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Journal articles on the topic 'CuO-Cu₂O/ZnO'

Author: Grafiati

Published: 19 October 2024

Last updated: 31 July 2025

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1

Fatoni, Ahmad, Mauizatul Hasanah, Lasmaryna Sirumapea, et al. "Synthesis, Characterization of Polyvinyl Alcohol-Chitosan-ZnO/CuO Nanoparticles Film and Its Biological Evaluation as An Antibacterial Agent of Staphylococcus aureus." al-Kimiya 10, no. 1 (2023): 1–12. http://dx.doi.org/10.15575/ak.v10i1.24725.

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The polyvinyl alcohol-chitosan-ZnO/CuO nanoparticles film was researched. Synthesis, characterization, and its biological evaluation as an antibacterial of Staphylococcus aureus were the aims of this research. The biosynthesis of ZnO, CuO, and ZnO/CuO nanoparticles was done using the biological method. The polyvinyl alcohol-chitosan-ZnO/CuO nanoparticles film was synthesized using the casting method. All the products were characterized by FTIR spectroscopy, X-ray diffraction, and Scanning Electron Microscope (SEM). Polyvinyl alcohol-chitosan-ZnO/CuO nanoparticles film as a paper disk for the e

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Fatoni, Ahmad, Agnes Rendowati, Lasmaryna Sirumapea, Lidya Miranti, Siti Masitoh, and Nurlisa Hidayati. "Synthesis, Characterization of Chitosan-ZnO/CuO Nanoparticles Film, and its Effect as an Antibacterial Agent of Escherichia coli." Science and Technology Indonesia 8, no. 3 (2023): 373–81. http://dx.doi.org/10.26554/sti.2023.8.3.373-381.

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The film of chitosan- ZnO/CuO nanoparticles was synthesized. This study were the synthesis and characterization of the chitosan-ZnO/CuO nanoparticles film and its effect as an antibacterial of Escherichia coli. The ZnO, CuO, and ZnO/CuO were biosynthesized by biological method and for the synthesis of the chitosan-ZnO/CuO nanoparticles film, the casting method was adopted. The product was analyzed by FTIR spectroscopy, X-ray diffraction (XRD), and Scanning Electron Microscope (SEM), respectively. The product of chitosan-ZnO/CuO nanoparticles film as paper disk and agar disk diffusion method wa

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Fatoni, Ahmad, Marcelina Putriani, Amar Mulya Lubis, Mauizatul Hasanah, Ensiwi Munarsih, and Nurlisa Hidayati. "Synthesis, Characterization, and Antibacterial Activity of ZnO-CuO Nanoparticles Embedded in Chitosan and Polyvinyl Alcohol as Supporting Materials." JKPK (Jurnal Kimia dan Pendidikan Kimia) 10, no. 1 (2025): 110. https://doi.org/10.20961/jkpk.v10i1.92433.

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<p>The biosynthesis of bimetallic metal nanoparticles (ZnO–CuO) and their interaction with chitosan and polyvinyl alcohol (PVA) have garnered significant attention in recent years, primarily due to their promising antibacterial applications. This work proposes the bio-fabrication of ZnO–CuO nanoparticles, chitosan–PVA–ZnO–CuO nanoparticle films, and reports their physicochemical and antibacterial potential. Green betel leaves (<em>Piper betle</em> L.) ethanol extract was used to synthesize ZnO–CuO nanoparticles. For as-prepared bimetallic NPs, chitosan (CS), PVA, and bimetall

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Fadlly, Teuku Andi, and Rachmad Almi Putra. "CURRENT-VOLTAGE CHARACTERISTICS OF SOLAR CELLS p-n JUNCTION ZnO AND TiO2 PARAREL ON Cu2O LAYER." Jurnal Neutrino 12, no. 1 (2020): 1. http://dx.doi.org/10.18860/neu.v12i1.7578.

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Current-Voltage Characteristics of solar cells p-n junction ZnO and TiO<sub>2</sub> parallel in the Cu<sub>2</sub>O layer has been determined using solar irradiation. Metal oxide has been used as a semiconductor material, such as ZnO and TiO<sub>2</sub> is an n-type semiconductor. The material has a gap energy of 3.37 eV and 3.2 eV. Thermal oxidation is applied to commercial Cu plates for 60 minutes to produce Cu<sub>2</sub>O layers as p-type semiconductors. The process varies in temperature, namely 300, 400, and 500 °C. The process of thermal ox

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Zou, Xinwei, Huiqing Fan, Yuming Tian, Mingang Zhang, and Xiaoyan Yan. "Chemical bath deposition of Cu2O quantum dots onto ZnO nanorod arrays for application in photovoltaic devices." RSC Advances 5, no. 30 (2015): 23401–9. http://dx.doi.org/10.1039/c4ra13776k.

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A protective CuO layer on the Cu<sub>2</sub>O quantum dots was prepared by simply heat-treating the Cu<sub>2</sub>O/ZnO hetero-nanorod arrays in ambient air, which enhances the photovoltaic stability.

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6

Chan, Yu Bin, Mohammod Aminuzzaman, Lai-Hock Tey, et al. "Impact of Diverse Parameters on the Physicochemical Characteristics of Green-Synthesized Zinc Oxide–Copper Oxide Nanocomposites Derived from an Aqueous Extract of Garcinia mangostana L. Leaf." Materials 16, no. 15 (2023): 5421. http://dx.doi.org/10.3390/ma16155421.

