Table 1 lists the amount of raw materials required to prepare the catalysts. The catalysts were prepared through simple ball milling followed by calcination in air. Taking CuO-ZnO/qs as one example, 55.28 g of Cu 2 (OH) 2 CO 3, 9.3 g of ZnC 2 O 4 ·2H 2 O, and 40 g of SiO 2 were mixed and added to the ball-stirring mill (LM-2, Wuxi Xinbiao …
X-ray diffraction (XRD), spectroscopic, and microscopic methods were used to explore the crystallinity, optical properties, morphology, and other features of the CuO−ZnO …
The preparation of the CuO/ZnO heterojunction was schematic illustrated as shown in Fig. 1. A simple chemical solution strategy was then used to form Cu (OH) 2 /ZnO according to Eq. (1). (1) ZnO + CuCl 2 + H 2 O → ZnCl 2 + Cu OH 2 ↓. Download : Download high-res image (166KB) Download : Download full-size image.
Yuvaraj P. Sarnikar. In the present study, ZnO, CuO, CuO/ZnO, 5% Ag/CuO, 10% Ag/CuO, 5%Ag/ZnO, and 10% Ag/ZnO NPs were synthesized to develop bio-nano medicines with potent antibacterial ...
Abstract. Current study delineates the synthesis and environmental applications of ZnO/CuO nanocomposite in photocatalysis and gas sensing. The …
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°.
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) …
ZnO was significantly more efficient in PDS conversion and SO4•− generation than TiO2. For ZnO, the PDS increased the transformation rate of the trimethoprim antibiotic from 1.58 × 10−7 M s ...
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 ...
It confirms that the monoclinic phase of CuO is well matched with standard JCPDS (48–1548). The XRD pattern of ZnO/CuO-rGO nanocomposites is shown in Fig. 1 c. Due to the low amount of Cu 2+ in the ZnO lattice, the major peaks in this nanocomposite are from ZnO, and the minor peaks are from CuO [48]. Diffraction planes of the ZnO …
XRD at room temperature in Fig. 2 (a) pointed out that CuO and ZnO were successfully prepared on the substrate Al compared to the standard diffraction cards PDF#04-003-2106 and PDF#01-073-6372 for ZnO and CuO. In Fig. 2 (a) no prominent impurity diffraction peaks were detected. The ZnO diffraction peaks in the ZnO/CuO/Al …
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 …
3.1 Structural studies. X-ray diffraction analysis was employed to investigate both the phase purity and crystal structures of the CuO/ZnO composite …
3.1 XRD analysis. The XRD pattern of the ZnO thin film and heterostructured ZnO–CuO bilayer are displayed in Fig. 1. the diffraction pattern of the annealed ZnO(100 nm)–Cu(50 nm) composite at temperature of 200 and 400 °C in air ambient were compared with pure ZnO thin film.The diffraction peaks at 2θ = 31.8°, …
ZnO-CuO nanocomposites ( (CuO)x (ZnO)1-x) have been prepared by the facile co-precipitation method. The prepared nanocomposites have been studied using XRD, SEM, UV–Vis, FTIR, Raman, and ...
The heterojunction ZnO/CuO piezoelectric catalysts with different Zn/Cu molar ratios were synthesized by one-step polyacrylamide gel method. Various characterization techniques have been used to explore the phase structure and purity, composition, morphology, charge state, electronic energy level, optical and …
For this procedure the following characterizations were made: (1) XRD to check the crystal lattice of ZnO; (2) SEM to observe the rod-like morphology of the sample and with an average grain size ...
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.
The phases of deposits on the Ti substrate were investigated by X-ray diffractometer (XRD, Bruker D8 Advance, Germany), all patterns were tested under Cu-Kα radiation with an incident diffraction angle of 0.5° and the scanning step of 0.02°/s, the range for date recording was set as 20°-80° in 2θ. ... ZnO/CuO coatings: E corr = -0.261 …
The results of the XRD analysis exhibited that the pure CuO, ZnO and CuO/ZnO NC has a nanometer size with an average of 15.19 nm. The UV-vis analysis showed that the CuO, ZnO and CuO/ZnO NC has a ...
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. …
According to the results, CuO−ZnO NCs with 20 wt % CuO showed enhanced photocatalytic activity against dye with a 0.017 min−1 rate constant compared to 0.0027 min−1 for ZnO nanoparticles ...
CuO NPs increased the Cu content and ZnO NPs increased the Zn content significantly as exposure increased. • ZnO and γ-Fe 2 O 3 NPs promoted S. miltiorrhiza growth by increasing underground biomass and root diameter of plants.. 700 mg•kg-1 ZnO NPs increased the relative abundance of Humicola, Arenimonas, Thiobacillus and …
A similar XRD diffraction spectrum was reported by Jeong et al. [51] for the dual active layer of IGZO thin film transistor, Khan et al. [52] for as-deposited multilayer ZnO/TiO 2 thin films and ...
XRD analysis of bio-fabricated CuO-NPs, ZnO-NPs and their nanocomposites at different ratios. The average sizes of the biosynthesized CuO-NPs obtained from the XRD analysis ranged from 3.0 to 10.5 nm, whereas those of the ZnO-NPs ranged from 3.0 to 43.5 nm (Table 1). According to the XRD analysis, the average size …
(a) Mott-Schottky plots of ZnO, ZnO/CuO, and ZnO/CuO/Au thin films (b) Stability test of ZnO/CuO/Au photoanode prepared at 0.5 mM concentration of copper acetate. The capacitance of the electric double layer at the interface (C) can be expressed as [ 71 ], (7) 1 C = 1 C H + 1 C C Where C H is the capacitance of the Helmholtz layer, …
Figure 1 shows the XRD patterns for ZnO and Ni-ZnO nanopowders in the range (2theta) = 25°–75°. The peaks of the pure sample correspond to the ZnO hexagonal wurtzite structure (JCPDS file ...
The synthesized CuO/ZnO photocatalyst exhibited a low bandgap energy of 2.4 eV, enabling efficient visible light absorption. The photocatalytic activity of the CuO/ZnO heterostructure was evaluated for the degradation of Methyl Orange (MO) dye and showed a high degradation efficiency of 99 % due to its excellent electron-hole charge separation.
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 …
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 …
This enzyme-free CuO-ZnO/GCE malathion sensor demonstrates outstanding stability and excellent detection performance under optimal operating conditions with a wide linear range of malathion from 0 ...
