共查询到19条相似文献,搜索用时 78 毫秒
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石墨烯的制备研究进展 总被引:2,自引:0,他引:2
近年来, 石墨烯以其独特的结构和优异的性能, 在化学、物理和材料学界引起了广泛的研究兴趣. 人们已经在石墨烯的制备方面取得了积极的进展, 为石墨烯的基础研究和应用开发提供了原料保障. 本文大量引用近三年最新参考文献, 综述了石墨烯的制备方法: 物理方法(微机械剥离法、液相或气相直接剥离法)与化学法(化学气相沉积法、晶体外延生长法、氧化?还原法), 并详细介绍了石墨烯的各种修饰方法. 分析比较了各种方法的优缺点, 指出了石墨烯制备方法的发展趋势. 相似文献
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随着石油、煤炭和天然气等化石能源的枯竭,氢能在工业生产和交通运输等方面展现了愈加关键的作用。氢能产业对储氢装置在生产、储运、加注和使用全链条过程中提出了“耐高压、高密封及燃爆安全”等性能的全面要求,高灵敏、快速响应、高选择性和高稳定性的氢气传感器是保障氢能系统安全的重要检测装备。高性能氢气传感器成功制备与应用的关键是研发新型的氢敏材料。石墨烯和MXenes是极具代表性的二维平面纳米材料,不仅具有超高的电学和力学性能,而且易于进行功能化修饰且不影响其固有性能,因此在氢气传感领域具有极大的应用潜力。本文综述了石墨烯和MXenes的基本结构、类型和合成方法,总结了其在氢气传感器中的应用研究进展,指出了存在的问题并提出了解决方案,还对氢气传感器未来的研究方向进行了展望。 相似文献
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本文采用密度泛函理论,研究了边缘氧化扶手椅型石墨烯纳米带(AGNRs)的电子结构和相对稳定性.结果表明,边缘氧化的AGNRs要比边缘氢化的纳米带稳定.由于氧原子比碳原子具有较大的电负性,边缘氧化AG-NRs表现出金属性能带结构.此外,氧饱和AGNRs比氢饱和AGNRs对电场作用更为敏感,这将有助于在带隙工程中实现其电子结构剪裁. 相似文献
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石墨烯的制备及其在能源方面的应用研究进展 总被引:1,自引:0,他引:1
近年来,石墨烯以其独特的二维结构和许多优异的性能吸引了物理、化学、材料等领域科学家的关注,并得到了多方面研究。至今,石墨烯的制备方法有多种,其研究取得了一定的进展,为石墨烯的理论研究和实践应用奠定了基础。本文综述了石墨烯的制备方法(固相法、液相法和气相法)及其在能源方面的应用研究现状,并比较了各种方法的优缺点。最后,对石墨烯的未来发展作了展望。 相似文献
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石墨烯在太阳能电池中的应用 总被引:2,自引:0,他引:2
近年来, 石墨烯以其独特的结构和优异的材料性能而广泛应用于物理、化学及材料学等领域. 其中被寄予厚望的应用之一是高光电转换效率的新一代太阳能电池. 本文综述了石墨烯应用于太阳能电池领域的发展现状, 包括石墨烯应用于太阳能电池透光导电极、工作电极以及电池中电子受体材料等方面, 并指出了其今后的发展趋势. 相似文献
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Graphene is a wonder material with the ultimate smallest thickness that is readily accessible to various approaches for engineering its excellent properties. Graphene doping is an efficient way to tailor its electric properties and expand its applications. This topic covers wide research fields and has been developing rapidly. This article presents a broad and comprehensive overview of the developments in the preparation and applications of doped graphene including doping methods, doping levels, doping effect and types of heteroatoms. Very recent advances are also presented. In addition, existing problems in terms of achieving greater control over and further developments of doped graphene are also discussed. 相似文献
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Sicheng Wu Jingxin Mo Yachao Zeng Yuan Wang Aditya Rawal Jason Scott Zhen Su Wenhao Ren Sheng Chen Kaixuan Wang Wei Chen Yongzhi Zhang Chuan Zhao Xianjue Chen 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(12)
An unprecedented microwave‐based strategy is developed to facilitate solid‐phase, instantaneous delamination and decomposition of graphite fluoride (GF) into few‐layer, partially fluorinated graphene. The shock reaction occurs (and completes in few seconds) under microwave irradiation upon exposing GF to either “microwave‐induced plasma” generated in vacuum or “catalyst effect” caused by intense sparking of graphite at ambient conditions. A detailed analysis of the structural and compositional transformations in these processes indicates that the GF experiences considerable exfoliation and defluorination, during which sp2‐bonded carbon is partially recovered despite significant structural defects being introduced. The exfoliated fluorinated graphene shows excellent electrochemical performance as anode materials in potassium ion batteries and as catalysts for the conversion of O2 to H2O2. This simple and scalable method requires minimal energy input and does not involve the use of other chemicals, which is attractive for extensive research in fluorine‐containing graphene and its derivatives in laboratories and industrial applications. 相似文献
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独特的二维结构和优异的理化性能使得石墨烯迅速成为物理、化学以及材料等领域的研究热点。近年来,由二维结构的石墨烯组装形成的石墨烯宏观体材料,因具有本征石墨烯固有的理化性能又具有较大实际比表面积、连通的纳米通道以及良好的力学性能,使其在光学器件、电子器件以及环境治理等领域备受关注。结合当前研究热点,主要概述了石墨烯宏观体的制备及其在超级电容器、光电器件以及环境修复与治理等领域中的应用,简要地评述了石墨烯宏观体材料在制备及应用中面临的挑战,初步指出了未来石墨烯宏观体的发展趋势。 相似文献
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Rekha Narayan Ji Eun Kim Ju Young Kim Kyung Eun Lee Sang Ouk Kim 《Advanced materials (Deerfield Beach, Fla.)》2016,28(16):3045-3068
The discovery and relevant research progress in graphene oxide liquid crystals (GOLCs), the latest class of 2D nanomaterials exhibiting colloidal liquid crystallinity arising from the intrinsic disc‐like shape anisotropy, is highlighted. GOLC has conferred a versatile platform for the development of novel properties and applications based on the facile controllability of molecular scale alignment. The first part of this review offers a brief introduction to LCs, including the theoretical background. Particular attention has been paid to the different types of LC phases that have been reported thus far, such as nematic, lamellar and chiral phases. Several key parameters governing the ultimate stability of GOLC behavior, including pH and ionic strength of aqueous dispersions are highlighted. In a relatively short span of time since its discovery, GOLCs have proved their remarkable potential in a broad spectrum of applications, including highly oriented wet‐spun fibers, self‐assembled nanocomposites, and architectures for energy storage devices. The second part of this review is devoted to an exclusive overview of the relevant applications. Finally, an outlook is provided into this newly emerging research field, where two well established scientific communities for carbon nanomaterials and liquid crystals are ideally merged. 相似文献