Artykuły w czasopismach: „Copper hydroxide nanostructures”

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Jadhav, Vijaykumar V., Dipak V. Shinde, Supriya A. Patil, Manohar K. Zate, Samadhan Pawar, Ahmed Al-Osta, Rajaram S. Mane, K. N. Hui, K. S. Hui i Sung-Hwan Han. "Electrochemical Properties of Anodized Copper Hydroxide Nanostructures". Journal of Nanoengineering and Nanomanufacturing 4, nr 2 (1.06.2014): 168–72. http://dx.doi.org/10.1166/jnan.2014.1191.

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Buledi, Jamil A., Sidra Ameen, Saba A. Memon, Almas Fatima, Amber R. Solangi, Arfana Mallah, Fatemeh Karimi, Salima Malakmohammadi, Shilpi Agarwal i Vinod Kumar Gupta. "An improved non-enzymatic electrochemical sensor amplified with CuO nanostructures for sensitive determination of uric acid". Open Chemistry 19, nr 1 (1.01.2021): 481–91. http://dx.doi.org/10.1515/chem-2021-0029.

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Abstract This study displays the facile and fluent electrochemical determination of uric acid (UA) through exceptional copper oxide nanostructures (CuO), as an effective sensing probe. The copper oxide nanostructures were fabricated via an aqueous chemical growth method using sodium hydroxide as a reducing agent, which massively hold hydroxide source. Copper oxide nanostructures showed astonishing electrocatalytic behavior in the detection of UA. Different characterization techniques such as XRD, FESEM, and EDS were exploited to determine crystalline nature, morphologies, and elemental composition of synthesized nanostructures. The cyclic voltammetry (CV) was subjected to investigate the electrochemical performance of UA using copper oxide nanostructures modified glassy carbon electrode CuO/GCE. The CV parameters were optimized at a scan rate of 50 mV/s with −0.7 to 0.9 potential range, and the UA response was investigated at 0.4 mV. PBS buffer of pH 7.4 was exploited as a supporting electrolyte. The linear dynamic range for UA was 0.001–351 mM with a very low limit of detection observed as 0.6 µM. The proposed sensor was successfully applied in urine samples for the detection of UA with improved sensitivity and selectivity.

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Yarbrough, Ryan, Klinton Davis, Sheeba Dawood i Hemali Rathnayake. "A sol–gel synthesis to prepare size and shape-controlled mesoporous nanostructures of binary (II–VI) metal oxides". RSC Advances 10, nr 24 (2020): 14134–46. http://dx.doi.org/10.1039/d0ra01778g.

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A base-catalyzed sol–gel approach combined with a solvent-driven self-assembly process at low temperature is augmented to make highly mesoporous metal oxide nanostructures of manganese and copper, and hydroxide nanostructures of magnesium.

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Tran, Thi Ha, i Viet Tuyen Nguyen. "Copper Oxide Nanomaterials Prepared by Solution Methods, Some Properties, and Potential Applications: A Brief Review". International Scholarly Research Notices 2014 (17.12.2014): 1–14. http://dx.doi.org/10.1155/2014/856592.

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Cupric oxide (CuO), having a narrow bandgap of 1.2 eV and a variety of chemophysical properties, is recently attractive in many fields such as energy conversion, optoelectronic devices, and catalyst. Compared with bulk material, the advanced properties of CuO nanostructures have been demonstrated; however, the fact that these materials cannot yet be produced in large scale is an obstacle to realize the potential applications of this material. In this respect, chemical methods seem to be efficient synthesis processes which yield not only large quantities but also high quality and advanced material properties. In this paper, the effect of some general factors on the morphology and properties of CuO nanomaterials prepared by solution methods will be overviewed. In terms of advanced nanostructure synthesis, microwave method in which copper hydroxide nanostructures are produced in the precursor solution and sequentially transformed by microwave into CuO may be considered as a promising method to explore in the near future. This method produces not only large quantities of nanoproducts in a short reaction time of several minutes, but also high quality materials with advanced properties. A brief review on some unique properties and applications of CuO nanostructures will be also presented.

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Sepahvand, S., S. Ghasemi i Z. Sanaee. "Electric Field Enhanced Synthesis of Copper Hydroxide Nanostructures for Supercapacitor Application". Nano 12, nr 01 (styczeń 2017): 1750010. http://dx.doi.org/10.1142/s1793292017500102.

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Electric field enhanced approach has been used to synthesize different copper hydroxide morphologies as high-performance supercapacitors electrode materials. Employing this efficient, simple and low cost method, various shapes such as rod, flower and cube with an average grain size of 30[Formula: see text]nm to 1[Formula: see text][Formula: see text]m were obtained on the copper substrate. The results revealed that applied electric field considerably accelerates the formation time of nanostructures from several days to close to 1[Formula: see text]min, where some of the desired nanostructures were obtained even in 1[Formula: see text]s. The electrochemical properties of different morphologies were compared using cyclic voltammograms and charge/discharge tests and electrochemical impedance spectroscopy. The obtained results demonstrated that the two types of fabricated structures showed high maximum areal and specific capacitance of 42[Formula: see text]mF/cm2 and 178[Formula: see text]F/g at scan rate of 20[Formula: see text]mVs[Formula: see text], respectively, which make them excellent and promising electrode materials for supercapacitors.

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Jabbar, Saja Mohsen. "Synthesis of CuO Nano structure via Sol-Gel and Precipitation Chemical Methods". Al-Khwarizmi Engineering Journal 12, nr 4 (18.12.2017): 126–31. http://dx.doi.org/10.22153/kej.2016.07.001.

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CuO nanoparticles were synthesized in two different ways, firstly by precipitation method using copper acetate monohydrate Cu(CO2CH13)2·H2O, glacial acetic acid (CH3COOH) and sodium hydroxide(NaOH), and secondly by sol-gel method using copper chloride(CuCl2), sodium hydroxide (NaOH) and ethanol (C2H6O). Results of scanning electron microscopy (SEM) showed that different CuO nanostructures (spherical and Reef) can be formed using precipitation and sol- gel process, respectively, at which the particle size was found to be less than 2 µm. X-ray diffraction (XRD)manifested that the pure synthesized powder has no inclusions that may exist during preparations. XRD results showed the particles size of highest peak at 38.9°, was equal to (15.93nm). In addition, Fourier transform infrared spectroscopy (FT-IR) were used to describe the prepared CuO nanostructures absorption peak at 610 cm-1 which conﬁrms that the synthesized product is a pure CuO and may be attributed to Cu2O infrared active mode.

