Underwater oleophobic-super hydrophilic strontium-MOF for efficient oil/water separation

Raj, Arvind; Rego, Richelle M.; Ajeya, Kanalli V.; Jung, Ho‐Young; Altalhi, Tariq; Neelgund, Gururaj M.; Kigga, Madhuprasad; Kurkuri, Mahaveer D.

doi:10.1016/j.cej.2022.139757

Cited by 92 publications

(20 citation statements)

References 60 publications

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“…In addition, a MOF (HKUST-1)-coated stainless-steel mesh exhibited anti-crude-oil properties underwater because of its superhydrophilicity . Also, strontium MOF (Sr-MOF) showed excellent separation efficiency in an oil–water mixture . However, the hydrolytic instability of many types of MOFs, causes the metal network structure to collapse and the MOFs to lose their original structure and function when exposed to liquid water or high humidity, is a significant barrier to the widespread application of MOFs in oil–water separation.…”

Section: Introductionmentioning

confidence: 99%

“…25 Also, strontium MOF (Sr-MOF) showed excellent separation efficiency in an oil−water mixture. 26 However, the hydrolytic instability of many types of MOFs, causes the metal network structure to collapse and the MOFs to lose their original structure and function when exposed to liquid water or high humidity, is a significant barrier to the widespread application of MOFs in oil−water separation. Hence, it is crucial in the field of oil− water separation to investigate a new type of MOF with strong hydrophilicity and water stability.…”

Section: Introductionmentioning

confidence: 99%

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Deployment of Superhydrophilic and Super-antifouling Cr-soc-MOF-1-Based Membrane for Ultrafast Separation of Stabilized Oil-in-Water Emulsions

Obaid,

Alsadun,

Shekhah

et al. 2023

ACS Appl. Mater. Interfaces

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In spite of massive progress in oil−water separation, attributable to the use of advanced materials, the separation process faces challenges such as low permeance and fouling problems. Therefore, superwettable materials used in several fields are considered potential candidates for oily wastewater treatment. Metal−organic frameworks (MOFs) are receiving more and more interest in various separation applications due to their wide potential applications. Nevertheless, MOFs have been rarely explored for separating stabilized oil-in-water emulsions due to the difficulty in finding highly hydrolytic stable MOF candidates for this application. Furthermore, oil can clog water-stable materials owing to its high density, causing the degradation of MOF particles. As a result, there is a need to develop better MOF materials that can fulfill these requirements. Herein, we have explored Cr-soc-MOF-1 as a candidate for this application and deployed it as a membrane, which exhibited superhydrophilicity and underwater superoleophobicity for separating stabilized oil-in-water emulsions. The Cr-soc-MOF-1 membranes were synthesized by assembling the as-prepared MOF particles on a mixed cellulose ester substrate using a vacuum-assisted self-assembly technique. The Cr-soc-MOF-1 membrane exhibited ultrahigh water permeance (7465.9 L•m −2 •h −1 •bar −1 ), very high oil rejection (99.9%), and excellent anti-oil-fouling properties. The Cr-soc-MOF-1 membranes also exhibited excellent recyclability over 10 continuous separation cycles. Further, they exhibited an outstanding performance in separating various surfactant-stabilized oil-in-water emulsions. Thus, the Cr-soc-MOF-1 membranes exhibit a high potential in treating oily wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deployment of Superhydrophilic and Super-antifouling Cr-soc-MOF-1-Based Membrane for Ultrafast Separation of Stabilized Oil-in-Water Emulsions

Obaid,

Alsadun,

Shekhah

et al. 2023

ACS Appl. Mater. Interfaces

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“…13 Standard methods for the quantitative analysis of F − in water are time-consuming, expensive, and require offsite monitoring by skilled personnel, which can hinder routine monitoring. 14 In contrast, colorimetric sensors offer a rapid, convenient, costeffective, sensitive, and selective way of detecting F − ions in an aqueous medium. 15,16 These sensors work based on the interaction between the receptor and the anions, leading to changes in their structure and photophysical properties.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Mahishi,

Shet,

Mane

et al. 2023

Anal. Methods

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“…A large amount of oily wastewater not only endangers the water environment but also harms aquatic life, the surrounding land, and the atmosphere. There is also an impact on human society's economy and health 4–7 . As a result, both industrial production and academic research have focused on how to achieve efficient separation of oil and water.…”

Section: Introductionmentioning

confidence: 99%

“…There is also an impact on human society's economy and health. [4][5][6][7] As a result, both industrial production and academic research have focused on how to achieve efficient separation of oil and water.…”

Section: Introductionmentioning

confidence: 99%

Bionic multifunctional fibrous materials for efficient oil/water separation

Guo

Liu

2023

Droplet

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Special wettability fibrous materials have received a lot of attention because of their good connectivity, mechanical flexibility, large specific surface area, and ease of shape manipulation. Their outstanding performance paves the way toward efficient oil/water separation in a variety of environments and for separation requirements. This paper discusses the distinct advantages, challenges, and future research directions of various substrates for fibrous materials, such as nonwoven natural biomass fibers, fabrics, electrospinning fibers, metallic fibers, and inorganic nonmetallic fibers. The special wettability fibrous filter materials and fibrous adsorbents are summarized based on the different separation methods.The principles of preparation of various special wettabilities are introduced, and the unique advantages of fibrous adsorbents are emphasized. The preparation strategy of fibrous filter materials is discussed, as well as some representative work and research progress. The benefits, drawbacks, and research directions in terms of various materials are examined. This article emphasizes the pollution resistance of fibrous filter materials and the elasticity of fibrous adsorbents. Finally, the prospects in terms of the problems, challenges, and future development of special wettability fibrous materials used in oil/water separation are discussed.

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Underwater oleophobic-super hydrophilic strontium-MOF for efficient oil/water separation

Cited by 92 publications

References 60 publications

Deployment of Superhydrophilic and Super-antifouling Cr-soc-MOF-1-Based Membrane for Ultrafast Separation of Stabilized Oil-in-Water Emulsions

Deployment of Superhydrophilic and Super-antifouling Cr-soc-MOF-1-Based Membrane for Ultrafast Separation of Stabilized Oil-in-Water Emulsions

Ratiometric colorimetric detection of fluoride ions using a schiff base sensor: enhancing selectivity and sensitivity for naked-eye analysis

Bionic multifunctional fibrous materials for efficient oil/water separation

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