Silver nanoparticles-based colorimetric array for the detection of Thiophanate-methyl

Zheng, Mingda; Wang, Yingying; Wang, Chenge; Wei, Wei; Ma, Shuang; Sun, Xiaohan; He, Jiang

doi:10.1016/j.saa.2018.03.038

Cited by 25 publications

(9 citation statements)

References 36 publications

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“…By introducing transition metal modification, the electronic structure and optical properties of CDs can be adjusted, which greatly expands the application of CDs in catalysis, electricity conduction and so on [ 22 , 23 , 24 ]. Although transition metals with modified CDs show fluorescent stability, such as cadmium (Cd), tellurium (Te), silver (Ag), selenium (Se) and cobalt (Co), they have low biological compatibility that has limited their application [ 25 ]. Additionally, the preparation of these materials is toxic and incurs an expensive cost to a great extent, which restricts their application in the fields of biology, medicine and so on [ 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Yue

Zhu

et al. 2022

Foods

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The detection of food safety and quality is very significant throughout the food supply. Stable dual-emission copper-modified fluorescent carbon dots (Cu-CDs) were successfully synthesized by a simple and environment-friendly hydrothermal, which was used for the real-time detection of pesticide residues in agricultural products. By optimizing the reaction conditions, Cu-CDs showed two emission peaks, with the highest fluorescence intensities at 375 and 450 nm. The structure, chemical composition and optical properties of Cu-CDs were investigated by XRD, TEM and IR. The results showed that thiophanate methyl (TM) could induce fluorescence quenching of Cu-CDs with no other ligands by the electron transfer through π-π stacking. The synchronous response of the dual-emission sensor enhanced the specificity of TM, which showed remarkable anti-interference capability. The fluorescence quenching degree of Cu-CDs had a good linear relationship with the TM concentration; the low detection limit for a pear was 0.75 μM, and for an apple, 0.78 μM. The recoveries in the fruit samples were 79.70–91.15% and 81.20–93.55%, respectively, and the relative standard deviations (RSDs) were less than 4.23% for the pear and less than 3.78% for the apple. Thus, our results indicate the feasibility and reliability of our methods in detecting pesticide residues in agricultural products.

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Section: Introductionmentioning

confidence: 99%

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Yue

Zhu

et al. 2022

Foods

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“…Consequently, the crystalline purity of Zn1 and Zn2 was illustrated by utilizing powder X-ray diffraction (PXRD) patterns. Then fresh samples were immersed in deionized water for one week or in different pH surroundings (1,2,3,4,10,11,12,13) for 24 hours for measuring the acid-base stability of Zn2. The PXRD patterns of Zn2 showed similar peaks under a wide range of pH values, which exactly matched with the pristine sample.…”

Section: Stability and Fluorescence Propertiesmentioning

confidence: 99%

Smart MOF‐on‐MOF Hydrogel as a Simple Rod‐shaped Core for Visual Detection and Effective Removal of Pesticides

