Carbon Trends最新文献_第2页

Effect of nanostructured graphene on the physicochemical and mechanical properties of Cassava starch (Manihot esculenta) coated cellulose paperboards 纳米结构石墨烯对木薯淀粉涂布纤维素纸板理化和力学性能的影响

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-03 DOI: 10.1016/j.cartre.2025.100599

Alessandra R. Rinaldi , Laura D.C. Castañeda , Silvia Faria da Rocha , Eliana B. Souto , Viktor O.C. Concha , Classius Ferreira da Silva , Cristiana M.P. Yoshida

Graphene is derived from graphite and consists of pure carbon. It can be used to produce nanostructured compounds that are incorporated in packaging materials to improve physicochemical and mechanical properties. The application of coatings made from natural polymers, such as starch, has been studied as an alternative to partially replace synthetic polymers in paper-based multilayer materials commonly used in packaging, meeting the demands of consumers with increasing environmental concerns. In this work, we describe the first-time use of a modified cassava (Manihot esculenta) starch film (4 %, m/V) coating, in which graphene has been incorporated at two different concentrations (0.2 % versus 0.4 % m/V), and characterized for its suitability for the coating of paperboard. The presence of graphene in the coating significantly influenced the physicochemical properties of the coating. The Cobb test indicated greater water retention in the coatings containing graphene, but the moisture barrier increased by 87.8 % with the one composed of 0.4 % graphene. In paperboards coated with starch containing 0.4 % graphene, the air permeance decreased by 27 % and fat barrier properties increased, compared to uncoated paperboard. The Taber stiffness was also improved with the presence of graphene in the coatings, indicating that the paperboards became more rigid. The tear strength and tensile strength of the coated paperboards also improved, while elongation and bursting remained unchanged. With the outcomes of this work, we confirm that starch coating containing graphene offers a promising alternative to polymeric lamination on cellulosic matrices, promoting sustainability in packaging and improving the final properties of the paperboard.

石墨烯由石墨衍生而来，由纯碳组成。它可以用来生产纳米结构的化合物，这些化合物被加入到包装材料中，以改善物理化学和机械性能。研究了以淀粉等天然聚合物制成的涂料在包装中常用的纸基多层材料中部分替代合成聚合物的应用，以满足日益关注环境的消费者的需求。在这项工作中，我们首次使用了一种改性木薯（Manihot esculenta）淀粉膜（4%,m/V）涂层，其中石墨烯以两种不同的浓度（0.2%和0.4% m/V）掺入，并以其适合纸板涂层为特征。石墨烯在涂层中的存在显著影响了涂层的物理化学性能。Cobb测试表明，含有石墨烯的涂层的保水能力更强，但含有0.4%石墨烯的涂层的防潮性能提高了87.8%。与未涂布的纸板相比，涂布含有0.4%石墨烯的淀粉的纸板透气性降低了27%，脂肪阻隔性能提高。涂层中石墨烯的存在也提高了Taber刚度，这表明纸板变得更加坚硬。涂布纸板的撕裂强度和拉伸强度均有提高，而伸长率和破裂率保持不变。根据这项工作的结果，我们证实含有石墨烯的淀粉涂层为纤维素基质上的聚合物层压提供了一种有希望的替代方案，可以促进包装的可持续性并改善纸板的最终性能。

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引用次数: 0

Carbonaceous solid acids for glycerol acetylation: From waste-derived biochars to engineered graphenes 用于甘油乙酰化的碳质固体酸：从废物衍生的生物炭到工程石墨烯

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-02 DOI: 10.1016/j.cartre.2025.100601

Nur Hidayati, Nabilah Miftachul Jannah, Herry Purnama, Tri Widayatno, Azzahra Ardya Kamaratih, Rio Alviani Ari Setiawan

The oversupply of glycerol from biodiesel production poses economic and environmental challenges. Glycerol acetylation to acetins (mono-, di-, tri-) is a promising valorization route. This review explores carbonaceous solid acids, including biochars, graphene-based materials, CNTs, and hybrids, for glycerol acetylation. Analysis from 2000 to 2025 using PRISMA identifies correlations between acid-site density, morphology, and catalytic outcomes. Biochars offer low-cost, sustainable solutions but face stability issues. Graphene-based catalysts and CNTs provide high conversion but struggle with scaling. Hybrid systems optimize performance, yet gaps in experimental standardization, deactivation mechanisms, and crude glycerol adaptation remain. Addressing these challenges will enhance industrial viability.

