New Carbon Materials最新文献_第10页

Influence of functionalized graphene on the bacterial and fungal diversity of Vicia faba rhizosphere soil 功能化石墨烯对蚕豆根际土壤细菌和真菌多样性的影响

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60890-5

Zhi-wen Chen , Jing Ren , Jun Qiao , Jian-guo Zhao , Jing-wei Li , Ze-hui Liu , Wei-jia Li , Bao-yan Xing , Jin Zhang , Hui Nie

The effect of functionalized graphene on the growth and development of Vicia faba L. was investigated by analyzing its impact on the composition and diversity of the microbial community in rhizosphere peat soil. Seedlings of V. faba planted in this peat soil were treated with either distilled water (CK) or 25 mg·L⁻¹ (G25) of functionalized graphene solution. Results showed that the height and root length of V. faba seedlings in the G25 group were significantly larger than those in CK group. The microbial community was analyzed by amplifying and sequencing the 16S rRNA gene V3–V4 region of bacteria and internal transcribed spacer region of fungi in rhizosphere soil using Illumina MiSeq technology. Alpha and beta diversity analysis indicated that functionalized graphene increased the richness and diversity of bacteria and fungi in the V. faba rhizosphere peat soil. The abundances of three nitrogen cycling-related bacteria, Hydrogenophaga, Sphingomonas and Nitrosomonadaceae, were also altered after treatment with the functionalized graphene. The relative abundance of Basilicum, related to soil phosphorus solubilization, decreased in the fungal community, while the relative abundance of Clonostachys and Dimorphospora, which exhibited strong biological control over numerous fungal plant pathogens, nematodes and insects, increased in the soil after functionalized graphene treatment. Redundancy analysis revealed that the potential of hydrogen (pH), organic matter, and total phosphorus contributed the most to the changes in bacterial and fungal community composition in the rhizosphere soil. Overall, our findings suggested that the addition of functionalized graphene altered the relative abundances of nitrogen and phosphorus cycling-related microorganisms in peat soil, promoting changes in the physicochemical properties of the soil and ultimately leading to the improved growth of V. faba plants.

通过分析功能化石墨烯对根际泥炭土壤微生物群落组成和多样性的影响，探讨功能化石墨烯对蚕豆生长发育的影响。用蒸馏水（CK）或25 mg·L−1 （G25）的功能化石墨烯溶液对种植在泥炭土中的蚕豆幼苗进行处理。结果表明，G25处理蚕豆幼苗的高度和根长均显著大于CK处理。利用Illumina MiSeq技术对根际土壤中细菌16S rRNA基因V3-V4区和真菌内部转录间隔区进行扩增和测序，分析微生物群落。α和β多样性分析表明，功能化石墨烯增加了蚕豆根际泥炭土壤中细菌和真菌的丰富度和多样性。经功能化石墨烯处理后，三种与氮循环相关的细菌（Hydrogenophaga、Sphingomonas和Nitrosomonadaceae）的丰度也发生了变化。功能化石墨烯处理后，与土壤磷增溶作用有关的Basilicum在真菌群落中的相对丰度下降，而对多种真菌植物病原体、线虫和昆虫具有较强生物控制作用的Clonostachys和Dimorphospora在土壤中的相对丰度增加。冗余分析表明，氢电位、有机质电位和全磷电位对根际土壤细菌和真菌群落组成的影响最大。总体而言，我们的研究结果表明，添加功能化石墨烯改变了泥炭土中氮和磷循环相关微生物的相对丰度，促进了土壤理化性质的变化，最终导致蚕豆植株的生长改善。

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引用次数: 0

N/S co-doped carbon nanosheets for the efficient electrochemical extraction of uranium from seawater 氮/硫共掺杂碳纳米片电化学高效萃取海水中铀

