The electrochemical behaviour of pre-oxidized copper surfaces prepared by heating in air at 90 °C was studied to evaluate the impact of the air-formed oxide layer at the copper surface on the corrosion in an aggressive chloride medium. ... This paper presents a facile method to fabricate nanostructured copper-oxide (Cu 2 O/CuO) …
The formation of copper oxide occurs by the release, in the hydrolysis process, of monosaccharides (glucose and others) and/or oligomers of reducing sugars. ... Preparation and evaluation of a kind of bacterial cellulose dry films with antibacterial propert. Carbohydrate Polymers, 84 (2011), pp. 533-538.
This paper will report the results from a fundamental study undertaken to evaluate the performance of a semi-aqueous fluoride formulation in removing copper oxide films of controlled thickness grown on copper. The thickness and composition of the oxide films were determined electrochemically using cathodic reduction technique.
In order to evaluate the effect of dilute sulfuric acid on the mineralogy, petrography, and chemistry of rock fragments, 15 oxide rock samples in the size range 3–3.5 in. (7.5–9.0 cm) were selected from the western dump of the Sarcheshmeh copper mine. Each sample was split into two parts so that there were two groups of 15 portions.
Copper oxide nanoparticles were synthesized by biological method using aqueous extract of Acalypha indica leaf and characterized by UV–visible spectroscopy, XRD, FT-IR, SEM TEM and EDX analysis. The synthesised particles were highly stable, spherical and particle size was in the range of 26–30 nm.The antimicrobial activity of A. …
In recent times, nanoparticles are attributed to green nanotechnology methods to know the synergistic biological activities. To accomplish this phenomenon, present study was aimed to synthesize copper oxide nanoparticles (CuO NPs) by using Syzygium alternifolium stem bark, characterized those NPs using expository tools and to …
Faisal, S. et al. Curcuma longa mediated synthesis of copper oxide, nickel oxide and Cu–Ni bimetallic hybrid nanoparticles: Characterization and evaluation for antimicrobial, anti-parasitic and ...
The performed investigations show that one needs to consider the action of the acid on the copper oxide-containing rocks at the microscopic level. In this …
Mineralogy, petrology, and chemistry studies to evaluate oxide copper ores for heap leaching in Sarcheshmeh copper mine, Kerman, Iran J Hazard Mater. 2008 Jun 15;154(1-3) :602-12. doi ... The performed investigations show that one needs to consider the action of the acid on the copper oxide-containing rocks at the microscopic level. In …
In this paper, we describe research carried out on oxide samples from the western dump of the Sarcheshmeh copper mine. Each sample was split into two parts …
1876-5319/11. the resulting copper interconnections are expected to be more migration-resistant than silver interconnections. There are two challenges in using copper oxides …
Volume 73, Issue 1. https://doi/10.1177/0003702818797959. Contents. PDF / ePub. More. Abstract. An ultraviolet visible (UV–Vis) spectroscopy method was …
Abstract. This study aims to provide an updated survey of the main synthesis methods of copper oxide (CuO) nanoparticles in order to obtain tailored nanosystems for various biomedical applications. The synthesis approach significantly impacts the properties of such nanoparticles and these properties in turn have a …
Environmentally friendly copper oxide nanoparticles (CuO NPs) were prepared with a green synthesis route without using hazardous chemicals. Hence, the extracts of mint leaves and orange peels were ...
Copper(II) oxide, CuO(s), (HARMFUL, DANGEROUS TO THE ENVIRONMENT) – see CLEAPSS Hazcard HC026. The copper(II) oxide powder can be provided in approximately 1 g quantities in labelled …
European Medicines Evaluation Agency (EMEA)—Veterinary Medicines Evaluation Unit . Copper Chloride, Copper Gluconate, Copper Heptanoate, Copper Oxide, Copper Methionate, Copper Sulphate and Dicopper Oxide—Summary Report. European Medicines Evaluation Agency (EMEA); London, UK: 1998. [(accessed on 2 …
Using a component having an amine group (−NH 2) or a carboxyl group (−COOH) for a cleaning solution, the etching rates of copper oxide and copper were analyzed by measuring the solubility of copper to evaluate the etch residue removal properties.Based on this, it was attempted to establish the basis of a cleaning process for …
Maximum value of viscosity rise is 82% for 0.5% CuO sample at 35 °C as compared to base oil. Dispersion stability of samples containing 1 and 1.5% weight proportion of CuO Nano particles is poor. While the samples containing 0.25 and 0.5% weight proportions exhibit fairly good dispersion stability.