生物柴油生产中甘油的供过于求给经济和环境带来了挑战。甘油乙酰化制乙酰（单-、二-、三-）是一种很有前途的酯化途径。本文综述了用于甘油乙酰化的碳质固体酸，包括生物炭、石墨烯基材料、碳纳米管和杂化物。从2000年到2025年，使用PRISMA分析确定了酸位密度、形态和催化结果之间的相关性。生物炭提供了低成本、可持续的解决方案，但面临稳定性问题。石墨烯基催化剂和碳纳米管提供高转化率，但难以结垢。混合系统优化了性能，但在实验标准化、失活机制和粗甘油适应性方面仍然存在差距。解决这些挑战将提高工业的生存能力。

引用次数: 0

Complete hydrolysis of organosulfates yields to complete exfoliation of graphite oxide 有机硫酸盐完全水解产生氧化石墨完全剥落

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-02 DOI: 10.1016/j.cartre.2025.100600

Adelia López-Pérez , Juana M. Pérez , Ignacio Fernández , Ignacio Martín-Gullón , Iluminada Rodríguez-Pastor

Graphene oxide (GO) is a highly versatile material with broad applications, but its acidic nature and the presence of sulfur-containing groups poses significant challenges for biomedical and environmental uses. These groups, mainly in the form of organosulfates, contribute to excessive acidity, which affects the stability of GO and complicates large-scale production due to the need for multiple washing steps. This study is focused on developing an efficient method to fully remove organosulfates. By combining basic and organic acid treatments, complete hydrolysis of sulfate groups was achieved, leading to a significant reduction in acidity and, contrary to expectations, facilitating the exfoliation of GO without requiring additional sonication. This might be due to some organosulfates bound to carbons of different graphite layers. The optimized process resulted in monolayer-rich GO with enhanced dispersion stability, making it more suitable for a wider range of applications. These findings offer a scalable and effective approach to improving the chemical purity and structural properties of GO, expanding its potential in advanced technologies.

氧化石墨烯（GO）是一种用途广泛的高用途材料，但其酸性和含硫基团的存在对生物医学和环境用途构成了重大挑战。这些基团主要以有机硫酸盐的形式存在，导致酸度过高，从而影响氧化石墨烯的稳定性，并由于需要多个洗涤步骤而使大规模生产复杂化。本研究的重点是开发一种有效的方法来完全去除有机硫酸盐。通过结合碱性和有机酸处理，实现了硫酸盐基团的完全水解，导致酸度显著降低，并且与预期相反，无需额外的超声处理即可促进氧化石墨烯的去角质。这可能是由于一些有机硫酸盐与不同石墨层的碳结合。优化后的工艺产生了富含单层的氧化石墨烯，具有增强的分散稳定性，使其更适合于更广泛的应用。这些发现为提高氧化石墨烯的化学纯度和结构特性提供了一种可扩展和有效的方法，扩大了其在先进技术中的潜力。

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引用次数: 0

Temperature dependence of charge transport in single-layer graphene on surface-terminated diamond 表面端接金刚石上单层石墨烯电荷输运的温度依赖性

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-02 DOI: 10.1016/j.cartre.2025.100598

Aisuluu Aitkulova, Markus Gabrysch, Saman Majdi, Nattakarn Suntornwipat, Jan Isberg

The integration of single-layer graphene with diamond substrates offers a promising platform for high-performance electronic devices by utilizing the exceptional properties of both materials. This study describes a fabrication process and transport measurements of single-layer graphene devices on diamond substrates featuring two surface terminations: hydrogen (H-terminated, thermal process) and oxygen (O-terminated, plasma treatment). The carrier transport properties were investigated using Hall effect measurements over a broad temperature range (80–400 K) under high-vacuum conditions (

1 \times 1 0^{- 4}

mbar). Our findings reveal that thermal annealing significantly improves the graphene-diamond interface quality, causing a notable increase in carrier mobility for devices on both H- and O-terminated from 1439 to 1644 cm

^{2} /

Vs and from 1238 to 1340 cm

^{2} /

Vs, respectively. We also found that the effect of remote interfacial phonon scattering on high-temperature mobility is affected by the termination type. These findings highlight the importance of substrate surface engineering and offer a pathway for optimizing graphene-diamond heterostructures for advanced electronic applications.

