Colorimetric sensing of chlorpyrifos through negative feedback inhibition of the catalytic activity of silver phosphate oxygenase nanozymes

Kushwaha, Amisha; Singh, Gajendar; Sharma, Manu

doi:10.1039/c9ra10719c

Cited by 45 publications

(13 citation statements)

References 51 publications

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“…A detection limit of 1.82 μM pyrophosphate was able to be achieved. Kushwaha et al [ 150 ] reported the oxidase-like activity of Ag 3 PO 4 nanoparticles for the colorimetric detection of chlorpyrifos using TMB as a substrate. Ag 3 PO 4 was able to oxidise chlorpyrifos to chlorpyrifos oxon and sulphide ions.…”

Section: Detection Of Pesticidesmentioning

confidence: 99%

Nanozymes for Environmental Pollutant Monitoring and Remediation

Wong¹,

Vuong²,

Chow³

2021

Sensors

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Nanozymes are advanced nanomaterials which mimic natural enzymes by exhibiting enzyme-like properties. As nanozymes offer better structural stability over their respective natural enzymes, they are ideal candidates for real-time and/or remote environmental pollutant monitoring and remediation. In this review, we classify nanozymes into four types depending on their enzyme-mimicking behaviour (active metal centre mimic, functional mimic, nanocomposite or 3D structural mimic) and offer mechanistic insights into the nature of their catalytic activity. Following this, we discuss the current environmental translation of nanozymes into a powerful sensing or remediation tool through inventive nano-architectural design of nanozymes and their transduction methodologies. Here, we focus on recent developments in nanozymes for the detection of heavy metal ions, pesticides and other organic pollutants, emphasising optical methods and a few electrochemical techniques. Strategies to remediate persistent organic pollutants such as pesticides, phenols, antibiotics and textile dyes are included. We conclude with a discussion on the practical deployment of these nanozymes in terms of their effectiveness, reusability, real-time in-field application, commercial production and regulatory considerations.

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Section: Detection Of Pesticidesmentioning

confidence: 99%

Nanozymes for Environmental Pollutant Monitoring and Remediation

Wong¹,

Vuong²,

Chow³

2021

Sensors

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“…For the assays based on nanozyme activity modulation, these nanozyme-only detection systems require that the target has unique structures and interactions with nanozymes [19,[96][97][98][99][100][101][102]. For instance, our group developed a bioenzyme-free colorimetric assay of malathion, where the oxidase-mimetic activity of Ag3PO4/UiO-66 could be in- Although the binary ChE-nanozyme assays have great potential for pesticide and related biomarker determination, they have some limits that will impede their commercial fabrication.…”

Section: Assays Based On Nanozyme Activity Modulationmentioning

confidence: 99%

Nanozyme-Participated Biosensing of Pesticides and Cholinesterases: A Critical Review

Zhu

Liu

et al. 2021

Biosensors

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To improve the output and quality of agricultural products, pesticides are globally utilized as an efficient tool to protect crops from insects. However, given that most pesticides used are difficult to decompose, they inevitably remain in agricultural products and are further enriched into food chains and ecosystems, posing great threats to human health and the environment. Thus, developing efficient methods and tools to monitor pesticide residues and related biomarkers (acetylcholinesterase and butylcholinesterase) became quite significant. With the advantages of excellent stability, tailorable catalytic performance, low cost, and easy mass production, nanomaterials with enzyme-like properties (nanozymes) are extensively utilized in fields ranging from biomedicine to environmental remediation. Especially, with the catalytic nature to offer amplified signals for highly sensitive detection, nanozymes were finding potential applications in the sensing of various analytes, including pesticides and their biomarkers. To highlight the progress in this field, here the sensing principles of pesticides and cholinesterases based on nanozyme catalysis are definitively summarized, and emerging detection methods and technologies with the participation of nanozymes are critically discussed. Importantly, typical examples are introduced to reveal the promising use of nanozymes. Also, some challenges in the field and future trends are proposed, with the hope of inspiring more efforts to advance nanozyme-involved sensors for pesticides and cholinesterases.

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“…However, despite the high sensitivity and field applicability of this electrochemical sensor, the sample preparation was complex. Therefore, to overcome this limitation, the colorimetric method [ 22 , 23 , 24 ] and SERS [ 22 , 25 , 26 , 27 , 28 , 29 , 30 ] techniques were adopted. The SERS-based detection techniques did not require a separate probe to capture targets that were easily detected with high sensitivity because the unique characteristics of CPF could be immediately confirmed in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Detection of Chlorpyrifos Using Bio-Inspired Silver Nanograss

Park

Lee

et al. 2022

Materials

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Chlorpyrifos (CPF) is widely used as an organophosphorus insecticide; however, owing to developmental neurotoxicity, genotoxicity, and other adverse effects, it is harmful not only to livestock but also to humans. Therefore, the use of CPF was recently regulated, and its sensitive detection is crucial, as it causes serious toxicity, even in the case of residual pesticides. Because it is hard to detect the chlorpyrifos directly using spectroscopy (especially in SERS) without chemical reagents, we aimed to develop a SERS platform that could detect the chlorpyrifos directly in the water. In this study, we utilized the intrinsic properties of natural lawns that grow randomly and intertwine with each other to have a large surface area to promote photosynthesis. To detect CPF sensitively, we facilitated the rapid fabrication of biomimetic Ag nanograss (Ag-NG) as a surface-enhanced Raman spectroscopy (SERS) substrate using the electrochemical over-deposition method. The efficiency of the SERS method was confirmed through experiments and finite element method (FEM)-based electromagnetic simulations. In addition, the sensitive detection of CPF was enhanced by pretreatment optimization of the application of the SERS technique (limit of detection: 500 nM). The Ag-NG has potential as a SERS platform that could precisely detect organic compounds, as well as various toxic substances.

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Colorimetric sensing of chlorpyrifos through negative feedback inhibition of the catalytic activity of silver phosphate oxygenase nanozymes

Abstract: Ag3PO4 oxygenase nanozymatic activity towards chlorpyrifos sensing.

Cited by 45 publications

References 51 publications

Nanozymes for Environmental Pollutant Monitoring and Remediation

Nanozymes for Environmental Pollutant Monitoring and Remediation

Nanozyme-Participated Biosensing of Pesticides and Cholinesterases: A Critical Review

Detection of Chlorpyrifos Using Bio-Inspired Silver Nanograss

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