activated carbon as a high-performance, sustainable material for energy storage applications, particularly in supercapacitors.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100489"},"PeriodicalIF":3.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619313","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-modified g-C3N4/ α-Fe2O3 systems for light-induced hydrogen generation 石墨烯修饰g-C3N4/ α-Fe2O3光致制氢体系

IF 3.1

Carbon Trends Pub Date : 2025-02-26 DOI: 10.1016/j.cartre.2025.100491

Wassila Touati , Miroslava Filip Edelmannová , Mohamed Karmaoui , Ahmed Bekka , Clarisse Furgeaud , Chakib Alaoui , Imene kadi Allah , Bruno Figueiredo , J.A. Labrincha , Raul Arenal , Kamila Koci , David Maria Tobaldi

{"title":"Graphene-modified g-C3N4/ α-Fe2O3 systems for light-induced hydrogen generation","authors":"Wassila Touati , Miroslava Filip Edelmannová , Mohamed Karmaoui , Ahmed Bekka , Clarisse Furgeaud , Chakib Alaoui , Imene kadi Allah , Bruno Figueiredo , J.A. Labrincha , Raul Arenal , Kamila Koci , David Maria Tobaldi","doi":"10.1016/j.cartre.2025.100491","DOIUrl":"10.1016/j.cartre.2025.100491","url":null,"abstract":"<div><div>Photocatalysis represents an advanced and efficient technology for harnessing light energy. The non-toxicity, affordability, and versatility of this technique render it particularly attractive for hydrogen production via water splitting. Nevertheless, the primary challenge lies in identifying materials capable of efficiently catalyzing the water splitting reaction upon exposure to light. This study presents the influence of the quantity of hematite and graphene on g-C<sub>3</sub>N<sub>4</sub> in the context of hydrogen generation from methanol-water decomposition under UVC irradiation. Pure g-C<sub>3</sub>N<sub>4</sub> exhibits the highest hydrogen generation efficiency. However, adding hematite decreases photocatalytic efficiency, likely due to the formation of a type II heterojunction between α-Fe<sub>2</sub>O<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>, which reduces the overall reduction capacity of the system. While incorporating graphene into the g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub> system enhances photocatalytic efficiency by improving electron mobility and prolonging the lifetime of photo-generated excitons, the highest yield was achieved with BUF10/GNP0.5. This research offers valuable insights into charge transfer and separation processes for photo-generated excitons within the g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub>/graphene systems in the context of light-induced hydrogen production.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100491"},"PeriodicalIF":3.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529594","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

Nanoconfined water phase transitions in infinite graphene slits: Molecular dynamics simulations and mean-field insights 无限石墨烯狭缝中的纳米限水相变：分子动力学模拟和平均场见解

IF 3.1

Carbon Trends Pub Date : 2025-02-25 DOI: 10.1016/j.cartre.2025.100485

Felipe Hawthorne, Virgília M.S. Neta, José A. Freire, Cristiano F. Woellner

{"title":"Nanoconfined water phase transitions in infinite graphene slits: Molecular dynamics simulations and mean-field insights","authors":"Felipe Hawthorne, Virgília M.S. Neta, José A. Freire, Cristiano F. Woellner","doi":"10.1016/j.cartre.2025.100485","DOIUrl":"10.1016/j.cartre.2025.100485","url":null,"abstract":"<div><div>Recent experimental and computational studies have demonstrated that nanoconfinement profoundly alters the phase behavior of water, facilitating complex phase transitions at pressures and temperatures far lower than typically observed in bulk systems. When combined with adsorption, nanoconfinement substantially enhances water uptake, primarily due to condensation occurring at the onset of the isotherm curve—a phenomenon intimately related to the facilitated formation of hydrogen bond networks. In this study, we adopt a dual approach to investigate water confined within infinite graphene slits. Our Molecular Dynamics simulations reveal hysteresis across all investigated temperatures. Unlike in finite slits, where hysteresis arises due to surface tension effects at the edges, in the case of infinite slits, the hysteresis is the result of a genuine phase transition at the nanoscale. We analyze the spatial and orientational arrangements of the water molecules, demonstrating how the graphene surface promotes the formation of a hydrogen bond network in the adjacent water layers. The remarkably low pressure required for water uptake in this nano-environment is explained at the mean-field level using a simple interacting lattice model. This is attributed to the exponential dependence of the critical pressure on the adsorbate–adsorbent interaction.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100485"},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508514","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