Abstract. The electrochemical behaviour of pre-oxidized copper surfaces prepared by heating in air at 90 °C was studied to evaluate the impact of the air …
The purpose of the present research is to add copper oxide (CuO) nanoparticles to engine oil and evaluate the produced changes in some of its properties. Also, viscosity, pour point, and flash point of nanolubricants, which are made at different concentrations (0.1, 0.2, and 0.5 wt.%), and also their thermal conductivity coefficient as …
The wide application and unique properties of graphene oxide (GO) make it to interact with other pollutants and subsequently alter their behavior and toxicity. ... Effect of graphene oxide on copper stress in Lemna minor L.: evaluating growth, biochemical responses, and nutrient uptake J Hazard Mater. 2018 Jan 5;341:168-176. doi: 10.1016/j ...
A S-doped-Cu catalyst excluding post-transition metal was shown to exhibit a high Faradaic efficiency of 92 % and a partial current density of 321 mA cm −2 toward formate in electrochemical CO 2 reduction reaction. This owes to the plenary grain boundaries and high retention of S−S bonds in CuS after electrolysis, while the latter …
The results indicate this particle is crystalline, it has no oxide phases, and so there are no mixtures of copper oxides and metallic phases in the structure. The size frequency histogram ( Fig. 1 D) it is evidenced that the size presented a wide distribution between 12–85 nm, with an average distribution of 42 nm.
Bimetallic Ru–Cu catalysts supported on SiO2 have been synthesized in microemulsions using sodium metasilicate (Na2SiO3), copper nitrate (Cu(NO3)2·3H2O) and ruthenium chloride (RuCl3) at 28 °C. The microemulsion system consists of sodium 1,4‐bis(2‐ethylhexyl) sulfosuccinate (AOT) and sodium dodecyl sulphate (SDS), …
Section snippets Materials and methods. In order to evaluate the effect of dilute sulfuric acid on the mineralogy, petrography, and chemistry of rock fragments, 15 oxide rock samples in the size range 3–3.5. in. (7.5–9.0 cm) were selected from the western dump of the Sarcheshmeh copper mine.. Each sample was split into two parts …
The positions of electronic band edges are one important metric for determining a material's capability to function in a solar energy conversion device that produces fuels from sunlight. In particular, the position of the valence band maximum (conduction band minimum) must lie lower (higher) in energy than the oxidation …
However, studies evaluating the effects of GO on the toxicity of other pollutants are scarce and inconsistent. For example, Hu et al. [24] ... Effects of graphene oxide and copper on the contents of Cu, B, P, Mn, Fe, Co, and Zn in L. minor at copper concentrations of 5 ...
The wide application of copper oxide nanoparticles (CuO NPs) in industry, agriculture, environmental remediation, and biomedicine has increased the risk of human …
X-ray diffraction studies revealed that these copper-based oxide nanoparticles display different crystal structures such as cubic (Cu 2 O), monoclinic (CuO) and orthorhombic [CuNa 2 (OH) 4]. The ...
X-ray diffraction studies revealed that these copper-based oxide nanoparticles display different crystal structures such as cubic (Cu 2 O), monoclinic …
8-hydroxyquinoline-N-oxide copper(II)- and zinc(II)-phenanthroline and bipyridine coordination compounds: Design, synthesis, structures, and antitumor evaluation
copper oxide. This affinity is seen with alkynes, aromatics, phenol, and alcohol. The agar well diffusion method was used to evaluate the antibacterial effectiveness of the generated copper nanoparticles and to identify the lowest inhibitory concentration. The zone of inhibition could be anywhere between 10 and 30 mm in length.
This paper reports the green synthesis of ZnO NPs from an aqueous extract of K. blossfeldiana and zinc nitrate hexahydrate as the Zn precursor. The formation of ZnO NPs was examined and characterized by different spectroscopic and microscopic techniques, including XRD, UV-Vis spectroscopy, PL, TEM, SEM and EDS.
