UiO-66-Coated Mesh Membrane with Underwater Superoleophobicity for High-Efficiency Oil–Water Separation

Zhang, Xiaojing; Zhao, Yuxin; Mu, Shanjun; Jiang, Chunming; Song, Mingming; Fang, Qianrong; Xue, Ming; Qiu, Shilun; Chen, Banglin

doi:10.1021/acsami.8b05137

Cited by 129 publications

(53 citation statements)

References 62 publications

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“…Its absorption capacity (≈40–70 wt%) and flux (85 ± 5 mL −2 s −1 ) are high and remained unchanged even after ten cycles (Figure d) . Chen and coworkers recently reported a UiO‐66‐coated mesh superoleophobic membrane that shows significant separation efficiency, almost 99.99% oils from water . Moreover, a USTC‐6@GO@sponge displays great uptake and absorption rates for organic solvents and oils ranging from 1200 to 4300 wt% .…”

Section: Potential Applications Of Hydrophobic Mofs and Their Compositesmentioning

confidence: 93%

“…One way to avoid the limitations associated with tailoring the functional properties of hydrophobic MOFs solely by varying the combinations of nodes and linkers is to make hybrid of MOFs with other materials (i.e., 2D materials, polymers, etc.). The final approach involves the synthesis of hierarchical micro‐mesoporous composites based on the hybridization of microporous MOFs intercalated with hydrophobic 2D layers/membranes (Figure d) . After the initial steps of the development of different hydrophobic MOF materials and composites, recent studies on hydrophobic MOFs have focused on some critical challenges in the measurement of hydrophobicity by various methods, and the issues they create in practical applications.…”

Section: Synthesis Of Hydrophobic Mof Materialsmentioning

confidence: 99%

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Hydrophobic Metal–Organic Frameworks

et al. 2019

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formed from organic ligands and metal cations. [1][2][3][4][5][6][7][8][9][10] They are typically synthesized under mild conditions via coordinationdirected self-assembly processes and are also known as metal-organic coordination networks and porous coordination polymers. [11][12][13][14] Due to their high surface areas, large porosity, tunable pore sizes, and functionalities, MOFs have prospective applications in fields such as gas storage/separation, sensing or recognition, proton conduction, and magnetism. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] However, the advantageous unique structural features of even some of the best-performing MOFs are readily degraded because of their high moisture sensitivity, which may limit their practical applications. [29][30][31][32] Consequently, there is an ongoing search for highly hydrophobic, porous, sorbent materials to be employed in various large-scale applications in industry such as oil spill cleanup, hydrocarbon storage/separation, or water purification. [33][34][35][36][37] Many academics, industrial scientists, and engineers have therefore conducted research on the fabrication of superhydrophobic surfaces, which involves hydrophobic surface modification and creating surface roughness on the micrometer-or nanoscale. Hydrophobic surfaces are defined as substrates with an apparent contact angle greater than 90° with respect to water. On superhydrophobic materials, water droplets have contact angles above 150° and show very low adhesion because the drops partially rest on an air cushion. The surface energy and roughness govern the wettability of hydrophobic surfaces. In general, lower surface energies and higher roughness are associated with larger contact angles, lower contact angle hysteresis, and robust superhydrophobicity. Because of their ultralow surface energies (10-20 mN m −1 ), alkyl-based or fluorinated compounds are commonly used as hydrophobic modifiers to prepare surfaces with high intrinsic contact angles (>90°). [33][34][35][36][37][38][39][40][41][42] Recently, few methods have been developed for synthesizing hydrophobic MOFs including both pristine and composite systems. This review offers a comprehensive overview of the state of the art in hydrophobic MOF synthesis and the field's challenges and opportunities. Various synthetic strategies for preparing hydrophobic MOFs and their composites are introduced. We discuss the basics of wetting and critical challenges in the characterization of these hydrophobic materials. The potential applications of hydrophobic MOFs and related Metal-organic frameworks (MOFs) have diverse potential applications in catalysis, gas storage, separation, and drug delivery because of their nanoscale periodicity, permanent porosity, channel functionalization, and structural diversity. Despite these promising properties, the inherent structural features of even some of the best-performing MOFs make them moisture-sensitive and unstable in aqueous media, limiting their practical usefulness. This problem could be ...

