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- W4310790832 abstract "Pluronic block copolymers have been most widely used as templates for porous TiO2 photocatalytic structures, but small pores are formed, reducing water permeability. Herein, a comb copolymer, poly(glycidyl methacrylate)-co-poly(oxyethylene methacrylate) (PGMA-co-POEM; simply PGPO), was synthesized through free-radical polymerization and used as a template for hierarchically porous TiO2 (hp-TiO2) nanoislands on porous Al2O3 membranes via a sol–gel, spin-coating process. The PGPO comb copolymer exhibited self-assembled, microphase-separated morphology, leading to a mesoporous TiO2 architecture with superior interconnectivity. In situ epoxy-hydroxyl crosslinking and selective coordination of the TiO2 precursor to the hydrophilic chains of the PGPO copolymer resulted in the development of hp-TiO2 nanoislands. The layer-by-layer morphology ensured excellent photocatalytic ability for the degradation of contaminants associated with organic dye compounds upon UV irradiation (removal efficiency >90%). Organic fouling due to the dye compounds was further significantly reduced with the hp-TiO2 membrane (flux decline ∼10%) as compared to the case of a porous TiO2 (p-TiO2) membrane (removal efficiency ∼50%; flux decline ∼30%). Furthermore, the water permeability of hp-TiO2 nanoisland membranes was greater than those of membranes prepared using Pluronic P123, which is attributed to the self-assembly, microphase-separated structure and high molecular weight of the PGPO comb copolymer." @default.
- W4310790832 created "2022-12-17" @default.
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- W4310790832 date "2022-12-01" @default.
- W4310790832 modified "2023-10-10" @default.
- W4310790832 title "Comb Copolymer Templates for Interconnected, Hierarchically Porous TiO<sub>2</sub> Nanoisland Photocatalytic Membranes" @default.
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- W4310790832 doi "https://doi.org/10.1021/acsapm.2c01489" @default.
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