单层石墨烯与金刚石衬底的集成利用了这两种材料的特殊性能，为高性能电子器件提供了一个有前途的平台。本研究描述了金刚石衬底上单层石墨烯器件的制造过程和输运测量，具有两种表面末端：氢（h端，热处理）和氧（o端，等离子处理）。在高真空条件下（1×10−4 mbar），利用霍尔效应测量了载流子在宽温度范围（80-400 K）内的输运特性。我们的研究结果表明，热退火显著提高了石墨烯-金刚石界面质量，导致H端和o端器件的载流子迁移率分别从1439到1644 cm2/Vs和从1238到1340 cm2/Vs显著增加。我们还发现远端界面声子散射对高温迁移率的影响受终端类型的影响。这些发现突出了衬底表面工程的重要性，并为优化先进电子应用中的石墨烯-金刚石异质结构提供了一条途径。

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引用次数: 0

Dual-transition metal MXene-supported high-entropy-alloy platinum group metal catalysts for oxygen reduction reaction: A focused review 氧还原反应中双过渡金属mxene负载高熵合金铂族金属催化剂的研究进展

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-01 DOI: 10.1016/j.cartre.2025.100594

Philani V. Hlophe , Huanlei Zhao , Guoning Li , Kenate N Nigussa , Shidong Song , Phumlani F. Msomi

The sluggish kinetics of the oxygen reduction reaction (ORR) significantly hinder the performance of proton exchange membrane fuel cells (PEMFCs). Although platinum (Pt)-based catalysts are the current benchmark, their high cost and limited stability demand a more advanced alternative. This critical review examines dual-transition metal-supported high-entropy alloy platinum group metals (HEA-PGM/DTM-MXene), focusing on the structural engineering challenges necessary to unlock their full potential. We argue that the rational design of components, guided by computational pre-screening, combined with the structural confinement offered by the 2D support, represents the primary path forward. We detail the complex synthesis challenges, analyze the performance gaps using representative Pt-alloy/MXene systems in full PEMFC devices, and conclude by defining the critical research questions required to achieve the projected performance targets. This work establishes a materials-centric framework for the future development of these complex electrocatalysts, aligning the structural control of the DTM-MXene with the kinetic tuning of the HEA-PGM.

氧还原反应（ORR）动力学迟缓严重影响了质子交换膜燃料电池（pemfc）的性能。虽然铂基催化剂是目前的基准，但其高成本和有限的稳定性需要更先进的替代品。这篇综述研究了双过渡金属支撑的高熵合金铂族金属（HEA-PGM/DTM-MXene），重点关注了释放其全部潜力所必需的结构工程挑战。我们认为，在计算预筛选的指导下，合理设计组件，结合二维支撑提供的结构约束，代表了主要的前进道路。我们详细介绍了复杂的合成挑战，分析了完整PEMFC器件中具有代表性的pt合金/MXene系统的性能差距，并通过定义实现预期性能目标所需的关键研究问题来总结。这项工作为这些复杂电催化剂的未来发展建立了一个以材料为中心的框架，将DTM-MXene的结构控制与HEA-PGM的动力学调节结合起来。

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引用次数: 0

Fabrication and characterization of polycaprolactone/chitosan/graphene quantum dots nanocomposite scaffolds with potential application in neural tissue engineering 聚己内酯/壳聚糖/石墨烯量子点纳米复合支架的制备与表征

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-12-01 DOI: 10.1016/j.cartre.2025.100595

Reza Salehi , Mehdi Ebrahimian-Hosseinabadi , Mohammad Rafienia

The ability to develop a polymeric scaffold with suitable electrical conductivity for an ideal nerve tissue engineering scaffold has been a persistent challenge for researchers. In this study, five nanocomposite scaffolds based on polycaprolactone (PCL), a synthetic polymer providing mechanical strength, natural biocompatible chitosan, and graphene quantum dots (GQDs) to enhance conductivity, were fabricated via electrospinning, a technique known for producing thin, uniformly aligned fibers. The scaffolds were characterized structurally using X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), confirming uniform distribution and significant impact of GQDs on fiber structure. Scanning electron microscopy (SEM) and fluorescence microscopy revealed a substantial reduction in fiber diameter by approximately 70 % and the presence of GQDs along the fibers. Electrical testing showed that increasing GQD content from 0.5 to 1 wt% notably decreased electrical resistance (from ∼1883 to 133 Ω), enhancing conductivity. Degradation studies in PBS over two months demonstrated an increase in degradation rate proportional to GQD content, with some scaffolds exhibiting up to 60 % degradation. Mechanical tensile testing indicated improved strength and elastic modulus with 0.5 to 1 wt% GQDs, whereas higher contents caused brittleness and strength reduction. Biological evaluation using PC12 cells showed a 4–7 % increase in cell viability upon adding 0.5 to 2 wt% GQDs, while 4 wt% induced cytotoxicity. Considering the combined biological, physical, and mechanical results, scaffolds S₂ and S₃ emerged as the best candidates for electrically conductive and biocompatible scaffolds suitable for peripheral nerve tissue engineering. These findings highlight the promising potential of these nanocomposites for nerve tissue repair applications.

