Abstract The synergism of nanocomposite heavily impacts the performance of gas sensing materials, that need to be systematically and deeply investigated to meet the high application requirement. In this work, we present gas sensors developed by ZnO-CuO core-shell nanowires (C-S NWs) and ZnO/CuO NWs (ZnO NWs modified by CuO nanoparticles) synthesized by a facile three-step process. The sensing performances for both structures were investigated toward the oxidizing gas NO2 and the reducing gas ben...
Last. Javed Iqbal(QAU: Quaid-i-Azam University)H-Index: 62
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In the present study, a simple chemical method for the preparation of CuO nanostructures by varying Mn-doping concentration has been reported. It also provides an extensive investigation of structural, surface, and optical and dielectric properties of Mn-doped CuO nanostructures. Single-phase monoclinic crystal structure of CuO formation for all samples with average crystallite size of 20–24 nm has been observed from X-ray diffraction (XRD) results. A morphological transformation from nanosheets...
Abstract Ni-doped CuO nanorods were grown on a CuO film buffered with a FTO substrate using different nickel amounts via the modified chemical bath deposition method. We investigated the effect of the Ni doping concentration on the morphological, optical, structural and photoelectrochemical properties of the Ni-doped CuO nanorods. In this study, the maximum photocurrent density of −1.75 mA/cm 2 at −0.55 V (vs. SCE) was obtained from the Ni-doped CuO photoelectrode with a Ni doping concentration ...
Abstract The present work reports the synthesis of Cu 1- x Ni x O ( x = 0%, 3%, 6% and 9%) nanoparticles by co-precipitation method and correlates the effect of nickel on structural, optical and electrical properties. A phase separation into cubic NiO was observed at the higher nickel concentration of 9%. The difference in ionic radii between copper and nickel resulted in the lattice contraction. The mean crystallite size and strain values were found to be varying with respect to nickel concentr...
Abstract Monoclinic undoped and Tb doped CuO are prepared by solution combustion method and annealed at different temperatures. The effect of annealing and doping on their structural and optical properties of CuO are examined using XRD, FTIR and DRS. The surface and lattice defects in CuO and Tb doped CuO is analyzed qualitatively and quantitatively using positron lifetime and Doppler broadening spectroscopy. The average positron lifetime and electron momentum (energy) S parameter increases owin...
#1Çiğdem Oruç(YTU: Yıldız Technical University)H-Index: 5
#2Ahmet Altındal(YTU: Yıldız Technical University)H-Index: 26
Abstract The DC conduction and dielectric behaviour of copper oxide nanoparticles prepared by sol-gel method and sintered at 950 °C were studied in the temperature range of 200–526 K. The formation of single phase monoclinic CuO was confirmed by x-ray diffraction. Chemical composition of the CuO ceramic was investigated with X-ray photoelectron spectroscopy (XPS) technique. Although XRD analysis shows the formation of single phase CuO, XPS spectra revealed the presence of Cu 3+ and Cu 2+ . Devia...
Abstract Cu-doped ZnO (Zn 1−x Cu x O, x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05) nanocrystals were synthesized by ice-bath assisted sonochemical method. X-ray diffraction (XRD) analysis of the undoped and Cu-doped ZnO nanostructures reveals the formation of ZnO hexagonal wurtzite structure for all samples which confirm the incorporation of Cu 2+ ions into the ZnO lattice by substitution. Increasing the Cu concentration resulted in a contraction of the bond length and the unit cell volume, whereas, ...
Abstract Multiple nanoplate-like CuO and Ce-doped CuO nanoleaves were synthesized by a simple co-precipitation of Cu(NO 3 ) 2 ∙6H 2 O and Ce(NO 3 ) 3 ∙6H 2 O in alkaline solutions. In this research, the as-synthesized samples were monoclinic CuO with high crystalline degree. Undoped CuO was composed of multiple nanoplate clusters, which were broken and transformed into nanoleaves for Ce-doped CuO samples. The undoped CuO and 3 mol% Ce-doped CuO were applied for photodegradation of methylene blue...