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Zou, Yun Ling, Yan Li, Nan Zhang i Jian Gang Li. "Prepared of Flower-Like CuO via CTAB-Assisted Hydrothermal Method". Advanced Materials Research 152-153 (październik 2010): 909–14. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.909.

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Flower-like CuO nanostructures have been prepared via cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. Here, CuCl2•2H2O was used as copper raw material, and sodium hydroxide was used as precipitate. The resulting CuO powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) pattern exhibited the nanocrystalline nature with monoclinic structure for the as-synthesized nanostructures. FESEM images indicated that the flower-like CuO nanostructures are composed of many interconnected nanosheets in size of several micrometers in length and width and 60-80 nm in thickness. The possible formation mechanism of flower-like CuO nanostructures was discussed.

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Scandurra, Antonino, Maria Censabella, Stefano Boscarino, Guglielmo Guido Condorelli, Maria Grazia Grimaldi i Francesco Ruffino. "Fabrication of Cu(II) oxide-hydroxide nanostructures onto graphene paper by laser and thermal processes for sensitive nano-electrochemical sensing of glucose". Nanotechnology 33, nr 4 (2.11.2021): 045501. http://dx.doi.org/10.1088/1361-6528/ac2d0b.

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Abstract Glucose electrochemical sensors based on nanostructures of CuO/Cu(OH)2 onto graphene paper were prepared by thermal (solid) and nanosecond pulsed laser (molten phase) dewetting of a CuO layer 6 nm thin deposited by sputtering. Dewetted systems, obtained without the use of any binder, act as array of nanoelectrodes. Solid state and molten phase dewetting produce nanostructures of copper oxide-hydroxide with different average size, shape and surface composition. Molten phase dewetting originates particles with size below 100 nm, while solid state dewetting produces particles with average size of about 200 nm. Moreover, molten phase dewetting produce drop-shaped nanostructures, conversely nanostructures derived from solid state dewetting are multifaceted. X-ray photoelectron spectroscopy (XPS) characterization revealed that the surface of nanostructures is formed by a copper(II) species CuO and Cu(OH)2. Shape of anodic branch of the cyclic voltammograms of glucose in alkali solution evidenced a convergent diffusion mechanism. Analytical performances in amperometric mode are as good as or better than other sensors based on copper oxide. Amperometric detection of glucose was done at potential as low as 0.4 V versus saturated calomel electrode by both types of electrodes. Linear range from 50 μM to 10 mM, sensitivity ranging from 7 to 43 μA cm−2 mM−1 and detection limit of 7 μM was obtained. Good analytical performances were obtained by laser dewetted electrodes with a low copper content up to 1.2 by atoms percentage of the surface. Analytical performance of the proposed electrodes is compliant for the determination of glucose both in blood serum, saliva or tear.

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Bhusari, Rutuja, Jean-Sébastien Thomann, Jérôme Guillot i Renaud Leturcq. "Morphology control of copper hydroxide based nanostructures in liquid phase synthesis". Journal of Crystal Growth 570 (wrzesień 2021): 126225. http://dx.doi.org/10.1016/j.jcrysgro.2021.126225.

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Diab, Mahmud, Karam Shreteh, Michael Volokh i Taleb Mokari. "Formation of Copper Oxide Nanotextures on Porous Calcium Carbonate Templates for Water Treatment". Molecules 26, nr 19 (7.10.2021): 6067. http://dx.doi.org/10.3390/molecules26196067.

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The necessity of providing clean water sources increases the demand to develop catalytic systems for water treatment. Good pollutants adsorbers are a key ingredient, and CuO is one of the candidate materials for this task. Among the different approaches for CuO synthesis, precipitation out of aqueous solutions is a leading candidate due to the facile synthesis, high yield, sustainability, and the reported shape control by adjustment of the counter anions. We harness this effect to investigate the formation of copper oxide-based 3D structures. Specifically, the counter anion (chloride, nitrate, and acetate) affects the formation of copper-based hydroxides and the final structure following their conversion into copper oxide nanostructures over porous templates. The formation of a 3D structure is obtained when copper chloride or nitrate reacts with a Sorites scaffold (marine-based calcium carbonate template) without external hydroxide addition. The transformation into copper oxides occurs after calcination or reduction of the obtained Cu2(OH)3X (X = Cl− or NO3−) while preserving the porous morphology. Finally, the formed Sorites@CuO structure is examined for water treatment to remove heavy metal cations and degrade organic contaminant molecules.

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Medvedeva, Xenia, Aleksandra Vidyakina, Feng Li, Andrey Mereshchenko i Anna Klinkova. "Reductive and Coordinative Effects of Hydrazine in Structural Transformations of Copper Hydroxide Nanoparticles". Nanomaterials 9, nr 10 (11.10.2019): 1445. http://dx.doi.org/10.3390/nano9101445.

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Shape-specific copper oxide nanostructures have attracted increasing attention due to their widespread applications in energy conversion, sensing, and catalysis. Advancing our understanding of structure, composition, and surface chemistry transformations in shaped copper oxide nanomaterials during changes in copper oxidation state is instrumental from both applications and preparative nanochemistry standpoints. Here, we report the study of structural and compositional evolution of amorphous copper (II) hydroxide nanoparticles under hydrazine reduction conditions that resulted in the formation of crystalline Cu2O and composite Cu2O-N2H4 branched particles. The structure of the latter was influenced by the solvent medium. We showed that hydrazine, while being a common reducing agent in nanochemistry, can not only reduce the metal ions but also coordinate to them as a bidentate ligand and thereby integrate within the lattice of a particle. In addition to shape and composition transformation of individual particles, concurrent interparticle attachment and ensemble shape evolution were induced by depleting surface stabilization of individual nanoparticles. Not only does this study provide a facile synthetic method for several copper (I) oxide structures, it also demonstrates the complex behavior of a reducing agent with multidentate coordinating ability in nanoparticle synthesis.

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Al-Wasidi, Asma S., Maram T. Basha, Reem M. Alghanmi, Eida S. Al-Farraj i Ehab A. Abdelrahman. "Functionalization of Sodium Magnesium Silicate Hydroxide/Sodium Magnesium Silicate Hydrate Nanostructures Using 2,3-Dihydroxybenzaldehyde as a Novel Nanocomposite for the Efficient Removal of Cd(II) and Cu(II) Ions from Aqueous Media". Separations 10, nr 2 (28.01.2023): 88. http://dx.doi.org/10.3390/separations10020088.