Jia

Fan

Zhang

et al. 2022

Small

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or entering into the plant body through the systemic action were transformed into carbendazim (CBZ), inhibiting the germination of spores, hindering cell division, and achieving a good therapeutic effect by interfering with the formation of pathogenic mycelium. [7][8][9][10] The Office of Environmental Health Hazard Assessment announces long-term exposure to residual TM or transformed CBZ may bring abnormal pathological phenomena due to their reproductive toxicity and carcinogenic potential. [11][12][13] Many advanced techniques have also been developed for real-time monitoring pesticides. Electrochemical detection of parathion-ethyl demonstrated an ultralow limit of detection (0.004 × 10 −6 m), a wide linear range (0.02-43 × 10 −6 m), high reproducibility, and good suitability in aquatic samples. [14] The photothermal spectrum was proposed to quantitatively and real-time online determine the concentration of chlorpyrifos with excellent sensitivity (1.8 pm/ ppm). [15] More importantly, fluorescence detection enabled rapidly in situ imaging for nondestructive detection of organophosphorus pesticide residues in fresh agricultural products, [16] exhibiting considerable feasibility for non-invasive, visual detection, and rapid analysis of TM on food. Besides, some researchers paid close attention to the removal of derived CBZ in recent years as pesticide residues greatly magnify the potential risks in food safety. Laurella et al. [17] and Wang et al. [18] have successfully presented the adsorption capacity of CBZ on silica and FeCl 3 -modified corn straw biochar. Even both the fluorescence detection of TM and removal of CBZ have been reported, it is still essential to develop efficient, friendly, and smart materials for detecting and removing simultaneously.Metal-organic frameworks (MOFs) were one kind of advanced multifunctional materials formed by self-assembly of functionalized organic ligands and metal ions/clusters, which have been smoothly used in diverse fields including sensing, adsorption, drug delivery, gas storage, heterogeneous catalysis, etc. [19][20][21][22] Especially, Zn(II)-based MOFs (Zn-MOFs) have been proved to be promising fluorescent probes and sorbents for pesticides in the environmental analysis, due to low toxicity, tailored crystal structures, tunable porosity, and remarkableThe immoderate use of pesticides in the modern agricultural industry has led to the pollution of water resources and ultimately threatens the human body. Herein, two metal-organic frameworks (MOFs), namely {[Zn(tpt) 2 •2H 2 O]} n (Zn1) and {[Zn 2 (tpt) 2 (bdc)]} n (Zn2), (Htpt = 5-[4(1H-1,2,4-triazol-1-yl)]phenyl-2H-tetrazole), respectively, are constructed as smart materials for visual and on-site detection of pesticides and their removal from water. The exposed nitrogen-rich sites and high chemical stability make Zn2 a self-assembly core to further fabricate MOF-on-MOF-sodium alginate (ZIF-8-on-Zn2@SA) composite by wrapping ZIF-8 on the outside surface. Inheriting the excellent fluorescent emission of Zn2, the rod-like...

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“…Furthermore, the sensor did not react with several interferents and mixtures thereof (including cations, anions and other pesticides). In other examples, hydrogen bonding between citrate-stabilised AgNPs and thiophanate-methyl was exploited ( 120 ), as well as the non-covalent interaction between borohydride-stabilised AgNPs and diazinon pesticide ( 121 ). In addition to these non-covalent interactions, pesticides were detected with biosensors using biological recognition elements (aptamers and enzymes), which ensures high selectivity and, as demonstrated, superior LODs.…”

Section: Optical Sensorsmentioning

confidence: 99%

Recent Advances in (Bio)Chemical Sensors for Food Safety and Quality Based on Silver Nanomaterials

Ivanišević

Milardović

Kassal

2021

Food Technol. Biotechnol. (Online)

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There is a continuing need for tools and devices which can simplify, quicken and reduce the cost of analyses of food safety and quality. Chemical sensors and biosensors are increasingly being developed for this purpose, reaping from the opportunities provided by nanotechnology. Due to the distinct electrical and optical properties of silver nanoparticles (AgNPs), this material plays a vital role in (bio)sensor development. This review is an analysis of chemical sensors and biosensors based on silver nanoparticles with application in food and beverage matrices. It consists of academic research published from 2015 to 2020. The paper is structured to separately explore the designs of two major (bio)sensor classes: electrochemical (including voltammetric and impedimetric sensors) and optical sensors (including colorimetric and luminescent), with special focus on the type of silver nanomaterial and its role in the sensor system. The review indicates that diverse nanosensors have been developed, capable of detecting analytes such as pesticides, mycotoxins, fertilizers, microorganisms, heavy metals, and various additives with exceptional analytical performance. Current trends in the design of such sensors are highlighted and challenges which need to be overcome in the future are discussed.

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Silver nanoparticles-based colorimetric array for the detection of Thiophanate-methyl

Cited by 25 publications

References 36 publications

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Smart MOF‐on‐MOF Hydrogel as a Simple Rod‐shaped Core for Visual Detection and Effective Removal of Pesticides

Recent Advances in (Bio)Chemical Sensors for Food Safety and Quality Based on Silver Nanomaterials

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