Carbon Trends最新文献_第6页

Technological characterisation of an innovative, shaped carbon from bagasse by comparison to two commercially available carbons 通过与两种商用碳的比较，从甘蔗渣中提取一种创新的定型碳的技术特征

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-24 DOI: 10.1016/j.cartre.2025.100567

Katrin Markuske , Katja Schaldach , Thomas Storch , Kabriil Khajryan , Volker Herdegen , Tobias Michael Fieback

Developing adsorbents from renewable raw materials offers a sustainable alternative to reduce reliance on fossil resources for fluid stream purification in packed beds. This study focuses on a pelletised shaped carbon adsorbent derived from bagasse, an agricultural by-product of sugar production, as a promising raw material with high ecological and value-enhancing potential. Comprehensive physico-mechanical and adsorption-specific characterisations (e.g., specific surface area, pore size distribution, pore volume) were conducted. With regard to specific areas of application, the adsorption behaviour of the shaped carbon from bagasse for CO₂, N₂, and CH₄ at 293 K, as well as its cycle stability under pressure variations (0.1/3.0 MPa), were determined gravimetrically and compared to two commercial activated carbons (Norit® ROW and HOK® Activated Lignite). In addition, industrial performance is indicated using breakthrough behaviour and evaluating the suitability for aqueous separation applications by iodine and methylene blue number.

The shaped carbon from bagasse demonstrated promising properties, including a ball pan hardness of ∼ 99 % and a specific surface area of ∼ 390 m²/g. This study highlights the potential of bagasse-derived shaped carbon as a sustainable and efficient adsorbent. The findings provide a comprehensive classification of the material, enabling its targeted selection for gaseous and aqueous separation tasks based on material properties.

利用可再生原料开发吸附剂，为减少对充填床流体净化对化石资源的依赖提供了一种可持续的选择。甘蔗渣是一种具有高生态和增值潜力的有前途的原料，从甘蔗渣中提取颗粒状碳吸附剂是本研究的重点。进行了全面的物理力学和吸附特性（如比表面积、孔径分布、孔体积）。在特定的应用领域，用重量法测定了蔗渣成型碳在293 K下对CO₂、N₂和CH₄的吸附行为，以及其在压力变化（0.1/3.0 MPa）下的循环稳定性，并与两种商用活性炭（Norit®ROW和HOK®activated Lignite）进行了比较。此外，利用突破行为和评价碘和亚甲基蓝数在水分离应用中的适用性表明了工业性能。从甘蔗渣中提取的成型碳表现出了良好的性能，包括球盘硬度为~ 99%，比表面积为~ 390 m²/g。这项研究强调了甘蔗渣衍生的形状碳作为一种可持续和有效的吸附剂的潜力。研究结果提供了材料的全面分类，使其能够根据材料特性有针对性地选择气体和水分离任务。

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引用次数: 0

The multidiverse graphene oxide: How the fine structure affects structural analysis and performance in reverse osmosis membranes 多元氧化石墨烯：精细结构如何影响反渗透膜的结构分析和性能

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-20 DOI: 10.1016/j.cartre.2025.100565

Christian E. Halbig , Rahul Zambare , Bristy Mukherjee , Slaven Garaj

For a comparative study, we obtained 27 different commercially available graphene oxide samples (GOs) from around the world and applied a wide range of destructive and non-destructive analytical techniques commonly used for structural analysis of graphene-based materials. Surprisingly, we found that a correlation of the recorded data did not follow significantly strong trends. This suggests that the fine structure and stereochemistry of individual GO samples, together with other macroscopic material parameters, are mainly responsible for the lack of comparability of the data obtained. Ultimately, these factors have a huge impact on the thermal degradation processes and also on the performance of GO in its subsequent application, as exemplified here for ion-water separation by reverse osmosis using GO-based membranes. This shows once again that graphene oxide is not the name of a single and well-defined nanomaterial, but rather the general term for a class of heterogeneous graphene-based materials with abundant oxo-functional groups and a wide range of physicochemical properties. The results presented should help researchers around the world to be aware of the vast differences behind the term GO and its associated properties.

