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Mihaela Homocianu 《高分子科学杂志,C辑:聚合物评论》2020,60(3):493-541
AbstractMaterials based on polymer-inorganic nanostructures, e(Polym/INS), produced by combining functional polymers with inorganic nanostructured compounds represent a major area of research with many applications. This review provides a summary of the most relevant polymer-inorganic nanostructured systems found in the literature over the last decade. Then the most relevant and specific features of these systems are described. Finally, we summarize the progress made over the last decade in the development of polymer-inorganic electrospun hybrid materials with various morphologies, compositions and applications in environmental remediation, sensors, catalysts, energy area and biomedical uses. 相似文献
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The change in reactivity for nanostructured iron oxide within mesoporous silica materials is demonstrated. Iron oxides were incorporated into the pore system of MCM‐41 and MCM‐48 silica materials and characterized by powder X‐ray diffraction and nitrogen physisorption. Iron oxide shows significant changes in the reducibility by hydrogen compared to comparable bulk iron oxide phases. Partially reduced iron oxides within the mesoporous host were characterized by X‐ray absorption spectroscopy and SQUID measurements. 相似文献
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有序纳米结构材料是一类具有广泛应用前景的新材料,在分离、催化、传感器等领域的应用潜力巨大。近年来,利用溶致液晶模板合成纳米结构颗粒和薄膜材料的研究取得了一系列重要进展,包括新纳米结构金属和半导体材料的合成、由过渡金属水合物与表面活性剂构建的新液晶体系、溶致液晶与其它模板结合制备具有多级孔结构的新材料、影响液晶体系及纳米结构材料有序性与稳定性的关键因素、以及纳米结构形成机理等方面的内容。本文就上述几个方面的近期研究成果进行了总结与综述,并展望了利用溶致液晶模板合成纳米结构材料需要进一步深入开展的内容,有助于化学、化学工程和材料科学等领域的相关研究工作。 相似文献
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纳米金属氧化物的制备及应用研究的若干进展 总被引:75,自引:0,他引:75
综述了氧化物及复合氧化物纳米晶的各种制备方法及特点 ,重点介绍了有机配合物前驱体法 聚乙二醇法、明胶法和硬脂酸法制备氧化物纳米晶的原理、特点以及在磁性材料、电磁波吸收材料、催化剂和塑料改性方面的若干应用 相似文献
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有机电致发光技术在通讯、信息、显示和照明等领域显现出巨大的商业应用前景, 十几年来一直是光电信息领域的研究热点之一。相对于无机电致发光材料,有机电致发光材料具有许多优点。近年来,三苯基膦氧基团在合成高性能有机电致发光材料方面的研究吸引了大批研究者的关注。由于磷原子自身性质,可以形成5个共价键,所以膦氧基团极易和其他基团连接形成以其为核的衍生物。由于氧原子具有很强的电负性,这就使膦氧结构高度极化并具有强的吸电子性。吸电子的膦氧基团连接苯环形成的三苯基膦氧单元也具有较强的吸电子性,其对所形成的化合物的能级结构也会产生明显影响。本文从材料合成的角度综述了三苯基膦氧基团在合成高性能有机电致发光材料中的应用方面所取得的最新研究进展,重点介绍了三苯基膦氧基团在合成高性能磷光二极管主体材料、电子传输材料和单分子电致发光材料等方面的应用。最后讨论了三苯基膦氧基团在上述领域应用过程中所存在的问题和功能拓展方向,并对下一步需要研究的热点问题作了展望。 相似文献
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This account provides an overview of current research activities that focus on the synthesis and applications of nanomaterials from noble metal (e.g., Au, Ag, Pd) and iron oxide (Fe3O4) hybrids. An introduction to the synthetic strategies that have been developed for generating M–Fe3O4 nanomaterials with different novel structures is presented. Surface functionalization and bioconjugation of these hybrid nanoparticles and nanocomposites are also reviewed. The utilization of the advantageous properties of both noble metals and iron oxide for a variety of applications, such as theranostics, gene delivery, biosensing, cell sorting, bioseparation, and catalysis, is discussed and highlighted. Finally, future trends and perspectives of these sophisticated nanocomposites are outlined. The fundamental requirements underpinning the effective preparation of M–FexOy hybrid nanomaterials shed light on the future development of heterogeneous catalysts, nanotheranostics, nanomedicines, and other chemical technologies. 相似文献
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This article reviews and summarizes work recently performed in this laboratory on the synthesis of advanced transparent conducting oxide nanopowders by the use of plasma. The nanopowders thus synthesized include indium tin oxide (ITO), zinc oxide (ZnO) and tin-doped zinc oxide (TZO), aluminum-doped zinc oxide (AZO), and indium-doped zinc oxide (IZO). These oxides have excellent transparent conducting properties, among other useful characteristics. ZnO and TZO also has photocatalytic properties. The synthesis of these materials started with the selection of the suitable precursors, which were injected into a non-transferred thermal plasma and vaporized followed by vapor-phase reactions to form nanosized oxide particles. The products were analyzed by the use of various advanced instrumental analysis techniques, and their useful properties were tested by different appropriate methods. The thermal plasma process showed a considerable potential as an efficient technique for synthesizing oxide nanopowders. This process is also suitable for large scale production of nano-sized powders owing to the availability of high temperatures for volatilizing reactants rapidly, followed by vapor phase reactions and rapid quenching to yield nano-sized powder. 相似文献
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Dr. Sher Alam Chokkalingam Anand Dr. S. M. J. Zaidi Talapaneni Siddulu Naidu Dr. Salem S. Al‐Deyab Prof. Ajayan Vinu 《化学:亚洲杂志》2011,6(3):834-841
