Change in properties upon thermal treatment of copper sulphide powder and thin films

Mohamed, S. H.; Awad, M. A.; Hafez, Mohamed Ismail; Hadia, N. M. A.

doi:10.1007/s12034-021-02379-5

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…Copper oxides such as cuprite (Cu 2 O) and cuprous (CuO) are important metal oxides that can be synthesized with excellent morphological, catalytic and electrochemical characteristics which support their utilization in various applications [1][2][3]. For example, Cu 2 O, with optical band gap in the range 2.1-2.6 eV and a p-type conductivity, has shown to be an effective catalyst in biosensors [4,5], active absorber in the field of solar cells [6], negative electrode for flexible Li-ion microbatteries [7] and nanocatalyst for treating organic pollutants present in water [8].…”

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confidence: 99%

Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Alqahtani,

Mohamed,

Hadia

et al. 2024

Phys. Scr.

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Cu/Cu2O/CuO heterojunction were synthesized, using thermal oxidation under the flow of argon and oxygen gas mixture, as efficient photoelectrode for hydrogen generation. The Cu/Cu2O/CuO heterojunction were synthesized using un-roughed and roughed Cu foils. The resulting heterojunction samples were characterized using various techniques. The evaluated oxide layer (Cu2O/CuO) thicknesses for un-roughed and roughed samples are 4.2 and 8.5 m, respectively. XRD revealed that the oxide layer is a mix cubic Cu2O and monoclinic CuO crystalline phases with higher CuO ratio in the roughed sample. The surface morphology of the un-roughed sample is a porous surface that consisting of nanoflakes whereas surface morphology of the roughed sample is randomly oriented nanowires. The Cu/Cu2O/CuO nanostructured surface is superhydrophilic, with water contact angles of 11.12 and 0° for un-roughed and roughed samples, respectively. The roughed sample has higher absorbance over the entire studied wavelength range. The obtained values of the optical band gap for un-roughed and roughed samples are 2.48 and 2.39 eV, respectively. The photocurrent density of the roughed photoelectrode is much greater than that of un-roughed photoelectrode. The roughed photoelectrode has a photocurrent density of – 0.151 mA/cm2 at – 0.85 V and a photoconversion efficiency of 0.55 % when illuminating with 340 nm light. This work offers a promised Cu/Cu2O/CuO photoelectrode for hydrogen generation from seawater.

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Section: Introductionmentioning

confidence: 99%

Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Alqahtani,

Mohamed,

Hadia

et al. 2024

Phys. Scr.

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Metal‐Thiolate Framework for Electrochemical and Photoelectrochemical Hydrogen Generation

et al. 2022

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Hydrogen has evolved as the cleanest and most sustainable fuel, produced directly from naturally abundant water resources. Generation of hydrogen by electrochemical or photoelectrochemical splitting of water has been conceived as the most effective method for hydrogen production. Herein, a robust solid metal-thiolate framework (MTF-1) was obtained by hydrothermal crystallization of the reaction mixture consisting of 1,3,5-triazine-2,4,6-trithioltrisodium salt and Cu II under mild synthesis conditions. The material was thoroughly characterized and explored as efficient catalyst for electrochemical and photoelectrochemical hydrogen evolution reaction (HER) via water splitting reactions. MTF-1 showed onset potential 0.045 V RHE and overpotential η(@10 mA cm À 2 ) at 0.096 V RHE . The electrochemical surface area of MTF-1 was found to be 509 m 2 g À 1 . The photo current density at pH 5.0 was found to be 0.487 mA cm À 2 at 0.6 V RHE . The feasibility of the reaction pathway was correlated from the density function theory study, which suggested the complete downhill energetics indicating spontaneous electrochemical hydrogen generation in the acidic medium.

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Electrical resistivity and magnetic susceptibility of substoichiometric CdO and In doped CdO films

Awad

Mohamed

2021

Appl. Phys. A

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Change in properties upon thermal treatment of copper sulphide powder and thin films

Cited by 8 publications

References 27 publications

Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Metal‐Thiolate Framework for Electrochemical and Photoelectrochemical Hydrogen Generation

Electrical resistivity and magnetic susceptibility of substoichiometric CdO and In doped CdO films

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Change in properties upon thermal treatment of copper sulphide powder and thin films

Cited by 8 publications

References 27 publications

Some characteristics of Cu/Cu2O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Some characteristics of Cu/Cu2O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Metal‐Thiolate Framework for Electrochemical and Photoelectrochemical Hydrogen Generation

Electrical resistivity and magnetic susceptibility of substoichiometric CdO and In doped CdO films

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Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening

Some characteristics of Cu/Cu₂O/CuO nanostructure heterojunctions and their applications in hydrogen generation from seawater: effect of surface roughening