Aflatoxin B1(AFB1),a potent carcinogen widely prevalent in food commodities,necessitates reliable detection methods.In this study,we developed a novel dual-signal electrochemical aptasensor for AFB1 detection,employin...Aflatoxin B1(AFB1),a potent carcinogen widely prevalent in food commodities,necessitates reliable detection methods.In this study,we developed a novel dual-signal electrochemical aptasensor for AFB1 detection,employing PtCuNi/Apt/Thi and[Fe(CN)6]^(3/4-)as probes in conjunction with a synergistic signal amplification strategy.The hexagonal star-shaped PtCuNi nanomaterial,synthesized via a one-pot hydrothermal method,exhibits an enlarged specific surface area and abundant active sites,thereby enhancing both aptamer conjugation capacity and probe loading efficiency.The AFB1-triggered hybridization chain reaction(HCR)was employed as a signal amplification strategy.Under the combined effect of the three elements,the ternary alloy PtCuNi has better catalytic activity and higher stability compared to binary alloy PtCu and PtNi.The developed aptasensor demonstrated excellent detection performance,featuring a wide linear range from 5 pg/mL to 200 ng/mL with a low detection limit of 0.688 pg/mL.The aptasensor exhibited remarkable specificity,repeatability,and stability.Furthermore,the sensor exhibited excellent detection performance when analyzing real samples such as cornmeal and edible oil.For quality control samples including feed and edible oil,it demonstrated comparable capability to the HPLC method.The dual-signal system improved the detection accuracy and sensitivity by simultaneously measuring two distinct electrochemical signals,enabling mutual calibration and verification.展开更多
After publication of the research article "Constructing inter diffusive PtCuNi/WOg interface to enhance the catalytic activity and stability in oxygen reduction"(https://doi.org/10.1007/s42864-023-00226-0).T...After publication of the research article "Constructing inter diffusive PtCuNi/WOg interface to enhance the catalytic activity and stability in oxygen reduction"(https://doi.org/10.1007/s42864-023-00226-0).The authors discovered that the"Acknowledgement"is missing from the published online version,due to the unintentional mistake when preparing the manuscript.This could be unfair to the entities/scholars providing meaningful help to this work,as well as the funding agency that provided the financial support to this work.Therefore,an erratum is requested by the authors to acknowledge the following parties.展开更多
Platinum-group-metal-based alloy nanocrystals have been considered as the most effi cient catalysts for oxygen reduction reaction(ORR).However,the poor stability issues limit their further deployment in industrializat...Platinum-group-metal-based alloy nanocrystals have been considered as the most effi cient catalysts for oxygen reduction reaction(ORR).However,the poor stability issues limit their further deployment in industrialization.Tungsten oxide(WO_(3))has received attention due to its intrinsic electrochemical stability and proton absorption/desorption capability.In this work,we prepared PtCuNi/WO_(3)/C hybrid catalyst with inter-diff usive alloy/WO_(3)interface on carbon.The catalyst exhibits enhanced activity and stability associated with the WO_(3)content.The characterization results suggest that the increased activity originates from the complementary proton supply of non-stoichiometric H_(x)WO_(3).Moreover,WO_(3)prevents the particle from dissolution and detachment under vigorous electrochemical polarizations.The enhanced stability originates from the electronic interaction established between Pt and W.This work provides new strategies to design high-performance ORR catalysts by taking the merits of WO_(3)。展开更多
基金funded by the Key Scientific and Technological Project of Henan Province(242102320270)Special Project for Collaborative Innovation of Zhengzhou(21ZZXTCX15).
文摘Aflatoxin B1(AFB1),a potent carcinogen widely prevalent in food commodities,necessitates reliable detection methods.In this study,we developed a novel dual-signal electrochemical aptasensor for AFB1 detection,employing PtCuNi/Apt/Thi and[Fe(CN)6]^(3/4-)as probes in conjunction with a synergistic signal amplification strategy.The hexagonal star-shaped PtCuNi nanomaterial,synthesized via a one-pot hydrothermal method,exhibits an enlarged specific surface area and abundant active sites,thereby enhancing both aptamer conjugation capacity and probe loading efficiency.The AFB1-triggered hybridization chain reaction(HCR)was employed as a signal amplification strategy.Under the combined effect of the three elements,the ternary alloy PtCuNi has better catalytic activity and higher stability compared to binary alloy PtCu and PtNi.The developed aptasensor demonstrated excellent detection performance,featuring a wide linear range from 5 pg/mL to 200 ng/mL with a low detection limit of 0.688 pg/mL.The aptasensor exhibited remarkable specificity,repeatability,and stability.Furthermore,the sensor exhibited excellent detection performance when analyzing real samples such as cornmeal and edible oil.For quality control samples including feed and edible oil,it demonstrated comparable capability to the HPLC method.The dual-signal system improved the detection accuracy and sensitivity by simultaneously measuring two distinct electrochemical signals,enabling mutual calibration and verification.
文摘After publication of the research article "Constructing inter diffusive PtCuNi/WOg interface to enhance the catalytic activity and stability in oxygen reduction"(https://doi.org/10.1007/s42864-023-00226-0).The authors discovered that the"Acknowledgement"is missing from the published online version,due to the unintentional mistake when preparing the manuscript.This could be unfair to the entities/scholars providing meaningful help to this work,as well as the funding agency that provided the financial support to this work.Therefore,an erratum is requested by the authors to acknowledge the following parties.
文摘Platinum-group-metal-based alloy nanocrystals have been considered as the most effi cient catalysts for oxygen reduction reaction(ORR).However,the poor stability issues limit their further deployment in industrialization.Tungsten oxide(WO_(3))has received attention due to its intrinsic electrochemical stability and proton absorption/desorption capability.In this work,we prepared PtCuNi/WO_(3)/C hybrid catalyst with inter-diff usive alloy/WO_(3)interface on carbon.The catalyst exhibits enhanced activity and stability associated with the WO_(3)content.The characterization results suggest that the increased activity originates from the complementary proton supply of non-stoichiometric H_(x)WO_(3).Moreover,WO_(3)prevents the particle from dissolution and detachment under vigorous electrochemical polarizations.The enhanced stability originates from the electronic interaction established between Pt and W.This work provides new strategies to design high-performance ORR catalysts by taking the merits of WO_(3)。