Here, we report the results of our detailed study on the fabrication of iron oxide magnetic nanoparticles confined in mesoporous silica KIT‐6 with a 3D structure and large, tunable pore diameters. It was confirmed by XRD, nitrogen adsorption, high‐resolution (HR) TEM, and magnetic measurements that highly dispersed iron oxide nanoparticles are occupied inside the mesochannels of KIT‐6. We also demonstrated that the size of the iron oxide nanoparticle can be controlled by simply changing the pore diameter of the KIT‐6 and the weight percentage of the iron oxide nanoparticles. The effect of the weight percentage and size of the iron oxide nanoparticles, and the textural parameters of the support on the magnetic properties of iron oxide/KIT‐6 has been demonstrated. The magnetization increases with decreasing iron content in the pore channels of KIT‐6, whereas coercivity decreases for the same samples. Among the KIT‐6 materials studied, KIT‐6 with 7.5 wt % of iron showed the highest saturation magnetic moment and magnetic remanence. However, all the samples register a coercivity of around 2000 Oe, which is generally observed for the hard magnetic materials. In addition, we have found a paramagnetic‐to‐superparamagnetic transition at low temperature for samples with different iron content at low temperature. The cause for this exciting transition is also discussed in detail. Magnetic properties of the iron oxide loaded KIT‐6 were also compared with pure iron oxide and iron oxide loaded over SBA‐15. It was found that iron oxide loaded KIT‐6 showed the highest magnetization due to its 3D structure and large pore volume. The pore diameter of the iron oxide loaded KIT‐6 support also plays a critical role in controlling the magnetization and the blocking temperature, which has a direct relation to the particle diameter and increases from 48 to 63 K with an increase in the pore diameter of the support from 8 to 11.3 nm. 相似文献
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Xiaoxiao Zheng Rongli Zhai Zihao Zhang Baoqing Zhang Jiangwei Liu Aamir Razaq Muhammad Ashfaq Ahmad Rizwan Raza Muhammad Saleem Syed Rizwan Syed Hassan Mujtaba Jafri Hu Li Raffaello Papadakis 《Molecules (Basel, Switzerland)》2022,27(6)
Composite materials and their applications constitute a hot field of research nowadays due to the fact that they comprise a combination of the unique properties of each component of which they consist. Very often, they exhibit better performance and properties compared to their combined building blocks. Graphene oxide (GO), as the most widely used derivative of graphene, has attracted widespread attention because of its excellent properties. Abundant oxygen-containing functional groups on GO can provide various reactive sites for chemical modification or functionalization of GO, which in turn can be used to develop novel GO-based composites. This review outlines the most recent advances in the field of novel dyes and pigments encompassing GO as a key ingredient or as an important cofactor. The interactions of graphene with other materials/compounds are highlighted. The special structure and unique properties of GO have a great effect on the performance of fabricated hybrid dyes and pigments by enhancing the color performance of dyes, the anticorrosion properties of pigments, the viscosity and rheology of inks, etc., which further expands the applications of dyes and pigments in dyeing, optical elements, solar-thermal energy storage, sensing, coatings, and microelectronics devices. Finally, challenges in the current development as well as the future prospects of GO-based dyes and pigments are also discussed. This review provides a reference for the further exploration of novel dyes and pigments. 相似文献
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Sher Alam Dr. Chokkalingam Anand Kripal Singh Lakhi Prof. Jin‐Ho Choy Wang Soo Cha Dr. Ahmed Elzhatry Prof. Salem S. Al‐deyab Prof. Yutaka Ohya Prof. Ajayan Vinu 《Chemphyschem》2014,15(16):3440-3443
The preparation of size‐controllable Fe2O3 nanoparticles grown in nanoporous carbon with tuneable pore diameters is reported. These hybrid materials exhibit strong non‐linear magnetic properties and a magnetic moment of approximately 229 emu g?1, which is the highest value ever reported for nanoporous hybrids, and can be attributed to the nanosieve effect and the strong interaction between the nanoparticles and the carbon walls. 相似文献
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Shilin Liu Jinping Zhou Lina Zhang Jianguo Guan Jianbo Wang 《Macromolecular rapid communications》2006,27(24):2084-2089
Summary: A polymer‐iron oxide nanocomposite film has been successfully synthesized by using a microporous regenerated cellulose film as template and aqueous ferrous chloride as precursor. The nanocomposite film was investigated with XRD, XPS, SEM, TEM, and VSM. The nanoparticles synthesized in situ were disk‐shaped with a mean diameter of ≈24 and thicknesses of 2.5–3.5 nm. For the first time, the nanodisks were well aligned in the cellulose matrix to form an ordered multibilayer structure by the shrinkage of the hybrid film while drying. The nanocomposite film displayed anisotropic magnetic properties as a result of the alignment of magnetic nanodisks. This work provides a novel and facile method for template synthesis of nanoparticles and aligned nanocomposites.