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Cd(II) and Cu(II) ions cause many diseases in humans. Therefore, they should be removed from water sources using simple and cost-effective adsorbents. Consequently, sodium magnesium silicate hydroxide/sodium magnesium silicate hydrate nanostructures were synthesized and functionalized using 2,3-dihydroxybenzaldehyde as a novel nanocomposite. Several instruments were used to characterize the synthetic products, such as an X-ray diffractometer (XRD), a Fourier-transform infrared spectrophotometer (FT-IR), an N2 adsorption/desorption analyzer, a CHN elemental analyzer, an energy-dispersive X-ray spectrophotometer (EDS), and a field emission scanning electron microscope (FE-SEM). The functionalization of the nanostructures with 2,3-dihydroxybenzaldehyde led to the disappearance of the XRD peaks of the nanostructures and the presence of a broad XRD peak at 2θ = 32°. In addition, the FE-SEM images revealed that the nanostructures consisted of spheres, cubes, and irregular shapes with an average grain size of 115 nm, and the nanocomposite consisted of spherical conglomerates consisting of needle-like shapes. The anticipated morphology following the functionalization of the nanostructures with 2,3-dihydroxybenzaldehyde resulted from the presence of 2,3-dihydroxybenzaldehyde on the backbones of the nanostructures. The EDS results showed that the nanostructures were composed of O, Na, Mg, and Si with weight percentages equal to 38.59%, 5.95%, 16.60%, and 38.86%, respectively. Additionally, the nanocomposite was composed of C, N, O, Na, Mg, and Si with weight percentages equal to 55.31%, 2.23%, 30.09%, 6.56%, 2.98%, and 12.83%, respectively. The synthesized nanostructures and nanocomposite samples were utilized for the efficient removal of cadmium and copper ions from aqueous media using the ion exchange and chelation adsorption procedures, respectively. Optimum conditions for removing the cadmium and copper ions were achieved at a pH, time, and temperature equal to 7.5, 80 min, and 298 K, respectively. The maximum uptake capacities of the synthesized nanostructures and nanocomposite samples toward cadmium ions were 89.44 mg/g and 155.04 mg/g, respectively, and the maximum uptake capacities of the synthesized nanostructures and nanocomposite samples toward copper ions were 103.73 mg/g and 177.94 mg/g, respectively. Moreover, the adsorption processes were exothermic, chemical, and followed the pseudo-second-order model and Langmuir equilibrium isotherm model.

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Nurfazliana, M. F., Sharul Ashikin Kamaruddin, Nayan Nafarizal, Hashim Saim, Jais Lias i Mohd Zainizan Sahdan. "Direct Growth of Copper(II) Oxide (CuO) Nanostructures Films via One-Step Chemical Bath Deposition by pH Variation". Applied Mechanics and Materials 773-774 (lipiec 2015): 637–41. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.637.

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An aqueous solution was prepared by mixing the copper(II) sulfate pentahydrate (CuSO4), lactic acid, sodium hydroxide (NaOH) and de-ionized (DI) water. Direct deposition of copper(II) oxide (CuO) nanostructures films on glass substrates was achieved by a simple, inexpensive and one-step chemical bath deposition method. The pH of the solution was varied at 11.7, 12.0, 12.3 and 12.6 and immersed at low temperature (90 °C). The influences of the pH solution towards the surface topography, morphology and thickness were investigated by a field emission scanning electron microscopy (FESEM), an atomic force microscope (AFM) and a surface profiler. Meanwhile, an X-ray diffractometer (XRD) was used to examine the structural properties of CuO films. The optical properties were measured by a UV-Vis spectroscopy. It was found that the grain size of the films decreases and the surface becomes smoother and more uniform by increasing the pH solution. The CuO nanostructures have high crystallinity with monoclinic structure which is preferentially grown along ( ) and (200) directions. Therefore, the film has great potential for gas sensor device.

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Hyam, Rajeshkumar Shankar, Jongseok Lee, Eunju Cho, Jeehyeong Khim i Haigun Lee. "Synthesis of Copper Hydroxide and Oxide Nanostructures via Anodization Technique for Efficient Photocatalytic Application". Journal of Nanoscience and Nanotechnology 12, nr 11 (1.11.2012): 8396–400. http://dx.doi.org/10.1166/jnn.2012.6673.

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Asmat-Campos, D., D. Delfin-Narciso, L. Juárez-Cortijo i R. Nazario-Naveda. "Influence of the volume of ascorbic acid in the synthesis of copper nanoparticles mediated by chemical pathway and its stability over time". IOP Conference Series: Earth and Environmental Science 897, nr 1 (1.11.2021): 012010. http://dx.doi.org/10.1088/1755-1315/897/1/012010.

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Abstract In the present investigation, the effect of ascorbic acid volume in the synthesis of copper nanoparticles (Cu NPs) mediated by chemical route and their stability over time was evaluated. For the synthesis, copper sulfate pentahydrate CuSO4 (5H2O) was used as a precursor agent and ascorbic acid (AA) as a reducing agent. Cu NPs was characterized by the following techniques: UV-Visible spectrophotometry to evaluate structural changes that are evidenced in the absorbance peak and atomic absorption spectrophotometry to define nanoparticulate concentrations material in the precipitated and supernatant phases generated. On the methodology it was possible to observe a controlled formation based on the increase in the volume of ascorbic acid in the presence of sodium hydroxide, noticing a production of Cu nanostructures with a tendency to oxidation over time. The UV-visible results showed characteristic surface plasmon resonance peaks of metallic copper for the colloid containing 1.2 mL of A.A; as well as a specific copper concentration of 0.14 ppm in the supernatant and 1519.1 ppm in the precipitate. It is also evidenced that the solution exhibits a rapid reaction on exposure to air by shifting the absorbance peak to 386 nm. In addition, it does not present notable photosensitivity with respect to exposure to sunlight.

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Lu, Yang-Ming, Chi-Feng Tseng, Bing-Yi Lan i Chia-Fen Hsieh. "Fabrication of Graphene/Zinc Oxide Nano-Heterostructure for Hydrogen Sensing". Materials 14, nr 22 (17.11.2021): 6943. http://dx.doi.org/10.3390/ma14226943.

