An electrochemical sensor on the hierarchically porous Cu-BTC MOF platform for glyphosate determination

Cao, Yu; Wang, Luona; Shen, Chao; Wang, Chengyin; Hu, Xiaoyun; Wang, Guoxiu

doi:10.1016/j.snb.2018.12.064

Cited by 170 publications

(71 citation statements)

References 55 publications

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“…The sensor performance was investigated in a 0.03 to 13 μmol L À 1 Glyp concentration range, and for higher concentrations the calibration plot is not linear ( Figure S2). Similar behavior has also been noticed by Cao et al [27] and could be explained by the limiting amount of Cu(II) generated over the electrode surface. However, such linearity can be observed for very low Glyp concentrations.…”

Section: Analytical Performance Of the Npc-modified Cu Microelectrodesupporting

confidence: 87%

“…Copper-based organometallic compounds like copper phthalocyanine composited with carbon nanotubes were also used for direct voltammetric determination of Glyp, [24] and the developed sensor showed very high sensitivity and detection limit in the nmol L À 1 range, which is below the mandated guidelines. In recent years, different types of nanomaterials like layered double hydroxides, [25] electrogenerated copper nanoparticles, [26] copper-based metal-organic framework, [27] and copper nanowires [28] have been used to detect Glyp, and they have exhibited very high sensitivity and selectivity towards such analyte. Besides nanomaterials based on copper, cross-linked imprinted polymer modified carbon [29] and anti-glyphosate antibody-modified magnetic beads based screen-printed electrodes [30] have been also used in the development of highly sensitive and selective electroanalytical platforms for Glyp determination.…”

Section: Introductionmentioning

confidence: 99%

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An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

et al. 2020

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A nanoporous copper (NPC) film was electrodeposited on a copper microelectrode, and the generated platform was investigated for electrochemical sensing of glyphosate (Glyp). The as-deposited NPC film was highly pure and crystalline according to results of energy dispersive spectroscopy and Xray diffraction experiments, respectively. Scanning electron microscopy images confirm the NPC films possess a highly porous morphology containing dendrite fractals, and the electrodeposition parameters, particularly potential (E d ) and time (t d ), exert a remarkable influence on the structure of the films. Such changes in the NPC morphology with E d and t d were also correlated with the electrochemical behavior investigated by cyclic voltammetry. In the presence of Glyp, the anodic oxidation is facilitated because copper ions diffuse easily through the pores of the NPC film and form a complex with the analyte at the electrode interface. On the other hand, as the amount of copper oxides decreases due to the formation of soluble Cu(II) complex with Glyp, less current is obtained during the reverse scan, allowing a relationship between the decrease in the cathodic current and the Glyp concentration to be established. The optimized NPC-modified Cu microelectrode showed very high sensitivity (14 nA nmol À 1 L), low detection limit (4 nmol L À 1 ), excellent reproducibility, and selective response for Glyp. The applicability of the sensor was demonstrated by detecting Glyp in river water samples.[a] Dr.

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Section: Analytical Performance Of the Npc-modified Cu Microelectrodesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

et al. 2020

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“…The glyphosate molecule, containing P]O, C]O and N-H chelating groups, has a stronger affinity towards Cu 2+ ions than other common pesticides. 36 In order to prove the method feasibility in real sample analysis, recovery tests were employed by adding different amounts of glyphosate into milk samples. The results are shown in Table 3.…”

Section: Quantitative Determination Of Glyphosatementioning

confidence: 99%

Effect of glyphosate on X-ray diffraction of copper films prepared by electrochemical deposition

Zhang

Chong

et al. 2019

RSC Adv.

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“…Glyphosate has been reported to be detected using bare and modified electrodes made of gold [28,[37][38][39][40][41][42][43][44], copper [45][46][47], carbon [48][49][50][51][52][53][54], mercury [55][56][57], and platinum [58,59]. Electrochemical methods, type of electrodes, analytical performance, measurement condition, and sample matrix for glyphosate determination are summarized in Table 1.…”

Section: Electrochemical Detection Of Glyphosatementioning

confidence: 99%

Recent Development on the Electrochemical Detection of Selected Pesticides: A Focused Review

Noori¹,

Mortensen

Geto³

2020

Sensors

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Pesticides are heavily used in agriculture to protect crops from diseases, insects, and weeds. However, only a fraction of the used pesticides reaches the target and the rest slips through the soil, causing the contamination of ground-and surface water resources. Given the emerging interest in the on-site detection of analytes that can replace traditional chromatographic techniques, alternative methods for pesticide measuring have recently encountered remarkable attention. This review gives a focused overview of the literature related to the electrochemical detection of selected pesticides. Here, we focus on the electrochemical detection of three important pesticides; glyphosate, lindane and bentazone using a variety of electrochemical detection techniques, electrode materials, electrolyte media, and sample matrix. The review summarizes the different electrochemical studies and provides an overview of the analytical performances reported such as; the limits of detection and linearity range. This article highlights the advancements in pesticide detection of the selected pesticides using electrochemical methods and point towards the challenges and needed efforts to achieve electrochemical detection suitable for on-site applications.

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An electrochemical sensor on the hierarchically porous Cu-BTC MOF platform for glyphosate determination

Cited by 170 publications

References 55 publications

An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

An Electrochemically Synthesized Nanoporous Copper Microsensor for Highly Sensitive and Selective Determination of Glyphosate

Effect of glyphosate on X-ray diffraction of copper films prepared by electrochemical deposition

Recent Development on the Electrochemical Detection of Selected Pesticides: A Focused Review

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