Engineering N-doped fullerene C60-decorated Bi2S3 nanorods with boosted piezo-photocatalytic behavior
摘要
Herein, nitrogen-doped fullerene C60-modified Bi2S3 nanorods (NC60/Bi2S3) hybrid catalysts were assembled via hydrothermal technique. The piezo-photocatalytic degradation efficiencies of synthesized xwt%-NC60/Bi2S3 (x = 0.5 to 3) were explored toward lomefloxacin (LFX). Under visible-lighting/ultrasonication, the 1.5wt%-NC60/Bi2S3 sample possesses higher piezo-photocatalytic degradation performance, where the apparent LFX degradation rate reached 0.078 min−1 (97.6% degradation efficiency after 50 min), compared to 0.02 min−1 and 0.065 min−1 for piezocatalytic and photocatalytic, respectively, achieving a synergy percent of 67%. The boosted degradation activity and high stability of the developed NC60/Bi2S3 hybrid were attributed to the accelerated transfer of photogenerated electrons by NC60 as well as the induced piezoelectric effects by Bi2S3 nanorods. The separation pathway of photocharge carriers was investigated through trapping processes, which showed that mainly •O2− and secondarily h+ were the most contributing degradation species.
Graphical Abstract