Nano-Structures & Nano-Objects最新文献_第9页

State-of-the-art advances in hydrothermally synthesized carbon quantum dots: An extensive review 水热合成碳量子点的最新进展：综述

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-22 DOI: 10.1016/j.nanoso.2025.101533

H.M. Solayman , Kah Hon Leong , Md. Kamal Hossain , Kang Kang , Md. Badiuzzaman Khan , Jheng-Jie Jiang , Azrina Abd Aziz

Fluorescent carbon quantum dots (CQDs) are one of the most recently developed groups of innovative carbon nanomaterials. CQDs possess several unique properties, including low cytotoxicity, excellent photostability, and outstanding biocompatibility that potentially contribute to a wide range of applications. Although numerous synthesis processes have been discovered and reported for CQDs, real-time practical applications and precise controlling of the synthesis process remain difficult. In this regard, the hydrothermal synthesis method is considered to be straightforward and effective due to the high reactivity of the reactants, simplicity of solution control, low environmental impact, and low energy consumption. The synthesis and application of CQDs are covered in several publications; however, there are limited reviews that concentrate on hydrothermal synthesis, their underlying mechanisms, and recent technological developments. Therefore, studying the hydrothermal technique for CQDs using various precursors, characterizations, synthesis affecting factors, and potential applications is provided here. More specifically, this study emphasized the novel contributions, such as systematically summarizing organic molecules, green, animal, human, and industrial waste or byproducts precursors induced CQDs via hydrothermal methods. In addition, this article discusses the underlying reaction mechanisms in depth and provides critical insights into the emerging applications in agricultural, biomedical, environmental, sensing, and energy sectors. This review is expected to provide a strong direction to avoid theoretical doubts and attract more studies into this exciting topic.

荧光碳量子点（CQDs）是近年来发展起来的新型碳纳米材料之一。CQDs具有多种独特的特性，包括低细胞毒性、优异的光稳定性和出色的生物相容性，具有广泛的应用前景。虽然已经发现和报道了许多CQDs的合成方法，但合成过程的实时实际应用和精确控制仍然很困难。因此，水热合成方法具有反应物活性高、溶液控制简单、对环境影响小、能耗低等优点，是一种简单有效的合成方法。CQDs的合成和应用在一些出版物中有介绍；然而，关于水热合成及其潜在机制和最新技术发展的综述有限。因此，本文对不同前驱体的水热合成CQDs技术、表征、合成影响因素及潜在应用进行了研究。更具体地说，本研究强调了新的贡献，例如系统地总结了有机分子，绿色，动物，人类和工业废物或副产品前体通过水热方法诱导CQDs。此外，本文还深入讨论了潜在的反应机制，并对农业、生物医学、环境、传感和能源领域的新兴应用提供了重要见解。本文的综述有望为避免理论疑虑提供有力的方向，并吸引更多的研究进入这一令人兴奋的话题。

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引用次数: 0

Amino acid-modified graphene as a promising nanocarrier for anticancer drugs hydroxyurea and 6-thioguanine: DFT and MD investigations 氨基酸修饰石墨烯作为抗癌药物羟基脲和6-硫鸟嘌呤的有前途的纳米载体：DFT和MD研究

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-21 DOI: 10.1016/j.nanoso.2025.101534

Lala Adetia Marlina , Aulia Sukma Hutama , Saifuddin Aziz , Suci Zulaikha Hildayani , Maula Eka Sriyani , Yanuar Setiadi , Patrik Chandra , Muthia Rahayu Iresha

This study investigates the potential of amino acid-modified graphene (AA-GR) as an effective nanocarrier for delivering two anticancer drugs: hydroxyurea (HU) and 6-thioguanine (TG). Using Density Functional Theory (DFT) and Molecular Dynamics (MD) simulations, the interactions between AA-modified graphene and the selected drugs were thoroughly investigated. Various amino acids—alanine, cysteine, glycine, tryptophan, and tyrosine—were anchored to the graphene surface, with tryptophan-modified graphene (Trp-GR) exhibiting the strongest drug binding. DFT calculations revealed that the adsorption of HU and TG onto AA-GR surfaces is exothermic and spontaneous, with Trp-GR displaying the highest adsorption energy (−31.83 kcal/mol) and the most favorable thermodynamic properties. The calculated Gibbs free energy (ΔG) values for both drugs were negative, confirming the stability of the complexes. MD simulations further demonstrated the stability and dynamic behavior of the drug–nanocarrier complexes in aqueous environments, highlighting the suitability of AA-GR as a potential drug delivery system. The results also show that Trp-GR can adsorb up to five TG molecules, with efficient and rapid drug desorption at physiological temperatures, making it an ideal candidate for controlled drug release. This work paves the way for the development of amino acid-modified graphene as a promising platform for targeted anticancer drug delivery.

