Nano Materials Science最新文献_第10页

Progress in doping and crystal deformation for polyanions cathode based lithium-ion batteries 聚阴离子正极锂离子电池的掺杂和晶体变形研究进展

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2024.01.004

Sajeela Awasthi , Srikanta Moharana , Vaneet Kumar , Nannan Wang , Elham Chmanehpour , Anupam Deep Sharma , Santosh K. Tiwari , Vijay Kumar , Yogendra Kumar Mishra

Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithium-ion batteries (LIBs) due to their good stability, safety, cost-effectiveness, suitable voltages, and minimal environmental impact. However, these materials suffer from poor rate capability and low-temperature performance owing to limited electronic and ionic conductivity, which restricts their practical applicability. Recent developments, such as coating material particles with carbon or a conductive polymer, crystal deformation through the doping of foreign metal ions, and the production of nanostructured materials, have significantly enhanced the electrochemical performances of these materials. The successful applications of polyanion-based materials, especially in lithium-ion batteries, have been extensively reported. This comprehensive review discusses the current progress in crystal deformation in polyanion-based cathode materials, including phosphates, fluorophosphates, pyrophosphates, borates, silicates, sulfates, fluorosilicates, and oxalates. Therefore, this review provides detailed discussions on their synthesis strategies, electrochemical performance, and the doping of various ions.

聚阴离子基材料具有良好的稳定性、安全性、成本效益、合适的电压和最小的环境影响，因此被认为是最具吸引力和前景的锂离子电池（LIB）正极材料之一。然而，由于电子和离子导电性有限，这些材料的速率能力和低温性能较差，限制了它们的实际应用。最近的发展，如在材料颗粒上涂覆碳或导电聚合物、通过掺杂外来金属离子实现晶体变形，以及生产纳米结构材料等，大大提高了这些材料的电化学性能。聚阴离子基材料的成功应用，尤其是在锂离子电池中的应用，已被广泛报道。本综述全面讨论了目前在聚阴离子基正极材料晶体变形方面取得的进展，包括磷酸盐、氟磷酸盐、焦磷酸盐、硼酸盐、硅酸盐、硫酸盐、氟硅酸盐和草酸盐。因此，本综述将详细讨论它们的合成策略、电化学性能以及各种离子的掺杂。

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引用次数: 0

Chemical incorporation of SiO2 into TiO2 layer by green plasma enhancer and quencher agents for synchronized improvements in the protective and bioactive properties 通过绿色等离子体增强剂和淬灭剂将 SiO2 化学掺入 TiO2 层，同步提高保护和生物活性性能

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2024.01.003

Mosab Kaseem , Ananda Repycha Safira , Mohammad Aadil , Han-Choel Choe

This study explores the dynamic interaction between environmentally sustainable plasma enhancer and quencher agents during the incorporation of SiO₂ into a TiO₂ layer, with the primary objective of simultaneously augmenting protective and bioactive attributes. This enhancement is realized through the synergistic utilization of Tetraethyl orthosilicate (TE) and Stevia (ST) within a plasma-assisted oxidation process. To achieve this goal, Ti–6Al–4V alloy underwent oxidation in an electrolyte solution containing acetate-glycerophosphate, with the addition of TE and ST separately and in combination. TE, as a silicon oxide (SiO₂) precursor, facilitates the creation of a calcium-rich, rough, porous layer by undergoing hydrolysis to generate silanol groups (Si–OH), which subsequently condense into silicon-oxygen-silicon (Si–O–Si) bonds, resulting in SiO₂ formation. In contrast, ST acts as a plasma quencher, absorbing highly reactive plasma species during the oxidation process, reducing energy levels, and diminishing sparking intensity. The combination of TE and ST results in moderate sparking, balancing Stevia's quenching effect and TE's sparking influence. As a result, this coating exhibits enhanced corrosion resistance and bioactivity compared to using either ST or TE alone. The study highlights the potential of this synergistic approach for advanced TiO₂-based coatings.