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Compared to conventional metal oxide nanoparticles, metal oxide nanocomposites have demonstrated significantly enhanced efficiency in various applications. In this study, we aimed to synthesize zinc oxide–copper oxide nanocomposites (ZnO-CuO NCs) using a green synthesis approach. The synthesis involved mixing 4 g of Zn(NO3)2·6H2O with different concentrations of mangosteen (G. mangostana) leaf extract (0.02, 0.03, 0.04 and 0.05 g/mL) and 2 or 4 g of Cu(NO3)2·3H2O, followed by calcination at temperatures of 300, 400 and 500 °C. The synthesized ZnO-CuO NCs were characterized using various techni

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Zhu, Hua, Li Li, Wei Zhou, Zongping Shao, and Xianjian Chen. "Advances in non-enzymatic glucose sensors based on metal oxides." Journal of Materials Chemistry B 4, no. 46 (2016): 7333–49. http://dx.doi.org/10.1039/c6tb02037b.

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Sakib, Abdullah Al Mamun, Shah Md Masum, Jan Hoinkis, Rafiqul Islam, and Md Ashraful Islam Molla. "Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye." Journal of Composites Science 3, no. 3 (2019): 91. http://dx.doi.org/10.3390/jcs3030091.

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CuO/ZnO composites are synthesized using a simple mechanochemical combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared (FTIR) are used to characterize the prepared oxides. X-ray diffraction reveals that the prepared CuO/ZnO exhibit a wurtzite ZnO crystal structure and the composites are composed of CuO and ZnO. The strong peaks of the Cu, Zn, and O elements are exhibited in the EDX spectrum. The FTIR spectra appear at around 3385 cm−1 and 1637 cm−1, caused by O–H stretching, and 400 cm−1 to 59

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Wang, Haiguang, Yongfeng Liu, and Jun Zhang. "Hydrogen Production via Methanol Steam Reforming over CuO/ZnO/Al2O3 Catalysts Prepared via Oxalate-Precursor Synthesis." Catalysts 13, no. 10 (2023): 1335. http://dx.doi.org/10.3390/catal13101335.

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CuO/ZnO/Al2O3 catalysts are commonly used for the methanol steam reforming reaction. The oxalate precursor of CuO/ZnO/Al2O3 catalysts were prepared via the co-precipitation method using oxalic acid as the precipitator, deionized water and ethanol as the solvent, and microwave radiation and water baths as aging heating methods, respectively. This suggests that ethanol selects the crystalline phase composition of oxalate precursors and limits their growth. Microwave irradiation prompted the isomorphous substitution between Cu2+ of CuC2O4 and Zn2+ of ZnC2O4 in the mother liquid; Zn2+ in ZnC2O4·xH

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Gupta, Vishakha, Riti Thapar Kapoor, and Selvaraju Sivamani. "Chemical synthesis of metal and metal oxide nanoparticles and their antibacterial activity against pathogenic bacteria." BOHR Journal of Material Sciences and Engineering (BIJMSE) 1, no. 2 (2023): 36–42. https://doi.org/10.54646/bjmse.2023.07.

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The increasing emergence of bacterial resistance against antibiotics or antibacterial drugs has challenged the development of antibacterial agents like nanoparticles which have received increased attention due to their antibacterial activity against pathogenic bacteria. In this investigation, zinc oxide, copper oxide, and silver (ZnO, CuO, and Ag) nanoparticles were chemically synthesized by sol-gel, wet chemical precipitation, and chemical reduction procedures, respectively. Characterization of nanoparticles was performed using UV-Visible and Fourier-Transform Infrared (FTIR) spectroscopy. An

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OSTROVSKII, VICTORE E. "METAL-OXYGEN-HYDROGEN SOLID SYSTEM OF CONTROLLED COMPOSITION: DIFFERENTIAL HEAT EFFECTS, KINETICS, AND MECHANISMS OF THE CuO → Cu4·OH2 GRADING." International Journal of Modern Physics B 16, no. 01n02 (2002): 42–49. http://dx.doi.org/10.1142/s0217979202009433.

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The process of fine-crystal CuO reduction by successive small portions of H 2 was studied through isothermal calorimetric, kinetic, adsorption-desorption, and stoichiometric measurements at 293-520 K and H 2 pressures up to 100 Pa under conditions when equilibrium within the solid was achieved at any instant. The CuO studied was in the form of the component of the CuO-ZnO-Al 2 O 3 system. The stoichiometry of the copper component reduced corresponded to Cu 4· OH 2.

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Andreasen, Jens Wenzel, Frank Berg Rasmussen, Stig Helveg, et al. "Activation of a Cu/ZnO catalyst for methanol synthesis." Journal of Applied Crystallography 39, no. 2 (2006): 209–21. http://dx.doi.org/10.1107/s0021889806003098.

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The structural changes during activation by temperature-programmed reduction of a Cu/ZnO catalyst for methanol synthesis have been studied by severalin situtechniques. The catalyst is prepared by coprecipitation and contains 4.76 wt% Cu, which forms a substitutional solid solution with ZnO as determined by resonant X-ray diffraction.In situresonant X-ray diffraction reveals that the Cu atoms are extracted from the solid solution by the reduction procedure, forming metallic Cu crystallites. Cu is redispersed in bulk or surface Zn lattice sites upon oxidation by heating in air. The results are c

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Vengatesh, Priya P., J. Jeyasundari, Athithan A. S. Sakthi, and A. Naveena. "Investigation of Antibacterial Activity of Ag-CuO and Ag-ZnO Nanocomposites synthesized by Chemical Precipitation Method." Research Journal of Chemistry and Environment 27`, no. 9 (2023): 60–68. http://dx.doi.org/10.25303/2709rjce06068.

