Journal ArticleDOI
Nanomaterials of high surface energy with exceptional properties in catalysis and energy storage
TLDR
This critical review presents a review of the progress made for producing shape-controlled synthesis of nanomaterials of high surface energy using electrochemical and wet chemistry techniques and discusses important nanommaterials such as nanocrystal catalysts based on Pt, Pd, Au and Fe, metal oxides TiO(2) and SnO( 2), as well as lithium Mn-richMetal oxides.Abstract:
The properties of nanomaterials for use in catalytic and energy storage applications strongly depends on the nature of their surfaces. Nanocrystals with high surface energy have an open surface structure and possess a high density of low-coordinated step and kink atoms. Possession of such features can lead to exceptional catalytic properties. The current barrier for widespread industrial use is found in the difficulty to synthesise nanocrystals with high-energy surfaces. In this critical review we present a review of the progress made for producing shape-controlled synthesis of nanomaterials of high surface energy using electrochemical and wet chemistry techniques. Important nanomaterials such as nanocrystal catalysts based on Pt, Pd, Au and Fe, metal oxides TiO2 and SnO2, as well as lithium Mn-rich metal oxides are covered. Emphasis of current applications in electrocatalysis, photocatalysis, gas sensor and lithium ion batteries are extensively discussed. Finally, a future synopsis about emerging applications is given (139 references).read more
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High-index faceted Au nanocrystals with highly controllable optical properties and electro-catalytic activity
TL;DR: A new and naturally abundant mild reducing agent, tannic acid, is introduced to improve the seed-mediated growth method for the synthesis of elongated tetrahexahedral Au nanocrystals enclosed with high-index planes, at room-temperature.
Journal ArticleDOI
In situ identification of crystal facet-mediated chemical reactions on tetrahexahedral gold nanocrystals using surface-enhanced Raman spectroscopy.
Xiufeng Lang,Tingting You,Penggang Yin,Enzhong Tan,Yan Zhang,Yi-Fan Huang,Hongping Zhu,Bin Ren,Lin Guo +8 more
TL;DR: It is demonstrated that the tetrahexahedral gold nanocrystals (THH) with exposed {520} facets give highly enhanced Raman signals from molecules at the interface, permitting in situ observation of chemical transformation from para-aminothiophenol (PATP) to 4,4'-dimercaptoazobenzene (DMAB).
Journal ArticleDOI
Experimental and theoretical approach of nanocrystalline TiO2 with antifungal activity
Valeria M. Longo,Francini C. Picon,Camila Andrade Zamperini,Anderson R. Albuquerque,Julio R. Sambrano,Carlos Eduardo Vergani,Ana Lucia Machado,Juan Andrés,Antônio Carlos Hernandes,José Arana Varela,Elson Longo +10 more
TL;DR: Using a solvothermal method for this research, synthesized nanocrystalline titanium dioxide (nc-TiO 2 ) anatase particles with a mean diameter of 5.4nm and evaluated their potential antifungal effect against planktonic cells of Candida albicans without UV radiation as mentioned in this paper.
Journal ArticleDOI
Hierarchical structures of rutile exposing high-index facets
TL;DR: Recently, shape-controlled synthesis of rutile-type TiO2 with hierarchical structures exposing high-index facets has attracted much research interest due to their importance for both fundamental studies and technological applications as discussed by the authors.
Journal ArticleDOI
Modelling free and oxide-supported nanoalloy catalysts: comparison of bulk-immiscible Pd–Ir and Au–Rh systems and influence of a TiO2 support
Ilker Demiroglu,Tian-E Fan,Tian-E Fan,Ziyou Li,Jun Yuan,Tundong Liu,Laurent Piccolo,Roy L. Johnston +7 more
TL;DR: The relative stabilities of different chemical arrangements of Pd-Ir and Au-Rh nanoalloys (and their pure metal equivalents) are studied, for a range of compositions, for fcc truncated octahedral 38- and 79-atom nanoparticles (NPs).
References
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Journal ArticleDOI
Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology.
TL;DR: A review of gold nanoparticles can be found in this article, where the most stable metal nanoparticles, called gold colloids (AuNPs), have been used for catalysis and biology applications.
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Chemistry and properties of nanocrystals of different shapes.
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
Journal ArticleDOI
Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
TL;DR: A comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals, including a brief introduction to nucleation and growth within the context of metal Nanocrystal synthesis, followed by a discussion of the possible shapes that aMetal nanocrystal might take under different conditions.
Journal ArticleDOI
Anatase TiO(2) single crystals with a large percentage of reactive facets
Hua Gui Yang,Chenghua Sun,Shi-Zhang Qiao,Jin Zou,Gang Liu,Sean C. Smith,Hui-Ming Cheng,Gao Qing Lu +7 more
TL;DR: This work synthesized uniform anatase TiO2 single crystals with a high percentage (47 per cent) of {001} facets using hydrofluoric acid as a morphology controlling agent and demonstrates that for fluorine-terminated surfaces this relative stability is reversed.
Journal ArticleDOI
Battery materials for ultrafast charging and discharging
Byoungwoo Kang,Gerbrand Ceder +1 more
TL;DR: It is shown that batteries which obtain high energy density by storing charge in the bulk of a material can also achieve ultrahigh discharge rates, comparable to those of supercapacitors.