2D TiS2 flakes for tetracycline hydrochloride photodegradation under solar light

Madina Telkhozhayeva; Baruch Hirsch; Rajashree Konar; Eti Teblum; Ronit Lavi; Michal Weitman; Bibhudatta Malik; Elisa Moretti; Gilbert Daniel Nessim

doi:10.1016/j.apcatb.2022.121872

2D TiS₂ flakes for tetracycline hydrochloride photodegradation under solar light

Madina Telkhozhayeva, Baruch Hirsch, Rajashree Konar, Eti Teblum, Ronit Lavi, Michal Weitman, Bibhudatta Malik, Elisa Moretti, Gilbert Daniel Nessim

Ca' Foscari University of Venice

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

Here, we report a simple route of synthesizing bulk layered TiS₂ via chemical vapor transport (CVT) using non-toxic inorganic precursors, followed by successful isolation of few-layered TiS₂ flakes using high-frequency-based liquid-phase exfoliation. Exfoliated TiS₂ flakes exhibit significantly enhanced photocatalytic activity towards the degradation of tetracycline hydrochloride (TCH) under simulated solar light irradiation, achieving ~ 95% degradation efficiency with its reaction rate constants six times higher than that of the bulk counterpart. The underlying degradation mechanism can be attributed to the fully exposed reactive sites originating from the well-defined layered structure. Trapping experiments coupled with electron paramagnetic resonance (EPR) measurements confirm the generation of electrons and hydroxyl radicals as major active species. The photodegradation pathway and intermediates of TCH were studied in-depth through liquid chromatography-mass spectrometry (LC-MS). The current work provides new insight into using exfoliated TiS₂ for environmental remediation.

Original language	English
Article number	121872
Journal	Applied Catalysis B: Environmental
Volume	318
DOIs	https://doi.org/10.1016/j.apcatb.2022.121872
State	Published - 5 Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Funding

The authors acknowledge Dr. Ilana Perelshtein from Bar Ilan Institute for Nanotechnology & Advanced Materials (BINA) for HRTEM images acquisition. MT also acknowledges Dr. Reut Cohen and Dr. Yulia Shenberger from Mass Spectrometry Division at Bar-Ilan University for thoughtful discussions. MT thanks the Erasmus+ ICM student exchange program with Ca' Foscari University of Venice (ERASMUS+ KA1-ICM), funded by the European Commission through the National Erasmus+ Agency INDIRE. The authors acknowledge Dr. Ilana Perelshtein from Bar Ilan Institute for Nanotechnology & Advanced Materials (BINA) for HRTEM images acquisition. MT also acknowledges Dr. Reut Cohen and Dr. Yulia Shenberger from Mass Spectrometry Division at Bar-Ilan University for thoughtful discussions. MT thanks the Erasmus+ ICM student exchange program with Ca' Foscari University of Venice (ERASMUS+ KA1-ICM), funded by the European Commission through the National Erasmus+ Agency INDIRE.

Funders	Funder number
Mass Spectrometry Division at Bar-Ilan University
Università Ca' Foscari Venezia
European Commission
Erasmus+	+ KA1-ICM

Keywords

2D Flakes
Exfoliation
Photocatalysis
Tetracycline
TiS

Access to Document

10.1016/j.apcatb.2022.121872

Cite this

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title = "2D TiS2 flakes for tetracycline hydrochloride photodegradation under solar light",

abstract = "Here, we report a simple route of synthesizing bulk layered TiS2 via chemical vapor transport (CVT) using non-toxic inorganic precursors, followed by successful isolation of few-layered TiS2 flakes using high-frequency-based liquid-phase exfoliation. Exfoliated TiS2 flakes exhibit significantly enhanced photocatalytic activity towards the degradation of tetracycline hydrochloride (TCH) under simulated solar light irradiation, achieving ~ 95% degradation efficiency with its reaction rate constants six times higher than that of the bulk counterpart. The underlying degradation mechanism can be attributed to the fully exposed reactive sites originating from the well-defined layered structure. Trapping experiments coupled with electron paramagnetic resonance (EPR) measurements confirm the generation of electrons and hydroxyl radicals as major active species. The photodegradation pathway and intermediates of TCH were studied in-depth through liquid chromatography-mass spectrometry (LC-MS). The current work provides new insight into using exfoliated TiS2 for environmental remediation.",

keywords = "2D Flakes, Exfoliation, Photocatalysis, Tetracycline, TiS",

author = "Madina Telkhozhayeva and Baruch Hirsch and Rajashree Konar and Eti Teblum and Ronit Lavi and Michal Weitman and Bibhudatta Malik and Elisa Moretti and Nessim, {Gilbert Daniel}",

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year = "2022",

month = dec,

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doi = "10.1016/j.apcatb.2022.121872",

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AU - Telkhozhayeva, Madina

AU - Hirsch, Baruch

AU - Konar, Rajashree

AU - Teblum, Eti

AU - Lavi, Ronit

AU - Weitman, Michal

AU - Malik, Bibhudatta

AU - Moretti, Elisa

AU - Nessim, Gilbert Daniel

PY - 2022/12/5

Y1 - 2022/12/5

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