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In this present study, the synthesis of Ag-CuO and Ag-ZnO nanocomposites has been conducted. The individual Ag-CuO and Ag-ZnO nanocomposites were synthesized by using chemical precipitation method. The resulting particles were characterized by using UV-Visible, FTIR, XRD and SEM. The optical properties and band gap measurements were explored by UV-Visible spectroscopy. FTIR spectrum of the prepared nanocomposite revealed the presence of vibrational modes which were related to the Cu-O, Zn-O. The XRD analysis confirmed the structural purity of synthesized nanocomposites and the estimated crysta

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14

Liu, Jing, Yan Chen, and Hongyan Zhang. "Study of Highly Sensitive Formaldehyde Sensors Based on ZnO/CuO Heterostructure via the Sol-Gel Method." Sensors 21, no. 14 (2021): 4685. http://dx.doi.org/10.3390/s21144685.

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Formaldehyde (HCHO) gas sensors with high performance based on the ZnO/CuO heterostructure (ZC) were designed, and the sensing mechanism was explored. FTIR results show that more OH− and N–H groups appeared on the surface of ZC with an increase in Cu content. XPS results show that ZC has more free oxygen radicals (O*) on its surface compared with ZnO, which will react with more absorbed HCHO molecules to form CO2, H2O and, electrons, accelerating the oxidation-reduction reaction to enhance the sensitivity of the ZC sensor. Furthermore, electrons move from ZnO to CuO in the ZC heterostructure d

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15

Giraldo-Daza, Helver Augusto, José Darío Agudelo-Giraldo, César Leandro Londoño-Calderón, and Henry Reyes-Pineda. "Structural Disorder of CuO, ZnO, and CuO/ZnO Nanowires and Their Effect on Thermal Conductivity." Crystals 13, no. 6 (2023): 953. http://dx.doi.org/10.3390/cryst13060953.

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In this work, the structural defects and the thermal conductivity of CuO, ZnO, and CuO/ZnO nanowires have been studied, using molecular dynamics simulation with COMB3 potential. The initial parameters and atoms positions were taken from reports of bulk materials with tenorite and wurtzite structures, respectively. Nanowires were grown along the c-axis, as observed experimentally. The results confirm the defects apparition in the systems after simulation with a formation of grains to reduce the energy of the nanowires. In the CuO nanowires case, the lack of periodicity in the basal plane causes

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16

Wang, Feng, Jing Zhou, Zi Long An, and Xin Jing Zhou. "Characteristic of Cu-Based Catalytic Coating for Methanol Steam Reforming Prepared by Cold Spray." Advanced Materials Research 156-157 (October 2010): 68–73. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.68.

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Cu-based catalyst is active for methanol steam reforming (MSR) at low temperature. The Cu、Cu+Al2O3 composite and CuO/ZnO/Al2O3 catalytic powers are used as feedstock for coating fabrication by cold spray. MSR experiment and SEM、EDX 、XRD analysis before and after the MSR on the coating has been carried out to study the micostructure and catalytic characteristic of the deposits. Results show that, after reaction the morphology of the Cu coating changes from piled sheets structure to mciro-ramify structure, its porosity obviously increase, the net weight of O、Al in the coating increases, H2 conte

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Shrestha, Buddha Kumar, Hira Mani Trital, and Armila Rajbhandari. "Synthesis and Characterization of CuO-ZnO Nano Additive for Lubricant." Scientific World 13, no. 13 (2020): 33–36. http://dx.doi.org/10.3126/sw.v13i13.30504.

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A mixed metal oxide (CuO-ZnO) additives has been successfully synthesized in laboratory by co-precipitation technique. The optimum ratio of CuO and ZnO in mixed metal oxide was found to be 1:1. The sodium lauryl sulfate (SLS) has been used as surfactant. The obtained material was found to be crystalline having crystalline size of 18 nm. The stretching band in FTIR spectra at around 1072 cm-1 to 750 cm-1 and around 600 cm-1 indicates the presence of Zn-O and Cu-O bonds. As prepared nano-particles have been used as nano additive in base oil to improve physio-chemical parameters of lubricants. Th

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Mokhtari, S., and A. W. Wren. "Investigating the effect of Copper Addition on SiO2-ZnO-CaO-SrO-P2O5 Glass Polyalkenoate Cements: Physical, Mechanical and Biological Behavior." Biomedical Glasses 5, no. 1 (2019): 13–33. http://dx.doi.org/10.1515/bglass-2019-0002.

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Abstract The physical, mechanical, and biological behaviour of copper containing glass polyalkenotare cements were investigated, where copper (Cu2+) was incorporated into a SiO2-ZnO-CaO-SrO-P2O5 based glass system. Three GPCs were formulated for this study, a Control and two Cu-GPCs with 6 (Cu-1) and 12 (Cu-2) Mol.% of CuO substituted for the SiO2 in the glass. Rheological evaluation of GPCs determined that the addition of the Cu decreases the working and setting times in the cements. The mechanical properties of the cements were evaluated after 1 - 21 days incubation in DI water. The compress

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Ginting, Simparmin Boru, Sona Erlangga, Heri Rustamaji, Darmansyah, Muhammad Niki Wijaya та Herry Wardono. "Effect of Heating Time Variation on The Activation of Modified Palm Oil Fly Ash as β-Carotene Adsorbent on Crude Palm Oil". Jurnal Bahan Alam Terbarukan 13, № 2 (2025): 117–29. https://doi.org/10.15294/jbat.v13i2.9742.

