Controlling the Shapes of Silver Nanocrystals with Different Capping Agents

Zeng, Jie; Zheng, Yiqun; Rycenga, Matthew; Tao, Jing; Li, Zhiyuan; Zhang, Qiang; Zhu, Yimei; Xia, Younan

doi:10.1021/ja103655f

Cited by 427 publications

(395 citation statements)

References 25 publications

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“…To date, CAs have played an important role on shape‐controlled synthesis of NCs,137, 138, 139, 140, 141, 142 and there are many successful examples in preparing Cu 2 O NCs 7, 8, 75, 107, 122, 125, 143. We will introduce some classic synthetic routes of Cu 2 O NCs enclosed by low‐index facets.…”

Section: Basic Growth Strategies For Cu2o Polyhedramentioning

confidence: 99%

Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing

2015

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Shape‐dependent catalysis and sensing behaviours are primarily focused on nanocrystals enclosed by low‐index facets, especially the three basic facets ({100}, {111}, and {110}). Several novel strategies have recently exploded by tailoring the original nanocrystals to greatly improve the catalysis and sensing performances. In this Review, we firstly introduce the synthesis of a variety of Cu2O nanocrystals, including the three basic Cu2O nanocrystals (cubes, octahedra and rhombic dodecahedra, enclosed by the {100}, {111}, and {110} facets, respectively), and Cu2O nanocrystals enclosed by high‐index planes. We then discuss in detail the three main facet‐controlled synthetic strategies (deposition, etching and templating) to fabricate Cu2O‐based nanocrystals with heterogeneous, etched, or hollow structures, including a number of important concepts involved in those facet‐controlled routes, such as the selective adsorption of capping agents for protecting special facets, and the impacts of surface energy and active sites on reaction activity trends. Finally, we highlight the facet‐dependent properties of the Cu2O and Cu2O‐based nanocrystals for applications in photocatalysis, gas catalysis, organocatalysis and sensing, as well as the relationship between their structures and properties. We also summarize and comment upon future facet‐related directions.

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Section: Basic Growth Strategies For Cu2o Polyhedramentioning

confidence: 99%

Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing

2015

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“…On the other hand, from the viewpoint of nanofabrication, it has been demonstrated that the size of the produced nanostructures in a colloid system could be decreased by introducing polymeric surfactant molecules to the synthesis system [30,[34][35][36][37][38][39][40]. These polymeric surfactant molecules are suggested to work as stabilizer or capping agents to hamper the further growth of the formed nanospecies, resulting in smaller nanostructures [30,[34][35][36][37][38][39][40]. For example, it has recently been reported that the size of the Ag/AgCl nanoparticles could be decreased with the assistance of polymeric surfactant molecules, poly(vinyl pyrrolidone) [40].…”

Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridmentioning

confidence: 99%

“…For example, it has recently been reported that the size of the Ag/AgCl nanoparticles could be decreased with the assistance of polymeric surfactant molecules, poly(vinyl pyrrolidone) [40]. On the basis of these well-documented understandings [30,[32][33][34][35][36][37][38][39][40] and accompanied by our experimental facts, we suggest that in our system the GO nanosheet, an unconventional amphiphilic polymer, might work as capping agent or stabilizer to hamper the further growth of the Ag/Ag 3 PO 4 nanoparticles, resulting in smaller size of the formed nanostructures. Similar results have been reported in other systems [28][29][30].…”

Section: Synthesis and Characterization Of Ag/ag 3 Po 4 And Go Hybridmentioning

confidence: 99%

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

2012

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An efficient visible-light-driven plasmonic photocatalyst with regard to graphene oxide (GO) hybridized Ag/Ag 3 PO 4 (Ag/ Ag 3 PO 4 /GO) nanostructures has been facilely synthesized via a deposition-precipitation method. The synthesized nanostructures have been characterized by means of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), UV-vis spectra, Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), and Raman spectra. It has been disclosed that compared with the bare Ag/Ag 3 PO 4 nanospecies, the GO hybridized nanostructures display enhanced photocatalytic activity for the photodegradation of methyl orange pollutant under visible-light irradiation. It is suggested that the reinforced charge transfer and the suppressed recombination of electron-hole pairs in Ag/Ag 3 PO 4 /GO, the smaller size of Ag/Ag 3 PO 4 nanospecies in Ag/Ag 3 PO 4 /GO, all of which are the consequences of the hybridization of GO, are responsible for the enhanced photocatalytic performance. The investigation might open up new opportunities to obtain highly efficient Ag 3 PO 4 -based visible-light-driven plasmonic photocatalyst for the photodegradation of organic pollutants.

