Polymorphology formation of Cu2O: A microscopic understanding of single crystal growth from both thermodynamic and kinetic models

Zhao, Xu; Bao, Zeyao; Sun, Congting; Xue, Dongfeng

doi:10.1016/j.jcrysgro.2008.09.081

Cited by 137 publications

(89 citation statements)

References 14 publications

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“…Among the morphology-controlled syntheses of inorganic oxides, cuprous oxide (Cu 2 O) has been widely investigated due to its ease of preparation. [4][5][6][7][8] The morphology-dependent photocatalytic and antibacterial properties of Cu 2 O were also studied recently. Figure 1 shows the X-ray diffraction (XRD) patterns of Ag 2 O prepared using different amounts of AgNO 3 with 1.0/ 40/10 molar ratios of AgNO 3 /pyridine/NaOH, respectively.…”

Section: -3mentioning

confidence: 99%

Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Kim¹,

Kim²,

Park³

et al. 2011

Bulletin of the Korean Chemical Society

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The selective synthesis of inorganic oxides with unique morphology has attracted considerable interest because of their morphology-dependent properties and applications. 1-3Efforts on most synthetic inorganic oxides have been focused on preparing a stable morphology rather than providing a strategy for producing various morphologies. Therefore, well-controlled methods for synthesizing inorganic oxides with a systematic evolution of morphology should be developed by adjusting the experimental conditions. Among the morphology-controlled syntheses of inorganic oxides, cuprous oxide (Cu 2 O) has been widely investigated due to its ease of preparation.4-8 The morphology-dependent photocatalytic and antibacterial properties of Cu 2 O were also studied recently.9-11 Although Cu 2 O and silver oxide (Ag 2 O) have similar cubic crystal structures, relatively little is known about the morphology-controlled synthesis and physical properties of Ag 2 O.12,13 To date, a study of the morphology-dependent antibacterial effect of Ag 2 O has reported only for different polyhedral shapes including octahedrons, truncated octahedrons, and cubes.14 This study provided a simple precipitation method for the morphological evolution of Ag 2 O from cubes to octapods. Furthermore, the morphology-dependent antibacterial activity of Ag 2 O against E. coli was also examined.Ag 2 O products with various morphologies were prepared from a silver-pyridine (Py) complex solution. Figure 1 shows the X-ray diffraction (XRD) patterns of Ag 2 O prepared using different amounts of AgNO 3 with 1.0/ 40/10 molar ratios of AgNO 3 /pyridine/NaOH, respectively. All peaks corresponded to those reported for bulk Ag 2 O (JCPDS 12-0793, a = 0.4736 nm) with a cubic structure and impurities. Figure 2 shows scanning electron microscopy (SEM) images of Ag 2 O prepared with different amounts of AgNO 3 . At 2.5 mL of AgNO 3 , Ag 2 O formed a regular cubic shape, as shown in Figure 2(a). The mean length of each side was 600 nm. At 5.0 mL of AgNO 3 , Ag 2 O formed a cubic shape, and the mean length of each side was 700 nm. Void spaces were created at the center of the cubic crystal planes, as shown in Figure 2 (b). When the amount of AgNO 3 was increased to 7.5 mL, the void spaces at the center of the cubic crystal planes increased further, as shown in Figure 2(c). As the amount of AgNO 3 was increased up to 20 mL, octapods with eight identical Ag 2 O horns were formed (Figure 2(d)).

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Section: -3mentioning

confidence: 99%

Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Kim¹,

Kim²,

Park³

et al. 2011

Bulletin of the Korean Chemical Society

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“…In order to provide all necessary requirements imposed for semiconductor materials for PEC applications, a variety of Cu 2 O structures (wires, cubes, polyhedral, flower-like structure, etc.) [10][11][12][13] [9,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of copper oxides films via anodic oxidation of copper foil followed by thermal reduction

Zimbovskiy

Gavrilov

Чурагулов

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.Copper oxides films were successfully synthesized via anodic oxidation of copper foil at various conditions followed by thermal reduction of oxidized samples in inert nitrogen atmosphere. The morphology and phase composition of final and intermediate products were determined by scanning electron microscopy, X-ray diffraction and Raman spectroscopy techniques. Optimal synthetic conditions of Cu 2 O films on copper foil surface were established.