本研究探讨了氨基酸修饰石墨烯（AA-GR）作为两种抗癌药物：羟基脲（HU）和6-硫鸟嘌呤（TG）的有效纳米载体的潜力。利用密度泛函理论（DFT）和分子动力学（MD）模拟，深入研究了aa改性石墨烯与所选药物之间的相互作用。各种氨基酸——丙氨酸、半胱氨酸、甘氨酸、色氨酸和酪氨酸——被锚定在石墨烯表面，其中色氨酸修饰的石墨烯（色氨酸- gr）表现出最强的药物结合。DFT计算表明，在AA-GR表面上，HU和TG的吸附是自发和放热的，其中Trp-GR表现出最高的吸附能（- 31.83 kcal/mol）和最有利的热力学性质。计算出的两种药物的吉布斯自由能（ΔG）值均为负，证实了配合物的稳定性。MD模拟进一步证明了药物-纳米载体配合物在水环境中的稳定性和动态行为，突出了AA-GR作为潜在药物递送系统的适用性。结果还表明，Trp-GR可以吸附多达5个TG分子，在生理温度下具有高效、快速的药物解吸能力，是药物控释的理想候选材料。这项工作为氨基酸修饰石墨烯作为靶向抗癌药物递送的有前途的平台的发展铺平了道路。

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引用次数: 0

Titanium oxide-vanadyl phosphate nanocomposite self-support aniline, indole, pyrrole and carbazole polymerization agent 氧化钛-磷酸钒纳米复合材料自支撑苯胺、吲哚、吡咯和咔唑聚合剂

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-20 DOI: 10.1016/j.nanoso.2025.101531

Sadek Khalifa Shakshooki, Moftah Omer Darwish, Najat Ayad Abouzaid

This α-Vanadyl phosphate, VOPO₄.2.5H₂O(VOP), and TiO₂ were prepared and characterized. α-Vanadyl phosphate/titanium dioxide, [TiO₂]_0.25 [VOP]_0.75, nanocomposite was synthesized by dispersing an ethanol suspension. Polymers, polyaniline, polypyrrole, polyindole, and polycarbazole were prepared via self-support of their monomers polymerization, where (VOP/TiO₂) acts as an oxidant. The VOPO₄· 2.5 H₂O (V⁺⁵OP) acts as self-supporting monomers in polymerization, due to part of it being converted to (V⁺⁴OP), TiO₂ enhances the process. Their matrix was confirmed by scanning electron microscopy analysis, Fourier transforms infrared (FT-IR) and ultraviolet-visible (UV-Vis). Color changes support the formation of the polymers. The % in wt. of the polymers was obtained from elemental (CHN)analysis. Their electrical conductivity shows a semiconductor trend.

制备了α-磷酸钒基、voo4.2.5 h2o （VOP）和TiO2，并对其进行了表征。采用乙醇悬浮液分散法制备α-磷酸钒基/二氧化钛（[TiO2]0.25 [VOP]0.75）纳米复合材料。以（VOP/TiO2）为氧化剂，通过单体自支撑聚合法制备了聚苯胺、聚吡咯、聚吲哚和聚咔唑等聚合物。voo4·2.5 H2O （V+5OP）作为自支撑单体在聚合过程中，由于其部分转化为（V+4OP）， TiO2增强了聚合过程。通过扫描电镜分析、傅里叶变换红外（FT-IR）和紫外-可见（UV-Vis）证实了它们的基质。颜色变化支持聚合物的形成。通过元素（CHN）分析得到聚合物的wt %。它们的电导率呈半导体趋势。

引用次数: 0

Effect of GaAs nanostructures on silicon based thin film solar cells 砷化镓纳米结构对硅基薄膜太阳能电池的影响