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In this study, hydrogen (H2) and methane (CH4) were used as reactive gases, and chemical vapor deposition (CVD) was used to grow single-layer graphene on a copper foil substrate. The single-layer graphene obtained was transferred to a single-crystal silicon substrate by PMMA transfer technology for the subsequent growth of nano zinc oxide. The characteristics of CVD-deposited graphene were analyzed by a Raman spectrometer, an optical microscope, a four-point probe, and an ultraviolet/visible spectrometer. The sol–gel method was applied to prepare the zinc oxide seed layer film with the spin-coating method, with methanol, zinc acetate, and sodium hydroxide as the precursors for growing ZnO nanostructures. On top of the ZnO seed layer, a one-dimensional zinc oxide nanostructure was grown by a hydrothermal method at 95 °C, using a zinc nitrate and hexamethylenetetramine mixture solution. The characteristics of the nano zinc oxide were analyzed by scanning electron microscope(SEM),x-ray diffractometer(XRD), and Raman spectrometer. The obtained graphene/zinc oxide nano-heterostructure sensor has a sensitivity of 1.06 at a sensing temperature of 205 °C and a concentration of hydrogen as low as 5 ppm, with excellent sensing repeatability. The main reason for this is that the zinc oxide nanostructure has a large specific surface area, and many oxygen vacancy defects exist on its surface. In addition, the P–N heterojunction formed between the n-type zinc oxide and the p-type graphene also contributes to hydrogen sensing.

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Liu, Na, Di Wu, Haoxi Wu, Ce Liu i Fang Luo. "A versatile and “green” electrochemical method for synthesis of copper and other transition metal oxide and hydroxide nanostructures". Materials Chemistry and Physics 107, nr 2-3 (luty 2008): 511–17. http://dx.doi.org/10.1016/j.matchemphys.2007.08.026.

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Long, Kailin, Deyang Du, Xiaoguang Luo, Weiwei Zhao, Zhangting Wu, Lifang Si i Teng Qiu. "Facile synthesis of gold coated copper(II) hydroxide pine-needle-like micro/nanostructures for surface-enhanced Raman scattering". Applied Surface Science 311 (sierpień 2014): 666–71. http://dx.doi.org/10.1016/j.apsusc.2014.05.133.

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Szczęsny, Robert, Tuan K. A. Hoang, Liliana Dobrzańska i Duncan H. Gregory. "Solution/Ammonolysis Syntheses of Unsupported and Silica-Supported Copper(I) Nitride Nanostructures from Oxidic Precursors". Molecules 26, nr 16 (14.08.2021): 4926. http://dx.doi.org/10.3390/molecules26164926.

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Herein we describe an alternative strategy to achieve the preparation of nanoscale Cu3N. Copper(II) oxide/hydroxide nanopowder precursors were successfully fabricated by solution methods. Ammonolysis of the oxidic precursors can be achieved essentially pseudomorphically to produce either unsupported or supported nanoparticles of the nitride. Hence, Cu3N particles with diverse morphologies were synthesized from oxygen-containing precursors in two-step processes combining solvothermal and solid−gas ammonolysis stages. The single-phase hydroxochloride precursor, Cu2(OH)3Cl was prepared by solution-state synthesis from CuCl2·2H2O and urea, crystallising with the atacamite structure. Alternative precursors, CuO and Cu(OH)2, were obtained after subsequent treatment of Cu2(OH)3Cl with NaOH solution. Cu3N, in the form of micro- and nanorods, was the sole product formed from ammonolysis using either CuO or Cu(OH)2. Conversely, the ammonolysis of dicopper trihydroxide chloride resulted in two-phase mixtures of Cu3N and the monoamine, Cu(NH3)Cl under similar experimental conditions. Importantly, this pathway is applicable to afford composite materials by incorporating substrates or matrices that are resistant to ammoniation at relatively low temperatures (ca. 300 °C). We present preliminary evidence that Cu3N/SiO2 nanocomposites (up to ca. 5 wt.% Cu3N supported on SiO2) could be prepared from CuCl2·2H2O and urea starting materials following similar reaction steps. Evidence suggests that in this case Cu3N nanoparticles are confined within the porous SiO2 matrix.

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Xu, Minwei, Fei Wang, Mingshu Zhao, Sen Yang, Zhanbo Sun i Xiaoping Song. "Synthesis of copper oxide nanostructures via a composite-Hydroxide-mediated approach: Morphology control and the electrochemical performances as anode material for lithium ion batteries". Physica E: Low-dimensional Systems and Nanostructures 44, nr 2 (listopad 2011): 506–10. http://dx.doi.org/10.1016/j.physe.2011.09.030.

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Roohibakhsh, R., Hamid Reza Rezaie i Hekmat Razavizadeh. "Synthesis and Characterization of Cu-10-20wt%Ni Nanopowders by a Chemical Precipitation Route". Journal of Nano Research 16 (styczeń 2012): 141–51. http://dx.doi.org/10.4028/www.scientific.net/jnanor.16.141.

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In this research Cu-Ni nanostructure powders were prepared by using a chemical procedure including initial precipitating, calcining the precipitates and reducing the calcined powders. The influence of nickel contents on the characteristics of the synthesized powders was investigated. Copper and nickel sulfate and sodium hydroxide were used as raw materials. CuSO4.3Cu(OH)2, NiOOH and Ni(OH)2 precipitates were obtained by addition of sodium hydroxide into aqueous copper and nickel sulfate solution. Oxide powders were produced by calcinations of precipitates. Considering the information obtained from the TGA test, calcination was done on precipitates. Copper-nickel nanostructure powders were synthesized by reduction of calcined powders in a hydrogen atmosphere. Eventually powders were characterized by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Crystallite size of final synthesized powders was in the range of 30 to 33 nm.

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Li, Jie, Zhongxi Yang, Tianning Wang, Nana Yu, Lanju Sun, Chen Nie, Huaide Teng, Cheng Jin, Xiutong Chen i Haoran Geng. "Tailored products of dealloying as-sintered Al–Cu alloys in sodium hydroxide solutions". RSC Advances 5, nr 92 (2015): 75044–54. http://dx.doi.org/10.1039/c5ra12112d.

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Heli, Hossein, Naghmeh Sattarahmady i Fatemeh Pourbahman. "Synthesis of copper nanoshales from a Triton™ X-100/cyclohexane/water ternary microemulsion system". Journal of the Serbian Chemical Society 81, nr 4 (2016): 395–401. http://dx.doi.org/10.2298/jsc150423080h.

