The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan

Sara Knežević; Jelena Ostojić; Miloš Ognjanović; Slađana Savić; Aleksandra Kovačević; Dragan Manojlović; Vesna Stanković; Dalibor Stanković

doi:10.1016/j.scitotenv.2022.159250

The environmentally friendly approaches based on the heterojunction interface of the LaFeO₃/Fe₂O₃@g-C₃N₄ composite for the disposable and laboratory sensing of triclosan

Sci Total Environ. 2023 Jan 20;857(Pt 1):159250. doi: 10.1016/j.scitotenv.2022.159250. Epub 2022 Oct 6.

Authors

Sara Knežević¹, Jelena Ostojić², Miloš Ognjanović³, Slađana Savić², Aleksandra Kovačević², Dragan Manojlović², Vesna Stanković⁴, Dalibor Stanković⁵

Affiliations

¹ Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires, UMR 5255, F-33400 Talence, France. Electronic address: packdatc@gmail.com.
² Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
³ University of Belgrade, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Mike Petrovića Alasa 12-14, 11000 Belgrade, Serbia.
⁴ Scientific Institution, Institute of Chemistry, Technology and Metallurgy, National Institute University of Belgrade, Belgrade, Serbia.
⁵ Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; University of Belgrade, VINČA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Mike Petrovića Alasa 12-14, 11000 Belgrade, Serbia.

PMID: 36208761
DOI: 10.1016/j.scitotenv.2022.159250

Abstract

Triclosan (TCS) is a polychlorinated phenoxy phenol (PCPPs) used as a disinfectant and a broad-spectrum antibacterial and antifungal agent in personal hygiene products. TCS easily forms diphenyl ethers and dioxins, which are persistent organic pollutants. This work used a double approach for the TSC sensing: a) screen-printed (SPE) electrochemical platform for on-site application, modified with lanthanum iron oxide and graphitic carbon nitride composite (LaFeO₃/Fe₂O₃@g-C₃N₄/SPE); and b) carbon paste electrode (CPE), modified with the same material and used in laboratory conditions. Linear range from 0.1 μM to 10 μM, the limit of detection (LOD) of 29 nM and the limit of quantification (LOQ) of 91 nM were obtained for CP electrode in BRBS pH 8. SPE showed the best analytical parameters in BRBS at pH 3, with a linear range from 0.3 μM to 7 μM, LOD of 0.09 μM and LOQ of 0.28 μM. Furthermore, the influence of potential interferents was investigated and proven to be negligible. Determination of TSC was performed to estimate the environmental impact of this compound as well as the practical usefulness of the proposed sensor in the real sample analysis, confirmed with a HPLC analysis.

Keywords: Electrochemical sensor; Graphitic carbon nitride; Green analytical chemistry; LaFeO(3)/Fe(2)O(3); Triclosan.

MeSH terms

Electrochemical Techniques*
Electrodes
Limit of Detection
Triclosan*

Substances

Triclosan