The biosynthesis of CuO/Cu 2 O-ZnO NCs was carried out using a simple microwave oven (2.45 GHz and 700 W). The equimolar (0.01 M) solutions of Cu(CH 3 COO) 2 ·H 2 O and Zn(CH 3 COO) 2 ·2H 2 O were mixed in different ratios, i.e., 90:10, 80:20, 70:30, and 60:40 to make a total volume of 200 ml. A 20 ml leaf extract was …
CuONPs was produced as follows. Firstly, 2.5 g of Cu(CH 3 COO) 2 ·H 2 O were added in 10 mL of H 2 O with stirring at 80 °C. The AG leaf extract solution was kept at pH 7 using an alkaline solution. Then, 30 mL of AG solution was gradually dropwised into the Cu 2+ solution under continuously stirring at 80 °C. This process was prolonged …
The synthesis of ZnO/CuO films on ITO substrate was realized in two steps, first ZnO was deposited electrochemically and then CuO nanoparticles were precipitated with help of spin coating technique. ZnO nanorods were obtained in aqueous Zn(NO3)2 solution, in presence of KCl as capping agent. Spin coating technique yielded CuO …
The electrons movement of ZnO/CuO NCs/GCE working electrode was estimated applying cyclic voltammetric (CV) analysis of 0.1 mM solution of Fe(CN) 6 3−/4-in 7.0 pH of phosphate buffer presenting in Fig. 4 (a). The oxidation and reduction peaks of modified GCE perceived at Fig. 4 (a) have seemed at +0.38 V and +0.10 V individually ...
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 …
Chemicals. Polylactic acid granules with 99% purity were prepared from the Khatam Polymer Company (Iran, Tehran). Copper oxide nanoparticles (with 99% purity, and particle size of 30–60 nm) and zinc oxide (with 99% purity, and particle size of 30–70 nm) were purchased from the Nanogiluzac Company (Iran, Tehran). 2, 2-Diphenyl-1 …
The FTIR spectra of the different solvents assisted ZnO/CuO samples are shown in Fig. 2.In Fig. 2 the broad absorption bands observed at~3418 and ~1635 cm −1 correspond to the O–H stretching and the bending vibrations of H 2 O. The broad peak observed in the range 460–560 cm −1 is the combination of Cu–O and Zn–O vibrations, …
The synthesis of ZnO/CuO films on ITO substrate was realized in two steps, first ZnO was deposited electrochemically and then CuO nanoparticles were precipitated with help of …
The ZnO/CuO/ZnFe2O4 nanocomposite is composed of symbiotic crystals of ZnO, CuO and ZnFe2O4, which enable the nanocomposite to show absorption in the UV, visible and NIR light regions and to produce a transient photocurrent in the presence of H2O2 under NIR irradiation. The full-spectrum photoFenton-like catalyst shows …
This article reviews the synthesis techniques of the CuO-ZnO nanocomposite and its morphology. Various practical applications of the CuO-ZnO nanocomposites have also …
This study focused on the synthesis of copper oxide nanoparticles (CuO NPs), zinc oxide nanoparticles (ZnO NPs), and a bimetallic CuO-ZnO nanocomposite (CZ NC) through …
The chemical states of the compositional elements in CuO/ZnO nanocomposites were characterized by XPS as shown in Fig. 4.The survey XPS spectrum in the Fig. 4 (a) shows Zn, Cu, C, and O peaks which confirm that Cu, Zn, and O appeared at the surface of CuO/ZnO nanocomposites. For C1s neutral carbon peak at a binding …
The ZnO-CuO nano composite materials shows the. best antibacterial activity with an apparent zone of 1.9 mm for E.coli, 1.7 mm for S.aureus and. 1.4 mm for Pseudomonas aeruginosa. 4. Conclusions ...
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°.