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60885-1

Tan Yi , Jun-long Huang , Zong-heng Cen , Yi-wei Ji , Shao-hong Liu

Carbon-based catalysts are promising materials for the electrochemical extraction of uranium from seawater. However, their practical application is often limited by high cost and low catalytic activity. Using low-cost polystyrene sulfonic acid resin and melamine as raw materials, a class of nitrogen and sulfur co-doped carbon nanosheets (CNSs) with high catalytic activity has been developed by a low-temperature hydrothermal treatment and high-temperature carbonization. Because of their high conductivity and high catalytic activity, CNS-based electrodes can catalyze uranyl ions in seawater into easily recoverable Na₂O(UO₃·H₂O)_x precipitates at −2 V, and achieve an extraction capacity of up to 3 923.7 mg g⁻¹ with a uranium removal of 98.1% in uranium-spiked seawater (1×10³ mg L⁻¹). In situ Raman spectroscopy showed that a large number of uranium compounds appeared on the surface of the composite electrode within 40 min of extraction. The electrode also recovered 72.7% of the uranium in natural seawater, demonstrating excellent prospects for this application. This work provides a new approach into the design of low-cost, metal-free electrocatalysts for the efficient uranium extraction from natural seawater.

碳基催化剂是电化学提取海水中铀的重要材料。然而，它们的实际应用往往受到高成本和低催化活性的限制。以低成本聚苯乙烯磺酸树脂和三聚氰胺为原料，通过低温水热处理和高温碳化制备了一类具有高催化活性的氮硫共掺杂碳纳米片（CNSs）。cns基电极具有高导电性和高催化活性，可将海水中的铀酰离子催化成易于回收的Na2O(UO3·H2O)x沉淀，在含铀海水（1×103 mg L−1）中萃取量高达3 923.7 mg g−1，铀去除率高达98.1%。原位拉曼光谱分析表明，在萃取40 min内，复合电极表面出现了大量的铀化合物。该电极在天然海水中的铀回收率为72.7%，具有良好的应用前景。这项工作为设计低成本、无金属的电催化剂从自然海水中高效提取铀提供了一条新途径。

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引用次数: 0

Electrochemical performance of a symmetric supercapacitor device designed using laser-produced multilayer graphene 利用激光制备的多层石墨烯设计的对称超级电容器器件的电化学性能

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60891-7

Gargi Dhiman , Kavita Kumari , Bon-Heun Koo , Faheem Ahmed , Nagih M. Shaalan , Saurabh Dalela , Parvez A. Alvi , Ranjeet Kumar Brajpuriya , Shalendra Kumar

We report an economical approach for the fabrication of laser-produced graphene (LPG) electrodes, which results in an improved electrochemical performance. Polyimide polymer was used as the starting material for LPG synthesis and was irradiated under ambient conditions with a CO₂ laser. The prepared LPG samples were characterized by Raman spectroscopy and FTIR, which validated the formation of multilayer graphene containing sp² hybridized C＝C bonds. FE-SEM revealed three-dimensional (3D) sheet-like structures, while HR-TEM images showed lattice planes with an interplanar spacing of approximately 0.33 nm, corresponding to the (002) plane of graphene. Their electrochemical performance showed a remarkable areal specific capacitance (C_A) of 51 mF cm⁻² (170 F g⁻¹) at 1 mA cm⁻² (3.3 A g⁻¹) in a three-electrode configuration with 1 mol L⁻¹ KOH as the aqueous electrolyte. The LPG electrodes produced an energy density of ~3.5 µWh cm⁻² and a power density of ~350 µW cm⁻², demonstrating significant energy storage ability. They also had an excellent cycling stability, retaining 87% of their specific capacitance after 3 000 cycles at 1 mA/cm². A symmetric supercapacitor fabricated with LPG electrodes and the 1 mol L⁻¹ KOH electrolyte had a specific capacitance of 23 mF cm⁻² and showed excellent retention after 10 000 cycles, showing LPG's potential for use in supercapacitors.

我们报告了一种经济的方法来制造激光生产石墨烯（LPG）电极，这导致了电化学性能的提高。以聚酰亚胺聚合物为原料合成液化石油气，在常温条件下用CO2激光照射。利用拉曼光谱和红外光谱对制备的LPG样品进行了表征，证实了含有sp2杂化C=C键的多层石墨烯的形成。FE-SEM显示三维（3D）片状结构，而HR-TEM图像显示晶格面，其面间距约为0.33 nm，对应于石墨烯的（002）平面。在1 mol L−1 KOH作为水电解质的三电极结构下，在1 mA cm−2 （3.3 a g−1）下，它们的面积比电容（CA）达到51 mF cm−2 （170 F g−1）。LPG电极产生的能量密度为~3.5µWh cm−2，功率密度为~350µW cm−2，具有显著的储能能力。它们还具有出色的循环稳定性，在1 mA/cm2下循环3000次后保持87%的比电容。用液化气电极和1 mol L−1 KOH电解液制备的对称超级电容器的比电容为23 mF cm−2，循环10000次后保持良好，显示了液化气在超级电容器中的应用潜力。

