The ZnO/CuO solar cells with 10% cobalt doped ZnO and 20 nm thick MoO 3 buffer layer achieved the best power conversion efficiency of 2.11%. Our results demonstrate the crucial role of the band alignment on the performance of the ZnO/CuO heterojunction solar cells and could pave the way for further progress on improving conversion efficiency in ...
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.
Nanostructured metal oxide-based nanocomposites have been widely used for photocatalysis-mediated removal of toxic substances. The search for a better photocatalyst seems relentless, and numerous metal oxide-based materials have emerged out of investigations. This overview presents the works involving the use of ZnO, CuO and NiO as photocatalysts …
These issues can be resolved by coupling ZnO with other semiconductors with suitable characteristics. CuO is a p-type semiconductor with band gap energy in the range of 1.2–2.79 eV, biosafe, naturally abundant and highly stable [16].The coupling of CuO with ZnO nanostructures can significantly reduce the electron-hole pair recombination rate through …
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 …
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 ...
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%, …
The obtained CuO nanostructured materials have been characterized by Brooker D8 X-ray diffractometer for average crystallite size, Horiba SZ-100 Dynamic Light Scattering is used for measuring of ...
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 .
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 ...
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 …
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 ...
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 …
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, ...
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 …
2.4 Wet impregnation method. Sathishkumar et al. [] synthesized CuO-ZnO nanofibers by the wet impregnation method.ZnO nanoparticles were mixed with an aqueous solution of Cu sulfate CuSO 4 ·5H 2 O with stirring for 48 h for the incorporation of CuO on ZnO. The mixture was heated at 100°C for 24 h to evaporate the unwanted water and calcinated at 550°C for 5 h.
The materials ZnO, CuO, Cu doped ZnO at 1, 2 and 3 wt%, and composite CuO ZnO for 6, 8, 10, 15, 30 and 50 wt% Cu incorporation samples show a 2D morphology and they were synthesized successfully by a hydrothermal method. From XRD patterns, Rietveld analysis determined that hexagonal ZnO and monoclinic CuO crystallographic phases were presented ...
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 ...
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.
Zinc oxide (ZnO) is an important and eco-friendly II-IV group semiconductor material and is commonly used as a high energy density battery active material (Askari and Salarizadeh, 2020; Ma et al., 2021b; Park and Jung, 2012).ZnO is an ideal choice for supercapacitor electrode material due to its low cost, eco-friendliness, and superior …
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 …
Ngom et al. [18] fabricated c-oriented tungsten doped ZnO film by pulsed laser deposition.The composite of CuO–ZnO is important due to charge transfer [19] between the metal ions of these two materials.Datta et al. [20] studied CuO-modified ZnO random nanowire networks and demonstrated their sensitivity and selectivity towards H 2 S gas.Vertically conformal …
The current study is focused on fabrication of a ternary metal oxide nanocomposite (ZnO/CuO/Ag 2 O) as an efficient and superior photocatalyst by step-wise implanting of p-type CuO and Ag 2 O semiconductors onto an n-type semiconductor (ZnO) via a chemical method. The structural and textural characteristics of the manufactured samples …
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 ...
Mixed transition-metal oxides are emerging electrode materials, because of their higher electrochemical performances. In the present work, single-metal oxides, binary-metal oxides, and ternary mixed-metal oxides (MMOs) of zinc oxide (ZnO), nickel oxide (NiO), and copper oxide (CuO) are successfully prepared by simple gel-combustion process. The …
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 ...
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 ...
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 ...
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 …
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) …
In this work, mesoporous (pore size below 4 nm) composite nanoparticles of ZnO–Ag 2 O/Ag, ZnO–CuO, and ZnO–SnO 2 of size d ≤ 10 nm (dia.) have been synthesized through the in situ solvochemical reduction method using NaBH 4.These composite nanoparticles exhibited excellent killing efficacy against Gram-positive/negative bacterial and fungal strains …
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.