TEM-EELS study of compressed graphite phase in high-pressure and high-temperature treated neutron-irradiated graphite 高压高温处理中子辐照石墨中压缩石墨相的TEM-EELS研究

IF 3.1

Carbon Trends Pub Date : 2025-02-21 DOI: 10.1016/j.cartre.2025.100487

Yuta Ohsawa , Yohei K. Sato , Tomoya Saito , Masami Terauchi , Takashi Kitazume , Takumi Tokunaga , Yuji Higo , Keisuke Niwase , Masahito Niibe , Shin-ichi Honda

{"title":"TEM-EELS study of compressed graphite phase in high-pressure and high-temperature treated neutron-irradiated graphite","authors":"Yuta Ohsawa , Yohei K. Sato , Tomoya Saito , Masami Terauchi , Takashi Kitazume , Takumi Tokunaga , Yuji Higo , Keisuke Niwase , Masahito Niibe , Shin-ichi Honda","doi":"10.1016/j.cartre.2025.100487","DOIUrl":"10.1016/j.cartre.2025.100487","url":null,"abstract":"<div><div>The creation of new carbon materials has been attempted by treating neutron-irradiated graphite at high pressure and high temperature (HPHT) conditions. Recently, the formation of the compressed graphite (CG) with a (0002) plane distance of 3.2 Å, which is narrower than that of the graphite with a plane distance of 3.4 Å, was reported in the neutron-irradiated graphite processed under an HPHT condition. It is not clear what electronic structure, properties, and formation mechanism of the CG phase. In this study, electron energy-loss spectroscopy using a transmission electron microscope was applied to elucidate the electronic structure of the CG phase in the neutron-irradiated graphite sample with the HPHT treatment. The atomic layer distance of 3.2 Å for the CG phase was confirmed by an electron diffraction pattern. Dark-field images of 0002 spots of the CG phase showed the spatial distribution of the CG phase in the specimen. The electron energy-loss spectrum of the C K-edge of the CG showed a decrease in π* and σ* peak intensities, and the onset of the σ* peak shifted to the lower energy side compared with those of graphite. A first-principles calculation suggested that the electronic structure of graphite with the interlayer bond relating to the interstitial atoms and lattice vacancies should be reasonable for the electronic structure of the CG examined. Thus, the interlayer bonds formed by the interstitial atoms and the lattice vacancies introduced by neutron irradiation should contribute to the formation of the CG phase.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100487"},"PeriodicalIF":3.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526843","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

Enhanced luminescent properties of carbon quantum dots on thermo-responsive vinylcaprolactam hydrogel matrix 热响应型乙烯基己内酰胺水凝胶基质上碳量子点的增强发光性能

IF 3.1

Carbon Trends Pub Date : 2025-02-20 DOI: 10.1016/j.cartre.2025.100484

Emilia Villegas , Antonio Diaz-Barrios , Gema González , Johnny Chimborazo , Carlos Reinoso , Manuel Caetano , Lola de Lima , Jules Gardener , Guillermo Solorzano

