MoS2/CuS nanosheets coated on brass mesh with switchable superwettability for efficient immiscible organic solvent/water separation

Wang, Wenwen; Jiao, Shihui; Wang, Boran; Tan, Yi; Zhao, Yüe; Zhang, Qi; Kang, Yutang; Lv, Xinyan; Cui, Canyu; Pang, Guangsheng

doi:10.1016/j.apsusc.2021.151128

Cited by 22 publications

(10 citation statements)

References 66 publications

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“…The line scanning image of Cu Kα on Cu-CuS/BM (Figure e) shows a significant increase in the content of the Cu element on the nanoparticles, indicating that the component of the nanoparticles is copper. From the HRTEM images, the crystalline phases of CuS/BM (Figure f) and Cu-CuS/BM (Figure g) were identified, with the same lattice distance of 0.19 and 0.32 nm corresponding to the (110) and (101) lattice planes of CuS, respectively. , Furthermore, the lattice distance of 0.21 nm for Cu-CuS/BM was observed, which corresponds to the (111) lattice plane of Cu . The above results of HRTEM indicated the successful synthesis of Cu-CuS/BM.…”

Section: Resultsmentioning

confidence: 63%

“…From the HRTEM images, the crystalline phases of CuS/BM (Figure 1f) and Cu-CuS/BM (Figure 1g) were identified, with the same lattice distance of 0.19 and 0.32 nm corresponding to the (110) and (101) lattice planes of CuS, respectively. 32,33 Furthermore, the lattice distance of 0.21 nm for Cu-CuS/BM was observed, which corresponds to the (111) lattice plane of Cu. 34 The above results of HRTEM indicated the successful synthesis of Cu-CuS/BM.…”

Section: ■ Introductionmentioning

confidence: 92%

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Copper Nanoparticles Dotted on Copper Sulfide Nanosheets for Selective Electrocatalytic Oxidation of Glycerol to Formate

Qin

Dou

et al. 2022

ACS Appl. Nano Mater.

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This work provides a simple method for the development of a high-activity non-noble metal catalyst for the oxidation of glycerol (GLY) to formate. CuS nanosheet arrays are grown in situ on the brass mesh by low-temperature sulfuration, and then copper nanoparticles are uniformly dotted on CuS nanosheets through disproportionation reaction. As-fabricated Cu-CuS/BM is used for glycerol oxidation reaction (GOR), and the current density can reach 10 mA·cm–2 when the potential is 1.37 V vs RHE. A high selectivity of 86.0% and a Faradaic efficiency of 90.4% for formate production are achieved, and the average selectivity of 20 consecutive cycles of electrolysis is 82.6%, confirming the excellent activity and stability of Cu-CuS/BM. The formation of formate as the main oxidation product that conforms to the primary alcohol oxidation path is proved through high-performance liquid chromatography and in situ Fourier transform infrared spectroscopy. The mechanism of GOR induced by Cu-CuS/BM is proposed through density functional theory calculation and X-ray photoelectron spectroscopy analysis, in which the combination of copper nanoparticles and CuS significantly enhances the adsorption for GLY, and Cu(II) produced during the GOR facilitates the adsorption for OH– to form Cu(II)-OHads on the catalyst surface, which is beneficial to the oxidation of absorbed GLY.

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Section: Resultsmentioning

confidence: 63%

Section: ■ Introductionmentioning

confidence: 92%

Copper Nanoparticles Dotted on Copper Sulfide Nanosheets for Selective Electrocatalytic Oxidation of Glycerol to Formate

Qin

Dou

et al. 2022

ACS Appl. Nano Mater.