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-18 DOI: 10.1016/j.nanoso.2025.101527

Arnab Panda , Kanik Palodhi , Prabhakar Sharma , Ritesh Kumar Mishra

The limitation of optical absorption due to a shorter optical path and a low absorption coefficient are the main issues concerning the poor performance of silicon-based thin film solar cells. GaAs nanowires can greatly enhance their efficiency by increasing light trapping and decreasing carrier recombination rate. In this work, a detailed study is done to get an improvement of performance of silicon based thin film solar cell by embedding GaAs nanowire on this structure. To analyse the optical and electrical performance of the structures, finite difference time domain analysis and finite element method respectively are considered. It is seen that the conversion efficiency as well as optical absorption gets effected by the change in position, orientation, dimension, period and angle of inclination of nanowires and also the doping concentration of active material. In order to obtain maximum conversion efficiency, all mentioned parameters are optimised. Our proposed structure under AM1.5 G standard solar irradiance achieves a conversion efficiency of 17.25 % with short circuit current density 31.02 mA/cm² and open circuit voltage 0.662 V for a typical 7 µm

\times

5 µm surface area and 2 µm thick active layer out of which 17 % is GaAs and 83 % is crystalline silicon. Considering the good degree of structural stability, GaAs nanowires are considered to be grown on silicon active material layer and the interwire gaps are filled with benzo cyclobutene (BCB).

硅基薄膜太阳能电池性能不佳的主要问题是由于光程较短和吸收系数低而限制了光吸收。砷化镓纳米线可以通过增加光捕获和降低载流子复合率来大大提高其效率。本文详细研究了在硅基薄膜太阳能电池上嵌入砷化镓纳米线以提高其性能的方法。为了分析结构的光学和电学性能，分别采用时域有限差分法和有限元法。可见，纳米线的位置、取向、尺寸、周期、倾斜角度的变化以及活性物质掺杂浓度对转换效率和光吸收都有影响。为了获得最大的转换效率，对上述参数进行了优化。我们提出的结构在AM1.5 G标准太阳辐照度下的转换效率为17.25 %，短路电流密度为31.02 mA/cm2，开路电压为0.662 V，典型的7 µm × 5µm表面积和2µm厚的有源层中17%是GaAs， 83%是晶体硅。考虑到良好的结构稳定性，可以考虑将砷化镓纳米线生长在硅活性材料层上，并用苯并环丁烯（BCB）填充线隙。

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引用次数: 0

Architecting MXene-based nanocomposite coatings: A paradigm shift in electromagnetic shielding 构建基于mxene的纳米复合涂层：电磁屏蔽的范式转变

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-05 DOI: 10.1016/j.nanoso.2025.101523

Yash Avhad , Shruti Gupta , Arul Jeya Kumar , Balasubramanian Kandasubramanian

MXenes, a swiftly sprouting genus of transition metals with two-dimensional (2D) structures have engrossed momentous exploration interest due to their peculiar chemicophysical attributes and disparate prospective solicitations. This review bestows an encyclopaedic investigation of the characteristics of MXenes, such as their exceptional electromagnetic shielding, configurable chemistry, and stratified structure. These possessions are predominantly determined by idiosyncratic configuration, with–OH, –O, and –F as functional groups. The nucleuses on pioneering synthesis and etching for several MXenes. The emphasis on the exceptional electromagnetic interference (EMI) shielding capabilities of MXenes, which is conceivably pronounced by inherent outstanding dielectric characteristics, and multi-scale structures that postulate efficacious raptness and replication of electromagnetic waves. Furthermore, the photothermal conversion characteristics of MXenes are philanthroping. This mightily interests contenders for various applications. MXenes, illustrated elevated mechanical properties, which are levied in relation to their assimilation into composite materials, where they serve as fortifying agents to enhance robustness and longevity. Moreover, the review scrutinizes the diverse uses for MXenes, including highly vital aerospace, stealth, military, wearable electronics, and energy repository devices like supercapacitors. By synthesizing current progress in the investigation of MXenes, this paper emphasizes their capacity to operate as versatile materials in futuristic defence pertinent technologies.

