1. Introduction. Metal oxide semiconductors (MOS) have been an interesting topic in the field of materials research in recent years. Among various MOS, copper oxide (CuO) is a popular one due to its interesting structural, chemical, optical and electrical properties [1].CuO is a low energy band gap p-type semiconductor [2].It is one of the …
In this work, the structural defects and the thermal conductivity of CuO, ZnO, and CuO/ZnO nanowires have been studied, using molecular dynamics simulation with COMB3 potential.
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 …
In this work, we successfully synthesize Cu-doped ZnO samples via hydrothermal route. The prepared samples are characterized by X-ray diffraction (XRD) and Raman spectroscopy to confirm the formation of mixed-metal oxide phases, while the Seebeck and electrical measurements are performed to analyze the effect of these …
The images showed that Fe3O4, ZnO, and CuO particles had mean diameters of about 50 nm (spheroid), 25 nm (rod shape), and 75 nm (spheroid), respectively. Tests were performed under batch ...
The structure and morphology of CuO/ZnO and CuO photocathode were observed by SEM. The prepared ZnO, CuO, CuO/ZnO materials were as shown in Fig. 1 a–c, respectively. In which, the pure ZnO had white color while CuO and CuO/ZnO appeared black. Unlike the pure CuO, the hybrid materials also had tiny white spots on …
In the present work, CuO and Cu1-xZnxO were synthesized with the function of the Zn doping ratio by microwave-assisted chemical precipitation approach. The X-ray diffraction pattern shows that the mono-phase CuO with a mono-clinical structure and no other secondary phase has been observed for the Cu1-xZnxO with different Zn ratio and …
Cu in the CuO-ZnO nanocomposites can be studied using. X-ra y photoelectron spectroscopy (XPS). The XPS spectra. of Cu-doped ZnO show peaks at ~ 930 and 950 eV cor -. responding to the atomic term ...
In addition, the ZnO/CuO/Ext sample exhibits a change of 20 nm in absorbance to the UV region. This change may be related to the result of the quantum bound effect. However, the other NPs synthesised in the presence of propolis extract presented a wide absorption band in visible range associated with a sharp absorption in …
Pt@Cu-ZSM-5@CuO x catalyst was constructed for the catalytic oxidation of acetonitrile (AN), which achieved a complete mineralization rate and more than 95 % N 2 selectivity within 300–450 °C. Characterization results revealed that the satisfactory synergistic action of hydrolysis and oxidation pathways was well achieved.
ZnO/CuO and ZnO/CuO/rGO heterostructure were prepared by sol-gel synthesis route and were electrophoretically deposited on indium tin oxide (ITO) …
H2S is a common but hazardous impurity in syngas, biogas, or natural gas. For some advanced power generation technologies, such as integrated gasification combined cycle (IGCC), solid oxide fuel cells, H2S content needs to be reduced to an acceptable level. In this work, a series of highly porous Zn-Cu and Zn-Co composites …
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. …
In addition, a very weak diffraction peak of −COOH was found at 288.8 eV, indicating that the graphene oxide was reduced. 11 As shown in Figure Figure4 4 c, the binding energies of Zn 2p 3/2 and Zn 2p 1/2 are 1021.9 and 1044.8 eV, respectively, corresponding to Zn 2+ of ZnO. 37 The O 1s XPS spectrum of ZnO/rGO (Figure Figure4 …
The Raman spectra of the CuO and ZnO/CuO nanocomposite are recorded at room temperature and displayed in Fig. 3.Earlier reports have demonstrated that CuO nanoparticles with monoclinic structure and four atoms (two molecules) per unit cell belong to C 2 h 6 and has twelve phonon branches (Joya et al., 2019).There are three acoustic …
ZnO/CuO and ZnO/CuO/rGO heterostructure were prepared by sol-gel synthesis route and were electrophoretically deposited on indium tin oxide (ITO) substrate as a thin uniform layer using 1 V for 20 min at 50 mV/s. ZnO/CuO and ZnO/CuO/rGO heterostructure coated ITOs were then employed as the working electrode in a three …
Бөмбөлөгт тээрмийн доторлогоо нь бөмбөлөгт тээрмүүдийн орлуулах элэгдлийн гол хэсэг юм. Эдгээр доторлогоо нь элэгдэлд тэсвэртэй материал, нуранги материалаар хийгдсэн байдаг.
We synthesized ZnO, CuO, Cu doped ZnO with 1, 2 and 3 wt %, and for Cu additions at 6, 8, 10, 15, 30 and 50 wt% this resulted in ZnO–CuO composites with …
The CuO–ZnO heterostructures were prepared by a plethora of methods, including electrochemical deposition and radiofrequency magnetron sputtering. However, these techniques require a long ...
PDF | Өндөр энергийн бөмбөгөн тээрмийн (HEBM) аргаар 1.4 микрон хэмжээтэй цайрынисэл (ZnO)-ийг 1, 5, 8 цагийн ...
Zn oxide (ZnO) and CuO are n- and p-type semiconductors, respectively, with a band gap of 3.37 eV and 1.2 eV. Their conductivities are in the range 10 −7 –10 −3 …
ZnO–CuO heterostructure prepared by simple hydrothermal method. • The polymer stabilized ZnO–CuO composite shows excellent electrocatalytic activity toward …
This study investigated the removal of Cd2+, Cu2+, Ni2+, and Pb2+ from aqueous solutions with novel nanoparticle sorbents (Fe3O4, ZnO, and CuO) using a range of experimental approaches, including, pH, competing ions, sorbent masses, contact time, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. …
The p-CuO/n-ZnO heterojunction was fabricated by combining thermal oxidation and thermal evaporation techniques. The CuO was formed by thermal oxidation of Cu. Cu foils (thickness of 300 μm and purity of 99.99%) were thinned by mechanical swinging in a 2:1 vol solution of a mixture of Ferric Chloride and distilled water.
A method for green synthesis of ZnO/CuO nanocomposite using Theobroma cacao seed bark extract (TBE) has been investigated. ZnO/CuO nanocomposite synthesis aims to decrease a high band gap energy ...
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 ...
A 1:1 molar ratio of CuO/ZnO nanocomposite was prepared by sol–gel method. Copper sulphate pentahydrate (2.5 g) was dissolved in 100 ml distilled water while stirring and 2.2 g of zinc acetate dihydrate was dissolved in 100 ml distilled water separately. NaOH pellets were added in both the solutions while stirring to get a pH of more than 10.
In term of gas sensing the ZnO/CuO heterojunction thin film has better response for different gases as 8348% for H2S, 126% for CH4, 115% for CO, 185% for H2 and 134% for NH3 [9]. The n-ZnO/p-CuO heterojunction was enhances the charge collection and has reduced defect structures at nanostructured interface than others [10]. …
The electrodeposition of Zn and Cu–Zn alloy from ZnO/CuO precursors has been investigated in ChCl/urea-based DES. Electrochemical measurements showed that …
CuO-ZnO heterojunction promotes the kinetics of LiPSs-redox and the interfacial charge transfer. The battery with the heterojunction has a good discharge capacity in the long-term cycle, with a discharge specific capacity of 1282.08 mAh g −1 for the first cycle and 200 mAh g −1 for the 800th cycle at 0.5C. On the other hand, introducing a ...
The CuO-ZnO in NaOH electrolyte exhibits a high specific capacitance of 313 F/g at 2 A/g current density. The GCD curve for the best electrode material CuO-ZnO in NaOH at various current densities 2, 3, 4 and 5 A/g is shown in Figure 9 (b). The CuO-ZnO in NaOH electrolyte has specific capacitance at 313, 146, 100 and 89 F/g.