Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos. Issue 7 (10th January 2022)

• Record Type: Journal Article
• Authors: Dash, Smruti Ranjan; Bag, Subhendu Sekhar; Golder, Animes Kumar
• Is Part Of: Electroanalysis. Volume 34:Issue 7(2022)
• Page Start: 1141
• Page End: 1149
• Publication Date: 2022-01-10
• Subjects: Waste biomass -- Carbon dots -- Hydrothermal synthesis -- Chlorpyrifos sensing -- Electrochemical sensor; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.202100344
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: Carbon dots (CDs) modified GCE was used for the electrochemical sensing of Chlorpyrifos (CHL). The hydrothermal synthesis (200 °C for 10 h) produced CDs of 3.7 nm using Psidium guajava leaves. Square wave voltammetry was employed for the determination of CHL and the electrokinetic parameters. The reduction of CHL involved an irreversible two‐electron process with heterogeneous reaction rate ( k° ) and formal potential (E°) of 1.21 s −1 and −1.34 V respectively. The modified GCEs exhibited good repeatability (RSD 4.7 %), reproducibility (RSD 1.17 %), and sensitivity (1.30 mA μM −1 cm −2 ). The detection limit and linear ranges were 1.5 nM and 0.01–1 μM, respectively. Electrochemical sensing of CHL was comparable with the HPLC (∼5 % variation). Abstract :