In this work, CuO nanoparticles (CuO NPs) was prepared by a simple and green method using Rosmarinus officinalis extract containing phenolic constituents as both the chelating and the stabilizing agents. CuO nanoparticles/polyorthoaminophenol composite (CuO NPs/POAP) as electro-active electrodes for electrocatalytic oxidation of methanol with good uniformity are prepared by electropolymerization. Composite of CuO NPs/POAP was synthesized by cyclic voltammetry (CV) methods and electrochemical properties of film were investigated by using electrochemical techniques. New composite modified electrode shows a significantly high response for methanol oxidation. This method of synthesis of the catalyst and composite has the advantages of high yields, elimination of chemical reagent and simple methodology. Catalytic efficiency remains unaltered even after several repeated cycles.

In this work, a simple and low cost modified hydrothermal method was used to prepare CuO-ZnO nanostructures. The innovation of this work is to modify hydrothermal method by flowing nitrogen gas during the reaction. Structural, morphological, optical, and chemical species of grown crystals were studied using the techniques of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), high-resolution transmission electron microscopy HRTEM, x-ray photoelectron spectroscopy (XPS), UV/Vis spectroscopy and photoluminescence (PL). Specifically, XRD analysis shows that the sample has hexagonal structure with no phases of impurity indicating the Zn ions have been effectively integrated into the standard CuO crystal structure. The parameters of the lattice, the length of the unit cell and the crystallite size were determined from the XRD pattern of the CuO-ZnO sample and it was noticed that the crystallite size ranged from 17 nm to 26 nm. The SEM micrographs of the sample CuO-ZnO revealed that the prepared sample exhibited nanorods-like structure. The XPS spectrum proved the presence of Cu+2 and Zn+2 elemental forms. It is also observed that the XPS spectrum was free from other peaks related to impurities which indicating that the prepared sample was pure. The optical characterization recorded that the energy gap was around 2.51 eV while PL spectrum showed blue and red orange emissions originated from CuO- ZnO nanostructures.

The preparation of trans-dihydrofurans has been achieved by a one-pot condensation reaction of 4-bromophenacyl bromide, aromatic aldehydes and 5, 5-dimethyl-1, 3-cyclohexanedione using biosynthesized CuO nanoparticles under reflux conditions in ethanol. CuO nanoparticles (CuO NPs) were prepared using extract of leaves of Ajuga chamaecistus Subsp. Scoparia. The key advantages of this process are the diastereoselective synthesis, reusability of the catalyst, low catalyst loading, excellent yields, short reaction times, simple workup and environmentally benign. Fully optimized structures of trans and cis dihydrofurans were obtained by B3LYP/6-31G(d, p) method. The structures of the prepared trans-2, 3-dihydrofurans were fully characterized by 1H and 13C NMR spectra, IR spectra, and elemental analysis.

In this research, the synthesis of copper oxide nanoparticles was performed using Cu(acac)2 precursor. Copper oxide nanoparticles were synthesized by combustion method. Identification of synthesized nanomaterials was performed using PXRD (powder X-ray diffraction) technique. The physical properties of synthesized materials were also evaluated using UV-Vis (ultraviolet-Visible), FT-IR analyzes. It also examined the size and morphology of the materials through the FESEM (scanning electron microscopy field) and TEM (transient electron microscopy). The energy band gap of nanomaterials was studied, with an optical band gap of about 4. 58 eV. An electrochemical sensor was developed using nanoparticles that the sensor is capable of bisphenol A breaks down. The results of this sensor seem to be desirable and suggest that the oxidation peak potential of the bisphenol A at a surface of CuO nanoparticle modified carbon paste electrode (CuO/NPs/MCPE) appeared at 450 mV that was about 60 mV lower than the oxidation peak potential at the surface of the carbon paste electrode (CPE). At a best condition in voltammetric analysis, the oxidation peak current of bisphenol A showed linear dynamic range (in 0. 1– 400 μ M) with a detection limit of 0. 067 μ M, using square wave voltammetry (SWV) method. The CuO/NPs/MCPE was successfully applied for the analysis of bisphenol A in food samples.

Electrochemical properties of various rock-shaped-CuO/graphite (G) composites and monoclinic structure CuO nanoparticles as the cathode versus a zinc plate as the anode in a 4M NaOH electrolyte were elucidated by electrochemical impedance spectroscopy (EIS) and chronopotentiometry (CP) in a two electrode configuration cell.Various values of G 9, 16 and 28 wt% were prepared and studied as cathode materials for an alkaline Zn-CuO Battery. The EIS results demonstrated that increasing the mass ratio of G caused significant decrease in charge transfer resistance (Rct) and capacitive behavior of the electrode. Also, the discharging voltage of the cells was increased due to raising the mass ratio of the graphite. Besides, electrochemical properties of the monoclinic structure CuO nanoparticles as cathode material in the alkaline battery was compared with a rock shaped CuO particles. The results showed that the discharged voltage of monoclinic CuO nanoparticles is less than another rock shaped CuO nanoparticles form.

In this paper, the photocatalytic degradation of Lidocaine HCl, an anesthetic was investigated in aqueous solution using CuO/ZnO as a photocatalyst. The degradation was studied under different conditions including the amount of the photocatalyst, irradiation time, initial concentration of drug, pH of the system, initial concentration, addition of oxidant on the reaction rate and anion presence.The results showed that the photocatalytic degradation of Lidocaine HCl was strongly influenced by these parameters. The best conditions for the photocatalytic degradation of Lidocaine HCl were obtained. The optimum amount of the photocatalyst used is 0.48 g/L. The photodegradation efficiency of Lidocaine HCl increases with the increase of the illumination time. It was found that the photodegradation efficiency decreased with increasing the initial concentration of Lidocaine HCl. The photodegradation efficiency of Lidocaine HCl was accelerated by adding a small amount of H2O2. The possible roles of the additives on the reactions and the possible mechanisms of effect were also discussed.

In this research, one-pot, four-component reaction of phthalic anhydride, hydrazine hydrate, aromatic aldehydes, and malononitrile has been described to afford pyrazolophthalazine derivatives in the presence of CuO nanoparticles in ethanol under reflux conditions. Using nontoxic and nano catalyst, simplified operational process, short reaction times, excellent yields, ease of purification of the products without using chromatographic separation, and environmentally benign reaction condition are the remarkable advantages of this synthetic strategy.

With the progress of various industries, the ever-increasing production of polluting wastewater has faced mankind with the concern of preserving the environment and providing clean water. The simultaneous use of adsorbents such as natural zeolite and nanophotocatalysts is one of the attractive methods. By doing this, while eliminating the limitations of each, synergy in properties occurs and the performance of pollution removal is improved. In this article, TiO2/CuO nanocomposite was deposited on natural zeolite particles. The produced samples were evaluated and compared with different analyses. The results showed that the presence of the TiO2-7. 5% CuO (TC) nanoparticles has improved the ability to absorb UV light despite reducing the specific surface area. The performance of the zeolite-TC combination on the removal of methyl orange (MeO) showed acceptable results. The zeolite sample containing 15%TC with a specific surface area of 29 m2/g and band gap of 3. 08 eV removed 93% of MeO dye after 120 min.