{"title":"Enhanced luminescent properties of carbon quantum dots on thermo-responsive vinylcaprolactam hydrogel matrix","authors":"Emilia Villegas , Antonio Diaz-Barrios , Gema González , Johnny Chimborazo , Carlos Reinoso , Manuel Caetano , Lola de Lima , Jules Gardener , Guillermo Solorzano","doi":"10.1016/j.cartre.2025.100484","DOIUrl":"10.1016/j.cartre.2025.100484","url":null,"abstract":"<div><div>This research consistsof the preparation and luminescence assessment of hybrid materials made by mixing carbon quantum dots (CQDs) obtained, by a hydrothermal process, from avocado seeds, and vinyl caprolactam (VCL) based thermo-responsive hydrogels. These hydrogels were made by aqueous emulsion homo polymerization of VCL or by the copolymerization of VCL with polyethylene glycol diacrylate (PEGDA), as crosslinking agent. The hybrid materials, hydrogels and CQDs were characterized by FTIR, Raman and XPS spectroscopies and to determine the particle sizes of the different obtained materials either High Resolution Transmission Electron Microscopy (HR-TEM) or Dynamic Light Scattering (DLS) were used. It was found that the combination of the VCL based hydrogels with carbon dots causes an enhancement on the photoluminescence when compared with the bare CQDs. Moreover, an increase in the crosslinking degree of the hydrogel polymeric gel corresponded to more enhancement in the photoluminescence intensity of the hybrid materials. The aforementioned luminescent performance and the biocompatible properties of its components position these materials as potential biomedical thermo-responsive sensors</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100484"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512693","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

Enhanced water purification by using graphene oxide nano-membranes: A novel approach for mitigating industrial pollutant 氧化石墨烯纳米膜强化水净化：一种减轻工业污染物的新方法

IF 3.1

Carbon Trends Pub Date : 2025-02-17 DOI: 10.1016/j.cartre.2025.100486

Rizwana Yasmeen , Falak Sher Khan , Waqar Un Nisa , Aansa Rukya Saleem , Muhammad Awais , Mohammed Jameel , Rebwar Nasir Dara , M․Ijaz Khan

{"title":"Enhanced water purification by using graphene oxide nano-membranes: A novel approach for mitigating industrial pollutant","authors":"Rizwana Yasmeen , Falak Sher Khan , Waqar Un Nisa , Aansa Rukya Saleem , Muhammad Awais , Mohammed Jameel , Rebwar Nasir Dara , M․Ijaz Khan","doi":"10.1016/j.cartre.2025.100486","DOIUrl":"10.1016/j.cartre.2025.100486","url":null,"abstract":"<div><div>Clean access to clean and safe drinking water is vital for human health, yet water pollution continues to be a significant global issue. This study investigates water contamination caused by various pollutants such as industrial waste, sewage, radioactive substances, and shifting rainfall patterns, all of which pose risks to public health and economic stability. To address this issue, we utilized graphene oxide nanomaterials for water purification, taking advantage of their exceptional strength and distinct two-dimensional structure. Graphene oxide nanoparticles were produced using Hummer's method and integrated into cellulose filter paper through a dip-coating process, resulting in a novel filtration membrane. The novel developed for the graphene oxide-coated cellulose membrane demonstrated substantial enhancements in water quality across samples collected from urban, rural and the industrial areas in Sialkot. The notable findings include a significant reduction in electrical conductivity (EC) and an improved Sodium Adsorption Ratio (SAR) IN which suggests better filtration performance. The membrane effectively reduced sodium ion levels and alleviated salinity issues, making the water more suitable for agricultural use. So, the changes in pH levels were particularly noticeable in industrial zones, emphasizing the effect of industrial waste on water quality. The outcomes that highlight the promise of graphene oxide nanomembranes as a sustainable and efficient approach to reducing water pollution. This research emphasizes the critical role of advanced nanotechnology-based purification techniques in tackling the growing problem of water contamination and the leading to enhanced water management strategies and safer drinking water.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100486"},"PeriodicalIF":3.1,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488581","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

Comparison of microwave heating of pure and functionalized graphene-nanoplatelet polymer composites: experimental and finite element Study 微波加热纯石墨烯与功能化石墨烯纳米板聚合物复合材料的比较：实验与有限元研究