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“…Changing the reaction rate can reduce or increase the supersaturation of Cu 2 O, thus controlling the crystallization process of Cu 2 O. According to the chemical bonding theory of single crystal growth, the thermodynamic stable morphology of Cu 2 O is octahedron [27,28]. The change of crystallization kinetics leads to the formation of kinetics-stable morphologies of cube and truncated octahedron (Figure 2b).…”

Section: +mentioning

confidence: 99%

Nanofabrication strategies for advanced electrode materials

Chen

Xue

2017

Nanofabrication

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Advanced energy storage devices, i.e., Li-ion battery, supercapacitor, need high electroactive metal oxide materials with stable structure during charging/ discharging cycling [1][2][3]. However, metal oxide electrode materials often suffer from low conductivity, and slow ion diffusion rate during electrochemical redox reaction. In recent years, lots of efforts are done to design nanostructured materials to enhance their function. When downsizing to nanosize, the electroactive areas of materials are increased and ion/electron diffusion length is shortened, and therefore specific capacitance of active materials is significantly enhanced [4][5][6]. For example, 3D holey-graphene/niobia composite architectures have been designed to show ultrahigh-rate energy storage performance [7]. The highly interconnected graphene network in the 3D architecture shows excellent electron transport properties, while its hierarchical porous structure enables rapid ion transport. Although the nanostructured materials have shown extraordinary promise for electrochemical energy storage, most of the existing synthesis techniques require multistep and laborious procedures [8,9]. The dual pressure of energy needs and environmental requirements in society demand the rapid screening of exceptional performance materials to shorten R&D of advanced energy storage devices. As shown in Figure 1a, R&D of electrode materials mainly includes structure & component design, materials synthesis and performance evaluation. During these processes, materials synthesis often need longer time and complex equipments, which increase the finding time of new electrode materials. The development of easy and fast nanofabrication strategy can accelerate finding rate of new electrode materials in laboratory (Figure 1b). Furthermore, with creative design idea, the material synthesis process can be replaced or fused into one structure-performance process (Figure 1c), which not only accelerate the finding rate of new electrode materials, but also decrease the cost of searching new electrode materials. Abstract: The development of advanced electrode materials for high-performance energy storage devices becomes more and more important for growing demand of portable electronics and electrical vehicles. To speed up this process, rapid screening of exceptional materials among various morphologies, structures and sizes of materials is urgently needed. Benefitting from the advance of nanotechnology, tremendous efforts have been devoted to the development of various nanofabrication strategies for advanced electrode materials. This review focuses on the analysis of novel nanofabrication strategies and progress in the field of fast screening advanced electrode materials. The basic design principles for chemical reaction, crystallization, electrochemical reaction to control the composition and nanostructure of final electrodes are reviewed. Novel fast nanofabrication strategies, such as burning, electrochemical exfoliation, and their basic principles are also summarized. More im...

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Polymorphology formation of Cu2O: A microscopic understanding of single crystal growth from both thermodynamic and kinetic models

Cited by 137 publications

References 14 publications

Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Synthesis of copper oxides films via anodic oxidation of copper foil followed by thermal reduction

Nanofabrication strategies for advanced electrode materials

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Polymorphology formation of Cu2O: A microscopic understanding of single crystal growth from both thermodynamic and kinetic models

Cited by 137 publications

References 14 publications

Morphological Evolution of Ag2O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Morphological Evolution of Ag2O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Synthesis of copper oxides films via anodic oxidation of copper foil followed by thermal reduction

Nanofabrication strategies for advanced electrode materials

Contact Info

Product

Resources

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Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities

Morphological Evolution of Ag₂O Microstructures from Cubes to Octapods and Their Antibacterial Activities