Photocatalytic activity of nano-sized Ag and Au metal-doped TiO2 embedded in rGO under visible light irradiation

•TiO2, Ag-doped TiO2, Au doped TiO2, and Ag, Au-doped TiO2 and embedded in rGO were prepared.•The doped samples exhibits a strong light absorbance in the visible light region.•The photocatalytic activity was found to increase in the order TAg,Au/rGO > TAg/rGO > TAu/rGO > TAg,Au > TAg >...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2022-12, Vol.286, p.116023, Article 116023
Main Authors: Khairy, M., Kamar, E.M., Mousa, M.A.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•TiO2, Ag-doped TiO2, Au doped TiO2, and Ag, Au-doped TiO2 and embedded in rGO were prepared.•The doped samples exhibits a strong light absorbance in the visible light region.•The photocatalytic activity was found to increase in the order TAg,Au/rGO > TAg/rGO > TAu/rGO > TAg,Au > TAg > TAu > TrGO > TiO2 (T).•The kinetics of the photocatalytic reaction followed the first-order relationship. This study looks at the structural, optical properties, and comparative visible light photocatalytic activity of Ag/Au-TiO2 doped nanotubes and the impact of embedding them in rGO. The studied materials were characterized using XRD, SEM, TEM, XPS, BET, Raman spectra, diffuse reflectance spectroscopy (DRS), electrochemical impedance spectroscopy (EIS), and open-circuit voltage decay (OCVD), and photocurrent transient response (PCTR). The photocatalytic activity was found to increase in the order TAg,Au/rGO > TAg/rGO > TAu/rGO > TAg,Au > TAg > TAu > TrGO > TiO2 (T). Under optimal conditions, complete MB degradation is achieved in one hour. The kinetics of the photocatalytic reaction followed the first-order relationship. A photocatalytic mechanism has been proposed.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2022.116023