Abstract
Visible-light-active π-conjugated polymer photocatalysts can effectively harness solar energy, thereby offering pragmatic solutions to eclectic environmental issues. In the present study, a series of ingenious visible-light-responsive, stable, and recyclable modified polyimide (SWO3/PI) photocatalysts was synthesized via a facile microwave-assisted rapid thermal polymerization strategy. The precursors employed were pyromellitic dianhydride, melamine, thiourea, and tungsten trioxide co-catalyst. The template-free inclusion of sulfur and tungsten oxide species into the PI conformation increased visible-light absorption and enhanced the separation efficiency of the photogenerated electron–hole pairs. The visible-light-induced reactive red 120 (RR 120) photodegradation efficiency exhibited by the SWO3/PI photocatalyst was over 98% and was approximately 2.3 times higher than that exhibited by pristine PI. Herein h+ and OH• were the principal active species involved in dye degradation. Interestingly, the sizabl...
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