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Crude Palm Oil (CPO) contains β-carotene as source of pro-vitamin A. Alternative adsorbent that can be used to adsorb β-carotene is Palm Oil Fly Ash (POFA). This study aims to determine the ability of POFA activated with H3PO4 and Cu/Zn impregnation to adsorb β-carotene from CPO to obtain characteristics data of modified POFA and its ability to adsorb β-carotene. The main materials used were CPO and POFA. The parameters observed were the characterization and performance test of 9% H3PO4-activated POFA produced at various heating times for 90, 150, and 210 minutes with Cu/Zn impregnation. BET a

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Izaki, Masanobu, Pei Loon Khoo, and Tsutomu Shinagawa. "Review—Solution Electrochemical Process for Fabricating Metal Oxides and the Thermodynamic Design." Journal of The Electrochemical Society 168, no. 11 (2021): 112510. http://dx.doi.org/10.1149/1945-7111/ac371a.

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Electrochemical processes in aqueous solutions are widely used for preparation of metals, alloys, composites, metal oxides and compounds. For understanding and designing an electrochemical process, it is crucial to study its soluble chemical species, potential-pH diagram, and solubility curves drawn based on thermodynamics. In this review, equilibrium electrode potentials, critical pH values, and dissolved chemical species related to the oxidation-reduction, acid-base, and ligand-exchanging reactions, in addition to the calculation based on standard Gibbs free energy are first briefly mentione

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Deore, M. K., V. B. Gaikwad, D. D. Kajale, and J. H. Jain. "Effect of Surface Modification by CuO on Surface Morphology, Electrical Properties and Gas Response of ZnO Thick Films." Sensor Letters 17, no. 12 (2019): 968–76. http://dx.doi.org/10.1166/sl.2019.4182.

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The screen printing technique was used for the preparation of ZnO thick films. The films were dipped into 0.01 M aq. solution of (CulCl2 · 2H2O) for 10, 15, 20 and 30 min time interval for the surface modification. The dispersed CuCl2 on the film surface oxidized during heating at 500 °C and converted into CuO. SEM coupled with EDAX analysis showed the morphology of surface and elemental composition of the films. The micrographs of the films dipped at different time interval show the very interesting changes. The EDAX result shows variation in Zn/O and Cu/Zn ratio with different concentration

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王, 鑫. "Preparation of CuO/Cu₂O/ZnO Composite and Study on the Catalytic Performance of Fenton under Visible Light." Hans Journal of Nanotechnology 11, no. 03 (2021): 43–53. http://dx.doi.org/10.12677/nat.2021.113006.

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Roberts, Andrew C., Lee A. Groat, Joel D. Grice, et al. "Leisingite, Cu(Mg,Cu,Fe,Zn)2Te6+O6·6H2O, a new mineral species from the Centennial Eureka mine, Juab County, Utah." Mineralogical Magazine 60, no. 401 (1996): 653–57. http://dx.doi.org/10.1180/minmag.1996.060.401.11.

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AbstractLeisingite, ideally Cu(Mg,Cu,Fe,Zn)2Te6+O6·6H2O, is hexagonal, P3 (143), with unit-cell parameters refined from powder data: a = 5.305(1), c = 9.693(6) Å, V = 236.2(2) Å3, c/a = 1.8271, Z = 1. The strongest six reflections of the X-ray powder-diffraction pattern [d in Å (I) (hkl)] are: 9.70 (100) (001), 4.834 (80) (002), 4.604 (60) (100), 2.655 (60) (110), 2.556 (70) (111) and 2.326 (70) (112). The mineral is found on the dumps of the Centennial Eureka mine, Juab County, Utah U.S.A. where it occurs as isolated, or rarely as clusters of, hexagonal-shaped very thin plates or foliated mas

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Kuklin, Mikhail S., and Antti J. Karttunen. "Evolutionary Algorithm-Based Crystal Structure Prediction of CuxZnyOz Ternary Oxides." Molecules 28, no. 16 (2023): 5986. http://dx.doi.org/10.3390/molecules28165986.

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Binary zinc(II) oxide (ZnO) and copper(II) oxide (CuO) are used in a number of applications, including optoelectronic and semiconductor applications. However, no crystal structures have been reported for ternary Cu-Zn-O oxides. In that context, we investigated the structural characteristics and thermodynamics of CuxZnyOz ternary oxides to map their experimental feasibility. We combined evolutionary crystal structure prediction and quantum chemical methods to investigate potential CuxZnyOz ternary oxides. The USPEX algorithm and density functional theory were used to screen over 4000 crystal st

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Kampf, A. R., S. J. Mills, and B. P. Nash. "Pauladamsite, Cu4(SeO3)(SO4)(OH)4·2H2O, a new mineral from the Santa Rosa mine, Darwin district, California, USA." Mineralogical Magazine 80, no. 6 (2016): 949–58. http://dx.doi.org/10.1180/minmag.2016.080.032.

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AbstractPauladamsite (IMA2015-005), Cu4(SeO3)(SO4)(OH)4·2H2O, is a new mineral from the Santa Rosa mine, Darwin district, Inyo County, California, USA, where it occurs as a secondary oxidation-zone mineral in association with brochantite, chalcanthite, gypsum, ktenasite, mimetite, schulenbergite and smithsonite on limonitic gossan. Pauladamsite forms green, multiply twinned blades up to 0.5 mm long grouped in radial sprays. The streak is pale green. Crystals are transparent and have vitreous to silky lustre. The Mohs hardness is ∼2, the tenacity is brittle, the fracture is irregular and crysta

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Pekov, I. V., N. V. Zubkova, M. E. Zelenski, et al. "Yaroshevskite, Cu9O2(VO4)4Cl2, a new mineral from the Tolbachik volcano, Kamchatka, Russia." Mineralogical Magazine 77, no. 1 (2013): 107–16. http://dx.doi.org/10.1180/minmag.2013.077.1.10.