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Shale-like copper nanostructure was synthesized for the first time from a water-in-oil microemulsion medium comprising Triton? X-100/cyclohexane/water ternary system. The nanoshales were synthesized through chemical reduction by hydrazinium hydroxide in alkaline medium. The nanoshales were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) patterns.

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Ganga, B. G., i P. N. Santhosh. "Facile synthesis of porous copper oxide nanostructure using copper hydroxide acetate precursor". Materials Letters 138 (styczeń 2015): 113–15. http://dx.doi.org/10.1016/j.matlet.2014.09.116.

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Ghotbi, Mohammad Yeganeh, i Zahra Rahmati. "Nanostructured copper and copper oxide thin films fabricated by hydrothermal treatment of copper hydroxide nitrate". Materials & Design 85 (listopad 2015): 719–23. http://dx.doi.org/10.1016/j.matdes.2015.07.081.

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Zhou, Min, Ye Hu, Mauro Ferrari i Zhaohui Xie. "Self-Assembled Zinc/Copper Hydroxide Carbonates with Tunable Hierarchical Nanostructure". Journal of Nanoscience and Nanotechnology 11, nr 8 (1.08.2011): 7037–41. http://dx.doi.org/10.1166/jnn.2011.4234.

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Cabello, Ana P., Mayra A. Franco Murcia, María A. Ulla i Juan M. Zamaro. "Microreactor Based on Trimetallic Nano-Oxides Obtained by In Situ Growth from German Silver". Catalysts 13, nr 6 (25.05.2023): 932. http://dx.doi.org/10.3390/catal13060932.

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Nanostructured films of copper, zinc, and nickel oxides were obtained from a controlled oxidation of the ternary nickel silver (Cu-Zn-Ni) substrates through a one-pot, green, and low temperature vapor-based treatment. Brief contact of the alloy with ammonia and hydrogen peroxide vapors at room temperature originates a mixture of nanometric copper, zinc, and nickel oxides at its surface. The growths evolve with time and temperature, generating a layered film with highly dispersed copper nano-oxides/hydroxides on a base of zinc and nickel oxides. The composition, configuration, and way of obtaining these films make them green catalysts, which are highly active and stable for a carbon monoxide oxidation reaction.

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Ghotbi, Shabnam, Mohammed Abbas Mousa, Lateef Najeh Assi i SeyedAli Ghahari. "Effect of Sintering Temperature on the Properties of CuAlO2 Synthesized from Nanosized Precursors for Application in Smart Infrastructure Systems". Infrastructures 7, nr 7 (20.07.2022): 97. http://dx.doi.org/10.3390/infrastructures7070097.

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The current study aimed to evaluate the influence of different sintering temperatures on the properties of copper aluminum oxide (CuAlO2) pellets synthesized from copper oxide (CuO) and aluminum hydroxide (Al(OH)3) for application in smart infrastructure systems. The pellets were sintered at 400 K, 1000 K, and 1300 K, in the presence of nitrogen gas flow to reduce the amount of oxygen availability. The CuAlO2 sintered nanoparticles were chemically analyzed by X-ray diffractometry, and the nanostructure of the materials was studied by scanning electron microscopy. The transmittance of the sintered materials was examined by ultraviolet/visible (UV/Vis) spectrophotometry, and 88% transparency was observed for the pellets sintered at 1300 K. Electrical conductivity was measured at 0.905 mS/cm, indicating a semiconducting behavior.

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Lu, Jingwei, Gan Miao, Zhongshuai Gao, Ting Xu, Fangchao Li, Xiao Miao, Yuanming Song, Xiangming Li, Guina Ren i Xiaotao Zhu. "Nanostructured copper hydroxide-based interfaces for liquid/liquid and liquid/gas separations". Separation and Purification Technology 298 (październik 2022): 121573. http://dx.doi.org/10.1016/j.seppur.2022.121573.

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Shehata, F., M. Abdelhameed, A. Fathy i S. F. Moustafa. "Fabrication of Copper-Alumina Nanocomposites by Mechanochemical Routes". Journal of Nano Research 6 (czerwiec 2009): 51–60. http://dx.doi.org/10.4028/www.scientific.net/jnanor.6.51.

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Nanostructure composites of Copper-Alumina were successfully produced by new mechanochemical method using two different routes. First, route A was carried out by addition of coarse copper to aqueous solution of aluminum nitrate, and second, route B was also carried out by addition of coarse copper to aqueous solution of aluminum nitrate and ammonium hydroxide. In both routes, the mixtures were heated in air and milled mechanically to get the oxides powders of CuO and Al2O3. The CuO was reduced in preferential hydrogen atmosphere into fine copper. The composite powders have been cold pressed into briquettes and sintered in hydrogen atmosphere. The structure and characteristics of powders as well as sintered composites produced from both routes were examined by XRD, SEM, EDS, TEM and metallographic techniques. The results showed that, in both routes, nano-sized particles of alumina were formed and dispersed within the copper matrix. The structure revealed the formation of CuAlO2 spinel structure at copper alumina interface. Nanocomposites produced by route-B showed finer alumina particles of 30 nm compared to 50 nm produced by route-A resulting in improved properties in terms of relative density, macro and microhardness values.

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Feng, Yang, Zhiwen Wang, Ruixue Zhang, Yuanyuan Lu, Yuqing Huang, Hongxiang Shen, Xiaomeng Lv i Jun Liu. "Anti-fouling graphene oxide based nanocomposites membrane for oil-water emulsion separation". Water Science and Technology 77, nr 5 (20.12.2017): 1179–85. http://dx.doi.org/10.2166/wst.2017.634.

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Abstract Anti-fouling copper hydroxide nanowires (CHNs)-graphene oxide (GO) nanocomposites membrane was fabricated by a vacuum-assisted filtration self-assembly process. CHNs were covered on the surface and inserted into the interlayers of the GO nanosheets to form the rough surface and nanostructure channels. The membrane with water contact angles (CAs) of 53° and oil CAs of 155° exhibited superior stability, hydrophilicity, underwater superoleophobicity and ultralow oil adhesion, and hence it could separate the oil-water emulsion with a high efficiency of >99%. This membrane showed the combined advantages of high oil rejection rate and ultralow membrane fouling, making it promising for practical oil-water emulsion separation applications.

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Stepniowski, Wojciech J., Stevan Stojadinović, Rastko Vasilić, Nenad Tadić, Krzysztof Karczewski, Shoshan T. Abrahami, Josephus G. Buijnsters i Johannes M. C. Mol. "Morphology and photoluminescence of nanostructured oxides grown by copper passivation in aqueous potassium hydroxide solution". Materials Letters 198 (lipiec 2017): 89–92. http://dx.doi.org/10.1016/j.matlet.2017.03.155.