MXenes是一种迅速发展的具有二维结构的过渡金属，由于其独特的化学物理属性和不同的前景，引起了人们极大的探索兴趣。这篇综述对MXenes的特性进行了百科全书式的研究，例如其特殊的电磁屏蔽、可配置的化学和分层结构。这些占有主要是由特殊结构决定的，- oh， -O和-F是官能团。几种MXenes的开创性合成和刻蚀的核。强调MXenes的特殊电磁干扰（EMI）屏蔽能力，这可以通过固有的杰出介电特性和多尺度结构来实现，这些结构可以假设电磁波的有效捕获和复制。此外，MXenes光热转换特性是慈善的。这极大地吸引了各种应用的竞争者。MXenes显示了机械性能的提高，这与它们在复合材料中的同化有关，在复合材料中，它们作为强化剂来增强坚固性和寿命。此外，该报告还详细审查了MXenes的各种用途，包括至关重要的航空航天、隐身、军事、可穿戴电子产品和超级电容器等能量存储设备。通过综合目前MXenes的研究进展，本文强调了它们在未来国防相关技术中作为多功能材料的能力。

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引用次数: 0

Plant-mediated ZnO nanoparticles using Allophylus concanicus: Synthesis, characterization, and in vitro biological evaluation 植物介导氧化锌纳米颗粒的合成、表征和体外生物学评价

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-05 DOI: 10.1016/j.nanoso.2025.101524

Komalakshi K V , Avinash Arasidda Kamble , Delicia Avilla Barretto , M.S. Divakar , Raju Krishna Chalannavar

This study reports the green synthesis of zinc oxide nanoparticles (ZnONPs) using Allophylus concanicus leaf extract (Ac-ZnONPs) via an eco-friendly co-precipitation method. Nanoparticle formation was confirmed by a color change and a UV–Visible absorption peak at 354 nm. FE-SEM revealed spherical nanoparticles averaging 33.14 nm, with EDX confirming Zn, O, and C. FTIR indicated phenolic and flavonoid functional groups involved in reduction and capping. PXRD patterns matched the hexagonal wurtzite ZnO phase (ICDD No. 01–070–8072), with calculated lattice parameters a= 3.26 A˚ and c= 5.22 A˚. Zeta potential of –18.4 mV suggested moderate colloidal stability. Biological evaluations demonstrated strong antibacterial activity (MICs of 1.25 µg/mL for Gram-positive and 5 µg/mL for Gram-negative bacteria), likely due to ROS generation and membrane disruption. Ac-ZnONPs exhibited excellent antioxidant activity (93.26 % DPPH scavenging at 200 µg/mL) and notable anti-inflammatory activity (IC₅₀ of 15.92 ± 0.56 µg/mL, comparable to diclofenac sodium). Moderate antidiabetic activity was observed (IC₅₀ values of 20.27 ± 0.39 µg/mL for α-amylase and 18.18 ± 0.39 µg/mL for α-glucosidase). These findings highlight the multifunctional bioactivity of Ac-ZnONPs, supporting their potential for diverse biomedical applications and offering a sustainable route for plant-based ZnO nanomaterials.

本文报道了以异叶草叶片提取物（Ac-ZnONPs）为原料，采用共沉淀法绿色合成氧化锌纳米颗粒（ZnONPs）。通过颜色变化和354 nm处的紫外可见吸收峰证实了纳米颗粒的形成。FE-SEM发现了平均为33.14 nm的球形纳米颗粒，EDX证实了Zn、O和c， FTIR表明酚类和类黄酮官能团参与了还原和封盖。PXRD图谱与六方纤锌矿ZnO相（ICDD No. 01-070-8072）相匹配，计算出的晶格参数a= 3.26 a˚，c= 5.22 a˚。Zeta电位为-18.4 mV，胶体稳定性中等。生物学评价显示出较强的抗菌活性（革兰氏阳性菌的mic为1.25 µg/mL，革兰氏阴性菌的mic为5 µg/mL），可能是由于ROS的产生和膜破坏。Ac-ZnONPs表现出优异的抗氧化活性（200 µg/mL时DPPH清除率为93.26 %）和显著的抗炎活性（IC50为15.92 ± 0.56 µg/mL，与双氯芬酸钠相当）。α-淀粉酶的IC50值为20.27 ± 0.39 µg/mL， α-葡萄糖苷酶的IC50值为18.18 ± 0.39 µg/mL。这些发现突出了Ac-ZnONPs的多功能生物活性，支持了它们在多种生物医学应用中的潜力，并为植物基ZnO纳米材料提供了一条可持续的途径。