如何开发具有合适导电性的聚合物支架作为理想的神经组织工程支架一直是研究人员面临的挑战。在这项研究中，五种基于聚己内酯（PCL）的纳米复合支架（PCL是一种提供机械强度的合成聚合物）、天然生物相容性壳聚糖和石墨烯量子点（GQDs）来增强导电性)通过静电纺丝（一种众所周知的生产薄且均匀排列的纤维的技术）制成。利用x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对支架进行了结构表征，证实了GQDs分布均匀且对纤维结构有显著影响。扫描电子显微镜（SEM）和荧光显微镜显示纤维直径减少了约70%，并且沿纤维存在GQDs。电学测试表明，将GQD含量从0.5 wt%增加到1 wt%，显著降低电阻（从~ 1883到133 Ω），提高电导率。在PBS中进行的两个月以上的降解研究表明，降解率与GQD含量成正比，一些支架的降解率高达60%。力学拉伸试验表明，添加0.5 ~ 1 wt% GQDs可提高材料的强度和弹性模量，而添加更高的GQDs会导致材料的脆性和强度降低。使用PC12细胞进行的生物学评价显示，添加0.5 ~ 2 wt% GQDs后，细胞活力增加4 ~ 7%，而4 wt% GQDs诱导细胞毒性。综合生物学、物理和力学结果，S2和S3是适合周围神经组织工程的导电和生物相容性支架的最佳候选材料。这些发现突出了这些纳米复合材料在神经组织修复应用方面的巨大潜力。

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引用次数: 0

Magnetic carbon nanotube-enhanced imidazolium ionic liquid (CNTs-ZnFe2O4-IL); A novel catalyst for selective oxidation of benzyl alcohol to benzaldehyde 磁性碳纳米管增强咪唑离子液体（CNTs-ZnFe2O4-IL）苯甲醇选择性氧化制苯甲醛的新型催化剂

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-11-26 DOI: 10.1016/j.cartre.2025.100597

Mohammad Abushuhel , Ramin Javahershenas , Rekha M. M , Shaker Al-Hasnaawei , Kattela Chennakesavulu , Renu Sharma , Aashna Sinha

This work reports a multifunctional nanocatalyst, CNTs-ZnFe₂O₄-IL, designed for efficient, selective, and magnetically recoverable oxidation of alcohols to aldehydes. The catalyst integrates zinc ferrite (ZnFe₂O₄) nanoparticles onto carboxyl-functionalized carbon nanotubes (CNTs) and immobilizes them with an imidazolium-based ionic liquid. Characterization by XRD, FTIR, TEM, TGA, VSM, SEM-EDX, and BET confirms successful synthesis and the advantageous architecture: magnetic ZnFe₂O₄ facilitates easy magnetic separation, CNTs provide high surface area and improved nanoparticle dispersion, and the ionic liquid layer offers unique solvating and activating properties that enhance catalysis. Catalytic performance was demonstrated in the selective oxidation of benzyl alcohol to benzaldehyde using tert‑butyl hydroperoxide (TBHP) as a green oxidant. At 50 °C, the catalyst delivered exceptionally high yields (90–97 %) across a broad substrate scope of 21 substituted benzyl alcohols, displaying strong functional group tolerance and high selectivity toward aldehyde without over-oxidation to benzoic acid. The magnetic nature enables straightforward recovery, and the catalyst-maintained activity and selectivity over six consecutive reuse cycles with negligible performance loss. CNTs-ZnFe₂O₄-IL offers a sustainable, cost-effective protocol for aerobic oxidations, aligning with green chemistry principles by eliminating solvents, minimizing waste, and enabling easy catalyst recycling.