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Wang, Mang, Qixing Zhang, Qixian Xie, Lili Wan, Ying Zhao, Xiaodan Zhang i Jingshan Luo. "Selective electrochemical reduction of carbon dioxide to ethylene on a copper hydroxide nitrate nanostructure electrode". Nanoscale 12, nr 32 (2020): 17013–19. http://dx.doi.org/10.1039/d0nr02591g.

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Ghalkhani, Masoumeh, Azam Anaraki Firooz, Mina Ghanbari, Maryam Ghanbari, Bindu Patanair i Sabu Thomas. "Green synthesis of nonprecious metal-doped copper hydroxide nanoparticles for construction of a dopamine sensor". Future Medicinal Chemistry 13, nr 8 (kwiecień 2021): 715–29. http://dx.doi.org/10.4155/fmc-2020-0333.

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Background: Copper oxide nanoparticles doped with nonprecious metal species (Ni and Mn) were synthesized. Method: A glassy carbon electrode (GCE) was modified by drop-casting of nanostructure suspensions, constructing Ni:Cu(OH)2/GCE, Mn:Cu(OH)2/GCE and Cu(OH)2/GCE. Results: The voltammetric oxidation of dopamine (DA) by the constructed electrodes confirmed that the electrocatalytic oxidation of DA is a reversible, pH-dependent, diffusion-controlled process; the best response was obtained by Mn:Cu(OH)2/GCE. A sensitive calibration graph (0.664 μA/μM) was produced for DA in the concentration range of 0.3–10.0 μM, with a detection limit of 79 nM using Mn:Cu(OH)2/GCE. Conclusion: The Mn:Cu(OH)2/GCE possessed an accurate response toward DA with an acceptable selectivity, stability and antifouling effect, revealing the applicability of the Mn:Cu(OH)2/GCE for DA analysis in biological samples.

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Tian, Miao, Yuxue Zhong, Donglei Fu, Zhiqiang Liu, Liang Cui i Jingquan Liu. "Core–Shell Nanostructured Hybrid of Nickel Hydroxide Supported on Copper Hydroxide Nanorod Arrays Used as Advanced Supercapacitors with High Efficiency and Ultraperformance". Advanced Sustainable Systems 6, nr 3 (29.12.2021): 2100357. http://dx.doi.org/10.1002/adsu.202100357.

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Thangavel, K., K. V. Jayasree, V. Balaprakash, P. Gowrisankar, S. Sudha i E. Murugan. "Synthesis and Characterization of Pure and Magnesium (Mg) Doped CuO Nano Particles by Solid State Method". Sensor Letters 18, nr 2 (1.02.2020): 137–42. http://dx.doi.org/10.1166/sl.2020.4172.

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Pure and Magnesium (Mg) doped CuO nanoparticles were effectively prepared by solid state method using Copper Chloride (CuCl2 · 2H2O), Magnesium Chloride (MgCl2 · 6H2O) and Sodium Hydroxide (NaOH). The ITO/TiO2/CuO–M/Cu heterojunctions solutions were fabricated by Dr Blade method at a low reaction temperature of 400 °C. In this analysis the prepared nanostructure were exposed to structural, morphological and optical analysis. The X-ray diffraction peaks results divulged that the prepared nanoparticles are monoclinic structure of CuO which was evidenced from the JCPDS card No. 801916. Morphological analysis result exposed that pure CuO particles exclusively consist of agglomerated irregular spherical shape. The result of the elemental analysis confirmed the presence of Mg2+ in the doped samples. Fourier Transform Infra-Red Spectroscopy results reveals the structural modifications due to the presence of magnesium. Optical absorption measurement spectra demonstrates that band gap shift is due the proportion of Mg.

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Farsi, Hossein, Shokufeh Moghiminia, Majid Raygan, Elahe Dana, Seyyedamirhossein Hosseini, Mitra Behforooz, Tykhon Zubkov, Ian V. Lightcap i Zhihai Li. "Nanostructured Tungstate-Derived Copper for Hydrogen Evolution Reaction and Electroreduction of CO2 in Sodium Hydroxide Solutions". Journal of Physical Chemistry C 123, nr 42 (25.09.2019): 25941–48. http://dx.doi.org/10.1021/acs.jpcc.9b07133.

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Barozzi, Marco, Sabrina Copelli, Eleonora Russo, Paolo Sgarbossa, Maria Cristina Lavagnolo, Annalisa Sandon, Cristiana Morosini i Elisabetta Sieni. "Implementation of Magnetic Nanostructured Adsorbents for Heavy Metals Separation from Textile Wastewater". Sustainability 14, nr 18 (19.09.2022): 11785. http://dx.doi.org/10.3390/su141811785.

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In the framework of sustainability, water shortages and water pollution are two important aspects to be considered. Proposing efficient and low-impact technologies is of paramount importance to promote circular economies associated with the use of water in the industrial context, especially in the textile industry. In this work, the application of a set of magnetic nanostructured adsorbents (MNAs) to cleanse metal ions from textile wastewaters was studied and analyzed. MNAs were generated with a low-cost process, involving iron (II/III) salts (e.g., chlorides), sodium or ammonium hydroxide solutions, and graphene oxide, obtained from graphite by a modified Hummers’ method at room temperature. The shape and the size were studied with transmission electron microscopy. Adsorbents were tested with different metal ions (e.g., copper, chromium (III), and nickel). Metal ion concentrations were analyzed by means of inductively coupled plasma optical emission spectroscopy (ICP-OES), and adsorption isotherms were characterized. From the results, the MNAs exhibited the capability of removing metal ions up to a yield of 99% for Cr3+, 94.7% for Cu2+, and 91.4% for Ni2+, along with adsorption loads up to 4.56 mg/g of MNAs.

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Momeni, S., M. Farrokhnia, S. Karimi i I. Nabipour. "Copper hydroxide nanostructure-modified carbon ionic liquid electrode as an efficient voltammetric sensor for detection of metformin: a theoretical and experimental study". Journal of the Iranian Chemical Society 13, nr 6 (27.01.2016): 1027–35. http://dx.doi.org/10.1007/s13738-016-0816-z.

