Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

Liu, Jian‐Wei; Liang, Hai‐Wei; Yu, Shu‐Hong

doi:10.1021/cr200347w

Cited by 266 publications

(187 citation statements)

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“…[1][2][3][4] Such hierarchical architectures have potentially tunable electronic, optical and magnetic properties, which promise various applications ranging from catalysis to optoelectronics. A mesocrystal (MC), which was first introduced by Cölfen in the early years of 2000s, is defined as a superstructure consisting of nanoparticles on the scale of several hundred nanometers to micrometers.…”

Section: Introductionmentioning

confidence: 99%

Metal oxide mesocrystals with tailored structures and properties for energy conversion and storage applications

Tachikawa

Majima

2014

NPG Asia Mater

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Mesocrystals (MCs) are superstructures with a crystallographically ordered alignment of nanoparticles. Owing to their organized structures, MCs posses some unique characteristics such as a high surface area, pore accessibility, and good electronic conductivity and thermal stability; thus, MCs could be beneficial for many areas of research and application. This review begins with a description of the common synthesis strategies for, and characterization and fundamental properties of metal oxide MCs. Newly developed analytical methods (that is, photoconductive atomic force microscopy and single-molecule, single-particle fluorescence microscopy) for unraveling the charge transport and photocatalytic properties of individual MCs are then introduced. Further, recent developments in the applications of various metal oxide MCs, especially in the fields of energy conversion and storage, are also reviewed. Finally, several perspectives in terms of future research on MCs are highlighted. NPG Asia Materials (2014) 6, e100; doi:10.1038/am.2014.21; published online 16 May 2014 Keywords: energy storage; mesocrystal; metal oxide; photocatalysis; solar energy conversion; superstructure INTRODUCTIONThe self-assembly of nanoparticle building blocks into highly ordered superstructures is one of the actively pursued research topics in materials science and technology. 1-4 Such hierarchical architectures have potentially tunable electronic, optical and magnetic properties, which promise various applications ranging from catalysis to optoelectronics. A mesocrystal (MC), which was first introduced by Cölfen in the early years of 2000s, is defined as a superstructure consisting of nanoparticles on the scale of several hundred nanometers to micrometers. [5][6][7][8][9][10][11] In contrast to the classical mechanism of atom/ ion-mediated growth of a single crystal, the particle-mediated growth mechanisms of MCs are termed as non-classical crystallization (Figure 1). This definition has been developed in recent years, where MCs are defined entirely according to their structures rather than their formation mechanism. 12 In this decade, a variety of MCs of metal oxides (for example, TiO 2 , 13-23 ZnO, [24][25][26][27][28][29][30][31][32][33][34] Among metal oxides, TiO 2 is used in many applications that deal with environmental and energy problems (for example, photodegradation of pollutants, 67 water splitting for H 2 evolution, 68 dyesensitized solar cells 68 and lithium-ion batteries 69 ) owing to its

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Section: Introductionmentioning

confidence: 99%

Metal oxide mesocrystals with tailored structures and properties for energy conversion and storage applications

Tachikawa

Majima

2014

NPG Asia Mater

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“…Moreover, 1D electrocatalysts are easier to assemble into 2D or 3D network, improving structure stability. It is worth mentioning that our group has done many pioneering works on the assembly of nanowires (NWs) [36]. Among the reported methods [16,37−40], sacrificial template method based on galvanic replacement reaction is facile, general, effective and applicable to prepare 1D structure electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

A mixed-solvent route to unique PtAuCu ternary nanotubes templated from Cu nanowires as efficient dual electrocatalysts

et al. 2016

Sci. China Mater.

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ical [2].Forming Pt-based alloys with transi tion metal is a potent strategy to remarkably reduce the usage of noble metal, and therefore enhance the catalytic activity [8−19]. For alloy catalysts, the differe nt arrangements of dissimilar atoms on the surface or subsurface could modify the electronic structure [20,21] , commonly show extraordinary electrocatalytic performance. Coupling such shape-controlled synthesis with post-t reatments is an effective strategy to prepare effective and highly active catalysts. As a general post-treatment, acid leaching is the main method [29−32] to form active and rough skeleton surface. Compared with other post-treatments, acid leaching has the following advantages: (a) acid can remove some specific surfactants used in soft-template synthesis; (b) acid leaching does not decrease the dispersing ability; (c) acid leaching is milder, simpler and more practical [32,33].Furthermore, compared with zero-dimensional (0D) materials, one-dimensional (1D) materials are thought to alleviate all natural drawbacks of 0D materials for enhancing stability. The Ostwald ripening [34], support break-A BSTRACT Forming alloys with transition metal remarkably decreases the u sage of noble metal and offers benefits for electrocatalysis. Here we introduced a mixed-solvent strategy to synthesize unique PtAuCu ternary nanotubes (NTs) with porous and rough surface, using high quality Cu nanowires (NWs) as the partial sacrificial templates. We found that Au plays a key role in the enhancement of e lectrocatalytic performance for both methanol oxidation reaction (MOR) and formic acid oxidation reaction (FAOR). The mass activities of PtAuCu NTs after acid leaching for MOR and FAOR reach 1698.8 mA mg

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“…14 As known, the thickness of films has certain influence on the permeation performance [51,52], so we chose TNF-GO0.5% composites as model to further study the effects of membranes thickness on the filtration properties. Since the thickness of TNF-GO films can be controlled facilely just through using different amount of TNF-GO composites, three dosages of composites (30, 50 and 80 mg) are investigated and the corresponding TNF membranes are still used as control samples.…”

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confidence: 99%

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

Wang

et al. 2017

Journal of Hazardous Materials

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Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance, Journal of Hazardous Materials http://dx.doi.org/10.1016/j.jhazmat. 2016.11.077 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights Graphene oxide embedded titanate fiber films with good processability are prepared  The content of graphene oxide sheets and thickness of films can be adjusted easily  Embedded graphene oxide sheets improve the filtration property of fibrous films  Such composite films also exhibit enhanced selectivity performance. Abstract 3Graphene oxide (GO)-embedded titanate nanofiber (TNF) membranes with improved filtration performance are prepared successfully by a two-step method including electrostatic assembly of GO and TNFs into hybrids and subsequent processing of them into membranes by vacuum filtration. The embedded contents of GO sheets in films and thickness of as-assembled films can be adjusted facilely, endowing such composite films with good processability. Owing to the skilful introduction of GO sheets, the pore and/or channel structures in these hybrid membranes are modified. By treating different dye solutions (Direct Yellow and Direct Red), the filtration properties of these membranesshow that the introduction of certain amount of GO sheets efficiently improve the separation performance of the membranes. Interestingly, these GO-embedded TNF membranes also display superior selective separation performance on filtrating the mixture solutions of such two dyes, making these hierarchical membranes more flexible and versatile in water treatment areas.

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Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

Cited by 266 publications

References 265 publications

Metal oxide mesocrystals with tailored structures and properties for energy conversion and storage applications

Metal oxide mesocrystals with tailored structures and properties for energy conversion and storage applications

A mixed-solvent route to unique PtAuCu ternary nanotubes templated from Cu nanowires as efficient dual electrocatalysts

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

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