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AbstractA new mineral, yaroshevskite, ideally Cu9O2(VO4)4Cl2, occurs in sublimates collected from the Yadovitaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with euchlorine, fedotovite, hematite, tenorite, lyonsite, melanothallite, atlasovite, kamchatkite and secondary avdoninite, belloite and chalcanthite. Yaroshevskite forms isolated prismatic crystals, up to 0.1 × 0.15 × 0.3 mm in size, on the surface of euchlorine crusts. The mineral is opaque and black, with a reddish black

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Pekov, Igor, Fedor Sandalov, Natalia Koshlyakova, et al. "Copper in Natural Oxide Spinels: The New Mineral Thermaerogenite CuAl2O4, Cuprospinel and Cu-Enriched Varieties of Other Spinel-Group Members from Fumaroles of the Tolbachik Volcano, Kamchatka, Russia." Minerals 8, no. 11 (2018): 498. http://dx.doi.org/10.3390/min8110498.

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This paper is the first description of natural copper-rich oxide spinels. They were found in deposits of oxidizing-type fumaroles related to the Tolbachik volcano, Kamchatka, Russia. This mineralization is represented by nine species with the following maximum contents of CuO (wt.%, given in parentheses): a new mineral thermaerogenite, ideally CuAl2O4 (26.9), cuprospinel, ideally CuFe3+2O4 (28.6), gahnite (21.4), magnesioferrite (14.7), spinel (10.9), magnesiochromite (9.0), franklinite (7.9), chromite (5.9), and zincochromite (4.8). Cuprospinel, formerly known only as a phase of anthropogenic

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Nazarchuk, Evgeny V., Oleg I. Siidra, Diana O. Nekrasova, Vladimir V. Shilovskikh, Artem S. Borisov, and Evgeniya Y. Avdontseva. "Glikinite, Zn3O(SO4)2, a new anhydrous zinc oxysulfate mineral structurally based on OZn4 tetrahedra." Mineralogical Magazine 84, no. 4 (2020): 563–67. http://dx.doi.org/10.1180/mgm.2020.33.

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AbstractA new mineral glikinite, ideally Zn3O(SO4)2, was found in high-temperature exhalative mineral assemblages in the Arsenatnaya fumarole, Second scoria cone of the Great Tolbachik Fissure Eruption (1975–1976), Tolbachik volcano, Kamchatka Peninsula, Russia. Glikinite is associated closely with langbeinite, lammerite-β, bradaczekite, euchlorine, anhydrite, chalcocyanite and tenorite. It is monoclinic, P21/m, a = 7.298(18), b = 6.588(11), c = 7.840(12) Å, β = 117.15(3)°, V = 335.4(11) Å3 and R1 = 0.046. The eight strongest lines of the powder X-ray diffraction pattern [d in Å (I) (hkl)] are

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Siidra, Oleg I., Evgeny V. Nazarchuk, Anatoly N. Zaitsev, Yury S. Polekhovsky, Thomas Wenzel, and John Spratt. "Dokuchaevite, Cu8O2(VO4)3Cl3, a new mineral with remarkably diverse Cu2+ mixed-ligand coordination environments." Mineralogical Magazine 83, no. 5 (2019): 749–55. http://dx.doi.org/10.1180/mgm.2019.41.

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AbstractDokuchaevite, ideally Cu8O2(VO4)3Cl3, was found in the Yadovitaya fumarole of the Second scoria cone of the North Breach of the Great Tolbachik Fissure Eruption (1975–1976), Tolbachik volcano, Kamchatka Peninsula, Russia. Dokuchaevite occurs on the crusts of various copper sulfate exhalative minerals (such as kamchatkite and euchlorine) as individual prismatic crystals. Dokuchaevite is triclinic, P$\bar{1}$, a = 6.332(3), b = 8.204(4), c = 15.562(8) Å, α = 90.498(8), β = 97.173(7), γ = 90.896(13)°, V = 801.9(7) Å3 and R1 = 0.057. The eight strongest lines of the X-ray powder diffractio

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Krause, W., H. J. Bernhardt, R. S. W. Braithwaite, U. Kolitsch, and R. Pritchard. "Kapellasite, Cu3Zn(OH)6CI2, a new mineral from Lavrion, Greece, and its crystal structure." Mineralogical Magazine 70, no. 3 (2006): 329–40. http://dx.doi.org/10.1180/0026461067030336.

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AbstractKapellasite, Cu3Zn(OH)6Cl2, is a new secondary mineral from the Sounion No. 19 mine, Kamariza, Lavrion, Greece. It is a polymorph of herbertsmithite. Kapellasite forms crusts and small aggregates up to 0.5 mm, composed of bladed or needle-like indistinct crystals up to 0.2 mm long. The colour is green-blue, the streak is light green-blue. There is a good cleavage parallel to ﹛0001﹜. Kapellasite is uniaxial negative, ω = 1.80(1), ε = 1.76(1); pleochroism is distinct, with E = pale green, O = green-blue. Dmeas = 3.55(10) g/cm3; Dcalc. = 3.62 g/cm3. Electron microprobe analyses of the typ

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Nazarchuk, Evgeny V., Oleg I. Siidra, Atali A. Agakhanov, Evgeniya A. Lukina, Evgeniya Y. Avdontseva, and Gennady A. Karpov. "Itelmenite, Na2CuMg2(SO4)4, a new anhydrous sulfate mineral from the Tolbachik volcano." Mineralogical Magazine 82, no. 6 (2018): 1233–41. http://dx.doi.org/10.1180/minmag.2017.081.089.

