Green Fabrication of Synergistic Adsorption‐Photocatalysis Nanofiber Composite Membranes for Enhanced Dye Removal

Why It Matters

The technology offers a low‑impact, high‑efficiency solution for dye‑laden effluents, addressing regulatory pressure and sustainability goals in water‑intensive industries.

Key Takeaways

• Green three-step fabrication avoids toxic solvents.
• Membrane combines adsorption and visible-light photocatalysis.
• Achieves 96% methylene blue, 93% Congo red removal.
• Retains >70% efficiency after five reuse cycles.
• Hierarchical pores enhance charge transfer and active sites.

Pulse Analysis

Industrial dye discharge remains a stubborn pollutant, challenging regulators and plant operators alike. Traditional treatment options—such as activated sludge, membrane filtration, or high‑temperature calcination—often consume significant energy and generate secondary waste streams. In this context, a green, three‑stage fabrication route that sidesteps hazardous solvents marks a pivotal shift toward truly sustainable water remediation. By leveraging blend electrospinning, biomimetic polymerization, and room‑temperature growth of layered double hydroxides, the researchers create a nanofiber scaffold that is both scalable and environmentally benign.

The engineered EPA/AC/PDA/LDH membrane capitalizes on a synergistic blend of materials. Activated carbon supplies abundant adsorption sites, while polydopamine facilitates visible‑light absorption and efficient charge separation. Layered double hydroxides contribute photocatalytic activity, generating reactive radicals that degrade captured dyes. This hierarchical architecture yields impressive removal efficiencies—over 96% for methylene blue and 93% for Congo red—and maintains more than 70% performance after five reuse cycles, underscoring its durability and cost‑effectiveness for continuous operation.

Beyond laboratory metrics, the membrane’s green manufacturing and recyclability align with emerging circular‑economy mandates across textiles, pharmaceuticals, and petrochemicals. Its solvent‑free process reduces operational hazards and lowers capital expenditures, making retrofitting of existing treatment plants feasible. As industries grapple with stricter discharge limits, such multifunctional nanofiber composites could become a cornerstone of next‑generation wastewater infrastructure, driving both regulatory compliance and sustainability reporting forward.