本研究探讨了在二氧化硅加入二氧化钛层的过程中，环境可持续的等离子体增强剂和淬灭剂之间的动态相互作用，其主要目的是同时增强保护性和生物活性。通过在等离子辅助氧化过程中协同使用正硅酸四乙酯（TE）和甜叶菊（ST），实现了这种增强效果。为了实现这一目标，Ti-6Al-4V 合金在含有醋酸盐-甘油磷酸酯的电解质溶液中进行氧化，并分别和同时加入 TE 和 ST。TE 作为一种氧化硅 (SiO2) 前体，通过水解生成硅醇基团 (Si-OH)，进而凝结成硅-氧-硅键 (Si-O-Si)，形成 SiO2，从而促进富钙粗糙多孔层的形成。与此相反，ST 可作为等离子体淬火剂，在氧化过程中吸收高活性等离子体物质，降低能量水平，减弱火花强度。TE 和 ST 的组合可产生适度的火花，平衡了甜菊糖的淬火作用和 TE 的火花影响。因此，与单独使用 ST 或 TE 相比，这种涂层具有更强的耐腐蚀性和生物活性。这项研究强调了这种协同方法在基于二氧化钛的先进涂层方面的潜力。

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引用次数: 0

Synthesis of reduced graphene oxide nanosheets from sugarcane dry leaves by two-stage pyrolysis for antibacterial activity 通过两级热解从甘蔗干叶中合成具有抗菌活性的还原氧化石墨烯纳米片

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2024.01.006

Baskar Thangaraj , Pravin Raj Solomon , Nutthapon Wongyao , Mohamed I. Helal , Ali Abdullah , Sufian Abedrabbo , Jamal Hassan

Oxidative-exfoliation methods were in vogue in the production of rGO from graphite. Processing of such synthetic graphite needs high temperatures (≥2500 °C). Thus, such process is not cost-effective. The present study is made on the dry leaves of sugarcane (Saccharum officinarum) as an alternative raw material so as to be economical and environmentally benign. The dry leaves are subjected to two-step pyrolysis without any catalyst or reducing agent in far divergent temperatures to produce as prepared and acid treated rGOs. They were evaluated by UV–Vis., FTIR, XRD, Raman spectroscopy, TGA/DTG, BET, FESEM-EDS and TEM. The as prepared rGO has few layers with irregular and folded architecture whereas acid-treated rGO has thinly stacked crumpled sheets with many wrinkles on its surface. The prepared rGOs have multilayered graphitic structure due to the unique ratio between G and D bands. Acid treated rGO has poor thermal stability as compared to that of as-prepared rGO at high temperatures due to the variation in the oxygen-containing functional groups. Acid treated rGO has low antibacterial activity as compared to that of the as-prepared rGO due to the paucity of the functional groups.

氧化-剥离法是从石墨中生产 rGO 的流行方法。这种合成石墨的加工需要高温（≥2500 ℃）。因此，这种工艺不符合成本效益。本研究采用甘蔗（Saccharum officinarum）的干叶作为替代原料，以实现经济性和环保性。在不同温度下，不使用任何催化剂或还原剂，对干叶进行两步热解，制备出经酸处理的 rGOs。对它们进行了紫外可见光、傅立叶变换红外光谱、XRD、拉曼光谱、TGA/DTG、BET、FESEM-EDS 和 TEM 评估。制备的 rGO 只有几层，具有不规则的折叠结构，而经过酸处理的 rGO 则是薄薄地堆叠在一起，表面有许多皱褶。制备的 rGO 具有多层石墨结构，这得益于 G 带和 D 带之间独特的比率。由于含氧官能团的变化，与制备的 rGO 相比，酸处理的 rGO 在高温下的热稳定性较差。与制备的 rGO 相比，酸处理 rGO 的抗菌活性较低，原因是功能基团较少。

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引用次数: 0

Nickel-based superalloy architectures with surface mechanical attrition treatment: Compressive properties and collapse behaviour 经表面机械研磨处理的镍基超级合金结构：抗压性能和塌陷行为

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2023.11.008

Lizi Cheng , Xiaofeng Zhang , Jiacheng Xu , Temitope Olumide Olugbade , Gan Li , Dongdong Dong , Fucong Lyu , Haojie Kong , Mengke Huo , Jian Lu

Surface modifications can introduce natural gradients or structural hierarchy into human-made microlattices, making them simultaneously strong and tough. Herein, we describe our investigations of the mechanical properties and the underlying mechanisms of additively manufactured nickel–chromium superalloy (IN625) microlattices after surface mechanical attrition treatment (SMAT). Our results demonstrated that SMAT increased the yielding strength of these microlattices by more than 64.71% and also triggered a transition in their mechanical behaviour. Two primary failure modes were distinguished: weak global deformation, and layer-by-layer collapse, with the latter enhanced by SMAT. The significantly improved mechanical performance was attributable to the ultrafine and hard graded-nanograin layer induced by SMAT, which effectively leveraged the material and structural effects. These results were further validated by finite element analysis. This work provides insight into collapse behaviour and should facilitate the design of ultralight yet buckling-resistant cellular materials.