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引用次数: 0

A carbon material doped with both porous FeOx and N as an efficient catalyst for oxygen reduction reactions 掺杂多孔FeOx和N的碳材料，作为氧还原反应的有效催化剂

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60876-0

Jian Gao , Xin-yao Wang , Ling-xin Meng , Zhen Yin , Na Ma , Xiao-yao Tan , Peng Zhang

To replace precious metal oxygen reduction reaction (ORR) electrocatalysts, many transition metals and N-doped carbon composites have been proposed in the last decade resulting in their rapid development as promising non-precious metal catalysts. We used Ketjenblack carbon as the precursor and mixed it with a polymeric ionic liquid (PIL) of [Hvim]NO₃ and Fe(NO₃)₃, which was thermally calcined at 900 °C to produce a porous FeO_x, N co-doped carbon material denoted FeO_x-N/C. Because the PIL of [Hvim]NO₃ strongly combines with and disperses Fe³⁺ ions, and NO³⁻ is thermally pyrolyzed to form the porous structure, the FeO_x-N/C catalyst has a high electrocatalytic activity for the ORR in both 0.1 mol L⁻¹ KOH and 0.5 mol L⁻¹ H₂SO₄ electrolytes. It was used as the catalyst to assemble a zinc-air battery, which had a peak power density of 185 mW·cm⁻². Its superior electrocatalytic activity, wide pH range, and easy preparation make FeO_x-N/C a promising electrocatalyst for fuel cells and metal-air batteries.

为了取代贵金属氧还原反应（ORR）电催化剂，近十年来人们提出了许多过渡金属和n掺杂碳复合材料，使其作为有前景的非贵金属催化剂迅速发展。以Ketjenblack炭为前驱体，与[Hvim]NO3和Fe(NO3)3的聚合离子液体（PIL）混合，在900℃下进行热煅烧，制得多孔FeOx， N共掺杂碳材料，标记为FeOx-N/C。FeOx-N/C催化剂在0.1 mol L−1 KOH和0.5 mol L−1 H2SO4电解质中均具有较高的ORR电催化活性，这是因为[Hvim]NO3的PIL与Fe3+离子强结合并分散，而NO3−被热热解形成多孔结构。用它作为催化剂组装锌-空气电池，其峰值功率密度为185 mW·cm−2。FeOx-N/C具有优异的电催化活性、较宽的pH范围和易于制备等优点，是燃料电池和金属空气电池的电催化剂。

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引用次数: 0

Electromagnetic wave absorption performance of Fe3O4/activated carbon-natural resin nanocomposite Fe3O4/活性炭-天然树脂纳米复合材料的电磁波吸收性能

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60888-7

Mahsa Mahmoodi , Bagher Aslibeiki , Reza Peymanfar , Hamid Naghshara , Rajesh Kumar Rajagopal , Yue Zhao , Davide Peddis , Tapati Sarkar

There has recently been a fundamental need to develop high efficiency microwave absorbers to reduce electro-magnetic pollution. It is often very difficult to obtain superior absorption with only one material, so we have explored composites using fillers of activated carbon derived from biological material (oleaster seeds) and resin (apricot tree gum) with Fe₃O₄ in a paraffin wax matrix to improve the dielectric properties and achieve a high specific surface area. A 1 mm thick layer of a Fe₃O₄ + resin (FEOR), with the magnetic nanoparticles anchored to the gum, resulted in a reflection loss of −71.09 dB. We compared this with the results for composites using a filler of Fe₃O₄ + activated carbon, and one with a three-component filler of Fe₃O₄ + activated carbon + resin which had a very porous structure that had a direct effect on the surface polarization. However, the FEOR sample had near-ideal impedance matching, close to 1, which resulted in high absorption performance. In addition, the presence of defects improves microwave attenuation by dipole polarization and charge carrier trapping. This work suggests the use of new types of biomaterials to increase microwave absorption.

