Chemical bath deposition (CBD) was used to grow ZnO nanorods on glass substrates. Grown ZnO nanorods are dipped in a copper nitrate trihydrate [Cu(NO 3) 2.3 H 2 O] solution at 90 °C for 30 min before being annealed at 400 °C for 1 h to convert Cu 2+ ions to CuO nanoparticles, forming a ZnO/CuO thin films nanocomposite. Images obtained from a Field …
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Download scientific diagram | XRD pattern of ZnO and CuO NPs and GCD-Zs nanocomposites: (a) XRD patterns of ZnO and different percentages of GCD-Zs (1.5-15.5%), in which the crystallinity ...
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XRD characterization depicts the formation of hexagonal and monoclinic structures of ZnO and CuO, respectively. SEM studies of the nanocomposites show that ZnO has sheet-like design …
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The synthesis of binary and ternary mixed oxides based on ZnO has also been proposed, such as ZnO/TiO 2, ZnO/CeO 2, ZnO/Fe 3 O 4 and CuO/CeO 2 /ZnO as photocatalysts in the degradation of various dyes [6], [7]. The formation of these mixed oxides is done to shift their degree of absorption towards the visible spectrum and reduce the rate of ...
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The construction of n–p-type composites between n-type ZnO and p-type CuO, where electrons move from n-type ZnO to p-type CuO while the holes transfer conversely from CuO to ZnO until the system obtains equalization at the Fermi level, results in the formation of a hole depletion layer that promotes the quantity of the chemisorbed oxygen species.
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Desired ZnO-CuO-MnONCs is synthesised using Co-precipitation method and characterized with XRD, FTIR and UV–Visible, PL, SEM, EDX, TEM, SAED. XRD depit …
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The FESEM images of CuO/ZnO and CuO/CdO NCs were shown in Fig. 4 (a–c) and Fig. 5 (a–c). The attained particles of the synthesized CuO/ZnO and CuO/CdO NCs are seemed as spherical and stone-like morphology. From the observed figure, CuO/ZnO NCs have a uniform distribution of the particles and it has a large surface area compared to CuO/CdO NCs.
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This article reviews the synthesis techniques of the CuO-ZnO nanocomposite and its morphology. Various practical applications of the CuO-ZnO nanocomposites have also been discussed.
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In the current study, ZnO, CuO and ZnO/CuO mixed metal oxide nano-composites with different molar ratio of Zn/Cu (10:1, 8:1, 6:1, 4:1, 2:1) were prepared via low temperature …
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In addition, variations in the CuO content affected the performance of the CuO−ZnO NCs. Thus, the CuO−ZnO NCs prepared using V. sinaiticum Benth. extract could make the material a desirable ...
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ZnO/CuO nanocomposites were developed with varying CuO concentrations by a chemical method. XRD results show that the crystal structure of CuO is monoclinic, whereas ZnO is a hexagonal phase. Compared to pure ZnO, in the ZnO/CuO nanocomposites, the absorption edge shifted towards wavelength. The optical band gap of ZnO/CuO ranged between 3.36 ...
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Different p-and n-type semiconductor-based composite nanomaterials have been manufactured, including SnO 2 /CuO [19], PdO/SnO 2 [20], SnO 2 /ZnO [21], ZnO/CdO [22] and ZnO/CuO [23], for improved ...
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Production of CuO-ZnO nanocomposite by an alkaline vapor oxidation process. SEM images of brass plate at the non-immersed portion (C) and the immersed portion (D) …
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Current study delineates the synthesis and environmental applications of ZnO/CuO nanocomposite in photocatalysis and gas sensing. The ZnO/CuO nanocomposites (1:1, 1:2, …
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The photocatalytic activity of CuO/ZnO composites was evaluated by the decomposition of four types of pollutants: phenol rhodamine B (RhB), heteropolyaromatic …
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They observed that by inserting nanoparticle CuO/ZnO (Cu/ZnO = 7/3), photothermal conversion efficiencies in CuO nanofluid could be improved from 95% to 97.35% [30]. In Amjad et al. comparative ...
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The degradation efficiency of CuO, ZnO, and 2% CuO@ZnO against methylene blue was found to be 52%, 68%, and 98%, respectively, exhibiting the best performance of as-prepared nanocomposite. As-prepared CuO@ZnO nanocomposites would be applicable for the photocatalytic degradation of other organic pollutants. 2. Experimental 2.1. Chemicals and ...
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CuO and ZnO are the typical antibacterial materials [4], [5], which are both nontoxic, cost-effective, and environmentally friendly.The antibacterial properties of CuO/ZnO nano-hybrids have also been reported [6], [7], [8], but the mechanism is complex and still unclear.In this work, the formation of p-n heterojunctions is confirmed in CuO/ZnO nano-hybrids.
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In this manuscript, ZnO/CuO nanocomposites with different concentrations of CuO were synthesized using a simple hydrothermal method. The x-ray diffraction (XRD), X-ray fluorescence (XRF), atomic ...
