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.

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.

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.