Graphene-based ZnCr layered double hydroxide nanocomposites as bactericidal agents with high sonophotocatalytic performances for degradation of rifampicin

Tannaz Sadeghi Rad; Alireza Khataee; Samira Arefi-Oskoui; Samin Sadeghi Rad; Yasin Orooji; Erhan Gengec; Mehmet Kobya

doi:10.1016/j.chemosphere.2021.131740

Graphene-based ZnCr layered double hydroxide nanocomposites as bactericidal agents with high sonophotocatalytic performances for degradation of rifampicin

Chemosphere. 2022 Jan;286(Pt 2):131740. doi: 10.1016/j.chemosphere.2021.131740. Epub 2021 Jul 30.

Authors

Tannaz Sadeghi Rad¹, Alireza Khataee², Samira Arefi-Oskoui³, Samin Sadeghi Rad³, Yasin Orooji⁴, Erhan Gengec⁵, Mehmet Kobya⁶

Affiliations

¹ Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.
² Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran. Electronic address: akhataee@gtu.edu.tr.
³ Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran.
⁴ College of Materials Science and Engineering, Nanjing Forestry University, No. 159, Longpan Road, Nanjing, 210037, Jiangsu, People's Republic of China.
⁵ Department of Environmental Protection Technology, Kocaeli University, 41285, Kartepe, Kocaeli, Turkey.
⁶ Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Department of Environmental Engineering, Kyrgyz-Turkish Manas University, 720038, Bishkek, Kyrgyzstan.

PMID: 34352538
DOI: 10.1016/j.chemosphere.2021.131740

Abstract

Herein, ZnCr layered double hydroxide (ZnCr LDH), and its nanocomposites with GO and rGO were synthesized using the co-precipitation method. The samples were characterized using XRD, FT-IR, SEM, TEM, BET, and XPS techniques. The sonophotocatalytic activity of the ZnCr LDH, ZnCr LDH/GO, and ZnCr LDH/rGO was investigated via the degradation of rifampicin (RIF) in the ultrasonic bath under visible light irradiation. The synergy index of more than 1 determined for ZnCr LDH/rGO indicated the positive interaction of sonocatalysis and photocatalysis resulted by hybridizing the LDH nanosheets with rGO. The maximum sonophotocatalytic degradation efficiency of 87.3% was achieved in the presence of ZnCr LDH/rGO nanocomposite with the concentration of 1.5 g L^-1 for degradation of RIF with an initial concentration of 15 mg L^-1 within 60 min sonication under visible light irradiation. The addition of different scavengers indicated that hydroxyl radicals, superoxide anion radicals, and the generated holes played a dominant role in the degradation of the pollutant molecules. A possible degradation mechanism was suggested based on the intermediates. The antibacterial tests confirmed the higher antibacterial activity of ZnCr LDH/GO compared with ZnCr LDH and ZnCr LDH/rGO against Gram-positive Staphylococcus aureus.

Keywords: Advanced oxidation process; Antibacterial assessment; Carbon-based nanocomposite; Layered double hydroxide; Sonophotocatalysis.

MeSH terms

Anti-Bacterial Agents
Graphite*
Hydroxides
Nanocomposites*
Rifampin
Spectroscopy, Fourier Transform Infrared

Substances

Anti-Bacterial Agents
Hydroxides
Graphite
Rifampin