Cupric oxide nanoflowers synthesized with a simple solution route and their field emission

Yu, Ligang; Zhang, Gengmin; Wu, Yue; Bai, Xiaoyong; Guo, Dengzhu

doi:10.1016/j.jcrysgro.2008.03.026

Cited by 85 publications

(40 citation statements)

References 48 publications

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“…Recently, much effort has been devoted to synthesizing unique CuO nanostructures, such as rods (Xu et al 2002), robbons (Liu and Zeng 2004;Gao et al 2009), wires (Su et al 2007), belts (Zhang et al 2008b), sheets (Zheng et al 2007), platelets (Zarate et al 2007), needles (Dar et al 2008), and tubes (Cho and Huh 2008). As one of the novel structures, flower-like CuO was expected to offer some exciting opportunities for some potential applications on electrochemistry (Pan et al 2007), sensors (Teng et al 2008), catalysis (Vaseem et al 2008), and field emission (Yu et al 2008). So far, a variety of approaches to fabricating flower-like CuO nanostructures have been developed, such as hydrothermal Teng et al 2008), solution-immersion (Pan et al 2007), hydrolysis (Zhu et al 2007), microwave-hydrothermal (Volanti et al 2007;Xia et al 2009), chemical precipitation (Zhang et al 2008a), thermal oxidation (Yu et al 2008) and solution-phase route (Yu et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Zou

Zhang

et al. 2011

Bull Mater Sci

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Flower-like CuO nanostructures have been synthesized by cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. Here, CuCl 2 ⋅2H 2 O was used as copper raw material, and sodium hydroxide was used as precipitate. The resulting CuO powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) pattern exhibited the nanocrystalline nature with monoclinic structure for the as-synthesized nanostructures. FESEM images indicated that the flower-like CuO nanostructures are composed of many interconnected nanosheets in size of several micrometres in length and width and 60-80 nm in thickness. The possible formation mechanism of flower-like CuO nanostructures was discussed.

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Section: Introductionmentioning

confidence: 99%

Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Zou

Zhang

et al. 2011

Bull Mater Sci

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“…The anodic and cathodic peak currents both increase linearly with the increase of the square root of the potential scan rate (v 1/2 ) between 20 and 140 mV s -1 (the inset of Fig. 4) with the correlation coefficients of -0.9929 and 0.9999, respectively, indicating that the electrode process is a diffusion-controlled process [35].…”

Section: Resultsmentioning

confidence: 92%

Hydrogen peroxide sensor based on Prussian blue electrodeposited on (3-mercaptopropyl)-trimethoxysilane polymer-modified gold electrode

Zhang

Luo

2010

Bioprocess Biosyst Eng

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A hydrogen peroxide (H(2)O(2)) sensor was developed by electrodepositing Prussian blue (PB) on a gold electrode modified with (3-mercaptopropyl)-trimethoxysilane (MPS) polymer. The characterization of the self-assembled electrode was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The results of electrochemical experiments showed that such constructed sensor had a favorable catalytic ability to reduce H(2)O(2). The MPS film on the modified gold electrode greatly enhanced the pH-adaptive range of PB. Large surface-to-volume ratio property of double-layer 2d-network MPS-modified PB electrode enabled stable and highly sensitive performance of the non-enzymatic H(2)O(2) sensor. The linear range of H(2)O(2) determined is from 2.0 × 10(-6) to 2.0 × 10(-4) mol L(-1) with a correlation coefficient of 0.9991 and a detection limit for H(2)O(2) of 1.8 × 10(-6) mol L(-1). The influences of the potentially interfering substances on the determination of H(2)O(2) were investigated. This modified electrode exhibits a good selectivity and high sensitivity with satisfactory results.

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“…Subsequently, the formed product was rinsed repeatedly with distilled water and absolute ethyl alcohol to remove non-ionic residues and then dried in vacuum. It is worth noting that, in the alkaline solution, the following processes may occur sequentially or simultaneously 28 : the metallic copper was oxidized by hydroperoxides to cupric ion (see Fig. 1a), the Cu 2+ was formed of a complex anion such as [Cu(OH) 4 ] 2À (see Fig.…”

Section: The Formation Process Of Cuo Nanoflowers Electrodementioning

confidence: 99%

“…In this procedure, the nano-CuO originates in the complicated reaction process, according to the following formulae. 28,29 Cu 2þ…”

Section: The Formation Process Of Cuo Nanoflowers Electrodementioning

confidence: 99%

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Facile Synthesis of Hierarchical CuO Nanoflower for Supercapacitor Electrodes

Zheng

Dai

et al. 2016

Journal of Elec Materi

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Three-dimensional CuO nanoflowers were prepared on the surface of flexible Cu foil (CuO@Cu) by a chemical deposition method. The morphology and composition of CuO nanoflowers were examined by scanning electron microscopy and x-ray diffraction spectroscopy, respectively. The electrochemical supercapacitive properties of CuO nanoflowers were investigated by cyclic voltammetry, galvanostatic charge-discharge measurements and electrochemical impedance spectroscopy (EIS). Electrochemical tests indicated that the optimized product showed a high specific capacitance of 284.5 F g À1 at the current density of 0.5 mA cm À2 . EIS analysis indicated that the CuO nanoflowers exhibited good conductivity and very low internal resistance. The cyclability of the electrode demonstrates a 20% loss in capacitance over 1000 cycles. Thus, the results revealed that CuO nanoflower active materials hold the potential for electrochemically stable supercapacitors.

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Cupric oxide nanoflowers synthesized with a simple solution route and their field emission

Cited by 85 publications

References 48 publications

Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Hydrogen peroxide sensor based on Prussian blue electrodeposited on (3-mercaptopropyl)-trimethoxysilane polymer-modified gold electrode

Facile Synthesis of Hierarchical CuO Nanoflower for Supercapacitor Electrodes

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