Synthesis of copper oxides films via anodic oxidation of copper foil followed by thermal reduction

Zimbovskiy, D S; Gavrilov, A. I.; Чурагулов, Б. Р.

doi:10.1088/1757-899x/347/1/012010

Cited by 17 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure D shows a Raman spectrum of Cu 2 ONPs. Characteristic Raman bands of Cu 2 O are observed at 148 (T 1u symmetry), 182, 219 (strongest E u ), 420, 486, and 630 cm –1 (T 1u ) and are in agreement with data from literature. − The 148 and 219 cm –1 spectral features are due to rotations of the Cu tetrahedron around its center. The 630 cm –1 band is attributed to an out-of-plane vibration of the Cu and O sub-lattice and, like the 148 cm –1 band, is activated by defects.…”

Section: Resultssupporting

confidence: 86%

Determination of the Influence of Various Factors on the Character of Surface Functionalization of Copper(I) and Copper(II) Oxide Nanosensors with Phenylboronic Acid Derivatives

2021

View full text Add to dashboard Cite

In this work, we attempt to determine the influence of the oxidation state of copper [Cu(I) vs Cu(II)], the nature of the interface (solid/aqueous vs solid/air), the incubation time, and the structure of N-substituted phenylboronic acids (PBAs) functionalizing the surface of copper oxide nanostructures (NSs) on the mode of adsorption. For this purpose, 4-[(N-anilino)-(phosphono)-S-methyl]phenylboronic acid (1-PBA) and its two analogues (2-PBA and bis{1-PBA}) and the copper oxide NSs were synthesized in a surfactant-/ion-free solution via a synthetic route that allows controlling the size and morphology of NSs. The NSs were characterized by scanning electron microscopy, ultraviolet−visible spectroscopy, Raman spectroscopy, and X-ray diffraction, which confirmed the formation of spherical Cu 2 O nanoparticles (Cu 2 ONPs) with a size of 1.5 μm to 600 nm crystallized in a cubic cuprite structure and leaf-like CuO nanostructures (CuONSs) with dimensions of 80−180 nm in width and 400−700 nm in length and crystallized in a monoclinic structure. PBA analogues were deposited on the surface of the copper oxide NSs, and adsorption was investigated using surface-enhanced Raman spectroscopy (SERS). The changes in the orientation of the molecule relative to the substrate surface caused by the abovementioned factors were described, and the signal enhancement on the copper oxide NSs was determined. This is the first study using vibrational spectroscopy for these compounds.

show abstract

Section: Resultssupporting

confidence: 86%

Determination of the Influence of Various Factors on the Character of Surface Functionalization of Copper(I) and Copper(II) Oxide Nanosensors with Phenylboronic Acid Derivatives

2021

View full text Add to dashboard Cite

show abstract

“…Finally, Cu(OH) 2 exhibits a peak at approx. 300 cm −1 and a main peak at 490 cm −1 [79,[81][82][83][84]. These values were used to identify possible changes in the chemical composition of the surface due to transition between copper species.…”

Section: Evaluation Of Surface Propertiesmentioning

confidence: 99%

Hydrophilic and Hydrophobic Nanostructured Copper Surfaces for Efficient Pool Boiling Heat Transfer with Water, Water/Butanol Mixtures and Novec 649

et al. 2021

View full text Add to dashboard Cite

Increasing heat dissipation requirements of small and miniature devices demands advanced cooling methods, such as application of immersion cooling via boiling heat transfer. In this study, functionalized copper surfaces for enhanced heat transfer are developed and evaluated. Samples are functionalized using a chemical oxidation treatment with subsequent hydrophobization of selected surfaces with a fluorinated silane. Pool boiling tests with water, water/1-butanol mixture with self-rewetting properties and a novel dielectric fluid with low GWP (Novec™ 649) are conducted to evaluate the boiling performance of individual surfaces. The results show that hydrophobized functionalized surfaces covered by microcavities with diameters between 40 nm and 2 µm exhibit increased heat transfer coefficient (HTC; enhancements up to 120%) and critical heat flux (CHF; enhancements up to 64%) values in comparison with the untreated reference surface, complemented by favorable fabrication repeatability. Positive surface stability is observed in contact with water, while both the self-rewetting fluids and Novec™ 649 gradually degrade the boiling performance and in some cases also the surface itself. The use of water/1-butanol mixtures in particular results in surface chemistry and morphology changes, as observed using SEM imaging and Raman spectroscopy. This seems to be neglected in the available literature and should be focused on in further studies.

show abstract

“…[ 24 ] The higher charging voltage (exceeding 1.2 V) becomes further possible because of resistance arising from the formation of Cu 2 O (a p‐type semiconductor) by oxidation of Cu first in air and then as a consequence of anodic oxidation following its incorporation in the capacitor structure. [ 25–27 ] The anodic oxidation of copper and the increasing thickness of the oxide layer can also explain the diminishing capacitance as the number of charge–discharge cycles increase. Beguin and coworkers reported a charging voltage of 1.9 V using water electrolytes with Li 2 SO 4 .…”

Section: Scs’ Performancementioning

confidence: 99%

Thermally Stabilized Soot for Supercapacitors

Petrov

Lovchinov

Slavov

et al. 2021

Physica Status Solidi (a)

View full text Add to dashboard Cite

Soot is used as an electrode material for possible supercapacitance applications. The carbonaceous product is collected from a domestic heating system and possesses a naturally developed high surface area, which is one of the key requirements for such applications. The low‐molecular‐weight compounds in the soot are evaporated and carbonized by heat treatment of the samples in the range 400–800 °C. The heating at different temperatures causes different degrees of carbonization, functional groups removal, and samples’ stabilization. The capacitance is compared of prototypes with electrodes made from materials treated at different temperatures. The prototype samples are investigated by Fourier transform infrared spectroscopy and transmission electron microscopy, revealing sequentially removed functional groups and a variety of carbon structures, such as graphene sheets, monocrystalline carbon particles, and onion‐like structures.

show abstract

Synthesis of copper oxides films via anodic oxidation of copper foil followed by thermal reduction

Cited by 17 publications

References 25 publications

Determination of the Influence of Various Factors on the Character of Surface Functionalization of Copper(I) and Copper(II) Oxide Nanosensors with Phenylboronic Acid Derivatives

Determination of the Influence of Various Factors on the Character of Surface Functionalization of Copper(I) and Copper(II) Oxide Nanosensors with Phenylboronic Acid Derivatives

Hydrophilic and Hydrophobic Nanostructured Copper Surfaces for Efficient Pool Boiling Heat Transfer with Water, Water/Butanol Mixtures and Novec 649

Thermally Stabilized Soot for Supercapacitors

Contact Info

Product

Resources

About