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引用次数: 0

Investigation of thermal efficiency in SWCNT and MWCNT hybrid nanofluids under transient convection between parallel plates 平行板间瞬态对流下swcnts和MWCNT混合纳米流体热效率的研究

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-01 DOI: 10.1016/j.nanoso.2025.101522

Praveenkumar Badiger , Madhavarao Kulkarni , Praveen Jakkannavar

Transient magnetohydrodynamic convection, that entails the flow of single wall carbon nanotube (SWCNT) and multiwall carbon nanotube (MWCNT)/water (H2O) hybrid nanofluid between two parallel plates, has several applications in science and engineering. In particular, coatings for wires, fibre sheets, optical fibres, photoelectric devices, and solar cells are designed and manufactured. The effects of an external magnetic field on fluid transport properties are investigated. The thermal efficiency behavior of various nanoparticle form factors is investigated. This study looks into flow concerns such as convection, hybrid nanofluid properties, and the applied magnetic field. Fluid flow is represented mathematically by coupled partial differential equations with specified boundary circumstances. The finite difference method is being used in conjunction with the appropriate analogous transformations to convert the governing equations into dimensionless form. Better heat transfer is obtained when hybrid nanoparticles are added to base liquid as opposed to base fluid and nanofluid alone, according to simulations for different physical parameters in the model. Greater values of the velocity ratio and combination of convection parameters result in a rise in the hybrid nanofluid's velocity. As the magnetic parameter and volume fraction of SWCNT-MWCNT grows, temperature of hybrid nanofluid rises sharply.

瞬态磁流体动力学对流是指单壁碳纳米管（SWCNT）和多壁碳纳米管(MWCNT)/水（H2O）混合纳米流体在两个平行板之间的流动，在科学和工程上有许多应用。特别是电线、纤维片、光纤、光电器件和太阳能电池的涂层的设计和制造。研究了外加磁场对流体输运特性的影响。研究了不同形状的纳米颗粒的热效率行为。本研究着眼于流动问题，如对流、混合纳米流体性质和外加磁场。流体流动用具有特定边界条件的耦合偏微分方程在数学上表示。将有限差分法与适当的类似变换相结合，将控制方程转化为无量纲形式。根据模型中不同物理参数的模拟，混合纳米颗粒加入基液比单独加入基液和纳米流体获得更好的传热效果。流速比和对流参数组合的值越大，混合纳米流体的速度越快。随着swcnts - mwcnt的磁性参数和体积分数的增大，杂化纳米流体的温度急剧升高。

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引用次数: 0

Functionalization of 6-mercaptopyridine-3-carboxylic acid on gold nanoparticles for selective and sensitive detection of heavy metal cadmium 6-巯基吡啶-3-羧酸在金纳米粒子上的功能化选择性灵敏检测重金属镉

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-08-01 DOI: 10.1016/j.nanoso.2025.101521

Kizafa Aftab, Shahida Rashid, Jigneshkumar V. Rohit

Cadmium (Cd⁺²) is a hazardous heavy metal that can cause serious health problems, including cancer. Because of this, the World health organization (WHO) fixed the maximum allowed limit of Cd⁺² in drinking water or industrial wastewater is 3.0 µgL⁻¹. To accurately detect even lower concentration of Cd⁺², a reliable and easy-to-use method was developed by our group. Here in this work, simple and visual detection was proposed to detect Cd²⁺ ions by using 6-Mercaptopyridine-3-carboxylic acid functionalized gold nanoparticles (MPyC-AuNPs). The prepared MPyC-AuNPs were characterized by UV–visible spectrometry, dynamic light scattering (DLS), zeta potential and Fourier transform infrared spectroscopy (FT-IR). The characteristic surface plasmon resonance (SPR) peak of MPyC-AuNPs was observed at 524 nm, and the aggregation of MPyC-AuNPs leads to spectral change from 524 nm to 677 nm. The aggregation is due to the formation of the metal ligand coordination between MPyC-AuNPs and Cd²⁺ ions. Moreover, MPyC-AuNPs based sensor is highly selective for the detection of Cd²⁺ and giving response only for Cd²⁺ among tested metal ions. Under the optimal conditions, a good linear relationship (R² = 0.9956) was observed between the ratio of the extinction at 680 nm to that at 524 nm and the concentration of Cd²⁺ over the range of 1 µM - 100 µM. The detection limit was found to be 5.4 × 10⁻⁷µM, which is equal to 0.0607µgL⁻¹ lesser than the allowed limit by WHO. Moreover, the developed sensor was capable to detect Cd²⁺ from water samples with good recovery and lesser relative standard deviation. Thus MPyC-AuNPs proven as efficient sensors for the on-site monitoring of Cd²⁺ in water (tap, river and canal) samples.

