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Article Abstract
Photocatalytic technology provides a sustainable development strategy for the synchronous removal of azo dyes and mordant leaching of Cr(VI). To mitigate the shielding effect of free carriers on the built-in electric field during the photocatalytic process, a double S-scheme piezo-photocatalyst BiWO/BiOCl/BiS (BW-C-S) with full spectral response that can continuously respond to the ultrasound-guided polarized electric field to adjust the built-in electric field to promote the separation and migration of photogenerated carriers was developed. BW-C-S effectively overcame the barriers of carrier separation and migration by utilizing an ultrasonic-optical coupling field, achieving the rapid synchronous removal of reactive brilliant red X-3B (RBR X-3B) (0.057 min) and Cr(VI) (0.063 min). The synergistic reaction mechanism, potential degradation pathways, and the ecological toxicity of intermediates associated with the RBR X-3B/Cr(VI) synchronous removal process and the RBR X-3B independent degradation process were further elucidated through LC-MS analysis, DFT calculations, and toxicity evaluations. The continuous removal efficiency of pollutants by BW-C-S under dynamic hydraulic conditions was validated through the construction of a continuous flow reaction device, which provided theoretical support for the sustainable purification of various pollutants in complex aquatic environments.
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| http://dx.doi.org/10.1016/j.watres.2025.124332 | DOI Listing |
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