为了进行比较研究，我们从世界各地获得了27种不同的市售氧化石墨烯样品（go），并应用了广泛的用于石墨烯基材料结构分析的破坏性和非破坏性分析技术。令人惊讶的是，我们发现记录数据的相关性并没有遵循明显的强烈趋势。这表明单个氧化石墨烯样品的精细结构和立体化学以及其他宏观材料参数是导致所获得数据缺乏可比性的主要原因。最终，这些因素会对氧化石墨烯的热降解过程产生巨大影响，也会对氧化石墨烯在后续应用中的性能产生巨大影响，如本文中使用氧化石墨烯基膜进行反渗透分离离子水的例子。这再次表明，氧化石墨烯不是一种单一的、定义明确的纳米材料的名称，而是一类具有丰富的氧官能团和广泛的物理化学性质的非均相石墨烯基材料的总称。提出的结果应该有助于世界各地的研究人员意识到GO一词及其相关属性背后的巨大差异。

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引用次数: 0

Synthesis, morphology, and structural properties of graphene oxide (GO) and its composites with transition metal phosphates for application in water purification: A review 氧化石墨烯及其与过渡金属磷酸盐复合材料在水净化领域的合成、形态和结构研究进展

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-20 DOI: 10.1016/j.cartre.2025.100566

Lebohang Seromo , Nagi Greesh , Julia Puseletso Mofokeng

Graphene oxide (GO)-based nanocomposites have numerous applications in today's life, with water purification being the leading one. The recently studied GO-based nanocomposites include transition metal phosphates (TMPs) (zirconium phosphate (ZrP), cobalt phosphate (CoP), silver phosphate (AgP), nickel phosphate (NiP), and titanium phosphate (TiP). The modification of GO with transition metal phosphates increases its number of oxygen-containing functional groups, as compared to other GO-based nanocomposites. The TMPs improve the heavy metals adsorption efficiency of GO. Moreover, they generally improve its thermal stability and ion exchange properties, making it ideal for a large spectrum of applications. For water treatment applications, it is crucial to understand the structural and morphological properties of the prepared nanocomposites before studying their effectiveness in purifying water. Thereafter, it is necessary to table out the appropriate method and the relevant tests required to study the effectiveness of the prepared nanocomposite. The effect of pH, interactions between adsorbent and adsorbate, and contact time are some of the important parameters during the adsorption tests of toxic heavy metals. The most toxic heavy metals include mercury (Hg), lead (Pb), cadmium (Cd), and arsenic (As). This study is intended to review the GO, transition metal phosphates, and GO-based nanocomposite's morphology and structural properties, as well as their potential use as toxic heavy metal adsorbents in water.

氧化石墨烯（GO）基纳米复合材料在当今生活中有着广泛的应用，其中水净化是最主要的应用。最近研究的氧化石墨烯基纳米复合材料包括过渡金属磷酸盐（TMPs）（磷酸锆（ZrP）、磷酸钴（CoP）、磷酸银（AgP）、磷酸镍（NiP）和磷酸钛（TiP））。与其他氧化石墨烯基纳米复合材料相比，用过渡金属磷酸盐修饰氧化石墨烯增加了其含氧官能团的数量。TMPs提高了氧化石墨烯对重金属的吸附效率。此外，它们通常改善其热稳定性和离子交换性能，使其成为广泛应用的理想选择。对于水处理应用，在研究纳米复合材料的净水效果之前，了解其结构和形态特性是至关重要的。因此，有必要列出合适的方法和相关的测试来研究所制备的纳米复合材料的有效性。在有毒重金属吸附试验中，pH、吸附剂与吸附物之间的相互作用以及接触时间是影响吸附效果的重要参数。毒性最大的重金属包括汞（Hg）、铅（Pb）、镉（Cd）和砷（As）。本研究旨在综述氧化石墨烯、过渡金属磷酸盐和氧化石墨烯基纳米复合材料的形态和结构特性，以及它们作为水中有毒重金属吸附剂的潜在用途。

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引用次数: 0

Adsorption of CO, CO2 and NO2 onto nanographenes (NGs), anchored systems as NG−(ZnO)n n = 1-6: An ab initio molecular dynamics calculations 纳米石墨烯（NG - (ZnO)n n = 1-6）锚定体系对CO、CO2和NO2的吸附：从头开始分子动力学计算

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-19 DOI: 10.1016/j.cartre.2025.100564

A. C. Piñón Reyes , M. Salazar Villanueva

To assess the chemical interaction between different gases and functionalized semiconductor clusters, DFT (Density functional theory) simulations were performed.