表面改性可以在人造微晶格中引入自然梯度或结构层次，使其同时具有强度和韧性。在此，我们介绍了我们对添加制造的镍铬超级合金（IN625）微晶格经过表面机械损耗处理（SMAT）后的机械性能和内在机理的研究。我们的研究结果表明，SMAT 使这些微晶格的屈服强度提高了 64.71% 以上，并引发了其机械性能的转变。我们发现了两种主要的失效模式：微弱的整体变形和逐层塌陷，后者在 SMAT 的作用下得到了增强。机械性能的明显改善归功于 SMAT 诱导的超细和坚硬的分级纳米晶粒层，它有效地利用了材料和结构效应。有限元分析进一步验证了这些结果。这项研究深入揭示了塌陷行为，有助于设计超轻且抗弯曲的蜂窝材料。

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引用次数: 0

Utilizing a defective MgO layer for engineering multifunctional Co-MOF hybrid materials with tailored leaf-like and polyhedral structures for optimal electrochemical and photocatalytic activities 利用有缺陷的氧化镁层设计具有定制叶状和多面体结构的多功能 Co-MOF 混合材料，以获得最佳电化学和光催化活性

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2023.12.003

Mohammad Aadil, Muhammad Ali Khan, Safira Ananda Repycha, Mosab Kaseem

The hybridization of metal-organic framework (MOF) with inorganic layers would lead to the discovery of novel hybrid materials that can provide a compelling strategy for enhancing its photocatalytic and electrochemical response. In the present study, a highly efficient multifunctional hybrid material was developed by exploiting the defective layer formed on AZ31 Mg alloy through plasma electrolytic oxidation (PEO) as a nucleation and growth site for Co-MOF. The concentrations of the organic linker 2-Methylimidazole (2,MIm) and cobalt nitrate as a source of Co²⁺ ions were varied to control the growth of the obtained Co-MOF. Lower concentrations of the 2, MIm ligand favored the formation of leaf-like MOF structures through an anisotropic, two-dimensional growth, while higher concentrations led to rapid, isotropic nucleation and the creation of polyhedral Co-MOF structures. The sample characterized by polyhedral Co-MOF structures exhibited superior electrochemical stability, with the lowest corrosion current density (3.11 × 10⁻⁹ A/cm²) and the highest top layer resistance (2.34 × 10⁶ Ω cm²), and demonstrated outstanding photocatalytic efficiency, achieving a remarkable 99.98 % degradation of methylene blue, an organic pollutant, in model wastewater. To assess the active adsorption sites of the Co-MOF, density functional theory (DFT) was utilized. This study explores the changes in morphologies of the coatings of Co-MOF with the change of solution concentration to form coatings with enhanced properties on the metallic substrate, which could establish the groundwork for the development of next-generation multifunctional frameworks with diverse applications.

金属有机框架（MOF）与无机层的杂化将导致新型杂化材料的发现，从而为增强其光催化和电化学响应提供了一种令人信服的策略。本研究利用等离子电解氧化（PEO）在 AZ31 Mg 合金上形成的缺陷层作为 Co-MOF 的成核和生长场所，开发了一种高效的多功能杂化材料。通过改变有机连接剂 2-甲基咪唑（2,MIm）和作为 Co2+ 离子源的硝酸钴的浓度来控制 Co-MOF 的生长。较低浓度的 2，MIm 配体有利于通过各向异性的二维生长形成叶状 MOF 结构，而较高浓度的 2，MIm 配体则会导致快速的各向同性成核，并形成多面体 Co-MOF 结构。以多面体 Co-MOF 结构为特征的样品表现出卓越的电化学稳定性，具有最低的腐蚀电流密度（3.11 × 10-9 A/cm2）和最高的顶层电阻（2.34 × 106 Ω cm2），并具有出色的光催化效率，对模型废水中的有机污染物亚甲基蓝的降解率高达 99.98%。为了评估 Co-MOF 的活性吸附位点，研究人员采用了密度泛函理论（DFT）。本研究探讨了 Co-MOF 涂层的形态随溶液浓度的变化而变化，从而在金属基底上形成具有增强性能的涂层，这为开发具有多种应用的下一代多功能框架奠定了基础。