IF 3.1

Carbon Trends Pub Date : 2025-02-14 DOI: 10.1016/j.cartre.2025.100481

Mahima Dua , Qi Zhang , Pierre Mertiny

{"title":"Comparison of microwave heating of pure and functionalized graphene-nanoplatelet polymer composites: experimental and finite element Study","authors":"Mahima Dua , Qi Zhang , Pierre Mertiny","doi":"10.1016/j.cartre.2025.100481","DOIUrl":"10.1016/j.cartre.2025.100481","url":null,"abstract":"<div><div>Microwave heating can potentially speed up the joining of thermoplastic polymer components compared to modern electrofusion procedures that employ embedded wires for Joule heating. This could result in shorter fusion times, improved heating consistency, and lower energy usage. This work examines how functionalized graphene nanoplatelets (fGNP) can create multifunctional polylactide acid (PLA) composites with substantial microwave absorption. Tannic acid was used to treat graphene nanoplatelets, resulting in fGNP. The fGNP/PLA nanocomposites were produced using a two-step scalable manufacturing process that involved solution blending and hot compression moulding. The composites' fGNP concentration ranged between 0 and 8% by weight. The samples were evaluated for dielectric permittivity, heat capacity, and electrical and thermal conductivity. Thermal imaging was utilized to determine the effectiveness of microwave heating in fGNP/PLA nanocomposites as a function of microwave power and filler weight fraction. The microwave heating process in the composites was investigated using Multiphysics finite element software. The experimental results were compared to numerical model projections of the maximum temperature and microwave energy absorbed. The experimental and computational results for fGNP/PLA nanocomposites were contrasted to similar results for plain (non-functionalized) GNP in PLA. The generated nanocomposites were discovered to have excellent microwave absorption properties and, hence, quick heating, making this composite type a promising candidate for gasket materials that promote fusion bonding for thermoplastic-based components by localized heating.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100481"},"PeriodicalIF":3.1,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455054","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

Solvent free mechanical grinding assisted synthesis of reduced graphene oxide and its composites with porphyrins for fabricating UV–vis photodetectors 无溶剂机械研磨辅助合成还原氧化石墨烯及其与卟啉的复合材料，用于制造紫外可见光光电探测器

IF 3.1

Carbon Trends Pub Date : 2025-02-13 DOI: 10.1016/j.cartre.2025.100482

Indranee Hazarika , Saponjeet Borah , Amreen Ara Hussain , Deepali Sarkar , Bedanta Gogoi

{"title":"Solvent free mechanical grinding assisted synthesis of reduced graphene oxide and its composites with porphyrins for fabricating UV–vis photodetectors","authors":"Indranee Hazarika , Saponjeet Borah , Amreen Ara Hussain , Deepali Sarkar , Bedanta Gogoi","doi":"10.1016/j.cartre.2025.100482","DOIUrl":"10.1016/j.cartre.2025.100482","url":null,"abstract":"<div><div>Reduced graphene oxide (rGO) is one of the most demanding carbon based materials for energy conversion and optoelectronics. However, its synthesis from graphene oxide (GO) is still challenging and requires high-energy consumption with longer reaction time. Herein, a solvent free mechanical grinding (MG) method was realized for synthesizing rGO from GO by mechanical grinding for 30 minutes (MG-0.5H) and one hour (MG-1H). The formation of rGO was confirmed spectroscopically with substantial oxygen reduction in MG-1H, restoration of sp<sup>2</sup> conjugation, and the C/O ratio of approximately 5.59. Furthermore, we prepared its composites with hemin (Hm) and protoporphyrin IX (P IX) using an ex-situ (E) MG method, along with conventional solvent assisted in-situ (I) method and named as rGO-HmE, rGO-P(IX)E, GO-HmI, rGO-P(IX)I. These materials were subjected to a facile technique for fabricating photodetectors that exhibit detectivity of 1.43 × 10<sup>13</sup>, 2.68 × 10<sup>13</sup>, 9.98 × 10<sup>13</sup>, and 4.91 × 10<sup>13</sup> Jones respectively. Such high detectivity is due to π-π interaction and electron transfer between rGO and the porphyrins and hence the materials do not require supporting materials such as electron and hole transport layer to enhance the efficacy of the photodetectors. Therefore, it can be stated that the mechanical grinding method serve as a greener alternative with low-cost, low-energy consumption, short reaction time for the synthesis of superior optoelectronic material and its composites.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100482"},"PeriodicalIF":3.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446014","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

Comparative evaluation of cationic and anionic dye removal using graphene oxide fabricated by Hummers and Couette-Taylor flow methods 用Hummers和Couette-Taylor流动法制备氧化石墨烯去除阳离子和阴离子染料的比较评价

