Robust, Easy‐Cleaning Superhydrophobic/Superoleophilic Copper Meshes for Oil/Water Separation under Harsh Conditions

Pang, Bo; Liu, Huan; Liu, Peiwen; Zhang, Hua; Avramidis, Georg; Chen, Longquan; Deng, Xu; Viöl, Wolfgang; Zhang, Kai

doi:10.1002/admi.201900158

Cited by 23 publications

(16 citation statements)

References 30 publications

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“…The hierarchical CuO-coated mesh is fabricated through the oxidation-dehydration process, [27,32,38] which is schematically illustrated in Scheme 1. In this work, the commercial cupper (Cu) mesh is utilized as the source substrate knitted by 36.8 µm diameter copper wires with an average pore size of ≈40 µm.…”

Section: Fabrication and Characterization Of Underwater Superoleophobic Cuo-coated Meshmentioning

confidence: 99%

“…Copper oxide (CuO), a visible light responsive semiconductor, has been widely served as a catalyst for either photodegradation of organic contaminants in wastewater treatment, or photodynamic antibacterial applications. [27,[30][31][32][33][34] However, the combined use of photodegradation and antibacterial activity of CuO in superwetting materials to enable the restoration of superwetting property after the materials have been fouled is rare. Herein, we develop a facile and environmentally benign strategy to fabricate CuOcoated meshes that are superhydrophilic and underwater superoleophobic and can be used in water remedy.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional CuO‐Coated Mesh for Wastewater Treatment: Effective Oil/Water Separation, Organic Contaminants Photodegradation, and Bacterial Photodynamic Inactivation

Meng

Zhang

Wang

et al. 2021

Adv Materials Inter

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wastewater systems contain many complex contaminants such as insoluble oils, organic dyes, and bacteria, making the wastewater cleanup in a single-step highly challenging. [3][4][5][6] Traditional treatment methods, including controlled burning, absorption, air flotation, skimming, gravity separation, coagulation, photocatalytic degradation, and bioremediation, are required for water purification, whereas for a complete wastewater cleanup, traditional multiple methods are required. [7][8][9][10][11][12] Therefore, developing multifunctional materials that can deal with multiple contaminants simultaneously to achieve the complex wastewater cleanup are greatly favored.Inspired by nature, the materials with special superwetting surfaces have received more considerable attention for wastewater cleanup because of their low energy consumption, high efficiency and specific selectivity. [13][14][15][16][17][18][19][20][21] In the past decade, a rich library of superhydrophobic/ superoleophilic materials that can selectively absorb or filter the oils out from oil/ water mixtures, has been developed for the purpose of wastewater treatment. [22][23][24][25] A common drawback in using those materials is that they are easily fouled or even clogged by the permeated oils, consequently, leading to a dramatic decline of their separation capacity and recyclability in the subsequent use. In contrast, the superhydrophilic and The complex pollutants in wastewater including insoluble oils, organic dyes, and bacteria, have caused severe environmental problems, which are harmful to ecosystems and human health and are complex and difficult to achieve wastewater purification with one material or single procedure. Herein, a facile, yet environmentally benign strategy is proposed to fabricate a superhydrophilic/underwater superoleophobic CuO-coated mesh for all-in-one wastewater treatment. In this strategy, the hierarchical micro/nano structured CuO-coated mesh is fabricated via an oxidation-dehydration process, which simultaneously endows the mesh with superwetting ability, remarkable photocatalytic degradation ability, and excellent photodynamic antibacterial activity. This CuO-coated mesh first exhibits the special underwater superoleophobicity, superior durability, reusability, and high antifouling capability, which ensures its high separation efficiency for oil/water mixtures. Then, this CuO-coated mesh is underwater superoleophobic, possessing the remarkable photocatalytic degradation performance of organic dye contaminates in water and excellent photodynamic antibacterial activities against Escherichia coli and Staphylococcus aureus under visible-light irradiation. As such, it plays a multi-role in wastewater remedy, significantly simplifying the implementation and saving the cost in practice. This work suggests a promising approach for the design of multi-functional materials in environmental remedies.

