Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and fie...Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and field-deployable analytical tools for environmental monitoring.Herein,we developed a plasmon-enhanced CdIn_(2)S_(4)/Bi_(2)WO_(6)Z-scheme heterojunction to construct a photoelectrochemical(PEC)aptasensor for BPS detection.The Z-scheme configuration between CdIn_(2)S_(4)and Bi_(2)WO_(6)significantly enhances the PEC response by suppressing recombination of photogenerated electronhole pairs.Further integration with gold nanoparticles(AuNPs)amplifies the photocurrent through the surface plasmon resonance(SPR)effect,yielding a highly efficient PEC sensing platform.A BPS-specific aptamer was immobilized on the electrode to enable selective target capture.The resulting aptamer-target complex,upon exposure to BPS,impedes interfacial electron transfer,resulting in a concentration-dependent decrease in the photocurrent.The PEC aptasensor exhibited a wide linear detection range of 5 nM to 50μM and a detection limit of 0.64 nM.The sensor demonstrated high selectivity against structurally similar interfering substances.Application to real water samples yielded results consistent with that of HPLC-MS/MS,confirming the sensor's reliability and practical applicability.This work establishes a sensitive,rapid,and robust PEC strategy for monitoring BPS in complex environmental matrices with potential for routine environmental analysis.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.22276088,22576093)the Shenzhen Science and Technology Program(KCXFZ20230731093601003,KQTD20240729102048052,20231116144111001)the High Level of Special Funds(G03034K006)。
文摘Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and field-deployable analytical tools for environmental monitoring.Herein,we developed a plasmon-enhanced CdIn_(2)S_(4)/Bi_(2)WO_(6)Z-scheme heterojunction to construct a photoelectrochemical(PEC)aptasensor for BPS detection.The Z-scheme configuration between CdIn_(2)S_(4)and Bi_(2)WO_(6)significantly enhances the PEC response by suppressing recombination of photogenerated electronhole pairs.Further integration with gold nanoparticles(AuNPs)amplifies the photocurrent through the surface plasmon resonance(SPR)effect,yielding a highly efficient PEC sensing platform.A BPS-specific aptamer was immobilized on the electrode to enable selective target capture.The resulting aptamer-target complex,upon exposure to BPS,impedes interfacial electron transfer,resulting in a concentration-dependent decrease in the photocurrent.The PEC aptasensor exhibited a wide linear detection range of 5 nM to 50μM and a detection limit of 0.64 nM.The sensor demonstrated high selectivity against structurally similar interfering substances.Application to real water samples yielded results consistent with that of HPLC-MS/MS,confirming the sensor's reliability and practical applicability.This work establishes a sensitive,rapid,and robust PEC strategy for monitoring BPS in complex environmental matrices with potential for routine environmental analysis.