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引用次数: 0

Silicon-based dielectric elastomer with amino-complexed hybrids towards high actuation performance 硅基介电弹性体与氨基络合混合物的高致动性能

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2023.12.009

Zhengxing Dai , Qingqing Liu , Xiaodong Qi , Nan Zhang , Ting Huang , Jinghui Yang , Yong Wang

For improving the actuation performance at low electric fields of dielectric elastomers, achieving high dielectric constant (ɛ_r) and low modulus (Y) simultaneously has been targeted in the past decades, but there are few ways to accomplish both. In contrast to the classical strategies such as incorporating plasticizers or ceramic to prepare the silicon-based dielectric elastomers, here, blending an amino-complexed hybrid (polyethyleneimine (PEI)-Ag) with polydimethylsiloxane (PDMS) elastomer is reported as an alternative strategy to tailor the ɛ_r and Y. PEI-Ag not only exhibits excellent dielectric enhancement properties but also minimizes the PDMS crosslinking through amino-complexed reaction between PEI and Pt catalysts. The prepared dielectric elastomers have a ɛ_r of 7.2 @ 10³ Hz and Y of 1.14 MPa, leading to an actuation strain of 22.27 % at 35 V/μm. Hence, incorporating such novel hybrids based on dual amino-complexed effect on both matrix and particles sufficiently promotes the actuated performance of dielectric elastomers.

为了提高介电弹性体在低电场下的致动性能，过去几十年来，人们一直致力于同时实现高介电常数（ɛr）和低模量（Y），但同时实现这两个目标的方法却不多。与加入增塑剂或陶瓷等传统方法制备硅基介电弹性体不同，本文报道了将氨基络合混合物（聚乙烯亚胺（PEI）-Ag）与聚二甲基硅氧烷（PDMS）弹性体混合作为定制ɛr 和 Y 的替代方法。所制备的介电弹性体的ɛr 为 7.2 @ 103 Hz，Y 为 1.14 MPa，在 35 V/μm 时的致动应变为 22.27 %。因此，在基体和颗粒中加入这种基于双氨基络合效应的新型混合材料，可充分提高介电弹性体的致动性能。

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引用次数: 0

Spatially engineering tri-layer nanofiber dressings featuring asymmetric wettability for wound healing 空间工程三层纳米纤维敷料具有非对称润湿性，可促进伤口愈合

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-10-01 DOI: 10.1016/j.nanoms.2024.01.008

Tingting Shi , Yuan Liu , Donghui Wang , Dan Xia , Baoe Li , Ruodan Xu , Ning Li , Chunyong Liang , Menglin Chen

Inspired by the skin structure, an asymmetric wettability tri-layer nanofiber membrane (TNM) consisting of hydrophilic inner layer loaded with lidocaine hydrochloride (LID), hydrophobic middle layer with ciprofloxacin (CIP) and hydrophobic outer layer has been created. The hydrophobic outer layer endows the TNM with waterproof function and anti-adhesion from contaminants. The hydrophobic middle layer with CIP preserves long-term inhibition of bacteria growth and the hydrophilic inner layer with LID possesses optimal water-absorbing capacity and air permeability. The TNM dramatically elevates the water contact angles from 10° (inner layer) to 120° (outer layer), indicating an asymmetric wettability, which could directionally transport wound exudate within the materials and meanwhile maintain a comfortable and moist environment to promote wound healing. Furthermore, the sequential release of LID and CIP could relieve pain rapidly and achieve antibacterial effect in the long run, respectively. In addition, the TNM shows superior biocompatibility towards L929 cells. The in vivo results show the TNM could prevent infection, accelerate epithelial regeneration and significantly accelerate wound healing. This study indicates the developed TNM with asymmetrical wettability and synergetic drug release shows great potential as a wound dressing in clinical application.