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ABSTRACTItelmenite, ideally Na2CuMg2(SO4)4, was found in a fumarole of the Naboko scoria cone of the Tolbachik volcano Fissure Eruption (2012–2013), Kamchatka Peninsula, Russia. Itelmenite occurs as irregularly shaped grains as well as microcrystalline masses associated with anhydrite, saranchinaite, hermannjahnite, euchlorine, thénardite, aphthitalite and hematite. Itelmenite is orthorhombic, Pbca, a = 9.568(2) Å, b = 8.790(2) Å, c = 28.715(8) Å, V = 2415.0(11) Å3 and Z = 4 (from single-crystal diffraction data). The nine strongest lines of the powder X-ray diffraction pattern are [d(I)(hkl)]

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Pekov, Igor V., Natalia V. Zubkova, Vasiliy O. Yapaskurt, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. III. Popovite, Cu5O2(AsO4)2." Mineralogical Magazine 79, no. 1 (2015): 133–43. http://dx.doi.org/10.1180/minmag.2015.079.1.11.

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AbstractThe new mineral popovite, Cu5O2(AsO4)2, was found in the sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with ericlaxmanite, kozyrevskite, urusovite, lammerite, lammerite-β, johillerite, bradaczekite, tenorite, hematite, aphthitalite, anhydrite, langbeinite, calciolangbeinite, As-bearing orthoclase, etc. Popovite occurs as prismatic or tabular crystals and as grains up to 0.2 mm in size forming clusters up to 1.5 mm in size and as crusts on basal

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Siidra, Oleg I., Evgeny V. Nazarchuk, Anatoly N. Zaitsev, and Vladimir V. Shilovskikh. "Majzlanite, K2Na(ZnNa)Ca(SO4)4, a new anhydrous sulfate mineral with complex cation substitutions from Tolbachik volcano." Mineralogical Magazine 84, no. 1 (2019): 153–58. http://dx.doi.org/10.1180/mgm.2019.68.

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AbstractA new mineral majzlanite, ideally K2Na(ZnNa)Ca(SO4)4, was found in high-temperature exhalative mineral assemblages in the Yadovitaya fumarole, Second scoria cone of the Great Tolbachik Fissure Eruption (1975–1976), Tolbachik volcano, Kamchatka Peninsula, Russia. Majzlanite is associated closely with langbeinite and K-bearing thénardite. Majzlanite is grey with a bluish tint, has a white streak and vitreous lustre. The mineral is soluble in warm water. Majzlanite is monoclinic, C2/c, a = 16.007(2), b = 9.5239(11), c = 9.1182(10) Å, β = 94.828(7)°, V = 1385.2(3) Å3 and Z = 16. The eight

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Pekov, Igor V., Natalia V. Zubkova, Vasiliy O. Yapaskurt, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. VI. Melanarsite, K3Cu7Fe3+O4(AsO4)4." Mineralogical Magazine 80, no. 5 (2016): 855–67. http://dx.doi.org/10.1180/minmag.2016.080.027.

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AbstractThe new mineral melanarsite, K3Cu7Fe3+O4(AsO4)4, was found in the sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Russia. It is associated with dmisokolovite, shchurovskyite, bradaczekite, hematite, tenorite, aphthitalite, johillerite, arsmirandite, As-bearing orthoclase, hatertite, pharmazincite, etc. Melanarsite occurs as tabular to prismatic crystals up to 0.4 mm, separate or combined in clusters up to 1 mm across or in interrupted crusts up to 0.02 cm × 1 c

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Pekov, I. V., N. V. Zubkova, V. O. Yapaskurt, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. I. Yurmarinite, Na7(Fe3+,Mg,Cu)4(AsO4)6." Mineralogical Magazine 78, no. 4 (2014): 905–17. http://dx.doi.org/10.1180/minmag.2014.078.4.10.

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AbstractA new mineral, yurmarinite, Na7(Fe3+,Mg,Cu)4(AsO4)6, occurs in sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with hatertite, bradaczekite, johillerite, hematite, tenorite, tilasite and aphthitalite. Yurmarinite occurs as well-shaped, equant crystals up to 0.3 mm in size, their clusters up to 0.5 mm and thin, interrupted crystal crusts up to 3 mm × 3 mm on volcanic scoria. Crystal forms are {101}, {011}, {100}, {110} and {001}. Yurmarinite is tr

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Pekov, Igor V., Natalia N. Koshlyakova, Atali A. Agakhanov, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XV. Calciojohillerite, NaCaMgMg2(AsO4)3, a member of the alluaudite group." Mineralogical Magazine 85, no. 2 (2021): 215–23. http://dx.doi.org/10.1180/mgm.2021.2.

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AbstractThe new alluaudite-group mineral calciojohillerite is one of the major arsenates in sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. In middle zones of the fumarole, calciojohillerite is associated with hematite, tenorite, johillerite, nickenichite, bradaczekite, badalovite, tilasite, lammerite, ericlaxmanite, aphthitalite-group sulfates, langbeinite, calciolangbeinite, anhydrite, sanidine, fluorophlogopite, fluoborite, cassiterite, pseudobrookite, rutile, sylvite

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Magaji, M. B., C. M. Elinge, A. U. Birnin-Yauri, and S. Umar. "Production and Characterization of Acid-Base Biofunctional Catalyst from Desert Date (Balanite aegyptiaca) Seed Shells (DDSS) for Biodiesel Production." Bulletins of Natural and Applied Sciences 2, no. 1 (2025): 11–20. https://doi.org/10.5281/zenodo.14942908.

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Pekov, I. V., N. V. Zubkova, V. O. Yapaskurt, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. II. Ericlaxmanite and kozyrevskite, two natural modifications of Cu4O(AsO4)2." Mineralogical Magazine 78, no. 7 (2014): 1553–69. http://dx.doi.org/10.1180/minmag.2014.078.7.03.

