The coating and reduction of graphene oxide on meshes with inverse wettability for continuous water/oil separation

Lü, Hui; Sha, Simiao; Yang, Shaolin; Wu, Jiandong; Ma, Jingtan; Hou, Chunping; Sheng, Zhilin

doi:10.1016/j.apsusc.2020.147948

Cited by 40 publications

(21 citation statements)

References 28 publications

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“…As a result of the high oil–water separation efficiency, excellent anti-oil-fouling property, and good stability, the prepared underwater superoleophobic mesh in this study is an ideal effective candidate for broad applications in oil/water separations [ 143 ]. Lu et al [ 44 ] reported a mild, environmentally friendly, and cost-effective method to synthesize graphene oxide (GO) and reduced graphene oxide (RGO) coated meshes with superoleophobicity and superhydrophilicity/underwater. The GO-coated meshes showed a high unidirectional separation efficiency for water mixtures with various light oils, while the RGO-coated meshes exhibited an outstanding capability of separating several types of heavy oils from water.…”

Section: Graphene-based Membranes In Oil/water Separationmentioning

confidence: 99%

“…One of the most critical issues related to the oil–water separation is surface wettability. The control of such wettability can allow one phase permeation and repel the other phase [ 44 ]. Accordingly, water/oil separation materials or membranes are generally divided into two categories: super hydrophobic/superhydrophilic membranes and hydrophilic/underwater superhydrophobic.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of unidirectional separation of light oil/water mixtures, it is reported that light oil molecules will be trapped between the water layer and the water repellent membranes. As a result, the importance of inverse wettability membranes was highlighted for effective and continuous oil/water separation [ 44 ]. The fabrication of such membranes was achieved by coating a number of materials such as metal meshes, sponges, polymers, metal oxides, and many others.…”

Section: Introductionmentioning

confidence: 99%

“…The fabrication of such membranes was achieved by coating a number of materials such as metal meshes, sponges, polymers, metal oxides, and many others. Chemical and electrical depositions, in addition to hydrothermal reaction pathways, were reported with many challenges ranging from the need for specialized equipment, to the use of toxic reagents and time-consuming procedures [ 44 ]. Accordingly, and in an effort to overcome such complexity, graphene and its derivatives have been vastly investigated [ 44 , 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

confidence: 99%

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Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

et al. 2021

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The vast demand for petroleum industry products led to the increased production of oily wastewaters and has led to many possible separation technologies. In addition to production-related oily wastewater, direct oil spills are associated with detrimental effects on the local ecosystems. Accordingly, this review paper aims to tackle the oil spill cleanup issue as well as water separation by providing a wide range of graphene-based technologies. These include graphene-based membranes; graphene sponges; graphene-decorated meshes; graphene hydrogels; graphene aerogels; graphene foam; and graphene-coated cotton. Sponges and aerogels modified by graphene and reduced graphene oxide demonstrated effective oil water separation owing to their superhydrophobic/superoleophilic properties. In addition, oil particles are intercepted while allowing water molecules to penetrate the graphene-oxide-coated metal meshes and membranes thanks to their superhydrophilic/underwater superoleophobic properties. Finally, we offer future perspectives on oil water separation that are hindering the advancements of such technologies and their large-scale applications.

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Section: Graphene-based Membranes In Oil/water Separationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

et al. 2021

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“…In recent years, abundant oily wastewater generated in industrial elds such as textiles, food processing, metal smelting, leather reform, and petrochemicals, as well as crude oil waste caused by frequent offshore oil spills, have attracted increasing attentions due to the already revealed critical threats to the ecosystem and human health [1][2][3] . As a research hotspot, high-performance oil/water separation material shows excellent e cacy in the treatment of oily wastewater [4][5][6] . With a deep understanding of the special wettability, a membrane with the characteristic of selectively wetting provides a reliable method for achieving highly e cient oil/water separation performance [7,8] .…”

Section: Introductionmentioning

confidence: 99%

Robustly superhydrophobic polylactic acid nonwoven membranes for efficient oil/water separation

Cui

et al. 2021

J Porous Mater

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Oily wastewater is an urgent issue threatening the ecosystem and human health. Superhydrophobic porous materials are widely concerned as promising candidates for effective oil/water separation and oil adsorption. However, superhydrophobic porous materials are still confronted with frustrations such as complex preparation processes and secondary pollution to the environment. Superhydrophobic porous materials with biodegradability and a relatively simple preparation process are more attractive to practical application and environmental protection. In this work, biodegradable and industrially applied polylactic acid (PLA)nonwoven materials were used as porous membranes, then PLA nanoparticles were loaded on the membrane surface to construct the hierarchical rough structure. The modi ed PLA nonwoven membrane (Nano-PLA) shows superhydrophobicity and e cient oil/water separation performance. Moreover, strong mechanical strength and acceptable toughness are obtained. This work offers an easily controlled and industrially used pathway for the design of robust, highly selective, and biodegradable oil/water separation materials.

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Melamine Foam with pH‐Responsive Wettability for Fast Oil Absorption and Desorption

Xie

Yang

et al. 2022

Adv Materials Inter

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Innovative 3D materials with the switchable wetting surface attract significant attention due to their application in oil/water separation. Herein, a fast pH‐responsive and highly effective melamine foam (MF) grafted with poly (2‐dimethylaminoethyl methacrylate) is prepared by surface‐initiated chain transfer radical polymerization. The as‐prepared MF displays superhydrophilic and superoleophobic surface in strong acid solution while it becomes superhydrophobic in neutral or basic solution. Therefore, it can be rapid to selectively absorb different types of oils from the oil–water mixture with a great absorption capacity of 54–117 g g−1 and automatically desorb oil in less than 60 s with a desorption efficiency of 99% (dichloromethane) in acid solution. Moreover, the as‐prepared MF possesses excellent recyclability, and the absorption capacity and the desorption efficiency are almost unchanged after 15 cycles. The pH‐sensitive MF with switchable wetting surfaces has great potential for the oily water separation.

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The coating and reduction of graphene oxide on meshes with inverse wettability for continuous water/oil separation

Cited by 40 publications

References 28 publications

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

Robustly superhydrophobic polylactic acid nonwoven membranes for efficient oil/water separation

Melamine Foam with pH‐Responsive Wettability for Fast Oil Absorption and Desorption

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