A visible-light-driven self-powered photoelectrochemical(PEC)aptasensor was developed for ampicillin(AMP)detecting based on carbon dots(CDs)hybrid MIL-68(In)-derived In2O_(3)eIn_(2)S_(3) hollow tubular heterojunction(...A visible-light-driven self-powered photoelectrochemical(PEC)aptasensor was developed for ampicillin(AMP)detecting based on carbon dots(CDs)hybrid MIL-68(In)-derived In2O_(3)eIn_(2)S_(3) hollow tubular heterojunction(CDs/In2O_(3)eIn_(2)S_(3)).In_(2)S_(3) nanosheets uniformly grew in-situ on the surface of In2O_(3) hollow tubes,forming a close contact heterogeneous interface,which significantly promoted the transfer and separation of photo-generated carriers,and provided a large specific surface area and rich active sites for the PEC aptasensing platform.Furthermore,the CDs/In2O_(3)eIn_(2)S_(3)/ITO electrode,which was obtained by dipping assembly,showed remarkable and stable photoelectric signals at zero-bias under visible light irradiation.The amino-functionalized AMP aptamer was fixed on the working electrode as a biological recognition element,and the concentration of AMP was determined by observing the change in photocurrent intensity caused by the specific capture of AMP molecules in solution.Under optimized conditions,the developed PEC aptasensor displayed a relatively wide linear range from 0.001 ng mL^(-1) to 300 ng mL^(-1),as well as a low detection limit(LOD)of 0.06 pg mL^(-1).Besides,the novel self-powered PEC AMP-aptasensor exhibited excellent reproducibility,good stability and selectivity,which open a potential avenue for antibiotic residues detection in environmental media.展开更多
基金supported by the National Key Scientific Instrument and Equipment Development Project of China(No.21627809)National Natural Science Foundation of China(Nos.21505051,21575050,21607055,21777056)+1 种基金the Youth Creative Talents Introduction and Cultivation Plan in Universities of Shandong Province,Jinan Scientific Research Leader Workshop Project(2018GXRC024)Ju thanks the Special Foundation for Taishan Scholar Professorship of Shandong Province(No.ts201712052)and UJN.
文摘A visible-light-driven self-powered photoelectrochemical(PEC)aptasensor was developed for ampicillin(AMP)detecting based on carbon dots(CDs)hybrid MIL-68(In)-derived In2O_(3)eIn_(2)S_(3) hollow tubular heterojunction(CDs/In2O_(3)eIn_(2)S_(3)).In_(2)S_(3) nanosheets uniformly grew in-situ on the surface of In2O_(3) hollow tubes,forming a close contact heterogeneous interface,which significantly promoted the transfer and separation of photo-generated carriers,and provided a large specific surface area and rich active sites for the PEC aptasensing platform.Furthermore,the CDs/In2O_(3)eIn_(2)S_(3)/ITO electrode,which was obtained by dipping assembly,showed remarkable and stable photoelectric signals at zero-bias under visible light irradiation.The amino-functionalized AMP aptamer was fixed on the working electrode as a biological recognition element,and the concentration of AMP was determined by observing the change in photocurrent intensity caused by the specific capture of AMP molecules in solution.Under optimized conditions,the developed PEC aptasensor displayed a relatively wide linear range from 0.001 ng mL^(-1) to 300 ng mL^(-1),as well as a low detection limit(LOD)of 0.06 pg mL^(-1).Besides,the novel self-powered PEC AMP-aptasensor exhibited excellent reproducibility,good stability and selectivity,which open a potential avenue for antibiotic residues detection in environmental media.