For this work the primary objective is to understand the behavior of nanographenes NGs →C (carbon atoms) functionalized with a cluster of zinc oxide (ZnO)_n of different sizes n = 1-6, to understand the effects of smallest clusters, hence it is important to stablish the adsorption tendency at first stages. This first step is the basis for evaluating the chemical interaction between CO, CO₂, and NO₂ with functionalized semiconductor clusters. The objective is to study changes in adsorption trends, considering different gases and clusters sizes.

The adsorption energy values for C-(ZnO)₂-CO, C-ZnO-CO₂ and C-ZnO-NO₂ are -0.195 eV, -0.543 eV and -3.042 eV respectively, which is related to the results of lower average length distance A.B.L. obtained between the atoms of the species studied (distance of Zn atom to CO, CO₂ and NO₂). Due to the active sites, there is presence of a chemisorption in C-ZnO-NO₂ system, but in C-(ZnO)₂-CO and C-ZnO-CO₂ present physisorption. The electron gap values do not vary significantly for n = 3-6 and the HOMO-LUMO isosurfaces are depicted for all systems. The electron transfer at the adsorption sites is directed from the chemical species toward the CO, CO₂, and NO₂ in all the systems analyzed. Based on these findings, C-(ZnO)₂-CO, C-ZnO-CO₂ and C-(ZnO)₁-NO₂ systems are potential options for CO, CO₂, and NO₂ gas storage, respectively. In addition, an analysis has been carried out on the behavior of larger GNs systems. These results may be useful to researchers in the potential design of a gas storage device for energy applications that are environmentally friendly.

为了评估不同气体和功能化半导体团簇之间的化学相互作用，进行了密度泛函理论（DFT）模拟。对于这项工作，主要目的是了解纳米石墨烯NGs→C（碳原子）与不同尺寸的氧化锌（ZnO）簇n （n = 1-6）功能化的行为，了解最小簇n的影响，因此在第一阶段建立吸附趋势是很重要的。这第一步是评估CO， CO2和NO2与功能化半导体团簇之间化学相互作用的基础。目的是研究吸附趋势的变化，考虑到不同的气体和簇大小。C-(ZnO)2-CO、C-ZnO-CO2和C-ZnO-NO2的吸附能分别为-0.195 eV、-0.543 eV和-3.042 eV，这与所研究物质原子间（Zn原子与CO、CO2和NO2的距离）的平均长度距离A.B.L.较低有关。由于活性位点的存在，C-ZnO- no2体系存在化学吸附，而C-(ZnO)2-CO和C-ZnO- co2体系存在物理吸附。当n = 3-6时，电子间隙值变化不显著，并且所有体系都具有HOMO-LUMO等面。在所有分析的系统中，吸附位点的电子转移都是从化学物质向CO、CO2和NO2转移的。基于这些发现，C-(ZnO)2-CO、C-ZnO-CO2和C-(ZnO)1-NO2体系分别是CO、CO2和NO2气体储存的潜在选择。此外，还对大型GNs系统的行为进行了分析。这些结果可能有助于研究人员设计一种环境友好型能源应用的气体储存装置。

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引用次数: 0

All-in-one inks for one-step printing of solid-state graphene micro-supercapacitors on cellulose substrates 用于纤维素基板上固态石墨烯微型超级电容器一步印刷的一体化油墨

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-13 DOI: 10.1016/j.cartre.2025.100562

Jian Du , Xiaoqian Zhong , Woo Jin Hyun

Printable graphene inks, widely developed for micro-supercapacitors (MSCs), facilitate the fabrication of microscale graphene electrodes with complex interdigitated structures. However, dense graphene flake packing in printed electrodes hinders electrolyte penetration, reducing the electrode/electrolyte interface for the electric double layer and thereby limiting the capacitance. Here, all-in-one inks are introduced to print electrodes and electrolytes simultaneously for graphene MSCs. The inks are prepared based on graphene flakes coated with polypropylene carbonate (PPC) and an ionic liquid (IL). Printing these inks through an appropriately designed stencil on cellulose substrates forms interdigitated graphene electrodes along with solid-state PPC/IL layers that enable ion transport between the electrodes. Furthermore, the IL deposited with graphene flakes in the printed electrodes enhances the electrode/electrolyte interface, promoting the formation of the electric double layer. The resulting graphene MSCs exhibit exceptional areal capacitance, exceeding 4 mF cm⁻². This one-step printing method also allows the fabrication of graphene MSCs in parallel or series connections, which extends operating time or voltage, offering a streamlined and scalable approach for the production of high-performance solid-state graphene MSCs.