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Mosayebi, Elham, i Saeid Azizian. "Study of copper ion adsorption from aqueous solution with different nanostructured and microstructured zinc oxides and zinc hydroxide loaded on activated carbon cloth". Journal of Molecular Liquids 214 (luty 2016): 384–89. http://dx.doi.org/10.1016/j.molliq.2015.11.036.

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Yuan, Shuang, Dinghua Peng, Xianluo Hu i Jingming Gong. "Bifunctional sensor of pentachlorophenol and copper ions based on nanostructured hybrid films of humic acid and exfoliated layered double hydroxide via a facile layer-by-layer assembly". Analytica Chimica Acta 785 (czerwiec 2013): 34–42. http://dx.doi.org/10.1016/j.aca.2013.04.050.

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Frolova, Liliya A., i Olha V. Sergeyeva. "Plasma-Chemical Synthesis and Properties of Oxide Compounds of Cobalt". ECS Meeting Abstracts MA2022-02, nr 29 (9.10.2022): 2599. http://dx.doi.org/10.1149/ma2022-02292599mtgabs.

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To date, the possibilities of using metal oxide particles in various fields have been developed [1]. At the same time, their characteristics largely depend on the method of preparation, which usually determines their structure, size, and physicochemical properties [2]. Among the methods for obtaining nanosized particles, one can single out methods of green synthesis [3], electrochemical [4], electropulse [5], and plasmachemical [6] synthesis based on the reduction or oxidation of metal ions in solutions under favorable conditions, followed by aggregation of nanoparticles. The purpose of this work is to analyze the technology for the synthesis of cobalt oxide compounds using contact nonequilibrium low-temperature plasma and to determine the directions for its further improvement. The object of the study was the process of obtaining particles of cobalt oxide using contact non-equilibrium low-pressure plasma during the processing of a liquid medium. The study was carried out using laboratory equipment and software modules of the HSC Chemistry 5.11 package. To find the preliminary conditions for the formation of interphase boundaries, diagrams were used in the coordinates of the E-pH potential of the aquatic environment (Pourbaix diagrams). It has been established that, depending on the initial state of Co(OH)2 in solution, the mass fraction of oxygen in the precipitate can change. In this case, the addition of hydrogen peroxide leads to a decrease in the proportion of hydroxide compounds in sediments. X-ray phase analysis showed the presence of CoO, CoOOH, Co3O4, β-Co(OH)2, Co in dry sediments. It has been established that the particle sizes lie in the range of 10 – 110 nm. The micrographs confirm the agreement between the calculated values and the experimental data. The phase composition of the deposit is influenced by the following factors: current density and anion concentration, process temperature. Increasing the temperature increases the diffusion coefficient but requires a higher current density to produce a powder. It has been established that a decrease in the liquid layer contributes to an increase in the yield of oxide compounds. The results of the analysis allow us to conclude that when using the technologies of plasma-chemical processing of liquid media to obtain compounds of the ultra- and nanoscale range, it becomes necessary to choose the parameters that are optimal for this process. The results of the analysis allow us to conclude that this technology can be optimized by controlling the initial pH of the solution; use of the spent solution in a container with the initial solution for its acidification; refinement of the reactor block for treating the solution in a film mode or close to it; choice of rational parameters for sludge drying. Laurent S., Boutry S., Muller R. N. Metal oxide particles and their prospects for applications //Iron oxide nanoparticles for biomedical applications. – Elsevier, 2018. –P. 3-42. Wang L. et al. Rational design, synthesis, adsorption principles and applications of metal oxide adsorbents: a review //Nanoscale. – 2020. – Vol. 12. – №. 8. – P. 4790-4815. El Shafey A. M. Green synthesis of metal and metal oxide nanoparticles from plant leaf extracts and their applications: A review //Green Processing and Synthesis. – 2020. – Vol. 9. – №. 1. – P. 304-339. Lawrence M. J., Kolodziej A., Rodriguez P. Controllable synthesis of nanostructured metal oxide and oxyhydroxide materials via electrochemical methods //Current Opinion in Electrochemistry. – 2018. – Vol. 10. – P. 7-15. Gan Z. et al. A laser and electric pulse modulated nonvolatile photoelectric response in nanoscale copper dusted metal‐oxide‐semiconductor structures //Advanced Electronic Materials. – 2018. – Vol. 4. – №. 11. – P. 1800234. Shamanin I. et al. Plasmachemical synthesis and evaluation of the thermal conductivity of metal-oxide compounds for prospective nuclear fuel //Journal of Physics: Conference Series. – IOP Publishing, 2019. – Vol. 1145. – №. 1. – P. 012057.

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Sarmet, Julien, Christine Taviot-Gueho, Rodolphe Thirouard, Fabrice Leroux, Camille Douard, Insaf Gaalich, Thierry Brousse, Gwenaëlle Toussaint i Philippe Stevens. "Electrochemical Behavior of Morphology-Controlled Copper (II) Hydroxide Nitrate Nanostructures". Crystal Growth & Design, 6.03.2023. http://dx.doi.org/10.1021/acs.cgd.2c01468.

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Escamilla‐Roa, Elizabeth, Julyan H. E. Cartwright i C. Ignacio Sainz‐Díaz. "Chemobrionic Fabrication of Hierarchical Self‐Assembling Nanostructures of Copper Oxide and Hydroxide". ChemSystemsChem 1, nr 3 (2.08.2019). http://dx.doi.org/10.1002/syst.201900011.

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El Attar, Anas, Sanaa Chemchoub, Mamadou Diallo Kalan, Larbi Oularbi i Mama El Rhazi. "Designing New Material Based on Functionalized Multi-Walled Carbon Nanotubes and Cu(OH)2–Cu2O/Polypyrrole Catalyst for Ethanol Oxidation in Alkaline Medium". Frontiers in Chemistry 9 (4.02.2022). http://dx.doi.org/10.3389/fchem.2021.805654.

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In this work, copper(II) hydroxide (Cu(OH)2) and copper oxide (Cu2O) nanostructures are deposited on functionalized multi-walled carbon nanotubes/polypyrrole to report an efficient electrocatalyst for ethanol oxidation in alkaline medium. In the first step, the deposition of functionalized multi-walled nanotubes of carbon (F-MWCNTs) on the electrode surface was carried out using drop casting mode followed by the electrodeposition of polypyrrole (PPy) and copper nanoparticles (Cu-Nps) using galvanostatic mode. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were performed in order to study the morphology and the structure of the elaborated catalysts. Electrochemical characterization conducted by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) revealed that the introduction of functionalized multi-walled carbon nanotubes enhances the electric properties of the nanocomposites and offers a large active surface area. The prepared electrocatalyst was then tested in a solution of 0.1 M NaOH containing 0.2 M of ethanol showing high performance (7 mA cm−2 at 0.85 V vs Ag/AgCl) and good stability (over 1800 s) toward ethanol oxidation.

