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Novel composite of Zn/Ti-layered double hydroxide coupled with MXene for the efficient photocatalytic degradation of pharmaceuticals
Abstract
In the present study, a hybrid photocatalyst of Zn/Ti layered double hydroxide (LDH) coupled with MXene – Ti3C2 was synthesized for the first time and applied in photocatalytic degradation of acetaminophen and ibuprofen, two commonly present in the natural environment and prone to accumulate in the aquatic ecosystem pharmaceuticals. The effect of MXene content (0.5 wt%, 2.5 wt%, and 5 wt%) on the photocatalytic activity of LDH/MXene composite was investigated. The composite of LDH/MXene containing 2.5 wt% of MXene revealed the highest photocatalytic activity in the degradation of acetaminophen (100% within 40 minutes) and ibuprofen (99.7% within 60 minutes). Furthermore, an improvement in acetaminophen and ibuprofen mineralization was observed for the composite material. Meanwhile, the introduction of interfering ions (Na+, Ca2+, Mg2+, Cl-, SO42-) in the model seawater did not affect the removal efficiency of both pharmaceuticals. The photocatalytic experiment performed in the four subsequent cycles, as well as FTIR, TEM, and XPS analyses after the photodegradation process confirmed the excellent stability and reusability of the prepared composite material. In order to evaluate the effect of various reactive oxidizing species (ROS) on the photocatalytic process, the trapping experiment was applied. It was noticed that •O2- had the main contribution in photocatalytic degradation of acetaminophen, while •OH and h+ mainly affected the degradation of ibuprofen. Finally, based on the results of Mott Schottky analysis, bandgap calculation, and ROS trapping experiment, the possible mechanism for pharmaceuticals degradation was proposed. This research illustrates the feasibility and novelty of the treatment of pharmaceuticals by LDH/MXene composites, implying that MXene plays a significant role in the electron-hole separation and thus high photocatalytic activity.
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Authors (6)
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Paweł Głuchowski
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.chemosphere.2022.136191
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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CHEMOSPHERE
no. 308,
ISSN: 0045-6535 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Grzegórska A., Wysocka I., Głuchowski P., Ryl J., Karczewski J., Zielińska-Jurek A.: Novel composite of Zn/Ti-layered double hydroxide coupled with MXene for the efficient photocatalytic degradation of pharmaceuticals// CHEMOSPHERE -Vol. 308,iss. Part 1 (2022), s.136191-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.chemosphere.2022.136191
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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