Hydrogen bond mediated turn-on sensor: Ultra-sensitive and label free barium-MOF for probing malathion an organophosphate pesticide

Preethi, P.; Harisankar, A.; Veedu, Sreevidya Thekku; Raghunandan, Resmi

doi:10.1016/j.molstruc.2023.135542

Cited by 7 publications

(1 citation statement)

References 62 publications

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“…Nonenzymatic electrochemical sensors such as various metal oxides, for instance, CuO, ZnO, Fe 2 O 3 , Co 3 O 4 , and NiO, have been employed because of their excellent electrocatalytic activity, great abundance, low cost, and their ability to conduct electrochemical reactions at lower potentials [12,13]. The p-type semiconducting material of copper oxide (CuO) has been used in different applications in supercapacitors, electrochemical sensors, CO 2 reduction, and photocatalysts due to its inexpensiveness, ease of storage, and high specific capacitance properties [14][15][16]. CuO-based nanomaterials have been used in electrochemical sensors to detect various organic and inorganic molecules and pollutants, for instance, the application of CuO nanoparticles onto multi-walled carbon arrays as glucose sensors [17,18].…”

Section: Introductionmentioning

confidence: 99%

Detection of Environmentally Harmful Malathion Pesticides Using a Bimetallic Oxide of CuO Nanoparticles Dispersed over a 3D ZnO Nanoflower

Gurusamy,

Cheng,

Anandan

et al. 2023

Materials

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Super-sensitive malathion detection was achieved using a nonenzymatic electrochemical sensor based on a CuO/ZnO-modified glassy carbon electrode (GCE). Due to the high affinity between the Cu element and the sulfur groups in malathion, the developed CuO-ZnO/GCE sensor may bond malathion with ease, inhibiting the redox signal of the Cu element when malathion is present. In addition to significantly increasing the ability of electron transfer, the addition of 3D-flower-like ZnO enhances active sites of the sensor interface for the high affinity of malathion, giving the CuO-ZnO/GCE composite an exceptional level of sensitivity and selectivity. This enzyme-free CuO-ZnO/GCE malathion sensor demonstrates outstanding stability and excellent detection performance under optimal operating conditions with a wide linear range of malathion from 0 to 200 nM and a low detection limit of 1.367 nM. A promising alternative technique for organophosphorus pesticide (OP) determination is offered by the analytical performance of the proposed sensor, and this method can be quickly and sensitively applied to samples that have been contaminated with these pesticides.

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