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AbstractTwo new minerals, ericlaxmanite and kozyrevskite, dimorphs of Cu4O(AsO4)2, were found in sublimates of the Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. They are associated with each other and with urusovite, lammerite, lammerite-b, popovite, alarsite, tenorite, hematite, aphthitalite, langbeinite, As-bearing orthoclase, etc. Ericlaxmanite occurs as tabular, lamellar, equant or short prismatic crystals up to 0.1 mm in size, their clusters and pseudomorphs after urusovite crystal

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Pekov, Igor V., Natalia V. Zubkova, Dmitry I. Belakovskiy, et al. "New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. IV. Shchurovskyite, K2CaCu6O2(AsO4)4 and dmisokolovite, K3Cu5AlO2(AsO4)4." Mineralogical Magazine 79, no. 7 (2015): 1737–53. http://dx.doi.org/10.1180/minmag.2015.079.7.02.

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AbstractTwo new minerals shchurovskyite, ideally K2CaCu6O2(AsO4)4, and dmisokolovite, ideally K3Cu5AlO2(AsO4)4, are found in sublimates of the Arsenatnaya fumarole at the Second scoriacone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Russia. They are associated with one another and with johillerite, bradaczekite, tilasite, melanarsite, tenorite, hematite, aphthitalite, langbeinite, orthoclase, etc. Shchurovskyiteoccurs as coarse tabular or prismatic crystals up to 0.15 mm in size or anhedral grains forming parallel aggregates and

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40

Saenko, A. V., G. E. Bilyk, and V. A. Smirnov. "Study of the Photovoltaic Parameters of Inorganic Solar Cells Based on Cu<i>2</i>O and CuO." Mikroèlektronika 53, no. 4 (2024): 285–96. http://dx.doi.org/10.31857/s0544126924040011.

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A theoretical study of the photovoltaic parameters of inorganic solar cells based on ZnO/Cu2O and ZnO/CuO heterojunctions was carried out to improve the energy conversion efficiency. The influence of the thickness, charge carrier concentration and band gap of Cu2O and CuO films, as well as ZnO, on the photovoltaic parameters of solar cells has been studied. The simulation results showed that the efficiency of solar cells is significantly affected by the contact potential difference, the diffusion length of minority charge carriers, the amount of generated photocurrent and the recombination rat

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González-Moreno, F. I., R. V. Tolentino-Hernández, and F. J. Espinosa-Faller. "Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis." Journal of Physics: Conference Series 2699, no. 1 (2024): 012017. http://dx.doi.org/10.1088/1742-6596/2699/1/012017.

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Abstract In this work, copper (I) oxide films were prepared by pulsed electrodeposition onto copper substrates. Graphene oxide was deposited on the Cu2O/Cu films by cathodic electrophoresis. The films were studied by X-ray diffraction, Raman spectroscopy, optical reflectance and atomic force microscopy. The bandgap of the Cu2O/Cu films is close to 1.8 eV due to the presence of defects and decreases to close to 1.1 eV with GO deposition due to the oxidation of Cu2O to CuO on the surface. When GO was deposited, a reduction in the mean height was observed, indicating coverage of the entire surfac

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Tofighi, Ghazal, Henning Lichtenberg, Abhijeet Gaur, et al. "Continuous synthesis of Cu/ZnO/Al₂O₃ nanoparticles in a co-precipitation reaction using a silicon based microfluidic reactor." Reaction Chemistry & Engineering 7, no. 3 (2022): 730–40. http://dx.doi.org/10.1039/d1re00499a.

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43

Mills, Stuart J., Uwe Kolitsch, Georges Favreau, William D. Birch, Valérie Galea-Clolus, and Johannes Markus Henrich. "Gobelinite, the Co analogue of ktenasite from Cap Garonne, France, and Eisenzecher Zug, Germany." European Journal of Mineralogy 32, no. 6 (2020): 637–44. http://dx.doi.org/10.5194/ejm-32-637-2020.

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Abstract. The new mineral gobelinite, ideally CoCu4(SO4)2(OH)6⚫6H2O, is a new member of the ktenasite group and the Co analogue of ktenasite, ZnCu4(SO4)2(OH)6⚫6H2O. It occurs at Cap Garonne (CG), Var, France (type locality), and Eisenzecher Zug (EZ), Siegerland, North Rhine-Westphalia, Germany (cotype locality). The mineral forms pale green, bluish green or greyish green, blocky to thin, lath-like crystals. They are transparent and non-fluorescent, with a vitreous, sometimes also pearly, lustre and a white streak having a pale-green cast. Mohs hardness is about 2.5. The crystals are brittle wi

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Mohd Zabidi, Noor Asmawati, Tuan Syahylah Tuan Sulong, and Sardar Ali. "Synthesis and Characterization of Cu/ZnO Catalyst on Carbon Nanotubes and Al₂O₃ Supports." Materials Science Forum 916 (March 2018): 139–43. http://dx.doi.org/10.4028/www.scientific.net/msf.916.139.

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CO2 conversion into valuable chemicals is an attractive option to deal with the increasing CO2 concentration in the atmosphere. In this study, Cu/ZnO catalyst was synthesized on multi-walled carbon nanotubes (MWCNTs) and Al2O3 supports via incipient wetness impregnation method. The physicochemical properties of the catalysts were investigated using TEM, XRD, N2 adsorption-desorption analysis, H2-TPR and XPS. The performance of the synthesized catalysts in a CO2 hydrogenation reaction was evaluated in a fixed-bed reactor at 503 K, 22.5 bar and H2:CO2 ratio of 3:1. TEM images showed that Cu/ZnO

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Li, Pen-Xin, Ai-Yun Yang, Lang Xin, Biao Xue, and Chun-Hao Yin. "Photocatalytic Activity and Mechanism of Cu²⁺ Doped ZnO Nanomaterials." Science of Advanced Materials 14, no. 10 (2022): 1599–604. http://dx.doi.org/10.1166/sam.2022.4363.