ZnO–CuO nanocomposite exhibits significant photodegradation for methylene blue dye with 97.93% degradation efficiency. The obtained results confirm that ZnO–CuO nanocomposite shows effective antibacterial activity against human pathogens. In summary green synthesised ZnO–CuO nanocomposite can possibly be used in waste …
1,656,000 تومان. توپی فرز تونیک ابرویی دامار مدلDMRP21B1081-50. امتیاز: 4,500,000 تومان. توپی پیش فرز لبه چسبان دامار پلاس مدل 125.54.30.Z4+4LH قطر 125. 25,900,000 تومان. توپی پرداخت مارپیچ فرود مدل TM06M AD3. 27,690,000 تومان. توپی ...
This study was conducted to evaluate the effects of adding cinnamon nanoparticles (NPs), Zinc oxide (ZnO) nanoparticles (NPs), and Copper oxide (CuO) NPs on the antibacterial property of a luting and lining glass ionomer cement (GIC) that was used for the cementation of orthodontic bands to the tooth. Cinnamon NPs, ZnO NPs, …
We propose the synthesis of β-triketonate complexes of Zn(II) and Cu(II) as precursors in the photo-deposition of ZnO films loaded with CuO, which are subsequently calcined at …
Specific ZnO and CuO NPs were weighed in the preceding step to create three different NC ratios. The compositions of these NCs are as follows: ZnO: CuO in ratios of 0.75:0.25 (abbreviated as Zn 3 CuO x), 0.25:0.75 (abbreviated as ZnCu 3 O x), and 0.5:0.5 (abbreviated as ZnCuO x).The details of these NCs are presented in Table 1.The …
Regarding the formation of the 3D flower-like ZnO–CuO nanocomposite, the schematic illustration of the formation mechanism is presented in Fig. 4, and the further discussion is proposed as follows.It is well known that shape control of the nanocrystals can be achieved by manipulating the growth kinetics [25], [26], [27].In the present case, the …
Hydrothermal synthesis was used to obtain pure, doped and composite semiconductor oxide materials. We synthesized ZnO, CuO, Cu doped ZnO with 1, 2 and 3 wt %, and …
Likewise, CuO, CuO/ZnO, CuO/Mn 3 O 4 and CuO/Mn 3 O 4 /ZnO were excited at ~ 449 nm and their spectra recorded (Fig. 5c). The first peak in the emission spectrum of CuO at ~ 487 nm could be ...
CuO/ZnO composites were synthesized by a liquid phase method. Typically, 0.03 g of ZnO, 0.0421 g of 2-MI and different amounts of Cu(NO 3) 2 ·3 H 2 O (0.0376 g, 0.0439 g, 0.0691 g, respectively) are dispersed in 30 mL N, N-dimethylformamide (DMF) solution. Then, the mixed solution is stirred for 1 h, and sonicated for 3 min in order to …
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.
Fig. 1 shows the morphology images of pure ZnO and CuO/ZnO composites. It can be clearly seen from Fig. 1 (a) that the ZnO particles grown by thermal evaporation exhibit a tetrapod-shaped whisker morphology. After CuO and ZnO with different ratios are mixed together and ground, the tetrapod-shaped whiskers no longer exist; instead, …
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 …
This work focused on employing Calotropis gigantea leaf extract as reducing agent/fuel and (Zn(NO3)2.6H2O), (Cu(NO3)2.3H2O) as precursors to synthesise ZnO–CuO nanocomposite by solution combustion method. Prepared nanocomposites were characterised using x-ray powder diffraction (XRD), scanning electron microscope …
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.
We revealed that this bifunctionality is originated from the valence change mechanism of Cu, meaning that ZnO/Cu 2 O and ZnO/CuO play the photoelectric catalytic roles in charge and discharge processes, respectively. This work paves the way to introduce a facile and efficient method for the development of integrated single-cell …
In this work, mesoporous (pore size below 4 nm) composite nanoparticles of ZnO–Ag2O/Ag, ZnO–CuO, and ZnO–SnO2 of size d ≤ 10 nm (dia.) have been synthesized through the in situ solvochemical reduction method using NaBH4. These composite nanoparticles exhibited excellent killing efficacy against Gram-positive/negative bacterial …