受皮肤结构的启发，一种非对称润湿性三层纳米纤维膜（TNM）应运而生，它由含有盐酸利多卡因（LID）的亲水性内层、含有环丙沙星（CIP）的疏水性中层和疏水性外层组成。疏水性外层赋予 TNM 防水功能，并防止污染物附着。带有 CIP 的疏水性中间层可长期抑制细菌生长，而带有 LID 的亲水性内层则具有最佳的吸水能力和透气性。TNM 显著提高了水接触角，从 10°（内层）到 120°（外层），显示出非对称润湿性，可定向输送材料内的伤口渗出物，同时保持舒适湿润的环境，促进伤口愈合。此外，LID 和 CIP 的顺序释放可分别快速止痛和长期抗菌。此外，TNM 对 L929 细胞具有良好的生物相容性。体内研究结果表明，TNM 可预防感染、加速上皮再生并显著加快伤口愈合。这项研究表明，所开发的具有非对称润湿性和协同药物释放功能的 TNM 作为一种伤口敷料在临床应用方面具有巨大的潜力。

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引用次数: 0

Facile synthesis of high-performance and self-healing polyurethane-urea nanocomposites reinforced with graphene 石墨烯增强高性能自修复聚氨酯-尿素纳米复合材料的快速合成

IF 17.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-09-28 DOI: 10.1016/j.nanoms.2024.08.007

Qingshi Meng , Zhaoyang Xu , Yin Yu , Yikuan Li , Abdullatif Lacina Diaby , Sherif Araby

In this study, a facile method was employed to synthesize strong, yet highly elastic polyurethane-urea (PUU) with typical characteristics and 94 % optical transmittance. Graphene platelets (GNPs) were prepared and modified via a scalable and eco-friendly mechanochemical approach. The produced GNPs is at 1.6-nm thickness with high electrical conductivity of ∼950 S/m. The structure-property relations of PUU/GNP nanocomposites were comprehensively investigated through morphology and mechanical properties measurements. The strong interface and high-density hydrogen bonds between modified GNPs (M-GNPs) and PUU significantly enhanced the mechanical properties of the PUU nanocomposite. The PUU composite showed 66.7 % and 36.2 % increments in tensile and impact strengths, respectively, at 0.2 wt% M-GNPs. The reversible hydrogen bond between M-GNPs and PUU endowed the nanocomposite with self-healing properties achieving 97.8 % healing efficiency of the strength after 5 h at 120 °C. This study demonstrates the importance of surface modification and provides a simple yet robust approach for preparing high-performance and functional PUU/graphene composites.

在这项研究中，采用一种简单的方法合成了强韧，高弹性的聚氨酯-尿素（PUU），具有典型的特性和94%的透光率。通过可扩展和环保的机械化学方法制备和改性石墨烯薄片（GNPs）。制备的GNPs厚度为1.6 nm，电导率高达~ 950 S/m。通过形貌和力学性能测试，全面研究了PUU/GNP纳米复合材料的结构与性能关系。改性GNPs （M-GNPs）与PUU之间的强界面和高密度氢键显著提高了PUU纳米复合材料的力学性能。在0.2 wt% M-GNPs下，PUU复合材料的拉伸强度和冲击强度分别增加了66.7%和36.2%。M-GNPs和PUU之间的可逆氢键使纳米复合材料具有自修复性能，在120℃下处理5 h后，修复效率达到强度的97.8%。该研究证明了表面改性的重要性，并为制备高性能和功能性PUU/石墨烯复合材料提供了一种简单而可靠的方法。

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引用次数: 0

Preparation and characterization of silane film modified with hydroxyapatite nanoparticles on magnesium alloy: Blistering initiating film failure and inhibitory effect of hydroxyapatite nanoparticles 镁合金表面羟基磷灰石纳米颗粒改性硅烷膜的制备与表征：羟基磷灰石纳米颗粒起泡引发膜失效及抑制作用

IF 17.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-08-10 DOI: 10.1016/j.nanoms.2024.06.011