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The photocatalytic activity and mechanism of photocatalysts made of ZnO nanoparticles before and after doping with different Cu2+ concentrations were studied by electron paramagnetic resonance and X-ray diffraction. The nanoparticles were prepared using sol–gel method. UV-vis spectrometers characterized the photocatalytic degradation effect of the composite samples on methyl orange solution. The results of X-ray diffraction showed that the hexagonal wurtzite structure of ZnO changed little by Cu2+ doping. With the increase in doping concentration, the CuO and Cu2O diffraction peaks were detect

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Vusikhis, Alexander S., Evgeny N. Selivanov, Stanislav N. Tyushnyakov та Viktor P. Chentsov. "Metal reduction by hydrogen from the B2O3-СaO-Ni(Zn, Pb, Cu)O melts thermodynamic modeling". Butlerov Communications 61, № 2 (2020): 145–51. http://dx.doi.org/10.37952/roi-jbc-01/20-61-2-145.

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Thermodynamic modeling is used to describe the metal reduction processes by hydrogen from oxide melt in the B2O3-CaO- MeO (Me – Ni, Zn, Pb, Cu) system. Open systems approximation with periodic removal of metal particles and gases from the working melt composition is used in the method. By this work we present the thermodynamic modeling results of metal reduction processes (Ni, Cu, Pb, Zn) by Hydrogen. The reducible metals oxides content in the all melts was 3 mass %, and the mass ratio of B2O3/CaO was taken as 3 to be close to eutectic composition. The calculations made it possible to determin

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Vusikhis, Alexander S., Evgeny N. Selivanov, Stanislav N. Tyushnyakov, and Victor P. Chentsov. "Thermodynamic modeling of reduction of metals from B2O3-CaO-Ni(Zn,Pb,Cu)O melts carbon monoxide." Butlerov Communications 59, no. 9 (2019): 125–31. http://dx.doi.org/10.37952/roi-jbc-01/19-59-9-125.

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Thermodynamic modeling technique is used to describe the metal reduction from oxide melt by carbon monoxide. The B2O3-CaO-MeO (Me – Ni, Zn, Pb, Cu) system, was used with periodic output of the metal phase and gases from the working body. The approach originality is that the equilibrium is determined for each single portion of the gas injected into the working body, and the metal oxides content being reduced in each calculation cycle is taken from the previous data. This approach gives qualitative possibility to make simulated processes closer to real ones. The proposed method calculations allo

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Cem, Batuhan Cevlik, Can Ozarslan Ali, Karakuzu Ikizler Burcu, Basaran Elalmis Yeliz, and Yücel Sevil. "Investigation of Mg, K, Cu, Zn doped S53P4 bioactive glass in vitro studies; bioactivity and biodegradability features." Journal of Indian Chemical Society Vol. 96, Sep 2019 (2019): 1131–36. https://doi.org/10.5281/zenodo.5643222.

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Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, Esenler, Istanbul, Turkey <em>E-mail</em>: syucel@yildiz.edu.tr, yuce.sevil@gmail.com <em>Manuscript received online 26 April 2019, revised and accepted 20 July 2019</em> In this study, it was aimed to produce by melt-quenching method non-additive (SiO<sub>2</sub> -Na<sub>2</sub>O-P<sub>2</sub>O<sub>5</sub> -CaO) and ion additive (SiO<sub>2</sub> - Na<sub>2</sub>O-P<sub>2</sub>O<sub>5</sub> -CaO-MgO-ZnO-K<sub>2</sub>O-CuO) bioactive glasses (different forms; powder and granule). In vit

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Mikkelsen, J. C., J. B. Boyce, and F. Bridges. "XAFS Characterization of Cu-Doped ZnO Films." MRS Proceedings 307 (1993). http://dx.doi.org/10.1557/proc-307-173.

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ABSTRACTThis paper describes x-ray absorption measurements made on 10 to 16-μm-thick films of ZnO, which contained 5 mol% CuO, and were grown by reactive sputtering. We compare our experimental near-edge and XAFS results to models for Cu-O phases and Cu incorporation into the ZnO lattice, and we conclude that roughly half of the Cu atoms are substitutional for Zn on the wurtzite lattice and the other half is in a highly disordered phase, which has an XAFS signature which is similar to disordered CuO. Our results are compared to other structural studies of Cu-doped ZnO materials.

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Wong, Yee Jin, Hemaroopini Subramaniam, Ling Shing Wong, et al. "Green synthesis and characterization of CuO/ZnO nanocomposite using Musa acuminata leaf extract for cytotoxic studies on colorectal cancer cells (HCC2998)." Green Processing and Synthesis 13, no. 1 (2024). https://doi.org/10.1515/gps-2024-0164.

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Abstract Green synthesis has become an alternative to replace chemical synthesis in nanotechnology because of its low cost and toxicity. The synthesis of nanocomposite (NC) has attracted the attention of researchers, as its synergistic effect might enhance its effectiveness in anticancer to overcome multidrug resistance. In this study, copper oxide/zinc oxide (CuO/ZnO) NC was green synthesized from the crude extract of Musa acuminata leaves with Zn(NO3)2·6H2O and Cu(NO3)2·3H2O as precursors. CuO/ZnO NC was characterized via UV-Vis analysis with a peak detected at 365 nm with a bandgap energy o

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