The industrial implementation of Solar-driven photocatalysis is hampered by inefficient charge separation,poor reusability and hard retrieval of powdery catalysts.To conquer these drawbacks,a self-floating S-scheme Bi...The industrial implementation of Solar-driven photocatalysis is hampered by inefficient charge separation,poor reusability and hard retrieval of powdery catalysts.To conquer these drawbacks,a self-floating S-scheme Bi_(4)O_(5)Br_(2)/P-doped C_(3)N_(4)/carbon fiber cloth(BB/PN/CC)composed of carbon fibers(CC)as the core and Bi_(4)O_(5)Br_(2)/P-doped C_(3)N_(4)(BB/PN)nanosheets as the shell was constructed as a competent,recyclable cloth-shaped photocatalyst for safe and efficient degradation of aquacultural antibiotics.The BB/PN/CC fabric achieves an exceptional tetracycline degradation rate constant of 0.0118 min‒1,surpassing CN/CC(0.0015 min^(‒1)),BB/CC(0.0066 min^(‒1))and PN/CC(0.0023 min^(‒1))by 6.9,0.8 and 4.1 folds,respectively.Beyond its catalytic prowess,the photocatalyst’s practical superiority is evident in its effortless recovery and environmental adaptability.The superior catalytic effectiveness stems from the S-scheme configuration,which retains the maximum redox capacities of the constituent BB and PN while enabling efficient spatial detachment of photo-carriers.X-ray photoelectron spectroscopy(XPS),in-situ XPS,and electron paramagnetic resonance analyses corroborate the S-scheme mechanism,revealing electron accumulation on PN and hole retention on BB under illumination.Density functional theory calculations further confirm S-scheme interfacial charge redistribution and internal electric field formation.This study advances the design of macroscopic S-scheme heterojunction photocatalysts for sustainable water purification.展开更多
文摘The industrial implementation of Solar-driven photocatalysis is hampered by inefficient charge separation,poor reusability and hard retrieval of powdery catalysts.To conquer these drawbacks,a self-floating S-scheme Bi_(4)O_(5)Br_(2)/P-doped C_(3)N_(4)/carbon fiber cloth(BB/PN/CC)composed of carbon fibers(CC)as the core and Bi_(4)O_(5)Br_(2)/P-doped C_(3)N_(4)(BB/PN)nanosheets as the shell was constructed as a competent,recyclable cloth-shaped photocatalyst for safe and efficient degradation of aquacultural antibiotics.The BB/PN/CC fabric achieves an exceptional tetracycline degradation rate constant of 0.0118 min‒1,surpassing CN/CC(0.0015 min^(‒1)),BB/CC(0.0066 min^(‒1))and PN/CC(0.0023 min^(‒1))by 6.9,0.8 and 4.1 folds,respectively.Beyond its catalytic prowess,the photocatalyst’s practical superiority is evident in its effortless recovery and environmental adaptability.The superior catalytic effectiveness stems from the S-scheme configuration,which retains the maximum redox capacities of the constituent BB and PN while enabling efficient spatial detachment of photo-carriers.X-ray photoelectron spectroscopy(XPS),in-situ XPS,and electron paramagnetic resonance analyses corroborate the S-scheme mechanism,revealing electron accumulation on PN and hole retention on BB under illumination.Density functional theory calculations further confirm S-scheme interfacial charge redistribution and internal electric field formation.This study advances the design of macroscopic S-scheme heterojunction photocatalysts for sustainable water purification.