开发高效的微波吸收器以减少电磁污染已成为当前的迫切需要。仅使用一种材料通常很难获得优异的吸收性，因此我们探索了使用生物材料（油橄榄种子）和树脂（杏树胶）在石蜡基体中添加Fe3O4的活性炭填料来改善介电性能并实现高比表面积的复合材料。在1 mm厚的Fe3O4 +树脂（FEOR）层上，磁性纳米颗粒固定在树胶上，导致反射损失为- 71.09 dB。我们将这一结果与Fe3O4 +活性炭填料和Fe3O4 +活性炭+树脂三组分填料的复合材料进行了比较，这两种填料具有非常多孔的结构，对表面极化有直接影响。然而，FEOR样品具有接近理想的阻抗匹配，接近1，因此具有很高的吸收性能。此外，缺陷的存在改善了偶极子极化和载流子俘获对微波的衰减。这项工作建议使用新型生物材料来增加微波吸收。

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引用次数: 0

A review of petroleum asphalt-based carbon materials in electrochemical energy storage 石油沥青基碳材料在电化学储能中的研究进展

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60883-8

Shao-xiong Du , Ling-yu Kong , Lu Liu , Zi-yang Cao , Xi Wu , Bo Sun , Zheng-xuan Li , Wang Yang , Yong-feng Li

Petroleum asphalt, an important by-product of the petrochemical industry, has diverse applications but often suffers from low industrial added value. Because of its low cost, high carbon content, and high polycyclic aromatic hydrocarbon content, appropriate modification can increase its value and expand its energy storage applications. Current research progress on the common preparation methods of petroleum asphalt-based carbon materials, including template-assisted pyrolysis, molten salt treatment, activation, heteroatom doping, and pre-oxidation is reviewed, and its use in supercapacitors and alkali metal ion batteries, is also elaborated. Feasible solutions for the current problems with petroleum asphalt are proposed, with the aim of providing insights into its high value-added utilization.

石油沥青是石油化工的重要副产品，用途广泛，但工业附加值低。由于其成本低，碳含量高，多环芳烃含量高，适当的改性可以增加其价值，扩大其储能应用。综述了石油沥青基碳材料的常用制备方法，包括模板辅助热解、熔盐处理、活化、杂原子掺杂、预氧化等的研究进展，并对其在超级电容器和碱金属离子电池中的应用进行了阐述。针对目前石油沥青存在的问题，提出了可行的解决方案，旨在为石油沥青的高附加值利用提供见解。

引用次数: 0

Reduced graphene oxide porous films containing SiC whiskers for constructing multilayer electromagnetic shields 用于构建多层电磁屏蔽的含SiC晶须的还原氧化石墨烯多孔膜

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-12-01 Epub Date: 2024-12-27 DOI: 10.1016/S1872-5805(24)60855-3

Jing Li, Yi-quan Qi, Shi-xiang Zhao, Han-xun Qiu, Jun-he Yang, Guang-zhi Yang

Developing lightweight and flexible thin films for electromagnetic interference (EMI) shielding is of great importance. Porous thin films of reduced graphene oxide containing SiC whiskers (SiC@RGO) for EMI shielding were prepared by a two-step reduction of graphene oxide (GO), in which the two steps were chemical reduction by HI and the solid phase microwave irradiation. A significant increase of the film thickness from around 20 to 200 μm was achieved due to the formation of a porous structure by gases released during the 3 s of solid phase microwave irradiation. The total shielding effectiveness (SE_T) and the reflective SE (SE_R) of the SiC@RGO porous thin films depended on the GO/SiC mass ratio. The highest SE_T achieved was 35.6 dB while the SE_R was only 2.8 dB, when the GO/SiC mass ratio was 4:1. The addition of SiC whiskers was critical for the multi-reflection, interfacial polarization and dielectric attenuation of EM waves. A multilayer film with a gradient change of SE values was constructed using SiC@RGO porous films and multi-walled carbon nanotubes buckypapers. The highest SE_T of the multilayer films reached 75.1 dB with a SE_R of 2.7 dB for a film thickness of about 1.5 mm. These porous SiC@RGO thin films should find use in multilayer or sandwich structures for EMI absorption in packaging or lining.