可印刷石墨烯油墨广泛应用于微型超级电容器（MSCs）中，有助于制造具有复杂交叉结构的微型石墨烯电极。然而，印刷电极中致密的石墨烯片状填料阻碍了电解质的渗透，减少了双电层的电极/电解质界面，从而限制了电容。在这里，一体化墨水被引入到石墨烯间充质干细胞同时打印电极和电解质。这种油墨是基于涂有碳酸聚丙烯（PPC）和离子液体（IL）的石墨烯薄片制备的。通过适当设计的模板在纤维素基板上印刷这些油墨，形成交叉的石墨烯电极以及固态PPC/IL层，使离子能够在电极之间传输。此外，在印刷电极中沉积石墨烯片的IL增强了电极/电解质界面，促进了双电层的形成。所得的石墨烯间质干细胞表现出特殊的面电容，超过4 mF cm⁻²。这种一步印刷方法还允许在并联或串联连接中制造石墨烯MSCs，从而延长工作时间或电压，为生产高性能固态石墨烯MSCs提供了一种简化和可扩展的方法。

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引用次数: 0

The impact of thermal stabilization temperature and duration on the pore structure of polyacrylonitrile-based carbon nanofibers 热稳定温度和持续时间对聚丙烯腈基纳米碳纤维孔结构的影响

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-08 DOI: 10.1016/j.cartre.2025.100559

T. Fischer , M. Pagel , A. Kretzschmar , V. Selmert , S. Jovanovic , R. Rameker , H. Kungl , H. Tempel , R.-A. Eichel

This work analyzes the impact of temperature and duration during thermal stabilization of polyacrylonitrile-based (PAN-based) nanofibers on the pore formation of carbon nanofibers. Two sample series at different stabilization durations (0–15 h) and temperatures (200–300 °C) were synthesized and characterized by Fourier-transform infrared spectroscopy, Raman spectroscopy, elemental analysis, solid state nuclear magnetic resonance and gas adsorption. A significant increase of the pore volume of the carbonized nanofibers from 0.039 cm³ g⁻¹ to 0.171 cm³ g⁻¹ was obtained for long stabilization durations (> 4 h). Similar increases up to 0.166 cm³ g⁻¹ were obtained at high stabilization temperatures (> 250 °C). This increased pore formation was assigned to the growth of larger stabilized ladder polymers and a high incorporation of oxygen during the thermal stabilization at these conditions. Both alter the structure of the final carbon nanofibers and strongly affect the formation of pore volume during carbonization. Especially, the formation of the ultramicropore volume was found to be highly dependent on these parameters. The results show the necessity of a careful consideration of the thermal stabilization conditions for tailoring of the pore structure of PAN-based carbon nanofibers.

本文分析了聚丙烯腈基（pan）纳米纤维热稳定过程中的温度和持续时间对碳纳米纤维孔隙形成的影响。合成了两个稳定时间（0-15 h）和温度（200-300℃）不同的样品系列，并通过傅里叶变换红外光谱、拉曼光谱、元素分析、固态核磁共振和气体吸附对其进行了表征。在长稳定时间（> 4 h）下，碳化纳米纤维的孔体积从0.039 cm³g−1显著增加到0.171 cm³g−1。在高稳定温度（> 250°C）下，获得了高达0.166 cm³g−1的类似增加。这种增加的孔隙形成归因于在这些条件下热稳定过程中更大的稳定阶梯聚合物的生长和高氧的掺入。两者都改变了最终碳纳米纤维的结构，并强烈影响炭化过程中孔隙体积的形成。特别是，发现超微孔体积的形成高度依赖于这些参数。结果表明，在设计聚丙烯腈基碳纳米纤维的孔结构时，需要仔细考虑热稳定条件。

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引用次数: 0

Synthesis of S-doped mesoporous carbon and its use in advanced supercapacitors and sodium-ion batteries s掺杂介孔碳的合成及其在先进超级电容器和钠离子电池中的应用

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-08 DOI: 10.1016/j.cartre.2025.100558