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One‐Pot Synthesis of Carbon‐Coated Nanostructured Iron Oxide on Few‐Layer Graphene for Lithium‐Ion Batteries 下载免费PDF全文
Dr. Zhenyu Sun Dr. Edyta Madej Dr. Christian Wiktor Ilya Sinev Prof. Roland A. Fischer Prof. Gustaaf van Tendeloo Prof. Martin Muhler Prof. Wolfgang Schuhmann Dr. Edgar Ventosa 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(45):16154-16161
Nanostructure engineering has been demonstrated to improve the electrochemical performance of iron oxide based electrodes in Li‐ion batteries (LIBs). However, the synthesis of advanced functional materials often requires multiple steps. Herein, we present a facile one‐pot synthesis of carbon‐coated nanostructured iron oxide on few‐layer graphene through high‐pressure pyrolysis of ferrocene in the presence of pristine graphene. The ferrocene precursor supplies both iron and carbon to form the carbon‐coated iron oxide, while the graphene acts as a high‐surface‐area anchor to achieve small metal oxide nanoparticles. When evaluated as a negative‐electrode material for LIBs, our composite showed improved electrochemical performance compared to commercial iron oxide nanopowders, especially at fast charge/discharge rates. 相似文献
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所谓凝聚态,一般意义上是指液态和固态,而凝聚态化学,即是在固相和液相中的各种化学过程。在无机材料,特别是无机纳米与多孔材料的合成制备中,凝聚态化学过程贯穿其中,几乎无处不在。在固相材料合成过程中,通过液相中的各种化学反应以获得目标固体材料的所需组分和物相,也许就是无机材料合成中一个最基本的凝聚态化学问题;而多孔如微孔或介孔材料合成中,更涉及伴随组分和物相形成过程中的孔结构形成与调控;进一步,在制备面向实际应用如催化剂和药物载体时,则在以上的各项要求之外,还必须考虑材料的表面活性位、缺陷等关键因素,以及颗粒尺寸、分散性和形貌等几何和物理特性。本文以无机氧化物为对象,讨论了无机材料在凝聚态化学合成过程中的几个侧面,包括纳米颗粒和粉体的化学合成方法,多孔材料的合成和多孔复相结构的合成调控,以及多级孔结构沸石的合成制备与催化性能,以期能加深对材料合成中凝聚态化学过程的认识,并期待以凝聚态化学为指导,进一步推动无机材料特别是纳米多孔材料合成的发展。 相似文献
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Sonochemistry uses ultrasound to improve or modify chemical reactions. Sonochemistry occurs when the ultrasound causes chemical effects on the reaction system, such as the formation of free radicals, that intensify the reaction. Many studies have investigated the synthesis of nanomaterials by the sonochemical method, but there is still very limited information on the detailed characterization of these physicochemical and morphological nanoparticles. In this comprehensive review, recent advances in the sonochemical synthesis of nanomaterials based on iron oxide nanoparticles (Fe3O4NP), gold nanoparticles (AuNP) and iron oxide-coated gold nanoparticles (Fe3O4@Au NP) are discussed. These materials are the most studied materials for various applications, such as medical and commercial uses. This review will: (1) address the simple processing and observations on the principles of sonochemistry as a starting point for understanding the fundamental mechanisms, (2) summarize and review the most relevant publications and (3) describe the typical shape of the products provided in sonochemistry. All in all, this review’s main outcome will provide a comprehensive overview of the available literature knowledge that promotes and encourages future sonochemical work. 相似文献