开发轻量化、柔性的电磁干扰屏蔽薄膜具有重要意义。采用HI化学还原法和固相微波辐照法两步还原氧化石墨烯，制备了含SiC晶须的氧化石墨烯多孔膜（SiC@RGO）。固相微波辐照3 s释放的气体形成了多孔结构，薄膜厚度从20 μm左右增加到200 μm左右。SiC@RGO多孔薄膜的总屏蔽效能（SET）和反射SE （SER）与氧化石墨烯/碳化硅的质量比有关。当GO/SiC质量比为4:1时，最高SET为35.6 dB， SER仅为2.8 dB。SiC晶须的加入对电磁波的多重反射、界面极化和介电衰减至关重要。利用SiC@RGO多孔膜和多壁碳纳米管纸构建了SE值梯度变化的多层膜。当膜厚约为1.5 mm时，多层膜的最高SET为75.1 dB， SER为2.7 dB。这些多孔SiC@RGO薄膜可用于多层或夹层结构，用于封装或衬里的电磁干扰吸收。

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引用次数: 0

The relationship between the high-frequency performance of supercapacitors and the type of doped nitrogen in the carbon electrode 超级电容器的高频性能与碳电极中的掺氮类型之间的关系

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-10-01 Epub Date: 2024-10-25 DOI: 10.1016/S1872-5805(24)60849-8

Ya-feng Fan , Zong-lin Yi , Yi Zhou , Li-jing Xie , Guo-hua Sun , Zhen-bing Wang , Xian-hong Huang , Fang-yuan Su , Cheng-meng Chen

Nitrogen doping has been widely used to improve the performance of carbon electrodes in supercapacitors, particularly in terms of their high-frequency response. However, the charge storage and electrolyte ion response mechanisms of different nitrogen dopants at high frequencies are still unclear. In this study, melamine foam carbons with different configurations of surface-doped N were formed by gradient carbonization, and the effects of the configurations on the high-frequency response behavior of the supercapacitors were analyzed. Using a combination of experiments and first-principle calculations, we found that pyrrolic N, characterized by a higher adsorption energy, increases the charge storage capacity of the electrode at high frequencies. On the other hand, graphitic N, with a lower adsorption energy, increases the speed of ion response. We propose the use of adsorption energy as a practical descriptor for electrode/electrolyte design in high-frequency applications, offering a more universal approach for improving the performance of N-doped carbon materials in supercapacitors

掺氮已被广泛用于提高超级电容器中碳电极的性能，尤其是在高频响应方面。然而，不同氮掺杂物在高频下的电荷存储和电解质离子响应机制仍不清楚。本研究通过梯度碳化法形成了具有不同表面掺氮构型的三聚氰胺泡沫碳，并分析了不同构型对超级电容器高频响应行为的影响。通过实验和第一原理计算相结合的方法，我们发现吡咯烷酮 N 具有较高的吸附能，可提高电极在高频下的电荷存储容量。另一方面，吸附能较低的石墨化 N 可提高离子响应速度。我们建议将吸附能作为高频应用中电极/电解质设计的实用描述指标，为提高超级电容器中掺杂 N 的碳材料的性能提供更通用的方法。

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引用次数: 0

The preparation and properties of N-doped carbon materials and their use for sodium storage 掺氮碳材料的制备、特性及其在钠储存中的应用

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-10-01 Epub Date: 2024-10-25 DOI: 10.1016/S1872-5805(24)60877-2

Ren-lu Yuan, Ruo-yang Hou, Lei Shang, Xue-wei Liu, Ang Li, Xiao-hong Chen, Huai-he Song

Defect engineering by heteroatom doping gives carbon materials some new characteristics such as a different electronic structure and a high electrochemical activity, making them suitable for high-performance applications. N-doping has been widely investigated because of its similar atom radius to carbon, high electronegativity as well as many different configurations. We summarize the preparation methods and properties of N-doped carbon materials, and discuss their possible use in sodium ion storage. The relationships between N content/configuration and crystallinity, electronic conductivity, wettability, chemical reactivity as well as sodium ion storage performance are discussed.

