As shown in Fig. 1, ZnO/CuO nanocomposite ZC NC (93:7) was synthesized by fully melting 6 g of Zn(CH 3 COO) 2 and 0.3790 g of Cu(CH 3 COO) 2 at 60 °C using a magnetic stirrer, in 100 ml and 7 ml of an aqueous ethanol solution, respectively. Next, 5 g of NaOH was dissolved in 50 ml of DDW and was added drop-by-drop to the mixture …
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Also, Haque et al. reported that there is a small shift in the XRD peak position of CuO/Na relative to pure CuO [40]. Wang et al. reported that the incorporation of Zn 2+ ions into the CuO lattice ...
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In this study, a simple and green strategy was reported to prepare bimetallic nanoparticles (NPs) by the combination of zinc oxide (ZnO) and copper oxide (CuO) using Sambucus nigra L. extract. The ...
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For ZnO, ZnO:Cu, and ZnO:Fe, they were 3.29, 3.22, and 3.215 eV, respectively. The lower optically determined bad gap was shown for ZnO-ZnFe 2 O 4 and ZnO-CuO [32,33] nanocomposites, which could be an additional marker for the correctness of the above-determined phase composition of the materials. ZnO:Fe and ZnO:Cu …
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Biogenic metal oxide nanoparticles (NPs) have emerged as a useful tool in biology due to their biocompatibility properties with most biological systems. In this study, we report the synthesis of copper oxide (CuO), zinc oxide (ZnO) nanoparticles (NPs), and their nanocomposite (CuO–ZnO) prepared using the phytochemical extracts from the leaves …
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The Cl-GO@CuO/Cu 2 O electrode shows a maximum capacity of 577 F g −1 at 5 mV s −1. In addition, the Cl-GO@CuO/Cu 2 O symmetric supercapacitor achieved a maximum energy density of 25.3 Wh kg −1 and maximum power density of 700.0 W kg −1. With capacitance retention of 97.07%, the device exhibits stability for up to 2000 cycles.
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Cu went through a similar process and generally formed CuO in a salt environment [50]: (4) Zn 2 + + 2 OH − → ZnO + H 2 O, (5) Cu 2 + + 2 OH − → CuO + H 2 O. With the migration of ions, Ca 2+ and HPO 4 2− in the SBF possibly favored the formation of the new thermodynamically stable Ca/P phase, which nucleated at the …
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Abstract. In this work, a nanohybrid of CuO/Mn 3 O 4 /ZnO was generated through a simple hydrothermal based procedure. The CuO/Mn 3 O 4 /ZnO nanohybrid …
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Cu/CuO-Doped ZnO Nanocomposites via Solution Combustion Synthesis for Catalytic 4-Nitrophenol Reduction | ACS Omega Article Cu/CuO-Doped ZnO …
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The synthesis of ZnO/CuO films on ITO substrate was realized in two steps, first ZnO was deposited electrochemically and then CuO nanoparticles were precipitated with help of spin coating technique. ZnO nanorods were obtained in aqueous Zn(NO3)2 solution, in presence of KCl as capping agent. Spin coating technique yielded CuO …
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Therefore, to increase photocatalytic activity, a small amount of ZnO can be added to the CuO nanoparticle, and a heterogeneous p-n semiconductor can be obtained [9, 23]. By radiating light to the semiconductor, e − /h + pairs are formed in CuO and ZnO. Because the conduction bands (CB) and valence bands (VB) of ZnO are at a lower level …
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The presence of CuO and ZnO peaks of XRD result reveals nanocomposite formation. The UV absorbance spectra show the variation in band gap energy from 3.04 to–3.14 eV for all the used electrolytes at 2M concentrations. The Raman spectra confirm the pure phases of CuO-ZnO nanoparticles. The CuO-ZnO flower shape (3D) shows …
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2.2 Characterization of the CuO/ZnO nanocomposite films. The structural characterization of the obtained CuO/ZnO nanocomposite thin films was carried out by X-ray diffraction (Bruker D8 Advance Serie II, diffractometer using Cu-Kα radiation (λ = 1.540056 A°)).The samples were scanned in reflection mode in the range 25–80° in 2θ with a step …
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2.2 Synthesis of ZnO/CuO Nanocomposites. The ZnO/CuO (in the ration of 1:1, 1:2, and 2:1) nanocomposites were synthesized by CPT method using Cu (NO 3) 2 …
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There is a minor change in the XRD pattern of ZnO at low concentrations of CuO in C-1 (10% CuO). The peak of CuO in the XRD pattern of 10% CuO nanocomposites exists with very small intensity. When the concentration of CuO increased from 30% to 50%, the CuO peaks are visible at 2θ ≈ 29.35°, 38.75° and 48.55°.
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The aim of this article is to help researchers that are involved in the field of metal nanocomposites by compiling the data on various synthesis methods, morphology of …
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In this work, ZnO and CuO nanocrystalline powders were prepared by method of high-energy ball milling. The milling process was performed at 450 rpm speed for 5, 10, 15, and 20 h periods of time. Structural and morphological properties of the powders were investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM) and …
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(a) XRD patterns of the Cu–Zn alloy electrodeposited on a Cu substrate in the 12CU ionic liquid containing 0.1 M ZnO and 0.01 M CuO at different cathodic potentials and 333 K for 100 min. (b) and (c) SEM images of the Cu–Zn electrodeposits obtained on a Cu substrate in the 12CU ionic liquid containing 0.1 M ZnO and 0.01 M CuO at 333 K for ...
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The synthesis of the ZnO/CuO nanocomposite was carried out using the co-precipitation method. The synthesized samples were characterized via the XRD, FT-IR, FE-SEM, Raman, and BET techniques. The ...