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Chodankar, Nilesh R., Su-Hyeon Ji, Young-Kyu Han i Do-Heyoung Kim. "Dendritic Nanostructured Waste Copper Wires for High-Energy Alkaline Battery". Nano-Micro Letters 12, nr 1 (12.12.2019). http://dx.doi.org/10.1007/s40820-019-0337-2.

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AbstractRechargeable alkaline batteries (RABs) have received remarkable attention in the past decade for their high energy, low cost, safe operation, facile manufacture, and eco-friendly nature. To date, expensive electrode materials and current collectors were predominantly applied for RABs, which have limited their real-world efficacy. In the present work, we propose a scalable process to utilize electronic waste (e-waste) Cu wires as a cost-effective current collector for high-energy wire-type RABs. Initially, the vertically aligned CuO nanowires were prepared over the waste Cu wires via in situ alkaline corrosion. Then, both atomic-layer-deposited NiO and NiCo-hydroxide were applied to the CuO nanowires to form a uniform dendritic-structured NiCo-hydroxide/NiO/CuO/Cu electrode. When the prepared dendritic-structured electrode was applied to the RAB, it showed excellent electrochemical features, namely high-energy-density (82.42 Wh kg−1), excellent specific capacity (219 mAh g−1), and long-term cycling stability (94% capacity retention over 5000 cycles). The presented approach and material meet the requirements of a cost-effective, abundant, and highly efficient electrode for advanced eco-friendly RABs. More importantly, the present method provides an efficient path to recycle e-waste for value-added energy storage applications.

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Duan, Huanan, Xiangping Chen, Joe Gnanaraj i Jianyu Liang. "Electrochemical preparation of nanostructured TiO2 as anode materials for Li ion batteries". MRS Proceedings 1127 (2008). http://dx.doi.org/10.1557/proc-1127-t01-02.

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ABSTRACTTiO2 is an attractive anode material for Li-ion batteries due to its high capacity, high mechanical stability during Li intercalation/deintercalation process, limited side reactions with the electrolyte, low cost, and environmental friendliness. In this study, titanium hydroxide gel films were prepared in acidic aqueous solutions of TiOSO4, H2O2 and KNO3 by potentiostatic cathodic electrosynthesis on various copper substrates, including planar Cu foil, mechanically polished planar Cu foil, and Cu nanorod arrays grown on Cu foil. Crystalline TiO2 films were obtained by heat treating the electrodeposited titanium hydroxide gel films at 500 oC in argon atmosphere. The morphology and microstructure of the TiO2 films were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). SEM results showed that after deposition, each Cu nanorod has been covered by a layer of TiO2 gel, forming a core-shell structure. The effects of Cu nanorod arrays on the morphology and the electrochemical property of the TiO2 deposits were discussed.

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Lu, Jingwei, Gan Miao, Zhongshuai Gao, Ting Xu, Fangchao Li, Xiao Miao, Yuanming Song, Xiangming Li, Guina Ren i Xiaotao Zhu. "Nanostructured Copper Hydroxide-Based Interfaces for Liquid/Liquid and Liquid/Gas Separations". SSRN Electronic Journal, 2022. http://dx.doi.org/10.2139/ssrn.4118429.

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Wang, Hai, Quang Nguyen, Jae W. Kwon, Jing Wang i Hongbin Ma. "Droplets Jumping from a Hybrid Superhydrophilic and Superhydrophobic Surface". Journal of Heat Transfer 139, nr 2 (6.01.2017). http://dx.doi.org/10.1115/1.4035578.

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The wetting condition effect of the condensation process on a hybrid superhydrophobic and superhydrophilic copper surface as shown in Fig. 1a was experimentally investigated. The superhydrophilic surface (Fig. 1b) consists of micro-flowers (CuO) and nanorods (Cu(OH)2) obtained by immersing the copper substrate into alkaline solution of 2.5 M sodium hydroxide and 0.1 M ammonium persulphate, and the superhydrophobic nanostructured surface (Fig. 1c) was formed by spin coating the Cytop on the hierarchically structured CuO / Cu(OH)2 surface. Experimental results show that the film condensation started on the superhydrophilic region while the dropwise condensation of tiny droplets with an average contact angle of 160° were formed on the superhydrophobic region. Because the film condensation was confined within the superhydrophilic region of 1 mm x 1 mm, the contact angle of this droplet became larger and larger. When a tiny droplet developed on the superhydrophobic area joins with the big droplet formed on the superhydrophilic surface (square region), the coalesced droplet obtains additional energy and jumps off from the condensing surface.

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Wang, Xiaohan, Junjie Xing i Xiuli Fu. "Cu-doped NiFe layered double hydroxide nanosheets on nickel foam as an effective and durable electrocatalyst for oxygen evolution reaction". International Journal of Modern Physics B, 15.02.2023. http://dx.doi.org/10.1142/s0217979223502600.

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Water splitting by electrolysis is an environmentally friendly and promising method to gain hydrogen energy. Since both oxygen evolution reaction (OER) process and hydrogen evolution reaction process of electrolysis are kinetically sluggish and need to overcome a large potential barrier, it is imperative, especially for the poor kinetic OER, to explore available electrocatalytic materials. Here, this paper proposed a preparation of copper-doped nickel–iron-layered double hydroxide (NiFeCu LDH) with sheet-like nanostructure arranged perpendicularly to nickel foam matrix (NiFeCu LDH/NF) through a facile hydrothermal process. Benefitting from the combination with nickel foam and doping with copper, the poor conductivity of pure NiFe LDH is remedied and the quantity of exposed catalytic active sites on the electrocatalyst is increased. Hence, the as-prepared NiFeCu LDH/NF possesses outstanding OER catalytic capacity in 1.0[Formula: see text]M KOH, and when applying a mere overpotential of 183[Formula: see text]mV, it can convey a current density of 10[Formula: see text]mA cm[Formula: see text]. Furthermore, both at 10 and 80[Formula: see text]mA cm[Formula: see text], this electrocatalyst could maintain long-term durability at least for 24[Formula: see text]h. In our preparation, a simple approach was applied to bolster the OER catalytic performance of electrocatalysts based on NiFe LDH.

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