1. Zn-MOFs composites loaded with silver nanoparticles are used for fluorescence sensing pesticides, Trp, EDA and photocatalytic degradation of organic dyes.
- Author
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Liu, Lu, Chen, Xiao-Li, Cai, Miao, Yan, Rui-Kui, Cui, Hua-Li, Yang, Hua, and Wang, Ji-Jiang
- Subjects
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SILVER nanoparticles , *PHOTODEGRADATION , *ORGANIC dyes , *FLUORESCENCE , *EMAMECTIN benzoate , *PESTICIDES , *SILVER - Abstract
A Zn-MOF modified by silver nanoparticles (Ag@1) was synthesized by deposition reduction method. Ag@1 can serve as multi-response fluorescence sensor to detect pesticides, Trp and EDA, showing excellent sensitivity and selectivity. In particular, Ag@1 showed "turn-off" fluorescence sensing for FLU and EDA, and "turn-on" fluorescence sensing for EMB and Trp. It is also effective in detecting pesticides in simulated water and amino acids in fresh fetal bovine serum. In addition, due to its good photocatalytic activity, it can effectively degrade MB. [Display omitted] • Ag@1 was synthesized by deposition of silver nanoparticles on Zn-MOF surface. • Ag@1 showed "turn-off" fluorescence sensing for FLU and EDA. • Ag@1 showed "turn-on" fluorescence sensing for EMB and Trp. • It can effectively detect pesticides in water samples and Trp in fetal bovine serum. • Ag@1 can be used as a photocatalyst to effectively degrade the MB in water. The abuse of pesticides, antibiotics, organic solvents, etc., not only deteriorates the ecological environment, but even affects the normal development of organisms, posing a serious threat to global public health. Efficient and sensitive detection of pesticides, antibiotics, organic solvents and so on are very important, but also a challenge to scientists. By depositing Ag nanoparticles on the surface of Zn-MOF (1 : {[Zn 2 (bta)(bpy)(H 2 O) 2 ]·2H 2 O} n), a new type of composite material (Ag@ 1) was successfully synthesized and analyzed by TEM, EDS, XPS, XRD, IR and other characterization methods. Ag@ 1 can serve as multi-response fluorescence sensor to detect pesticides (fluazinam (FLU) and emamectin benzoate (EMB)), Tryptophan (Trp) and Ethylenediamine (EDA). In particular, Ag@1 showed "turn-off" fluorescence sensing for FLU and EDA, and "turn-on" fluorescence sensing for EMB and Trp. It is worth mentioning that we further explored its analysis of FLU and Trp in real water samples and fetal bovine serum. The recoveries are satisfactory, 97.95 % − 102.39 % and 96.69 % − 101.85 %, respectively. In addition, the photocatalytic performance of Ag@ 1 was found to be excellent, the degradation rate of methylene blue (MB) reached 86 %, and its degradation mechanism was discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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