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“…it can act as a reducing reagent and/or as a capping agent [20][21][22][23]. This capping agent provides the nanoparticles with sufficient electrostatic stabilization to avoid agglomeration for long periods of time.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of CdTe nanocrystals synthesized by a green room temperature solution method

et al. 2015

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These materials exhibit quantum confinement effects when their sizes are comparable with the diameter of the bulk exciton, leading to split the continuum of electronic energy levels into discrete states with an effective band gap blue shifted from that of the bulk [7][8][9].There are two different synthetic methods for producing CdTe nanostructures, the organometallic route and synthesis in an aqueous solution [10][11][12][13]. The organometallic method usually requires hard conditions such as high temperature, toxic reagents and solvents, and a rigorous process for protecting synthesized nanostructures from oxidation, while the aqueous synthesis method requires mild conditions and is a simpler one [14,15]. Compared with organometallic route, aqueous synthesis has many advantages such as biocompatibility, water solubility, environmental friendliness, and low cost [16]. The aqueous synthetic approach allows the resulting nanostructures to be tuned in terms of their size, shape, and structure on the nanometer scale [17]. The capping agent is one of the most important factors in the synthesis of nanostructures. Some of the commonly used methods for surface passivation include protection by self-assembled monolayers, the most popular being thiol-functionalized organics; encapsulation in the water pools of reverse microemulsions; and dispersion in polymer matrixes [18]. The thiol-functionalized organic compounds are highly reactive chemically and pose potential environmental and biological risks. It is well known that capping ligands attached on the nanostructure surface have strong effects on the size, morphology, and compatibility of nanostructures with different chemical mediums [19]. Therefore, it is of great importance to have a proper selection of appropriate capping ligands, which would lead to the desired particle structures. Sodium citrate is one of the most common agents used in the synthesis of metallic and semiconductor nanostructures because Abstract The CdTe nanocrystals were successfully synthesized using a facile room temperature method with non-toxic and environmentally friendly capping agent. The obtained CdTe nanocrystals were characterized by UV-Vis absorption spectroscopy, transmission electron microscopy, and z-scan technique. A photoluminescence peak with full width at half maximum of around 15 nm could be obtained, which indicates a homogeneous and narrow size distribution for the CdTe nanocrystals. The magnitude and sign of the third-order nonlinear refractive index (n 2 ) and nonlinear absorption coefficient (β) of the CdTe nanocrystals were determined by using of the closed-and open-aperture z-scan at different intensities, respectively. The negative sign of n 2 indicated that there is a self-defocusing effect in the sample. The nonlinear refractive index, n 2 , and the nonlinear absorption coefficient, β, were in order of 10 −7 cm 2 W −1 and 10 −2 -10 −3 cmW −1, respectively.

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Controlling the Shapes of Silver Nanocrystals with Different Capping Agents

Cited by 427 publications

References 25 publications

Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing

Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

Nonlinear optical properties of CdTe nanocrystals synthesized by a green room temperature solution method

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Controlling the Shapes of Silver Nanocrystals with Different Capping Agents

Cited by 427 publications

References 25 publications

Facet‐Controlled Synthetic Strategy of Cu2O‐Based Crystals for Catalysis and Sensing

Facet‐Controlled Synthetic Strategy of Cu2O‐Based Crystals for Catalysis and Sensing

Visible-light-driven Ag/Ag3PO4-based plasmonic photocatalysts: Enhanced photocatalytic performance by hybridization with graphene oxide

Nonlinear optical properties of CdTe nanocrystals synthesized by a green room temperature solution method

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Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing

Facet‐Controlled Synthetic Strategy of Cu₂O‐Based Crystals for Catalysis and Sensing