镉（Cd+2）是一种危险的重金属，会导致严重的健康问题，包括癌症。因此，世界卫生组织（WHO）规定饮用水或工业废水中Cd+2的最大允许限量为3.0µgL−1。为了准确检测更低浓度的Cd+2，本课题组开发了一种可靠且易于使用的方法。本文提出了利用6-巯基吡啶-3-羧酸功能化金纳米粒子（MPyC-AuNPs）检测Cd2+离子的简单、直观的方法。采用紫外可见光谱、动态光散射（DLS）、zeta电位和傅里叶变换红外光谱（FT-IR）对制备的MPyC-AuNPs进行了表征。在524 nm处观察到MPyC-AuNPs的特征表面等离子体共振（SPR）峰，MPyC-AuNPs的聚集导致光谱从524 nm变化到677 nm。这种聚集是由于MPyC-AuNPs和Cd2+离子之间形成金属配体配位。此外，基于MPyC-AuNPs的传感器对Cd2+的检测具有高度选择性，并且在被测金属离子中仅对Cd2+做出响应。在最优条件下，在680 nm处消光比与524 nm处消光比与Cd2+浓度在1 µM ~ 100 µM范围内呈良好的线性关系（R2 = 0.9956）。检出限为5.4 × 10−7µM，比WHO标准低0.0607µgL−1。此外，所开发的传感器能够检测水样中的Cd2+，回收率好，相对标准偏差小。因此，MPyC-AuNPs被证明是现场监测水（自来水、河流和运河）样品中Cd2+的有效传感器。

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引用次数: 0

Impact of synthesis temperature on the physicochemical and optoelectronic properties of titania and oxidized carbon nanotube nanocomposites for the degradation of Remazol brilliant blue R 合成温度对氧化碳纳米管/二氧化钛纳米复合材料降解雷马唑亮蓝R的理化及光电性能的影响

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-07-29 DOI: 10.1016/j.nanoso.2025.101519

Standford M. Pedzisai , Sithembela A. Zikalala , Lerato L. Mokoloko , Nozipho N. Gumbi , Machawe M. Motsa , Edward N. Nxumalo

A facile microwave irradiation-assisted hydrothermal method was employed in the synthesis of nanocomposites of titanium dioxide (TiO₂) and oxidized carbon nanotubes (OCNTs) to investigate the effect of synthesis temperature on their properties and photocatalytic performance. The synthesis temperatures used were 90, 120, 150, and 180 °C to produce nanocomposites T90, T120, T150, and T180, respectively. Attachment of TiO₂ to the surface of the OCNTs and presence of the OCNTs thereof was confirmed by transmission electron microscopy (TEM) as well as Raman spectroscopy. Powder X-ray diffraction (p-XRD) confirmed that the syntheses yielded the anatase titania crystalline polymorph. Ultraviolet (UV) spectroscopy results showed that the indirect energy bandgaps of the nanocomposites were all within the visible light range and increased with synthesis temperature in the order 2.34 eV, 2.75 eV, 2.87 eV, and 3.08 eV. Charge carrier recombination inhibition also increased with the synthesis temperature of the nanocomposites as revealed by the photoluminescence (PL) studies, at an excitation wavelength of 410 nm. The photocatalytic activities of the nanocomposites were tested in the photodegradation of Remazol brilliant blue R (RBBR) dye under sunlight for up to 180 min and the degradation followed the pseudo first order kinetics. Interestingly, the T180 nanocomposite demonstrated favorable comparability with other photocatalysts that have previously been applied for the degradation of RBBR dye in that, using sunlight , 99.1 % of the dye was degraded in a saline environment within 240 min, at a high pollutant to photocatalyst loading ratio. T180 further demonstrated high reusability without washing between the cycles by retaining in its 5th cycle 69.6 % and 89.5 % of its photocatalytic activity after 180 and 240 min, respectively. Based on this work, T180 is a potential catalyst for application in the remediation of industrial textile wastewater, especially laden with reactive dyes.

