Emerging trends in membrane-based wastewater treatment: electrospun nanofibers and reticular porous adsorbents as key components

Kumar, Manish; Chowdhury, Sumanta; Randhawa, Jaspreet Kaur

doi:10.1039/d3ew00119a

Environ. Sci.: Water Res. Technol.

2024

DOI: 10.1039/d3ew00119a

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Emerging trends in membrane-based wastewater treatment: electrospun nanofibers and reticular porous adsorbents as key components

Manish Kumar,

Sumanta Chowdhury,

Jaspreet Kaur Randhawa

Abstract: Exploring material trends with reticular porous materials (MOFs, COFs) and electrospun nanofibers in hybrid membrane design for wastewater remediation.

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Cited by 3 publications

References 357 publications

(438 reference statements)

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Electrospun Nanofiber Supported Nano/Mesoscale Covalent Organic Frameworks Boost Iodine Sorption

Chowdhury,

Hasnat,

Rathi

et al. 2024

Small

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Covalent Organic Frameworks (COFs) are benchmark materials for iodine sorption, but their use has largely been confined to crystalline bulk forms. In this state, COFs face diffusion limitations leading to slow sorption kinetics. To address this, a series of [2 + 3] imine‐linked COFs with varying particle sizes and morphologies (mesospheres, nanoflowers, and bulk) is synthesized. Reducing particle size (from 826 ± 48 to 412 ± 22 nm) and adding surface protrusions in COF mesospheres improved iodine adsorption capacity (7.6 to 8.5 g g⁻¹), kinetics (K80%, 0.61 to 0.76 g g⁻¹ h⁻¹), and chemisorption efficiency. Notably, solvothermally synthesized (120 °C, 5 d) crystalline bulk COF with accessible porous surfaces exhibited faster kinetics (K80%, 1.13 g g⁻¹ h⁻¹) than nano/mesoCOFs.This implies nano‐ and mesoCOFs exhibit surface aggregation that passivates their external binding sites and hinders iodine diffusion and mass transfer. To prevent this, morphologically controlled COF particles are immobilized onto electrospun polyacrylonitrile nanofibrous membranes via in situ growth strategy, creating a hierarchical structure that improved iodine diffusion pathways. This modification increased iodine sorption kinetics by 98%–153% and strengthened the charge‐transfer process compared to COF powders.

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Electrospun Nanofiber Supported Nano/Mesoscale Covalent Organic Frameworks Boost Iodine Sorption

Chowdhury,

Hasnat,

Rathi

et al. 2024

Small

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Global research landscape on coagulation-flocculation for wastewater treatment: A 2000–2023 bibliometric analysis

Mohamed Noor,

Ngadi

2024

Journal of Water Process Engineering

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Exploring electrospun Nafion nanofibers: Bibliographic insights, emerging possibilities, and diverse applications

Avvari,

Sreekanth,

Shanmugam

et al. 2024

AIP Advances

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Over the past several decades, there has been a significant surge in interest regarding the use of organic–inorganic hybrid polymers and nanocomposite membranes. The reasons for this are improved attributes, reduced costs, and the additional stability the influence membrane provides. This Review outlines the various techniques and methodologies used to prepare Nafion and its composites, delineating the promising benefits of the electrospinning process. Electrospinning has emerged as a versatile and promising technique for fabricating nanofibers with unique properties and wide-ranging applications. This study explores the electrospinning of Nafion, a perfluorosulfonic acid polymer widely known for its exceptional proton conductivity and chemical stability, into nanofibrous structures, unlocking new possibilities yet unknown features of its inherent properties. The morphology and chemical structure of the resulting nanofibers is analyzed. A thorough bibliographic analysis of electrospun Nafion was presented using the PRISMA approach for methodically presenting the report. Network visualization of connected authors and categorizing application-specific publications are also discussed. Moreover, the electrospinning parameters and blends are systematically investigated to optimize the production of Nafion nanofibers for various applications in fuel cells, water treatment, actuators, sensors, and energy harvesting. The challenges involved in electrospinning Nafion, Nafion nanocomposites, and their variants are also presented, with a discussion delineating the future scope. This work concludes by emphasizing the interdisciplinary character of the Nafion polymer and its composites, connecting materials science and the intricate issues presented by various sectors.

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Emerging trends in membrane-based wastewater treatment: electrospun nanofibers and reticular porous adsorbents as key components

Abstract: Exploring material trends with reticular porous materials (MOFs, COFs) and electrospun nanofibers in hybrid membrane design for wastewater remediation.

Cited by 3 publications

References 357 publications

Electrospun Nanofiber Supported Nano/Mesoscale Covalent Organic Frameworks Boost Iodine Sorption

Electrospun Nanofiber Supported Nano/Mesoscale Covalent Organic Frameworks Boost Iodine Sorption

Global research landscape on coagulation-flocculation for wastewater treatment: A 2000–2023 bibliometric analysis

Exploring electrospun Nafion nanofibers: Bibliographic insights, emerging possibilities, and diverse applications

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