这项工作报道了一种多功能纳米催化剂，CNTs-ZnFe₂O₄-IL，设计用于高效，选择性和磁可回收的醇氧化成醛。该催化剂将铁酸锌（ZnFe₂O₄）纳米颗粒整合到羧基功能化碳纳米管（CNTs）上，并用咪唑基离子液体将其固定。通过XRD、FTIR、TEM、TGA、VSM、SEM-EDX和BET的表征证实了成功的合成和优越的结构：磁性ZnFe₂O₄易于磁分离，CNTs提供高表面积和改善的纳米颗粒分散性，离子液体层具有独特的溶剂化和活化性能，增强了催化作用。以过氧化叔丁基（TBHP）为绿色氧化剂，研究了苯甲醇选择性氧化制苯甲醛的催化性能。在50°C时，该催化剂在21个取代苯甲醇的广泛底物范围内提供了异常高的产率（90 - 97%），表现出很强的官能团耐受性和对醛的高选择性，而不会过度氧化为苯甲酸。磁性特性使其能够直接回收，并且在连续六个重复使用循环中保持催化剂的活性和选择性，性能损失可以忽略不计。CNTs-ZnFe₂O₄-IL为有氧氧化提供了一种可持续的，具有成本效益的方案，通过消除溶剂，最大限度地减少浪费，并使催化剂易于回收，符合绿色化学原则。

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引用次数: 0

Optical anisotropy of 6-A graphene nanoribbons synthesized inside aligned nanotubes 排列纳米管内合成的6-A石墨烯纳米带的光学各向异性

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-11-24 DOI: 10.1016/j.cartre.2025.100596

Natalia R. Arutyunyan , Alexander A. Tonkikh , Pavel V. Fedotov , Dmitry V. Rybkovskiy , Ekaterina A. Obraztsova , Wanyu Dai , Xiang Rong , Shigeo Maruyama , Elena D. Obraztsova

6- atom-wide armchair graphene nanoribbons (6-AGNRs) are synthesized through two-step process inside a matrix of single-walled carbon nanotubes (SWCNTs) pre-aligned by controlled vacuum filtration method. The typical Raman modes of nanoribbons as radial breathing-like mode at 453 cm^-1, edge CH mode at 1245 cm^-1 and middle-range mode at 1270 cm^-1 appear in the Raman spectra alongside with the modes of carbon nanotubes. Polarized Raman spectra reveal the strong anisotropy of the signal depending on the orientation of the sample, as the alignment of nanoribbons is provided by the alignment of the nanotube host matrix. This result is in agreement with polarized Raman density functional theory (DFT) calculations carried out for the main vibrational modes of the 6-AGNR. The proposed method ensures the alignment of graphene nanoribbons (GNRs) on a macroscale and preserves the anisotropy of their optical properties.

6-原子宽扶手型石墨烯纳米带（6- agnrs）是在单壁碳纳米管（SWCNTs）基质中通过控制真空过滤法预先排列的两步法合成的。在拉曼光谱中，纳米带的典型拉曼模式为453 cm-1的径向呼吸模式、1245 cm-1的边缘CH模式和1270 cm-1的中程模式。极化拉曼光谱揭示了信号的强各向异性，这取决于样品的方向，因为纳米带的排列是由纳米管宿主矩阵的排列提供的。这一结果与对6-AGNR的主要振动模式进行的偏振拉曼密度泛函理论（DFT）计算一致。该方法保证了石墨烯纳米带（gnr）在宏观尺度上的排列，并保持了其光学性质的各向异性。

引用次数: 0

Evidence of plasma-driven nonequilibrium chemistry in graphene formation from gas-phase kinetic modeling 来自气相动力学模型的石墨烯形成中等离子体驱动的非平衡化学的证据

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-11-17 DOI: 10.1016/j.cartre.2025.100592

Tooran Tavangar, Nick A Eaves

Graphene can be synthesized entirely in the gas phase within microwave-assisted reactors operating at atmospheric pressure. Although these systems are sustained by plasmas with extremely high local temperatures, graphene formation occurs downstream where chemical kinetics govern molecular growth. A one-dimensional plug-flow model coupled with a sectional aerosol framework is used to evaluate how different detailed gas-phase chemical mechanisms influence graphene formation from an ethanol precursor. Five mechanisms commonly used for polycyclic aromatic hydrocarbon (PAH) chemistry—ABF, DLR, CALTECH, KAUST, and CRECK—are compared with experimental measurements of graphene yield and Feret diameter. The mechanisms predict very different onsets of graphene formation. Notably, the KAUST mechanism, despite its unrealistic assumption of irreversible PAH growth, reproduces experimental trends most closely. This outcome suggests that the plasma environment maintains a chemically frozen state where large PAHs behave as effectively irreversible species. Comparison between kinetic and equilibrium calculations confirms that PAH concentrations in the post-plasma region exceed equilibrium predictions by 18–20 orders of magnitude. Because the model itself does not include plasma physics, this kinetic–equilibrium disparity provides indirect, but not exclusive, evidence that plasma-driven processes push the system far from chemical equilibrium and enable the rapid molecular growth required for graphene formation. These findings explain why equilibrium models fail to predict graphene synthesis and demonstrate that model discrepancies can expose hidden nonequilibrium mechanisms.

