Hydrophobic Cu2O surfaces prepared by chemical bath deposition method

Akbari, Raziyeh; Aminian, M. Khajeh; Abbasnejad, Mohaddeseh

doi:10.1007/s00339-019-2470-7

Cited by 21 publications

(14 citation statements)

References 52 publications

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“…The pore former is added to make the membrane more porous, allowing for higher water flux and solute rejection [39]. The addition of Cu 2 O to the PVDF membrane's outer layer improves the membrane's hydrophilicity [40]. When the membrane's outer layer is hydrophilic, it allows a lot of water to flow into the pore.…”

Section: Resultsmentioning

confidence: 99%

Bisphenol A Removal Using Visible Light Driven Cu2O/PVDF Photocatalytic Dual Layer Hollow Fiber Membrane

et al. 2022

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Bisphenol A (BPA) is amongst the endocrine disrupting compounds (EDCs) that cause illness to humans and in this work was removed using copper (I) oxide (Cu2O) visible light photocatalyst which has a narrow bandgap of 2.2 eV. This was done by embedding Cu2O into polyvinylidene fluoride (PVDF) membranes to generate a Cu2O/PVDF dual layer hollow fiber (DLHF) membrane using a co-extrusion technique. The initial ratio of 0.25 Cu2O/PVDF was used to study variation of the outer dope extrusion flowrate for 3 mL/min, 6 mL/min and 9 mL/min. Subsequently, the best flowrate was used to vary Cu2O/PVDF for 0.25, 0.50 and 0.75 with fixed outer dope extrusion flowrate. Under visible light irradiation, 10 mg/L of BPA was used to assess the membranes performance. The results show that the outer and inner layers of the membrane have finger-like structures, whereas the intermediate section of the membrane has a sponge-like structure. With high porosity up to 63.13%, the membrane is hydrophilic and exhibited high flux up to 13,891 L/m2h. The optimum photocatalytic membrane configuration is 0.50 Cu2O/PVDF DLHF membrane with 6 mL/min outer dope flowrate, which was able to remove 75% of 10 ppm BPA under visible light irradiation without copper leaching into the water sample.

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Section: Resultsmentioning

confidence: 99%

Bisphenol A Removal Using Visible Light Driven Cu2O/PVDF Photocatalytic Dual Layer Hollow Fiber Membrane

et al. 2022

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“…In fact, It is difficult to detect these changes using the ordinary chemical composition characterization methods (XPS, FTIR, PL and etc.) because the penetration depth of such methods is much larger than the surface layer and the corresponding peaks of copper and different copper oxides (Cu x O) are overlapped ,. This exciting phenomenon, which can solve the challenge of durability of superhydrophobic property of the surfaces in industries, still needs more precisely surveys in theory and practice.…”

Section: Discussionmentioning

confidence: 99%

“…Fabrication of mineral thin films is performed by different coating stimuli such as sol‐gel based methods, chemical and physical vapor deposition, electrodeposition, sputtering and thermal oxidation . Among them, the electrodeposition method has advantages in fabrication of mineral layers on the conductive substrates due to its high efficiency, cost‐effectiveness and quality of deposited layer.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Superhydrophobic Hierarchical Surfaces by Square Pulse Electrodeposition: Copper‐Based Layers on Gold/Silicon (100) Substrates

et al. 2019

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Copper based layers were fabricated on gold/silicon (100) substrates by using square pulse electrodeposition at different deposition temperatures. The predominant crystalline plane on Cu 2 O samples at temperatures higher than 30°C is (111), which is the most hydrophobic facet of Cu 2 O cubic structure. Different crystallite structures such as semivertical leaves, fractal trees, and octahedral pyramids were formed on the surface. These water-repellent samples have hierarchical structures, including octahedral pyramid microstructures with small spherical balls on them and well-branched micrometric vertical leaves on the surface. They provide a suitable surface for trapping air pockets inside the structure and increasing the water contact angle up to 154°. This approach may be applicable to the large-scale preparation of water-repellent surfaces as superhydrophobicity can be achieved in a one-step deposition process without any secondary modifications.[a] M. optical microscope (Bruker) with High Mag. Phase Shift Interference (PSI), field of view 0.5X and objective 50X.

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“…16 Akbari et al reported hydrophobic Cu 2 O surfaces and studied that hydrophobicity was controlled by sintering conditions by lateral migration of copper ions on the surface during thermal processing and related change of the oxygen amount in the copper oxide structure. 17 Chang et al also reported tuning of the wetting behavior of copper oxide systems using thermal annealing. 18 Recently, Lei et hierarchical copper oxide structures and explored them for oil− water separation.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Das et al studied welded network formation of Cu 2 O nanowires and explored its contribution in higher electrical conductivity and water repellency . Akbari et al reported hydrophobic Cu 2 O surfaces and studied that hydrophobicity was controlled by sintering conditions by lateral migration of copper ions on the surface during thermal processing and related change of the oxygen amount in the copper oxide structure . Chang et al also reported tuning of the wetting behavior of copper oxide systems using thermal annealing .…”

Section: Introductionmentioning

confidence: 99%

Alteration of Wettability of Copper–Copper Oxide Nanocomposites through Cu–O Bond Breaking Swayed by Ultraviolet and Electron Irradiation

Das

Giri²,

Manju

et al. 2021

Langmuir

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Converting a nonwetting surface to a highly wetting one, aided by ultraviolet radiation, is well explored. Here, in this work, we show just the reverse behavior of a copper–copper oxide nanocomposite surface where ultraviolet radiation turned the superhydrophilic surface to a superhydrophobic one. This observation is explained both experimentally and theoretically using first-principles density functional theory-based calculations considering the metal–oxygen (Cu–O) bond breaking and related change in surface chemistry. This observation has further been corroborated with electron irradiation on the same nanocomposite material. To the best of our knowledge, for the first time, we show that the radiation-induced breaking of the copper–oxygen bond makes the nanostructure surface energetically unfavorable for water adsorption.

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Hydrophobic Cu2O surfaces prepared by chemical bath deposition method

Cited by 21 publications

References 52 publications

Bisphenol A Removal Using Visible Light Driven Cu2O/PVDF Photocatalytic Dual Layer Hollow Fiber Membrane

Bisphenol A Removal Using Visible Light Driven Cu2O/PVDF Photocatalytic Dual Layer Hollow Fiber Membrane

Fabrication of Superhydrophobic Hierarchical Surfaces by Square Pulse Electrodeposition: Copper‐Based Layers on Gold/Silicon (100) Substrates

Alteration of Wettability of Copper–Copper Oxide Nanocomposites through Cu–O Bond Breaking Swayed by Ultraviolet and Electron Irradiation

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