Elevating oil-in-water emulsion separation: Unleashing the power of exfoliated graphitic carbon nitride composite membranes

Document Type

Article

Publication Title

Chemical Engineering Journal Advances

Abstract

The current study describes composite membranes that utilise exfoliated graphitic carbon nitride (Eg-C3N4) as a promising membrane additive for oily-water separation, owing to its hydrophilic nature and high functionality. The integrated membranes have been discovered to have outstanding properties when Eg-C3N4 is used as a composite material in polysulphone (PSf) membranes. The study provides provide insights into the usage of such nanosheets to achieve good chemical interaction with the membrane matrix, enabling both Eg-C3N4 and PSf synergistic characteristics. The well-planned exfoliated g-C3N4-PSf composite demonstrated promising oil-water separation with an oil rejection capacity of >99 %. Furthermore, these exfoliated laminar planes interacted well with the polymer, resulting in membranes that were both thermally and mechanically stable. The membrane also has a high porosity range of 46.13 % to 76.03 % and a high-water uptake range of 42.23 + 1.68 % to 71.34 + 1.24 %, which explains the membrane's enhanced hydrophilicity and appropriate oily-water treatment capacity. Furthermore, the addition of Eg-C3N4 lowers surface roughness, which explains for the great antifouling capacity exhibited by the composite membrane, demonstrating a remarkable flux recovery ratio of about 99.1 % with no compromise in oil rejection during subsequent cycles.

DOI

10.1016/j.ceja.2023.100580

Publication Date

3-15-2024

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