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Section: Potential Applications Of Hydrophobic Mofs and Their Compositesmentioning

confidence: 93%

Section: Synthesis Of Hydrophobic Mof Materialsmentioning

confidence: 99%

Hydrophobic Metal–Organic Frameworks

et al. 2019

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“…Figure demonstrates that ZIF‐L mesh remains the excellent separation efficiency and simultaneously possesses higher flux compared with the oil/water separation performance of the previous literature reports . And the mesh substrate was used in all the compared study and this work.…”

Section: Resultsmentioning

confidence: 79%

“…reports. [53][54][55][56][57][58][59][60] And the mesh substrate was used in all the compared study and this work. It is worth noting that the coating based on hydrophobic MOF has better flux and separation performance than other coatings.…”

Section: Stability Performance Experimentsmentioning

confidence: 99%

Vertically zeolitic imidazolate framework‐L coated mesh with dagger‐like structure for oil/water separation

Zhang

Miao

et al. 2019

AIChE Journal

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The novel functional superwettable materials for high-efficiency oil/water separation are urgently required due to oil pollution in water body caused by oil tanker accidents, seabed oil production, and oil from refineries and petrochemical plants. Here, the superhydrophobic and superoleophilic zeolitic imidazolate framework-L (ZIF-L) mesh with antimicrobial effect was successfully fabricated by in-situ growth, composed of vertically ZIF-L with micro-/nanodagger-like structure and exhibited the water contact angle of 155.4 ± 1.8 and the oil contact angle of 0 in air. Furthermore, ZIF-L was verified to have an excellent antimicrobial activity, which endowed ZIF-L mesh with good antimicrobial performance. ZIF-L mesh provided a permeation flux with 1.75 × 10 5 L m −2 hr −1 and 99.7% separation efficiency after 10 cycles operations for water mixtures with isooctane and presented optimal stability. Accordingly, the results demonstrated that ZIF-L as a new material shows an attractive applied promise for oil/water separation in industry.

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“…Therefore, realizing how to rapidly separate oilwater mixtures efficiently is still a challenge. [14][15][16][17] Recently, superhydrophobic/ superoleophilic materials have gained special attention in oily wastewater purification driven by their unique surficial properties, which can allow oil to penetrate through but repel water out. [18][19][20][21][22][23] Hitherto, diverse methods have been developed to design superhydrophobic materials, according to models of wetting, [24][25][26][27] such as layer-by-layer method, [28,29] dip-coating route, [30][31][32] templates route, [33] spraycoating method, [34] and so on.…”

Section: Doi: 101002/mame202000160mentioning

confidence: 99%

One‐Pot Route for Fe@Poly(styrene‐co‐divinylbenzene) Foam with Robust Physical/Chemical Stability and Remote Magnetic Driven Capacity for Oil Removal

Zhang

et al. 2020

Macro Materials & Eng

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Magnetic and superhydrophobic materials with robust physical/chemical stability for controllable and remote magnetic driven capacity for oil removal under harsh environments are meaningful for oil–water separation but still a challenge. Herein, an alternative strategy to address this challenge is demonstrated by decorating poly(styrene‐co‐divinylbenzene) (PSDVB) on Fe foam via one‐pot solvothermal method. Different from previous magnetic and superhydrophobic materials, Fe foam is chosen to replace Fe3O4 nanomaterials. Thus, complicated preparation procedures and the high cost for Fe3O4 nanomaterials can be avoided. Additionally, PSDVB coating provides the whole foam with robust physical/chemical stabilities: i) the surface wettability can be maintained after 50 abrasion cycles or exposed in humid air (relative humidity: 90%) for 14 days, and ii) the surface wettability does not change under different pH solutions (3 < pH < 12) or highly salty solution (NaCl 10 wt%) for 6 h. Besides, outstanding separation efficiency (>99.9%), high durability (>70 times), and excellent oil flux (16 963–75 156 L m−2 h−1) can be realized under gravity. Most importantly, the foam continuously removes oil from confine place (on water surface or under water) under magnetic driven force.

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UiO-66-Coated Mesh Membrane with Underwater Superoleophobicity for High-Efficiency Oil–Water Separation

Cited by 129 publications

References 62 publications

Hydrophobic Metal–Organic Frameworks

Hydrophobic Metal–Organic Frameworks

Vertically zeolitic imidazolate framework‐L coated mesh with dagger‐like structure for oil/water separation

One‐Pot Route for Fe@Poly(styrene‐co‐divinylbenzene) Foam with Robust Physical/Chemical Stability and Remote Magnetic Driven Capacity for Oil Removal

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