Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported mat...Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported materials usually possess single function,which considerably limits their applications as sensors or captures.Herein,two fluorescent composites,ZIF-8@Au Ag NPs and ZIF-8-Au Ag NPs,are prepared by the integration of Au/Ag nanoparticles(M NPs)and a zeolite imidazolate framework(ZIF-8),presenting a more stable fluorescent performance compared with pure Au Ag NPs.The characterizations unravel that ZIF-8@Au Ag NPs exhibits a core shell type structure,whereas ZIF-8-Au Ag NPs are indicative of a dispersed loading type motif.ZIF-8-Au Ag NPs features a significant fluorescent quenching effect for three commonly used dinitroaniline pesticides in aqueous matrices.Then,pendimethalin(PDA)is selected as a representative of dinitroaniline pesticides to thoroughly develop the potential applications in the fields of detection and extraction.Impressively,ZIF-8-Au Ag NPs made of ZIF-8 shell embedded with Au Ag NPs can achieve fluorescence sensing for PDA in a low concentration range with the limit of detection(LOD)of 4.2 nmol/L from aqueous solution and agricultural products,attributed to the combination of competition mechanism and electron transfer.Moreover,ZIF-8-Au Ag NPs possesses high adsorption capacity of125 mg/g for PDA at p H 6,depending on the synergistic effect of unique structural frameworks,coordinative interaction and hydrogen bond.The design for present hybrid composites provides a facile strategy to develop difunctional luminescent adsorbents with the merits of selective detection and effective absorption of dinitroaniline pesticides.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,Nos.21863009 and 22063008)the Natural Science Foundation of Ningxia(Nos.2023AAC03014,2023AAC03227 and 2022AAC05002)+2 种基金the Young Top-notch Talent Cultivation Program of Ningxiathe Discipline Project of Ningxia(No.NXYLXK2017A04)the China Postdoctoral Science Foundation(No.2022M723148)。
文摘Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported materials usually possess single function,which considerably limits their applications as sensors or captures.Herein,two fluorescent composites,ZIF-8@Au Ag NPs and ZIF-8-Au Ag NPs,are prepared by the integration of Au/Ag nanoparticles(M NPs)and a zeolite imidazolate framework(ZIF-8),presenting a more stable fluorescent performance compared with pure Au Ag NPs.The characterizations unravel that ZIF-8@Au Ag NPs exhibits a core shell type structure,whereas ZIF-8-Au Ag NPs are indicative of a dispersed loading type motif.ZIF-8-Au Ag NPs features a significant fluorescent quenching effect for three commonly used dinitroaniline pesticides in aqueous matrices.Then,pendimethalin(PDA)is selected as a representative of dinitroaniline pesticides to thoroughly develop the potential applications in the fields of detection and extraction.Impressively,ZIF-8-Au Ag NPs made of ZIF-8 shell embedded with Au Ag NPs can achieve fluorescence sensing for PDA in a low concentration range with the limit of detection(LOD)of 4.2 nmol/L from aqueous solution and agricultural products,attributed to the combination of competition mechanism and electron transfer.Moreover,ZIF-8-Au Ag NPs possesses high adsorption capacity of125 mg/g for PDA at p H 6,depending on the synergistic effect of unique structural frameworks,coordinative interaction and hydrogen bond.The design for present hybrid composites provides a facile strategy to develop difunctional luminescent adsorbents with the merits of selective detection and effective absorption of dinitroaniline pesticides.