IF 3.1

Carbon Trends Pub Date : 2025-02-08 DOI: 10.1016/j.cartre.2025.100476

Chaehwi Lim , Namgyu Kim , Junho Lee , Yeojoon Yoon

{"title":"Comparative evaluation of cationic and anionic dye removal using graphene oxide fabricated by Hummers and Couette-Taylor flow methods","authors":"Chaehwi Lim , Namgyu Kim , Junho Lee , Yeojoon Yoon","doi":"10.1016/j.cartre.2025.100476","DOIUrl":"10.1016/j.cartre.2025.100476","url":null,"abstract":"<div><div>Graphene oxide (GO) has garnered significant attention from researchers owing to its exceptional physicochemical properties. GO is typically synthesized through chemical oxidation followed by exfoliation processes. In this study, we employed the Hummers method and the Couette-Taylor flow method to produce GO. The Couette-Taylor flow method offers the advantage of shorter oxidation reaction times and reduced wastewater compared to the Hummers method. We conducted surface analysis (including scanning electron microscope(SEM), X-ray photoelectron spectroscopy(XPS), Zeta potential, multiple-point Brunauer Emmett Teller(BET), and atomic force microscope(AFM)) to assess and compare the surface characteristics of GO. Our analysis revealed that GO synthesized using the Couette-Taylor flow method (GO/Taylor) exhibited smaller lateral sizes. Additionally, we performed Particle Size Distribution Analysis (PSA) to verify the particle distribution of GO. The mean particle sizes of GO produced via the Hummers method and the Couette-Taylor flow method were determined to be 49.87 μm and 28.97 μm, respectively. These differences in surface properties and particle sizes influenced the adsorption capacity of GO for dyes. Considering the polarity, Cationic dye (BV1) and anionic dye (RR141) were selected for our adsorption experiments based on their polarity. Furthermore, we employed kinetic and isotherm adsorption modeling to analyze the adsorption mechanism in detail.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100476"},"PeriodicalIF":3.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396255","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

Electrospun polyvinylpyrrolidone fibers with cobalt ferrite nanoparticles 含钴铁氧体纳米粒子的静电纺丝聚乙烯吡咯烷酮纤维

IF 3.1

Carbon Trends Pub Date : 2025-02-05 DOI: 10.1016/j.cartre.2025.100478

Vinicio J. Cevallos , Sarah Briceño , Guillermo Solorzano , Jules Gardener , Alexis Debut , Raúl Dávalos , Werner Bramer-Escamilla , Gema González

{"title":"Electrospun polyvinylpyrrolidone fibers with cobalt ferrite nanoparticles","authors":"Vinicio J. Cevallos , Sarah Briceño , Guillermo Solorzano , Jules Gardener , Alexis Debut , Raúl Dávalos , Werner Bramer-Escamilla , Gema González","doi":"10.1016/j.cartre.2025.100478","DOIUrl":"10.1016/j.cartre.2025.100478","url":null,"abstract":"<div><div>Polyvinylpyrrolidone (PVP) fibers with cobalt ferrite nanoparticles (CoFe<sub>2</sub>O<sub>4</sub>) were prepared by an electrospinning technique to study the electrical resistance and magnetic properties of the nanocomposite. The samples were characterized using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). Magnetic properties were measured using vibrating sample magnetometry (VSM). PVP fibers showed an average diameter of <span><math><mrow><mn>3</mn><mo>.</mo><mn>74</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> with a resistance of 121.58 G<span><math><mi>Ω</mi></math></span> and <span><math><mrow><mn>2</mn><mo>.</mo><mn>22</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> and 1.20 G<span><math><mi>Ω</mi></math></span> with the incorporation of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles. Cobalt ferrite nanoparticles have a maximum magnetization of 81.9 emu/g, and the CoFe<sub>2</sub>O<sub>4</sub>/PVP fibers present a diamagnetic behavior with a maximum magnetization of 0.07 emu/g. Combining the versatility of PVP as a polymer matrix with the magnetic and electric properties of cobalt ferrite nanoparticles, this nanocomposite may open up new potential applications for developing electrically conductive novel nanomaterials and devices.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100478"},"PeriodicalIF":3.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377756","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