石墨烯可以在大气压力下的微波辅助反应器中完全在气相中合成。虽然这些系统是由等离子体在极高的局部温度下维持的，但石墨烯的形成发生在化学动力学控制分子生长的下游。一维塞流模型与截面气溶胶框架相结合，用于评估不同的详细气相化学机制如何影响乙醇前体形成石墨烯。五种常用的多环芳烃（PAH）化学机制- abf， DLR， CALTECH， KAUST和creck -与石墨烯产率和Feret直径的实验测量进行了比较。这些机制预测了石墨烯形成的非常不同的开始。值得注意的是，KAUST机制尽管不切实际地假设了不可逆的多环芳烃生长，但它最接近地再现了实验趋势。这一结果表明，等离子体环境保持一种化学冻结状态，在这种状态下，大的多环芳烃表现为有效的不可逆物质。动力学和平衡计算之间的比较证实，等离子体后区域的多环芳烃浓度超过平衡预测18-20个数量级。由于模型本身不包括等离子体物理，这种动力学平衡差异提供了间接的，但不是唯一的证据，表明等离子体驱动的过程使系统远离化学平衡，并使石墨烯形成所需的快速分子生长成为可能。这些发现解释了平衡模型无法预测石墨烯合成的原因，并表明模型差异可以揭示隐藏的非平衡机制。

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引用次数: 0

Optimized nickel-activated carbon catalysts for efficient SO2 reduction with methane: Performance and lifetime comparative analysis with alumina 优化的镍活性炭催化剂用于甲烷高效还原二氧化硫：与氧化铝的性能和寿命比较分析

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-11-11 DOI: 10.1016/j.cartre.2025.100591

Seyyed Ebrahim Mousavi , Mohammad Javad Azarhoosh , Saeed Abbasizadeh , Hassan Pahlavanzadeh , Habib Ale Ebrahim

The catalytic removal of sulfur dioxide (SO₂) was evaluated using methane (CH₄) as a reductant, focusing on nickel catalysts supported on activated carbon. Various compositions of nickel oxide on activated carbon were impregnated and tested at temperatures between 550 and 800 °C for the sulfur dioxide reduction reaction with methane. The catalyst containing 15 % nickel showed the highest performance, achieving over 99 % conversion of SO₂ and over 99.5 % selectivity for the desired sulfur product. A comparative analysis was conducted between nickel oxide catalysts supported by activated carbon and alumina. The alumina-supported nickel catalyst demonstrated promising effectiveness in a lifetime test for industrial applications. The impact of activated carbon structure degradation on the performance of catalysts was also evaluated. It was found that as activated carbon structures degrade over time, the formation of new pores enhances carbon availability, thereby increasing the occurrence of undesirable side reactions. These results highlight how important catalyst support materials are in ensuring long-term stability and performance in sulfur dioxide reduction processes.

研究了以甲烷（CH4）为还原剂催化脱除二氧化硫（so2）的效果，重点研究了活性炭负载镍催化剂。将不同组成的氧化镍浸渍在活性炭上，并在550 ~ 800℃的温度下与甲烷进行二氧化硫还原反应。含镍15%的催化剂表现出最高的性能，so2转化率达到99%以上，硫产物选择性达到99.5%以上。对活性炭负载的氧化镍催化剂和氧化铝负载的氧化镍催化剂进行了对比分析。氧化铝负载镍催化剂在工业应用寿命测试中表现出良好的有效性。考察了活性炭结构降解对催化剂性能的影响。研究发现，随着时间的推移，活性炭结构的降解，新孔隙的形成提高了碳的可用性，从而增加了不良副反应的发生。这些结果突出了催化剂支撑材料在确保二氧化硫还原过程的长期稳定性和性能方面的重要性。

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引用次数: 0