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The lattice parameters have been calculated using Le-Bail and Pawley refinement method. The unit cell parameters 'a' and 'c' obtained from the XRD data for all the samples are tabulated in Table 1.For Cu doped samples, lattice parameters 'a' and 'c' have been found to be smaller as compared to those of undoped ZnO.This is due to a …
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Comments. In this study, a simple and green strategy was reported to prepare bimetallic nanoparticles (NPs) by the combination of zinc oxide (ZnO) and copper …
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CuO–ZnO nanocomposite films were synthesized through the oxidation of nanostructured Cu–Zn films deposited by vacuum deposition technique at a relatively high pressure of an inert gas. XRD patterns showed that the film samples were nanocomposites containing nanograins of CuO and ZnO and that the size of the CuO grains decreased …
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XRD pattern of as prepared CuO nanoparticles is shown in figure 1. It gives a single-phase with a monoclinic structure. Lattice parameters are a = 4.84 Å, b = 3.47 Å, c = 5.33 Å.
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The present investigation elucidated the influence of nanoparticle volume fraction and temperature on the thermal conductivity and viscosity of water-based CuO, TiO2 and ZnO nanofluids. All the nanoparticles used in the present study were synthesised using the chemical co-precipitation method and their structural and morphological …
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ZnO-ийн талстын хэмжээ тээрэмдэх хугацаанаас хамаарах нь. 1- р хү снэгтээс харахад дээжийг тээрэмдсэн
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Бөмбөлөгт тээрэм нэгэн төрлийн болгогчийн үйл ажиллагааны журам; Бөмбөлгүүдийн тээрэм нэгэн төрлийн болгогчийн давуу тал; Бөмбөлгүүдийн тээрэм нэгэн төрлийн болгогчийн сул тал
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The structure and crystalline phase of synthesized nano-composites with different molar ratio were examined by using XRD and shown in Fig. 1 a. In pure ZnO, all diffraction peaks located at 2θ = 31.91°, 34.61°, 36.45°, 47.56°, 56.98°, 63.05°, 67.92° and 69.43° represent hexagonal wurtzite structure of ZnO (JCPDS card no. 00–036-1451) …
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The XRD patterns of the CuO/ZnO/CNTs samples showedan additional one-dimensional diffraction peak at 2θ = 26.305°, which matched the (0 0 2) hexagonal structure of CNTs. The structural parameters are shown in Table 1. 3.2. FTIR analysis of CuO/ZnO/CNTs. The functional vibrationpropertiesof the as-prepared materials were …
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A highly sensitive sensor for hydrogen sulfide based on a p–n junction between metal-oxide semiconductors is reported herein. Uniform ZnO–CuO hollow spheres were synthesized by a combination of chemical and physical methods. To deposit a uniform ZnO layer, the silicon substrate was tilted from 0° to 40° relative to the gas flow direction …
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The highest current densities of WO 3 /ZnO and CuO/ZnO nanocomposites were 1.28 mA cm −2 and 2.49 mA cm −2 at 1.23 V (versus a reversible hydrogen electrode) ... CuO/ZnO nanocomposites, in which the XRD patterns from the FTO substrate, ZnO nanoparticles and nanorods, WO3 nanoparticles, and CuO nanoparticles are shown for …
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Particle sizes of pristine and Ag-doped ZnO/CuO thin films were found to vary from 32 to 58 nm. Crystallite size was changed from 16.40 to 18.90 nm with changing Ag dopant in the ZnO/CuO composite film. FTIR spectra that have the absorption peaks at ~ 725 and ~ 510 cm−1 referred to the stretching vibration of Zn–O and Cu–O bonds during ...
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X-ray diffraction (XRD) analysis was used to examine the structural characteristics of the synthesized ZnO/CuO and ZnO/CuO/rGO heterostructure electrode by employing the PXRD-system with Cu K-α (=1.54056 nm) radiation at a scanning rate of 1°/min. Raman spectroscopy (Renishaw) System with 514 nm was used to study the …
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Nanotechnology is a completely unique branch of technology that offers with substances in a very small size between (1–100 nm) with various crystal shapes. Metals have ability to produce large number of oxides. These metal oxides play a major role in many areas of chemistry, physics, material science and food science. In this research, …
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Abstract. In this work, we present the synthesis and characterization of nanoparticles suitable for semiconductor applications using a simple and economical sol-gel process. ZnO-CuO is the ...
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Likewise, CuO, CuO/ZnO, CuO/Mn 3 O 4 and CuO/Mn 3 O 4 /ZnO were excited at ~ 449 nm and their spectra recorded (Fig. 5c). The first peak in the emission spectrum of CuO at ~ 487 nm could be ...
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The ZnO/CuO nanocomposite with 10 wt% of CuO demonstrated a high dye degradation efficiency (97.15%) than 2.5 wt% and 5 wt% of CuO content. However, …
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CuO–ZnO nanocomposites (NCs) were synthesized using an aqueous extract of rate constant compared to 0.0027 min for ZnO nanoparticles (NPs). Similarly, a ratio constant of 5.925 min (ii) narrow …
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Three nanoparticulate oxides have been synthesized using a relatively simple, inexpensive, and rapid experimental method with the added advantage of involving only aqueous solutions and dispersions. SEM and XRD data lead to the following particle diameters: 25–150 nm for ZnO, 25–150 nm for CuO, and <40 nm for Cu 0.05 Zn 0.95 O. …
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CuO/ZnO/Al 2 O 3 is a conventional composite catalyst which is widely used for methanol synthesis from syngas. Copper species are considered to be the most important active component for the hydrogenation of CO 2 to CH 3 OH. It is generally proposed that the coordination, chemisorption, and activation of carbon dioxide takes …
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