Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

This research was focused on the raw material level construction of bismuth oxybromide (BiOBr) catalysis-loaded 3D cross- TDI linked network polyurethane (PU) foam via the in situ polymerization method. After modification of superhydrophobic polydivinylbenzene nanoparticles, the PU foam possessed excellent superhydrophobic stability. The larger selective absorption oil phase capacity depended on its macroporous structure, and the existence of catalyst BiOBr (the band gap energy was about 2.57 eV) among the PU foam played a crucial role in degrading water-soluble contaminants under visible light irradiation. In this article, the photocatalytic experiment results verify that it has remarkable recycle degradation ability (the degradation efficiency can reach similar to 97%) and the capture experiments indicate that the uppermost active species is h(+).

Automated summary

This research focused on constructing a 3D cross-linked network polyurethane (PU) foam loaded with bismuth oxybromide (BiOBr) catalyst at the raw material level, demonstrating excellent superhydrophobic stability and high oil absorption capacity. The presence of BiOBr catalyst in the PU foam played a crucial role in degrading water-soluble contaminants under visible light irradiation, with remarkable high efficiency and recyclability in degradation.