Zha-Xi Wan-Me, Hai-Tao Zhang, Yang Zhao, Hui-Zhan Wen, Xue-Ying Wan, Yu-Long Xie

Rational design of mesoporous carbon materials with controllable pore structures and higher specific surface areas has always been a daunting challenge in advanced energy materials. Here, we propose a simple hydrothermal synthesis strategy for the preparation of sulfur-doped mesoporous carbon (SMC), which exhibits hierarchical porosity and a significantly increased specific surface area (650.22 m² g^-1). This structure is constructed through the molecular assembly of phenolic resin precursors with bifunctional sodium sulfate (simultaneously achieving sulfur doping and pore modulation), mediated by Pluronic F127 triblock copolymer as a mesostructure directing agent. System characterization indicates that the optimized SMC-0.1 material possesses excellent electrochemical properties: (1) as a supercapacitor electrode, it provides an outstanding specific capacitance of 188.9 F g^-1 at 0.5 A g^-1; (2) the fabricated symmetrical device (SMC-0.1//SMC-0.1) achieves an energy density of 5.12 Wh kg^-1 at a power density of 150.07 W kg^-1 in a 6 M KOH electrolyte; (3) when used as a sodium-ion battery anode, SMC-0.1 exhibits excellent rate capability and improved Na⁺ diffusion kinetics. This study proposes a general heteroatom doping method to design multifunctional carbon structures with broad applicability in advanced energy systems.

合理设计具有可控孔隙结构和较高比表面积的介孔碳材料一直是先进能源材料领域的一大难题。在这里，我们提出了一种简单的水热合成策略来制备硫掺杂介孔碳（SMC），该策略具有分层孔隙度和显着增加的比表面积（650.22 m2 g-1）。该结构是通过酚醛树脂前体与双功能硫酸钠的分子组装（同时实现硫掺杂和孔调制），由Pluronic F127三嵌段共聚物作为介观结构导向剂介导而构建的。系统表征表明，优化后的SMC-0.1材料具有优异的电化学性能：(1)作为超级电容器电极，在0.5 a g-1下具有188.9 F -1的优异比电容；(2)所制备的对称器件（SMC-0.1//SMC-0.1）在6 M KOH电解液中，以150.07 W kg-1的功率密度实现了5.12 Wh kg-1的能量密度；(3) SMC-0.1作为钠离子电池负极时，表现出优异的倍率性能和改善的Na+扩散动力学。本研究提出了一种通用的杂原子掺杂方法来设计在先进能源系统中具有广泛适用性的多功能碳结构。

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引用次数: 0

Low-temperature active site formation for oxygen reduction reaction in (Fe, N)-doped carbon black via rapid thermal annealing （Fe， N）掺杂炭黑快速热退火氧还原反应的低温活性位形成

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-07 DOI: 10.1016/j.cartre.2025.100556

Guanyu Wang, Lijie Zhang, Atsunori Ikezawa, Hajime Arai, Keiko Waki

Nitrogen- and iron- doped carbon-based materials are promising oxygen reduction reaction (ORR) catalysts that can replace precious platinum-based catalysts. Among carbon-based materials, carbon black (CB) is attractive owing to its high surface areas, high wettability and high intrinsic electrical conductivity, and it has been reported that high annealing temperatures such as 900 °C is required to introduce FeNx active sites to CBs. In this study, we used defective acid-treated CBs that are suitable for FeNx accommodation, and employed direct nitrogen doping of iron-added defective CBs by rapid thermal annealing in ammonia. As a result, it was shown that the FeN_x active sites can be formed at a low temperature of 500 °C. We then comparatively explored the relationship between the annealing temperatures (500 °C, 700 °C and 900 °C) and the characteristics of the products including the ORR activity, and found that the highest ORR activity is obtained with a sample annealed at 700 °C. The Raman spectroscopy, transmission electron microscopy and X-ray absorption spectroscopy indicate that the FeN_x species transform into FeN₄ configurations in the edge with the optimized defect levels at 700 °C, resulting in high ORR activity. Further increasing the temperature to 900 °C leads to the evolution of FeNx species into FeN₂ configurations along with increased Fe nanoparticle aggregation, which diminishes catalytic performance.

