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The observed bandgap for zinc oxide (ZnO), copper oxide (CuO), tin oxide (SnO2), and ZnO/CuO/SnO 2 was noticed as 3.18 eV, 1.3 eV, 3.5 eV, and 2.0 eV, respectively. The ZnO/CuO/SnO 2 nanocomposite was applied to degrade the fast green dye under visible light irradiation and exhibited 93.68% degradation efficiency within a …
Carbon-coated ZnO/CuO nanoparticles anchored on reduced graphene oxide (ZnO/CuO/C/G) are constructed by using the redox reaction of elementary Cu in metal–organic framework-derived ZnO/Cu/C and graphene oxide (GO). The redox reaction endows a strong interaction between the resulting ZnO/CuO/C and reduced graphene …
Synthetic route for the preparation of CuO/ZnO nanocomposite. For the synthesis of CuO/ZnO nanocomposite, 1 g of each salt was dissolved in 100 mL of de-ionized water accompanied by the dropwise addition of 5 mL of 0.5 M NaOH. The reaction proceeded at continuous stirring and the temperature was set at 100 °C.
The photocatalyst degradation of ZnO/CuO nanocomposites with various concentrations of CuO was carried out using an optimum concentration of (10 mg/L) …
Polyethyleneglycol-coated biocompatible CuO–ZnO nanocomposites were fabricated hydrothermally varying Zn:Cu ratios as 1:1, 2:1, and 1:2, and their antibacterial activity was determined through ...
Hydrothermal synthesis was used to obtain pure, doped and composite semiconductor oxide materials. We synthesized ZnO, CuO, Cu doped ZnO with 1, 2 and …
Arsenic (III) exposure, often from contaminated water, can have severe health repercussions. Chronic exposure to this toxic compound is linked to increased risks of various health issues. Various technologies exist for arsenic (III) removal from contaminated water sources. This work synthesized ZnO-CuO nanocomposites through …
This article reviews the synthesis techniques of the CuO-ZnO nanocomposite and its morphology. Various practical applications of the CuO-ZnO nanocomposites …
Photocatalytic activity of (CuO-Cu 2 O)Cu/ZnO hetero-junction nanocomposites along with their luminescent, biological applications in the progress of anticancer and antibacterial agents is investigated. The Cu and Zn bi-components modified (CuO-Cu 2 O)Cu/ZnO nanocomposites were synthesized via facile combustion route in …
ABSTRACT. The uncontrolled release of hazardous dyes from textile industries without any pre-treatment has resulted in severe aquatic environment …
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 …
The p–n heterojunction nanocatalyst was successfully synthesized by decorating the surface of ZnO nanorods with CuO by using a low-temperature synthesis method. It was used as the driving force for the removal of tetracycline (TC) in water with mechanical stirring. Different ratios of ZnO/CuO piezoelectric nanocatalysts were …
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 force microscope (AFM), UV–Vis spectrophotometer, and fluorescence spectrometers were used to study the physicochemical properties of …
ZnO/CuO NPs have been synthesized using S. nigra L. extract via a green and simple method. e synthesized bimetallic NPs have been characterized by X-ray di˜raction (XRD), eld emission gun ...
