Synthesis of aligned copper oxide nanorod arrays by a seed mediated hydrothermal method

Liu, Liqing; Hong, Kunquan; Hu, Tengteng; Xu, Mingxiang

doi:10.1016/j.jallcom.2011.09.028

Cited by 51 publications

(25 citation statements)

References 30 publications

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“…Various synthesis methods have been studied on copper oxide nanostructures such as thermal oxidation, hydrothermal [10,11], electrodeposition [12], template assisted [13], RF magnetron sputtering, plasma reduction [14]. Among these synthesis methods, the electrochemical method had a special significance for scientists because direct synthesis of Cu2O nanostructures has been complicated and needed some extra processes.…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical and H2 sensing properties of copper oxide nanowires on glass substrate by anodization

Şişman

Kılınç

Öztürk

2016

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Structural, electrical and H2 sensing properties of copper oxide nanowires on glass substrate by anodization

Şişman

Kılınç

Öztürk

2016

Sensors and Actuators B: Chemical

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“…Cupric oxide, CuO, is an important p-type semiconductor metal oxide with a band gap of 1.0-4.5 eV 2,3 , which is widely used in nano systems such as high temperature superconductors 4 , magnetic storage media 1,5 , solar cells 1,[3][4][5][6][7][8][9] , hydrogen storage materials 7 , batteries 1,2,8 , gas sensors 1-10 , catalysis [2][3][4][5][6][7]9,10 . Up to date, CuO with different morphologies such as nanobelt 1,8 , nanospindle 2 , nanoring 2,4 , nanorod 1,4,6 , nanospherical 8 7,8,9,12,13 methods. One of the approaches to synthesize metal oxide nanostructures is the ball milling or mechanochemical method [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

A green synthesis of copper oxide nanoparticles by mechanochemical method

Tadjarodi¹,

Roshani²

2014

10.5267/j.ccl

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Copper oxide nanoparticles were successfully synthesized by mechanochemical reaction, which is a green, low cost, solvent free, rapid method and followed by calcining treatment. Copper acetate monohydrate and urea were used as reagents and the resulted precursor was calcined at 500 C for 2h in air. The scanning electron microscopy (SEM) revealed the formation of nanoparticles with an average size of about 86 nm. The Fourier transform infrared (FT-IR) spectrum and X-ray powder diffraction (XRD) pattern of the product confirmed all of reflections can be indexed to pure phase of CuO with a monoclinic crystal system. The diffuse reflectance spectrum (DRS) showed a band gap of 1.7 eV.

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“…The maximum growth rate in this experiment was found to be 113 nm/min in the 175 • C sample, which is significantly higher than those of other studies. 21,22,26 The high growth rate in this experiment is attributed to the M-CBD method, which heats the substrate directly and maintains a constant precursor concentration. Our group recently reported the rapid growth of ZnO nanorods using the M-CBD process.…”

Section: Resultsmentioning

confidence: 95%

Effects of Growth Temperature on Cupric Oxide Nanorod Photoelectrodes Using a Modified Chemical Bath Deposition

Ryu

Lee

2014

J. Electrochem. Soc.

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In this study, vertically aligned CuO nanorods were grown on a fluorine-doped tin oxide (FTO) substrate by a modified chemical bath deposition process at various growth temperatures. Field emission gun scanning electron microscopy, X-ray diffraction and UVvisible spectroscopy were used to characterize the morphological, structural and optical properties of the CuO nanorods, respectively. The photoelectrochemical properties of CuO nanorods as a photoelectrode were also measured in aqueous electrolyte solution (1 M KOH) under 1-sun illumination conditions (1.5 AM filter, 100 mW/cm 2 ) with a three-electrode potentiostat. In this study, well aligned CuO nanorods were obtained with a high growth rate (as high as 113 nm/min). Furthermore, primarily (020) directional growth was determined from X-ray diffraction measurements, and a maximum photocurrent density of −1.02 mA/cm 2 at −0.6 V (vs. saturated calomel electrode) was obtained from the CuO nanorod photoelectrode grown in this experiment.Photoelectrochemical (PEC) cells are considered to be efficient solar energy converters. 1 PEC cells convert solar energy into storable clean energy as hydrogen is created from water. Accordingly, many studies have used solar energy in water splitting for the production of hydrogen. 1-7 Semiconductors such as TiO 2 , 1-3 SrTiO 3 , 4 BaTiO 4 , 5 and ZnO 6 have been investigated as photoelectrode candidates. These materials are stable inside electrolytes but cannot fully absorb visible light due to their large band gaps. An ideal semiconductor for a PEC cell should have a bandgap between 1.7 and 2.1 eV, which is larger than the theoretical minimum value of 1.23 eV needed for water splitting, 8 and should be economically available. Therefore, cupric oxide (CuO) is expected to be a promising photoelectrode candidate due to its narrow bandgap and abundance. 7,8 CuO is well regarded as a p-type semiconductor with a narrow bandgap (1.4-1.7 eV) and has been extensively studied due to its properties and applications in electronics, sensors, optics, batteries, field emission devices, superconductors and photocatalysts. 9-15 Many studies have been carried out to synthesize various CuO nanostructures because the properties of CuO depend on its structure and morphology. [16][17][18] In particular, one-dimensional (1-D) structures such as nanorods with large surface areas are attracting much attention because of the many advanced properties of such 1-D nanostructures. 19,20 In this regard, the vertical growth of the 1-D CuO nanostructure is relevant to CuO photoelectrodes.Many growth methods have been developed for the synthesis of CuO 1-D nanostructures, such as hydrothermal, 21,22 and arc-discharge processes, 23 thermal evaporation 24 and thermal oxidation using copper foil. 11,20 However, these conventional methods have challenges, including growth rate, cost efficiency and synthesis on a transparent conducting oxide (TCO) substrate. In this study, CuO nanorods were synthesized using a modified chemical bath deposition (M-CBD) method that hea...

show abstract

Synthesis of aligned copper oxide nanorod arrays by a seed mediated hydrothermal method

Cited by 51 publications

References 30 publications

Structural, electrical and H2 sensing properties of copper oxide nanowires on glass substrate by anodization

Structural, electrical and H2 sensing properties of copper oxide nanowires on glass substrate by anodization

A green synthesis of copper oxide nanoparticles by mechanochemical method

Effects of Growth Temperature on Cupric Oxide Nanorod Photoelectrodes Using a Modified Chemical Bath Deposition

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