Undoped and Ni-doped CuO thin films were deposited onto glass substrates using a spin-coating technique at different doping concentrations (undoped, 2, 4, 6, and 10 %). X-ray diffraction patterns for undoped and Ni-doped CuO thin films indicated that the films were polycrystalline, with preferential growth in the (002), (111), and (−311) directions. Atomic force microscopy images revealed that the surface morphologies of the films were not uniform. Scanning electron microscopy images confirmed t...
Abstract Copper oxide is an excellent oxide based semiconductor with a wide bandgap and also a promising candidate for dilute magnetic semiconductor (DMS) when doped with some transition elements. We report 0.5% of manganese doped copper oxide based DMS with glycine as surfactant and surface assisting agent using a simple chemical route. The synthesized DMS material forms a nanoflake like structures and exhibit magnetic hysteresis at room temperature. At low temperature, the material exhibit wea...
Abstract null null New diluted magnetic semiconductors composed of CuO, Cu0.985Mn0.005Fe0.005Co0.005O, Cu0.97Mn0.01Fe0.01Co0.01O and Cu0.94Mn0.02Fe0.02Co0.02O compositions were fabricated by coprecipitation method. The XRD and Rietveld refinement analysis indicated that only single phase of monoclinic CuO was formed in all compositions without detection of any impurities. The shifts of XRD peak and the changes in lattice parameters of CuO were related to the incorporation of Mn2+, Fe2+/3+ and Co...
#1Li Li(EPRI: Electric Power Research Institute)H-Index: 2
#2Salah Ud Din(ZJU: Zhejiang University)H-Index: 4
Last. Liping Zhu(ZJU: Zhejiang University)H-Index: 72
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Sulfuryl fluoride (SO2F2) is one of the ideal decomposition components of sulfur hexafluoride (SF6), which has been widely used as insulating and arc-quenching medium in gas-insulated switchgear (GIS) power equipment. To detect SF6 decomposition component at room temperature, use of SO2F2 still poses challenges. In this work, we have successfully prepared TiO2 nanofibers and Nickle sulfate (NiSO4 NPs) via facile electrospun and hydrothermal methods, followed by calcination process to improve sen...
Copper oxide and Zinc (Zn)-doped Copper oxide nanostructures (CuO-NSs) are successfully synthesized by using a hydrothermal technique. The as-obtained pure and Zn-doped CuO-NSs were tested to study the effect of doping in CuO on structural, optical, and antibacterial properties. The band gap of the nanostructures is calculated by using the Tauc plot. Our results have shown that the band gap of CuO reduces with the addition of Zinc. Optimization of processing conditions and concentration of precu...
Abstract Herein, we designed compositions with strong ferromagnetic and efficient Vis/NIR photocatalytic properties based on Fe/Mn, Co or Ni codoped CuO nanostructures. Pure CuO, Cu0.97Fe0.03O, Cu0.94Fe0.03Mn0.03O, Cu0.94Fe0.03Co0.03O and Cu0.94Fe0.03Ni0.03O nanopowders were synthesized by simple and low cost co-precipitation method. The XRD exhibits only the crystallographic planes of monoclinic CuO with reasoning variation tendency of lattice constant due to incorporation of Fe, Mn, Co or Ni i...
Last. Liping Zhu(ZJU: Zhejiang University)H-Index: 72
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In this work, we report the spontaneous formation of NiO nanoparticles-decorated on smooth SnO2 nanofibers, which is an inexpensive and scalable method to yield high composite surface area via two steps facile synthesis process based on electrospinning and hydrothermal method. The layers of nanofibers, which containing the conducting electrolyte of proton, Nickel Oxide are deposited homogeneously over a large surface area from transparent solution of the electrolyte mixed and decorated on Tin di...
Last. Ting Lei(CSU: Central South University)H-Index: 11
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Copper oxide (CuO) nanoparticles (NPs) doped by Mg2+, Zn2+ and Ce4+ ions were prepared by hydrothermal method. SEM images revealed the spherical surface morphology for all doped CuO NPs. XRD patterns confirm that all doped CuO NPs exhibit the monoclinic structure at a dopant concentration less than 7%, when the doping content is up to 10%, MgO, ZnO and CeO2 phase formed. ICP analysis indicated that these three doping elements have a promoting effect on the release of Cu2+ from doped CuO NPs. Mor...