Thus, the use of GH extracts for CuO–ZnO NCs synthesis has valuable importance. The current work describes a green approach for CuO–ZnO NC synthesis utilizing an aqueous extract of GH with an …
Hsu et al. showed that at a doping molar ratio of CuO:ZnO = 0.15:1, the sensitivity toward H 2 S gas reached 25% above that of the pure ZnO nanofibers [18]. Poloju et al. observed that Al-doped ZnO/CuO heterostructures have superior detection properties of NH 3 gas at RT relative to undoped ZnO or ZnO/CuO-based sensors [19]. •
The synthesis of optoelectrically enhanced nanomaterials should be continuously improved by employing time- and energy-saving techniques. The porous zinc oxide (ZnO) and copper-doped ZnO nanocomposites (NCs) were synthesized by the time- and energy-efficient solution combustion synthesis (SCS) approach. In this SCS …
Fig. 1 shows the thermal behaviour of the ZnO precursor. Organic and other volatile (H 2 O, NO x, CO x, N x O y, etc.) products are lost/removed at temperatures below 400–430 °C. The mass remains constant at higher temperature, indicating oxide formation. The DSC curve shows only one exothermic peak in the 250–480 °C range …
Fig. 1 shows the room temperature XRD patterns of ZnO (a), ZnO/CuO (b-g), and CuO (h).The indexation of all the peaks in the XRD patterns of the samples was by full pattern fitting method. The sample a (ZnO) shows the peaks corresponds to 010, 002, 011, 012, 120, 013 and 122 planes are in good agreement with hexagonal wurtzite ZnO …
ZnO/CuO heterohierarchical nanotrees array has been prepared via a simple hydrothermal approach combined with thermal oxidation method on Cu substrates. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometer(XRD) are employed to characterize and analyze t …
The XRD confirmed pure phases of ZnO and CuO, respectively and their crystallite sizes increased based on the reduction in the strength of the base (i.e., NaOH > NH 4 OH > urea). While that of ZnO–KOH showed higher crystallite sizes in comparison to other bases. ZnO–NaOH demonstrated a superior response among the tested sensors, …
The ZnO/CuO heterojunction system was analyzed by XRD, SEM and XPS; the results demonstrate low crystallinity of the films and the formation of ZnO and CuO. The results of optical properties confirm a gradual reduction of the optical bandgap when CuO loading is increased in the ZnO matrix and the photoluminescence tests found a …
Co-electrodeposition technique has been used to elaborate flower-like CuO/ZnO nanocomposites on aluminum (Al) foil and indium tin oxide (ITO) coated glass …
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 …
For ZnO-CuO C-S NWs, ZnO NWs are n-type semiconductor, while the CuO shell is p-type. When exposed to NO 2 with oxidizability, the sensor resistance decreases, and the response behavior follows the characteristic of p-type MOS to oxidizing gases. This implies that it is the CuO shell that plays a decisive role to sensing …
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 has been characterized using X-ray diffraction ...
CuO−ZnO NC synthesis, the majority of the methods utilize a variety of precursors as well as other reagents. A green chemistry approach, however, encourages the use of cheap, environmentally benign chemical substances and waste-free methods that eliminate chemical waste.35 Plant extracts
Fig. 1 (a) shows the X-ray diffraction (XRD) pattern of different samples of CuO-ZnO nanocomposite as well as pure CuO & ZnO NPs prepared by co-precipitation method. Both CuO and ZnO NPs showed a well resolved XRD peak with no impurities. The JCPDS cards confirmed that CuO has a (00–048-1548) and ZnO has a hexagonal wurtzite (00–036 …
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 the electronic modification effects on CuO–ZnO-derived electrocatalysts synthesized via hydrothermal synthesis. Although …
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 …
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 …
The use of hydrothermally synthesized CuO–ZnO electrodes enabled us to study the effects of the initial catalyst structure, composition, and oxidation state on …
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 …
3. Result and discussion3.1. X-ray diffraction analysis. The PVA/ZnO–CuO nanocomposite had its crystal and structural properties examined by XRD (Thermo Fisher Scientific) employing CuK radiation, with a wavelength (λ) of 1.5418 Å, using the 2 θ range of 5 to 8°.Fig. 2 a represents the diffraction pattern of the PVA/Zn/Cu nanocomposite …
Semiconductor photocatalysis is an effective method used to degrade organophosphorus compounds. Here, the potential of a commonly mixed oxide semiconductor, ZnO/CuO, has been examined to degrade methyl parathion. Sono-coprecipitation method was used to provide ZnO/CuO nanocomposites, and it was appl …
In this work, we report a simple synthesis process for the construction of CuO@ZnO p–n heterojunctions via the in situ deposition of p-type CuO nanoparticles on the surface of three dimensional ZnO. In …