Colorimetric Nanozyme Sensor Array Based on Metal Nanoparticle-Decorated CNTs for Quantification of Pesticides in Real Water and Soil Samples

Abstract

Pesticides have become a concern to the environment and human health, since they are frequently employed to control pests and regulate plant growth. Although array-based pattern recognition has been demonstrated to be a successful method for identifying a variety of analytes, developing sensing components that possess a desirable surface diversity remains a difficult task. Herein, we fabricated a metal nanoparticle-decorated CNT (MDC) nanozyme in the presence of a cationic receptor to produce diverse noncovalent interactions when various pesticides were adsorbed on the MDCs, which resulted in the enhancement of their peroxidase-mimicking activities with different degrees, and utilized it as a colorimetric sensor array for pesticide identification. The designed MDC sensor array could successfully distinguish eight pesticides that exhibited different fingerprint-like sequences at a concentration of 10 μM or successfully segregated CBZ, DTM, and ISP pesticides having a linear range varying from 1 to 8 μM and quantified as low as 10.8, 28.8, and 16.8 nM with R 2 values of 0.983, 0.949, and 0.977, respectively. Very interestingly, two pesticides having similar structures (CBZ and ISP) have been precisely discriminated by a sensor array without any overlapping. Additionally, the effective segregation of pesticides in spiked soil and water samples without cross-classification demonstrated the practicability of the MDC sensor array.

An Encyclopedic Compendium on Chemosensing Supramolecular Metal‐Organic Gels

“…Pushing metal-derived gelator composite [334] for combating marine oil spills [335] can be another crucial practical use and studies can even be explored for the detoxification step. [336] Gelation properties of non-traditional materials like polyphenol-modified titanium-oxo compounds [337] can be researched. Metal-phenolic [290] based material for metalion-responsive adhesive material [338] can be developed.…”

Cation–π-induced mixed-matrix nanocomposite for the detection and removal of Hg2+ and azinphos-methyl towards environment remediation

“…18 Furthermore, Singh and co-workers have reported various MWCNTs-modified composites for the recognition of toxic pollutants. [19][20][21][22] Apart from this, ionic liquids exhibit good cation-π interaction with MWCNTs, thus effectively preventing damage to the extended conjugation and conductive properties of the MWCNTs. [22][23][24][25] The literature studies reveal that there is no such material reported which is capable of simultaneously removing mercury metal and the azinphosmethyl pesticide from contaminated water.…”

“…[19][20][21][22] Apart from this, ionic liquids exhibit good cation-π interaction with MWCNTs, thus effectively preventing damage to the extended conjugation and conductive properties of the MWCNTs. [22][23][24][25] The literature studies reveal that there is no such material reported which is capable of simultaneously removing mercury metal and the azinphosmethyl pesticide from contaminated water. Keeping this in mind, the advantages of MWCNTs and cation-π interaction with the ionic liquid, a cost-effective and catalytically efficient material has been designed for the dual-response electrocatalytic quantification and mitigation of Hg 2+ and azinphos-methyl towards environment remediation (Fig.…”

Calixarene-Based Supramolecular Sensor Array for Pesticide Discrimination

“…Table S8: The training matrix of fluorescence response patterns in the presence of 10% soil extract. Table S9: The training matrix of fluorescence response patterns in the presence of 20% soil extract [ 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ].…”