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Nanoparticles, owing to their unique physicochemical properties, have garnered significant attention in various scientific disciplines, including materials science, chemistry, biology, and environmental engineering. In recent years, the synthesis of metal oxide nanoparticles, such as NiO, Fe2O3, ZnO, SnO2, and CuO via green routes, has gained …
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Besides that, the ZnO/CuO composite coatings (ZC) that ZnO as the bottom and the CuO/ZnO (CZ) that CuO as the bottom were also prepared following the same parameters as preparing the mono-coating of ZnO or CuO. The bigger changes were given to the co-sputtered ZnO&CuO (Z&C) coating. Since the Zn and Cu targets were sputtered at the same time ...
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Despite the low power conversion efficiency of solar cells n-ZnO/p-CuO and n-ZnO/p-Cu2O, they can contribute to the development of photovoltaic energy. To optimize their yields, the simulator software SCAPS-1D was used in this work to do the simulations of the two cells (Fig. 1) by varying certain parameters. Its parameters were thickness, bandgap, shallow …
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This research focuses on the green synthesis of a 10% ZnO/CuO nanocomposite (ZnO:CuO ratio; 90:10) utilizing Citrus limon, a plant that contains citric acid, which functions as a good capping and ...
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Mekdes synthesized ZnO/CuO composites by mixing 0.272 g of zinc nitrate hexahydrate with 0.2497 g of copper nitrate pentahydrate for 80⁰C for 15 hr . The ZnO/CuO composites synthesis by mixing zinc chloride and copper oxide in the presence of hexadecyltrimethylammonium bromide (CTAB) and sodium hydroxide as surfactants .
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Nanocomposites of CuO/ZnO nanotubes can be attained by dipping ZnO nanotubes into the solution. Glucose working electrode with nanostructures has higher surface-to-volume ratio and raises its sensitivity to the target substance. The CuO/ZnO nanotubes electrode has promoted its sensitivity to glucose up to 3.2 mAmM −1 cm −2. It shows good ...
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1.2. Characteristics of ZnO NPs. Zn is essential to life, but it is toxic at high levels. ZnO NPs are widely used as nanosensors [], UV-absorbers [], and catalysts [].Some studies have reported that ZnO and its NPs have strong absorption abilities for a series of organic compounds and heavy metals [34,35].Because ZnO NPs are considered safe for humans and they reflect …
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Introducing copper (Cu) into the zinc oxide (ZnO) lattice caused a high-angle shift in the XRD pattern peaks. High-resolution transmission electron microscopy (HRTEM) images …
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2.1 Materials. All the chemical reagents and solvents used in the present work for the preparation of nanocrystalline CuO/ZnO composite powders, including Zn(NO 3) 2 ⋅6H 2 O (zinc nitrate hexahydrate), Cu(NO 3) 2 ⋅3H 2 O (copper nitrate trihydrate), and C 4 H 11 NO 2 (diethanolamine, DEA) were of analytical grade, supplied by Ajax Finechem, and used as …
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The spectra of pure ZnO nanorods possess an absorption at around 370 nm corresponding to the band gap of ZnO whereas the band gap absorption edge get slightly red shifted to 374 nm in the case of ...
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In this study, we aimed to produce CuO/ZnO nanoparticles biosynthesized by the leaf extract of Annona glabra L for antibacterial, antioxidant and photocatalytic activities. This plant belongs to the Annonaceae family, and is a tropical wild species grown in America, Africa, Australia and Southeast Asia, including Malaysia, Thailand, ...
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Using a wet chemical solvothermal method, ZnO, CuO, Cu doped ZnO and ZnO–CuO composites were obtained. We determined the doped limit of Cu in ZnO at 3 wt%, …
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Current study delineates the synthesis and environmental applications of ZnO/CuO nanocomposite in photocatalysis and gas sensing. The ZnO/CuO nanocomposites (1:1, 1:2, and 2:1) were synthesized by a cost-effective and simple co-precipitation method. X-ray diffraction and high-resolution transmission electron microscopy investigation confirms the monoclinic crystal …
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Zinc oxide (ZnO, n-type) and copper oxide (CuO, p-type) nanowires have been synthesized and preliminarily investigated as innovative materials for the fabrication of a proof-of-concept thermoelectric device.The Seebeck coefficients, electrical conductivity and thermoelectric power factors (TPF) of both semiconductor materials have been determined independently …
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In comparison to pristine CuO and ZnO NPs, the CZ-NC demonstrated notably enhanced photocatalytic activity in the degradation of Rhodamine B dye (RhB). The optimum …
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ZnO/CuO coupled semiconductor has been synthesized by several methods such as co-precipitation method [20], chemical vapor deposition [21], sol–gel method [22], wet impregnation method [23], thermal decomposition method [1], the complex-directed hybridization [24], mechanical alloying and directly heating of brass in air [25], [26]pared to all …
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Steering the selectivity of electrocatalysts toward the desired product is crucial in the electrochemical reduction of CO2. A promising approach is the electronic modification of the catalyst's active phase. In this work, we report on …
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