Re-examination of the non-stoichiometry and defect structure of copper(II) oxide or tenorite, Cu1±zO or CuO1±ε A short review

Carel, C.; Mouallem-Bahout, M.; Gaude, J.

doi:10.1016/s0167-2738(98)00247-1

Cited by 48 publications

(15 citation statements)

References 16 publications

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“…Thus, great efforts have been made to study the preparation of nanosized CuO in the past two decades. Conventional methods for the preparation of CuO powders include one step solidstate reaction at room temperature, thermal decomposition of copper salts and mechanical milling of commercial powders [9][10][11]. Solid-state mechanochemical processing is an effective, useful and simple processing technique widely applied to the synthesis of quasicrystalline, nanocrystalline and crystalline materials, which is not only a physical size reduction process in conventional milling but also a chemical reaction that is mechanically activated at the nanoscale during grinding.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis and Effect of Temperature on Optical Properties of CuO Nanoparticles

et al. 2012

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Abstract:Modulation of band energies through size control offers new ways to control photoresponse and photoconversion efficiency of the solar cell. The P -type semiconductor of copper oxide is an important functional material used for photovoltaic cells. CuO is attractive as a selective solar absorber since it has high solar absorbance and a low thermal emittance. The present work describes the synthesis and characterization of semiconducting CuO nanoparticles via one-step, solid-state reaction in the presence of Polyethylene glycol 400 as size controlling agent for the preparation of CuO nanoparticles at different temperatures. Solid-state mechanochemical processing, which is not only a physical size reduction process in conventional milling but also a chemical reaction, is mechanically activated at the nanoscale during grinding. The present method is a simple and efficient method of preparing nanoparticles with high yield at low cost. The structural and chemical composition of the nanoparticles were analyzed by X-ray diffraction, field emission scanning electron microscopy and energy-dispersive spectrometer, respectively. Optical properties and band gap of CuO nanoparticles were studied by UV-Vis spectroscopy. These results showed that the band gap energy decreased with increase of annealing temperature, which can be attributed to the improvement in grain size of the samples.

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Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis and Effect of Temperature on Optical Properties of CuO Nanoparticles

et al. 2012

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“…Nevertheless, little information is available on the CuO defect structure [25]. CuO is intrinsically a p-type semiconductor due to the existence of Cu vacancies.…”

Section: Resultsmentioning

confidence: 99%

“…The formation energy of O Cu antisite defects of acceptor nature is actually only slightly higher than the formation energy of Cu vacancies [27]. In any case, it is currently recognized [25] that a systematic study of the stoichiometry and defect structure of CuO, particularly in samples grown in a wide range of well-defined equilibrium conditions, is still necessary.…”

Section: Resultsmentioning

confidence: 99%

Optical and magnetic properties of CuO nanowires grown by thermal oxidation

Vila¹,

Dı́az-Guerra²,

Piqueras

2010

J. Phys. D: Appl. Phys.

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CuO nanostructures with different morphologies, such as single-crystal nanowires, nanoribbons and nanorods, have been grown by thermal oxidation of copper in the (380-900) ºC temperature range. Cathodoluminescence spectra of the nanostructures show a band peaked at 1.31 eV which is associated to near band gap transitions of CuO. Two additional bands centred at about 1.23 eV and 1.11 eV, suggested to be due to defects, are observed for nanostructures grown at high temperatures. The magnetic behaviour of nanowires with lengths in the range of several microns and diameters of (50-120) nm has been investigated.Hysteresis loops of the nanowires show ferromagnetic behaviour from 5 K to room temperature. P.A.C

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“…Conventional methods for the preparation of CuO nanopowders include onestep solid state reaction at room temperature, thermal decomposition of copper salts, mechanical milling of com-mercial powders, and so on. 15,16 However, none of these methods seems to be suitable for the preparation of one-dimensional nanostructured materials. The preparation of nanostructured materials has been a challenging research because of the fundamental importance and the wide range of their potential application in nanodevices.…”

Section: Introductionmentioning

confidence: 99%

“…Despite considerable efforts devoted to the preparation of the nanosized CuO, [15][16][17][18][19][20][21][22][23][24][25] there is a lack of information about ultrasonic-assisted (US) preparation methods especially US thermal decomposition and US liquid hydrolysis methods.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic‐assisted Preparation Methods on Structure, Morphology and Optical Properties of Nanosized Cupric Oxide

Gharagozlou¹,

Rahnama²

2011

J Chinese Chemical Soc

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Cupric oxide is a p-type semiconductor with a narrow band-gap which is suitable for catalysis, electrochemical cells, field emission devices and gas sensor applications. Despite considerable efforts devoted to the preparation of the nanosized CuO, there is a lack of information about ultrasonic-assisted (US) preparation methods. Nanosized cupric oxide was successfully prepared through different ultrasonic-assisted (US) preparation methods. Furthermore, the influence of preparation method on the structure, morphology and optical properties of nanosized CuO has been reported. XRD patterns were identical to the single-phase pure CuO with a monoclinic structure. The enhancement of the crystallinity and crystallite size was observed for the sample prepared through the US thermal decomposition. The absorption band of CuO nanocrystals prepared through the US liquid hydrolysis shows a clear red shift of about 40 nm compared to those obtained with other preparation methods. Our results indicated that almost spherical CuO nanoparticles with an average size of 65 nm were prepared during the US thermal decomposition, while CuO rod-like nanostructures with an average diameter of about 16 nm were obtained via the US liquid hydrolysis method. The band gap values of nanosized CuO samples were larger than the reported value for the bulk CuO. Synthesized CuO samples by US methods with adjustable and controllable properties make the applicability of cupric oxide even more versatile.

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Re-examination of the non-stoichiometry and defect structure of copper(II) oxide or tenorite, Cu1±zO or CuO1±ε A short review

Cited by 48 publications

References 16 publications

Solid-State Synthesis and Effect of Temperature on Optical Properties of CuO Nanoparticles

Solid-State Synthesis and Effect of Temperature on Optical Properties of CuO Nanoparticles

Optical and magnetic properties of CuO nanowires grown by thermal oxidation

Effect of Ultrasonic‐assisted Preparation Methods on Structure, Morphology and Optical Properties of Nanosized Cupric Oxide

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