Zhigang Song , Yue Mu , Guiyong Xiao , Ming Xie , Guanghao Gong , Yupeng Lu

Rapid corrosion of magnesium alloys in the physiological environment limits their use as orthopedic implant materials. Therefore, the silane film modified with nano-hydroxyapatite (nHA) was prepared on the surface of AZ31 magnesium alloy to improve its corrosion resistance. The silane films are continuous, uniform, and adherent well to the Mg substrate, and the modification of the film by nHA increased the thickness from ∼1.92 to ∼3.25 μm. Compared to the bare substrate, the corrosion current density of the sample with the silane film modified with nHA decreases by three orders of magnitude from 9.23× 10⁻⁵ to 2.779 × 10⁻⁸ A/cm². According to the immersion tests, it is found that the synergistic effect of sub-film corrosion and blistering is the dominant mode of film failure. During the immersion of less than 72 h, the modification by nHA improves the corrosion resistance by delaying the sub-film corrosion and blistering of the film.

镁合金在生理环境中的快速腐蚀限制了其作为骨科植入材料的应用。为此，在AZ31镁合金表面制备了纳米羟基磷灰石（nHA）改性硅烷膜，以提高AZ31镁合金的耐腐蚀性。硅烷膜连续均匀，与Mg衬底的附着力良好，nHA改性后膜的厚度从~ 1.92 μm增加到~ 3.25 μm。与裸基板相比，经nHA修饰的硅烷膜样品的腐蚀电流密度从9.23× 10−5降至2.779 × 10−8 A/cm2，降低了3个数量级。浸没试验结果表明，亚膜腐蚀与起泡的协同作用是膜破坏的主要模式。在浸泡时间小于72h的情况下，nHA改性通过延缓膜的亚膜腐蚀和膜的起泡，提高了膜的耐蚀性。

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引用次数: 0

Structural effects induced by dialysis-based purification of carbon nanomaterials 透析法提纯碳纳米材料的结构效应

IF 9.9 2区材料科学 Q1 Engineering

Nano Materials Science

Pub Date : 2024-08-01 DOI: 10.1016/j.nanoms.2023.12.002

Dialysis plays a crucial role in the purification of nanomaterials but its impact on the structural properties of carbon nanomaterials was never investigated. Herein, a carbon-based nanomaterial generated electrochemically in potassium phosphate buffer, was characterized before and after dialysis against pure water. It is shown that dialysis affects the size of the carbon domains, structural organization, surface functionalization, oxidation degree of carbon, and grade of amorphicity. Accordingly, dialysis drives the nanomaterial organization from discrete roundish carbon domains, with sizes ranging from 70 to 160 nm, towards linear stacking structures of small nanoparticles (<15 nm). In parallel, alcohol and ether (epoxide) surface groups evolve into more oxidized carbon groups (e.g., ketone and ester groups). Investigation of the as-prepared nanomaterial by electron paramagnetic resonance (EPR) revealed a resonance signal consistent with carbon-oxygen centred radicals.

Additionally, this study brings to light the selective affinity of the carbon nanomaterial under study to capture Na⁺ ions, a property greatly enhanced by the dialysis process, and its high ability to trap oxygen, particularly before dialysis. These findings open new perspectives for the application of carbon-based nanomaterials and raise awareness of the importance of structural changes that can occur during the purification of carbon-based nanomaterials.

透析在纳米材料的纯化过程中起着至关重要的作用，但透析对碳纳米材料结构特性的影响却从未被研究过。本文对在磷酸二氢钾缓冲液中电化学生成的碳基纳米材料进行了透析前后的表征。结果表明，透析会影响碳域的大小、结构组织、表面功能化、碳的氧化程度和非晶态等级。因此，透析促使纳米材料的组织结构从离散的圆形碳域（大小从 70 纳米到 160 纳米不等）向小纳米颗粒（15 纳米）的线性堆叠结构转变。与此同时，醇和醚（环氧化物）表面基团演变成更氧化的碳基团（如酮和酯基团）。此外，这项研究还揭示了所研究的碳纳米材料捕获 Na+ 离子的选择性亲和力（这一特性在透析过程中得到了极大增强），以及其捕获氧气的高能力，尤其是在透析之前。这些发现为碳基纳米材料的应用开辟了新的前景，并提高了人们对碳基纳米材料纯化过程中可能发生的结构变化的重要性的认识。

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引用次数: 0