采用微波辅助水热法制备了二氧化钛（TiO2）与氧化碳纳米管（OCNTs）纳米复合材料，考察了合成温度对其性能和光催化性能的影响。合成温度分别为90、120、150和180℃，制备了T90、T120、T150和T180纳米复合材料。通过透射电子显微镜（TEM）和拉曼光谱（Raman spectroscopy）证实了二氧化钛附着在碳纳米管表面以及碳纳米管的存在。粉末x射线衍射（p-XRD）证实该合成产物为锐钛矿型钛晶多晶。紫外光谱结果表明，纳米复合材料的间接能隙均在可见光范围内，并随合成温度的升高依次增大，分别为2.34 eV、2.75 eV、2.87 eV和3.08 eV。光致发光（PL）研究表明，在激发波长为410 nm时，随着纳米复合材料合成温度的升高，载流子复合的抑制作用也有所增强。在180 min的光照下，测试了纳米复合材料对雷马唑亮蓝R （RBBR）染料的光催化活性，降解符合准一级动力学。有趣的是，T180纳米复合材料与之前用于降解RBBR染料的其他光催化剂表现出良好的可比性，在240 min的盐水环境中，在高污染物和光催化剂负载比下，99.1 %的染料在阳光下被降解。T180在180和240 min后，在第5个循环中分别保持了69.6 %和89.5 %的光催化活性，进一步证明了高的可重复使用性。研究结果表明，T180是一种很有潜力的催化剂，可用于工业纺织废水，特别是含活性染料废水的修复。

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引用次数: 0

Design and energy storage behavior of conductive polymer-nickel ferrite nanocomposites 导电聚合物-镍铁氧体纳米复合材料的设计与储能性能

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2025-07-25 DOI: 10.1016/j.nanoso.2025.101520

Süleyman Kerli , Ali Kemal Soğuksu , Ümit Alver

In this study, a new composite material was developed by coating polyaniline (PANI) onto hydrothermally synthesized nickel ferrite via oxidative polymerization. Structural and chemical properties were characterized using XRD, SEM, XPS, and FTIR. XRD confirmed the crystalline phases, while SEM revealed the surface morphology. XPS demonstrated successful incorporation into PANI, particularly by determining the oxidation states of Ni and Fe. FTIR evaluated the bonding between the components. Electrochemical performance was investigated using CV tests at scan rates of 10–100 mV s⁻¹ and GCD tests at current densities of 20–80 mA cm⁻². The annealed nickel ferrite-PANI composite exhibited a high areal capacitance of 17.76 F.cm⁻² at 20 mA cm⁻². It also demonstrated good rate capability and cycling stability. EIS analysis revealed that this electrode has a low impedance, particularly in the low-frequency region, allowing for faster charge transfer and ion diffusion. In conclusion, the combination of heat-treated nickel ferrite and conductive PANI creates an electrode material with superior energy storage properties.

本研究将聚苯胺（PANI）通过氧化聚合涂覆在水热合成的铁氧体镍上，制备了一种新型复合材料。采用XRD、SEM、XPS和FTIR对其结构和化学性质进行了表征。XRD证实了晶体相，SEM显示了表面形貌。XPS证明了与聚苯胺的成功结合，特别是通过测定Ni和Fe的氧化态。FTIR评估了组分之间的结合。用扫描速率为10-100 mV s⁻¹ 的CV测试和电流密度为20-80 mA cm⁻²的GCD测试来研究电化学性能。退火后的铁素体镍-聚苯胺复合材料具有17.76 F的高面电容。cm⁻²在20 mA cm⁻²。同时也表现出良好的速率性能和循环稳定性。EIS分析表明，该电极具有低阻抗，特别是在低频区域，允许更快的电荷转移和离子扩散。总之，热处理镍铁氧体和导电聚苯胺的组合创造了一种具有优异储能性能的电极材料。

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