氮掺杂和铁掺杂碳基材料是很有前途的氧还原反应（ORR）催化剂，可以取代贵重的铂基催化剂。在碳基材料中，炭黑（CB）因其高表面积，高润湿性和高本征电导率而具有吸引力，并且有报道称需要900℃的高温退火才能将FeNx活性位点引入到CB中。在本研究中，我们使用了适合于FeNx调节的缺陷酸处理CBs，并通过在氨中快速热退火的方法将添加铁的缺陷CBs直接氮掺杂。结果表明，在500℃低温下可以形成FeNx活性位。然后，我们比较探讨了退火温度（500°C， 700°C和900°C）与产品特性（包括ORR活性）之间的关系，发现在700°C退火的样品获得了最高的ORR活性。拉曼光谱、透射电镜和x射线吸收光谱分析表明，在700℃时，FeNx在缺陷水平优化的边缘转变为FeN4构型，导致ORR活性较高。当温度进一步升高到900℃时，随着Fe纳米粒子聚集的增加，fex向fe2结构演化，从而降低了催化性能。

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引用次数: 0

Electrochemical preparation of exfoliated graphite composites from a ferric chloride-graphite intercalation compound 氯化铁-石墨插层化合物制备剥离石墨复合材料的电化学研究

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-07 DOI: 10.1016/j.cartre.2025.100560

Keita Niitani , Masayuki Morita , Takeshi Abe

Exfoliated graphite-based composites have attracted attention across various fields, such as fuel cells and sensors. Herein, we present a facile method to prepare exfoliated graphite composites containing metal compounds. A FeCl₃-graphite intercalation compound is first synthesized from raw graphite powder and then exfoliated by electrochemical reduction in aqueous KOH solutions. Structural analysis reveals that the exfoliated graphite comprises carbon layers that encapsulate KCl and Fe particles. Furthermore, we discuss the reaction mechanism based on the relation between the KOH concentration and the electrochemical potential.

剥离石墨基复合材料已经引起了燃料电池和传感器等各个领域的关注。本文提出了一种制备含金属化合物的剥离石墨复合材料的简便方法。以石墨粉为原料合成了fecl3 -石墨插层化合物，并在KOH水溶液中进行电化学还原剥离。结构分析表明，剥落石墨由包裹KCl和Fe颗粒的碳层组成。根据KOH浓度与电化学电位的关系，讨论了反应机理。

引用次数: 0

Synthesis of activated carbon from Balanites aegyptiaca and hyphaene thebaica shells by physical activation 以埃及巴兰和白炭黑壳为原料物理活化合成活性炭

IF 3.9 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2025-08-06 DOI: 10.1016/j.cartre.2025.100555

Maâzou Siragi D B , Ibrahim Natatou , Vincent Dubois

Activated carbon is a porous material that has several applications, including in the fields of adsorption and catalysis. This material can be obtained from any lignocellulosic biomass. The aim of this work is to synthesize activated carbon (AC) from Balanites aegyptiaca (BA) and Hyphaene thebaica (HT) shells. The material is obtained after physical activation under nitrogen or carbon dioxide flow. The characterization of the material has been carried out using a variety of analytical methods, including nitrogen adsorption at 77 K to determine its porosity and specific surface area, the iodine index and methylene blue index tests. Surface functions, pH to point of zero charge measurement to determine its acidity, and X-ray diffraction to examine its structural properties. The most optimal values for specific surface area and porous volume are 939 m²/g and 0.572 cm³/g, respectively, for Balanites aegyptiaca. For Hyphaene thebaica, they are 1329 m²/g and 0.589 cm³/g. It is noteworthy that 62 % of the samples have mean pore diameters higher than 20 Å. The results of the iodine and methylene blue index tests show that the samples have a satisfactory adsorption capacity within the aqueous phase. The surface functions of the activated carbons prepared are basic, with pH values ranging from 10.2 to 10.8 at the point of zero charge. The structure of these materials is amorphous, with fine graphitic zones.

活性炭是一种多孔材料，具有多种用途，包括吸附和催化领域。这种材料可以从任何木质纤维素生物质中获得。以埃及巴兰（Balanites aegyptiaca， BA）和海丝贝（Hyphaene thebaica， HT）壳为原料合成活性炭（AC）。物料在氮气或二氧化碳流下经物理活化而得。使用多种分析方法对材料进行了表征，包括在77 K下氮气吸附测定其孔隙率和比表面积，碘指数和亚甲基蓝指数测试。表面功能，pH值到零电荷点测量确定其酸度，x射线衍射检查其结构性质。埃及Balanites的最优比表面积和孔隙体积分别为939 m²/g和0.572 cm³/g。对于连苯，它们分别是1329 m²/g和0.589 cm³/g。值得注意的是，62%的样品的平均孔径大于20 Å。碘和亚甲基蓝指数测试结果表明，样品在水相内具有满意的吸附能力。所制备的活性炭表面功能为碱性，在零电荷点的pH值为10.2 ~ 10.8。这些材料的结构是无定形的，具有精细的石墨带。

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引用次数: 0