通过掺杂杂原子进行缺陷工程可赋予碳材料一些新特性，如不同的电子结构和高电化学活性，使其适用于高性能应用。由于 N 原子半径与碳相近、电负性高且具有多种不同的构型，因此 N 掺杂已被广泛研究。我们总结了掺 N 碳材料的制备方法和特性，并讨论了它们在钠离子存储中的可能用途。讨论了 N 含量/构型与结晶度、电子导电性、润湿性、化学反应性以及钠离子存储性能之间的关系。

引用次数: 0

Preparation of highly graphitized porous carbon and its ethane/ethylene separation performance 高石墨化多孔碳的制备及其乙烷/乙烯分离性能

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials

Pub Date : 2024-10-01 Epub Date: 2024-10-25 DOI: 10.1016/S1872-5805(24)60859-0

Ru-shuai Liu, Fan Tang, Xiao-dong Shi, Guang-ping Hao, An-hui Lu

The efficient separation of ethane (C₂H₆) and ethylene (C₂H₄) is crucial for the preparation of polymer-grade C₂H₄, necessitating the development of highly selective and stable C₂H₆/C₂H₄ adsorbents. Highly graphitized porous carbon, denoted GC-800, was synthesized by polymerization at room temperature followed by carbonization at 800 °C using phenolic resin as the precursor and FeCl₃ as the iron source. Vienna Ab-initio Simulation Package (VASP) calculations confirmed a higher binding energy between C₂H₆ molecules and graphitized porous carbon surfaces, so that a high degree of graphitization increased the adsorption capacity of porous carbon for C₂H₆. However, catalytic graphitization using Fe at high temperatures disrupted the microporous structure of the carbon, thereby reducing its ability to separate C₂H₆/C₂H₄. By controlling the carbonization temperature, the degree of graphitization and pore structure of the porous carbon could be changed. Raman spectra and XPS spectra showed that the GC-800 had a high degree of graphitization, with a sp² C content as high as 73%. Low-temperature N₂ physical adsorption measurements estimated the specific surface area of GC-800 to be as high as 574 m²·g⁻¹. At 298 K and 1 bar, it had an equilibrium adsorption capacity of 2.16 mmol·g⁻¹ for C₂H₆, with the C₂H₆/C₂H₄ (1:1 and 1:9, v/v) ideal adsorbed solution theory selectivity respectively reaching 2.4 and 3.8, significantly higher than the values of most reported high-performance C₂H₆ selective adsorbents. Dynamic breakthrough experiments showed that GC-800 could produce high-purity C₂H₄ in a single step from a mixture of C₂H₆ and C₂H₄. Dynamic cycling tests confirmed its good cyclic stability, and that it could efficiently separate C₂H₆/C₂H₄ even under humid conditions.

高效分离乙烷（C2H6）和乙烯（C2H4）对于制备聚合物级 C2H4 至关重要，因此需要开发高选择性和高稳定性的 C2H6/C2H4 吸附剂。以酚醛树脂为前驱体，FeCl3 为铁源，在室温下聚合，然后在 800 °C 下碳化，合成了高石墨化多孔碳，命名为 GC-800。维也纳模拟仿真软件包（VASP）的计算证实，C2H6 分子与石墨化多孔碳表面之间的结合能更高，因此高度石墨化提高了多孔碳对 C2H6 的吸附能力。然而，在高温下使用铁进行催化石墨化会破坏碳的微孔结构，从而降低其分离 C2H6/C2H4 的能力。通过控制碳化温度，可以改变多孔碳的石墨化程度和孔隙结构。拉曼光谱和 XPS 光谱显示，GC-800 的石墨化程度很高，sp2 C 含量高达 73%。据低温 N2 物理吸附测量估计，GC-800 的比表面积高达 574 m2-g-1。在 298 K 和 1 bar 条件下，它对 C2H6 的平衡吸附容量为 2.16 mmol-g-1，C2H6/C2H4（1:1 和 1:9，v/v）理想吸附溶液理论选择性分别达到 2.4 和 3.8，明显高于大多数已报道的高性能 C2H6 选择性吸附剂的数值。动态突破实验表明，GC-800 可以一次性从 C2H6 和 C2H4 的混合物中生产出高纯度的 C2H4。动态循环测试证实其具有良好的循环稳定性，即使在潮湿条件下也能有效分离 C2H6/C2H4。

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引用次数: 0