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Section: Fabrication and Characterization Of Underwater Superoleophobic Cuo-coated Meshmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multifunctional CuO‐Coated Mesh for Wastewater Treatment: Effective Oil/Water Separation, Organic Contaminants Photodegradation, and Bacterial Photodynamic Inactivation

Meng

Zhang

Wang

et al. 2021

Adv Materials Inter

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“…However, the exploitation of porous superhydrophobic filtration media with durable performance that can be used in harsh environment remains a great challenge 26–30 . The selection of material and the construction of structure are key to achieving the durability of filtration media.…”

Section: Introductionmentioning

confidence: 99%

“…However, the exploitation of porous superhydrophobic filtration media with durable performance that can be used in harsh environment remains a great challenge. [26][27][28][29][30] The selection of material and the construction of structure are key to achieving the durability of filtration media. It is well known that polytetrafluoroethylene (PTFE) has the advantage of chemical and temperature resistance, which means that it is one of the optimal choices for filtration media with durable performance.…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

Guo

Yao

Zhu

et al. 2022

Polymer International

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Porous superhydrophobic filtration media with durable performance that can be used in harsh environments remain an urgent requirement. Here, we designed and prepared a porous polytetrafluoroethylene (PTFE)/C composite foam derived from PTFE/glutaraldehyde‐crosslinked poly(vinyl formal) foam via a method of low‐temperature in situ carbonization by the combination of sintering in nitrogen atmosphere and oxygen atmosphere. The as‐prepared porous PTFE/C composite foam had an interconnected macropore structure and wettability of superhydrophobicity. Meanwhile, the porous skeleton of the PTFE/C composite foam showed a skin–core microstructure with the functional skin layer of PTFE continuous phase and the support core of PTFE and carbon in situ composite phase. The PTFE functional layer was anchored to the support composite layer in a root‐like branching, which endows the porous PTFE/C composite foam with an extremely durable performance. In gravity‐driven oil–water separation, the porous PTFE/C composite foam achieved considerable oil flux (from 27 174 to 73 242 L h−1 m−2) and purity (as high as 99.83 wt%). Meanwhile, the porous PTFE/C composite foam presented resistance to strong acids, strong alkalis, chemical solvents and friction. Even after it had been mechanically damaged, the superhydrophobic properties of the foam were not degraded. The as‐prepared porous PTFE/C composite foam showed great potential in all kinds of harsh environments. © 2021 Society of Industrial Chemistry.

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“…(see Figure 2), known in the scientific literature as superhydrophobic, superomniphobic or supernonwetting depending on the liquids involved [6][7][8][9][10], opens a broad range of potential practical relevance. It includes, but is not limited to self-cleaning surfaces [11][12][13], passive icephobic [14][15][16] and anti-bioadhesive coatings [17][18][19], systems for removal of oil contamination from water basins [20][21][22][23], anti-corrosive coatings [24][25][26], drag-reducing surfaces [27][28][29][30], pervaporation membranes [31,32], green engineering [33] or piezoresonance chemical and biological sensors [34][35][36][37][38]. [18,37,38].…”

Section: Introductionmentioning

confidence: 99%

From Extremely Water-Repellent Coatings to Passive Icing Protection—Principles, Limitations and Innovative Application Aspects

Esmeryan¹

2020

Coatings

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The severe environmental conditions in winter seasons and/or cold climate regions cause many inconveniences in our routine daily-life, related to blocked road infrastructure, interrupted overhead telecommunication, internet and high-voltage power lines or cancelled flights due to excessive ice and snow accumulation. With the tremendous and nature-inspired development of physical, chemical and engineering sciences in the last few decades, novel strategies for passively combating the atmospheric and condensation icing have been put forward. The primary objective of this review is to reveal comprehensively the major physical mechanisms regulating the ice accretion on solid surfaces and summarize the most important scientific breakthroughs in the field of functional icephobic coatings. Following this framework, the present article introduces the most relevant concepts used to understand the incipiency of ice nuclei at solid surfaces and the pathways of water freezing, considers the criteria that a given material has to meet in order to be labelled as icephobic and clarifies the modus operandi of superhydrophobic (extremely water-repellent) coatings for passive icing protection. Finally, the limitations of existing superhydrophobic/icephobic materials, various possibilities for their unconventional practical applicability in cryobiology and some novel hybrid anti-icing systems are discussed in detail.

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Robust, Easy‐Cleaning Superhydrophobic/Superoleophilic Copper Meshes for Oil/Water Separation under Harsh Conditions

Abstract: COMMUNICATION 1900158 (1 of 8)

Cited by 23 publications

References 30 publications

Multifunctional CuO‐Coated Mesh for Wastewater Treatment: Effective Oil/Water Separation, Organic Contaminants Photodegradation, and Bacterial Photodynamic Inactivation

Multifunctional CuO‐Coated Mesh for Wastewater Treatment: Effective Oil/Water Separation, Organic Contaminants Photodegradation, and Bacterial Photodynamic Inactivation

Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

From Extremely Water-Repellent Coatings to Passive Icing Protection—Principles, Limitations and Innovative Application Aspects

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