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“…The process of emulsion separation generally consists of contact between the membrane and emulsified oil/water droplets, leading to emulsion breakage, followed by the aggregation of water/oil droplets . Due to the superlyophilicity of the ZnO@SSM membrane with θ nearly 0° in air, Δ P < 0, water can permeate into the membrane automatically (Figure a) . When the membrane is dipped in O/W, due to the preferential affinity of the membrane with water, the interspaces of nanopores can be filled with a water phase, forming the oil–water–solid three-interface system, thus exhibiting underwater superoleophobicity (Figure c) .…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Fusiform ZnO-Constructed Nanoflowers Electrodeposited on Stainless-Steel Mesh with Switchable Wettability for On-Demand Separation of Oil–Water Emulsion and Photocatalytic Degradation for Water-Soluble Pollutants

Yang,

Li,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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Hierarchical zinc oxide (ZnO) micronano structures have attracted plenty of research interests, which are extensively applied in emulsion separation and photocatalysis. In this study, fusiform ZnO-constructed nanoflowers were coated on a stainless-steel mesh (SSM) via an easy one-step electrodeposition approach. The ZnO@SSM membrane exhibited excellent superhydrophilicity with a water contact angle (WCA) of approximately 0° and underwater superoleophobicity with an underwater–oil contact angle (UOCA) of 164.3°. Reversible wettability transformation of the ZnO@SSM membrane between superhydrophilicity/underwater superoleophobicity and superhydrophobicity/superoleophilicity was quickly achieved by the alternate treatment on the membrane with stearic acid (SA) ethanol solution and NaOH solution. The designed membrane can synchronously possess considerable oil–water emulsion separation capacity and efficient photocatalytic degradation for a water-soluble pollutant. The separation efficiency (SE) of surfactant-stabilized emulsion was greater than 99.0%, along with fast permission fluxes up to 489.4 L·m–2·h–1 (oil-in-water) and 676.0 L·m–2·h–1 (water-in-oil). The maximum degradation efficiency for methylene blue (MB) solution was up to 99.0% under visible-light irradiation in 90 min. This novel, sustainable, and multifunctional membrane with a hierarchical structure of fusiform ZnO-constructed nanoflowers has a wide application prospect in the treatment of practically emulsified wastewater.

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“…The wettability of the membrane significantly affects the separation of the oil–water mixture and the oil–water emulsion [ 42 ], so the wettability of the membranes was characterized, as shown in Figure 5 . In addition, the micro-roughness is closely related to wettability [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

PDMS/PVDF Electrospinning Membranes for Water-in-Oil Emulsion Separation and UV Protection

et al. 2022

Biomimetics

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With industry development, the separation of oily wastewater is becoming more critical. Inspired by organisms such as lotus leaves, biomimetic superhydrophobic surfaces with micro-nano structures have shown great potential in this regard. In this work, PDMS/PVDF oil–water separation membranes with designed microstructures were prepared by electrospinning technology. The membrane-forming effect of electrospinning with different ratios of PDMS and PVDF was studied. The study found that membranes with high PDMS content were more likely to form microspheres, and PDMS tended to concentrate on the microspheres. The results also showed that the microspheres would bring better hydrophobicity to the membrane. When the ratio of PDMS to PVDF is 1:2, the membrane has a water contact angle of up to 150° and an oil contact angle of 0°. At this ratio, the separation efficiency of the membrane for the water-in-oil emulsion is 98.7%, and it can still maintain more than 98% after ten separation cycles, which is a good candidate for oil–water separation. Furthermore, microspheres enable the membrane to achieve macroscopic uniformity and microscopic phase separation so that the membranes have both good elongation and fracture strength. In addition, the PDMS/PVDF membranes also exhibit excellent UV resistance, and their UV protection factor is greater than 185, making them a potential UV protective material.

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MoS2/CuS nanosheets coated on brass mesh with switchable superwettability for efficient immiscible organic solvent/water separation

Cited by 22 publications

References 66 publications

Copper Nanoparticles Dotted on Copper Sulfide Nanosheets for Selective Electrocatalytic Oxidation of Glycerol to Formate

Copper Nanoparticles Dotted on Copper Sulfide Nanosheets for Selective Electrocatalytic Oxidation of Glycerol to Formate

Hierarchical Fusiform ZnO-Constructed Nanoflowers Electrodeposited on Stainless-Steel Mesh with Switchable Wettability for On-Demand Separation of Oil–Water Emulsion and Photocatalytic Degradation for Water-Soluble Pollutants

PDMS/PVDF Electrospinning Membranes for Water-in-Oil Emulsion Separation and UV Protection

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