Work

Fabrication of α-MnO 2 /GO/PVDF Catalytic Membranes via a Phase Inversion Method for Universal Separation and Degradation of Dye Wastewater

Year: 2026

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide In this study, a manganese dioxide/graphene oxide/poly(vinylidene fluoride) catalytic membrane (α-MnO 2 /GO/PVDF) was fabricated via a solution phase inversion method for efficient dye wastewater treatment. The membrane integrated α-MnO 2 nanowires as heterogeneous Fenton-like catalysts and GO to enhance its own separation and catalytic properties. Characterizations revealed that the introduction of GO and α-MnO 2 optimized the membrane’s surface roughness, hydrophilicity, pore structure, and mechanical properties. The optimized membrane (M-4) exhibited exceptional universal separation performance, achieving rejection rates exceeding 96% for both anionic dyes (Congo red, methyl blue) and cationic dyes (rhodamine B (Rh B), methylene blue), overcoming the target-specific limitation of previous membranes. The synergistic effect of physical interception and the heterogeneous Fenton-like reaction, driven by H 2 O 2, generated HO • and HOO • radicals for dye degradation. The membrane also showed excellent operational stability, maintaining a rejection rate of 91.59% after five cycles. This work provided a novel strategy for constructing versatile catalytic membranes, highlighting their potential as a sustainable solution for efficient and universal dye wastewater treatment.

Source: ACS Omega

DOI: 10.1021/acsomega.5c12589

Authors: Runze He, Xinyu Hou, Fei Wang, Xiao Liu

Institution: North Minzu University

Language: English

Topic: Membrane Separation Technologies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $1,935