Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 13, 2020
Previous Article Next Article

Enhanced visible light-active CeO2/CuO/Ag2CrO4 ternary heterostructures based on CeO2/CuO nanofiber heterojunctions for the simultaneous degradation of a binary mixture of dyes

Author affiliations

Abstract

In the present work, a novel CeO2/CuO/Ag2CrO4 ternary nanocomposite based on CeO2/CuO fibers by loading Ag2CrO4 nanoparticles has been prepared using electrospinning, calcination and chemical precipitation methods. The samples were characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) method and Fourier-transform infrared spectroscopy (FT-IR). The as-obtained CeO2/CuO/Ag2CrO4 composite exhibited excellent photocatalytic performance in the photo-degradation of a mixture of Rose bengal (RB) and methylene blue (MB) in an aqueous solution under visible light (LED) irradiation. DRS analysis illustrated that the CeO2/CuO/Ag2CrO4 composite exhibited enhanced absorption in the visible region, which was attributed to the CeO2/CuO nanofibers. The as-synthesized photocatalyst demonstrated higher photocatalytic activities compared to the single CeO2/CuO nanofibers and Ag2CrO4 nanoparticles. Furthermore, the ternary composite exhibited the highest RB and MB photo-degradation rates of about 0.0299 and 0.0235 min−1, respectively, at 300 rpm under visible light irradiation. The effect of four effective variables, namely, the initial concentrations of RB and MB, photocatalyst dosage, and irradiation time was studied and optimized using the central composite design. The kinetic studies confirmed the pseudo first order reaction based on the Langmuir–Hinshelwood model, while its rate constant (kobs) and L–H rate constant (kr) were 0.097 min−1 and 5.773 mg L−1 min−1 for RB and 0.0669 min−1 and 2.017 mg L−1 for MB, respectively.

Graphical abstract: Enhanced visible light-active CeO2/CuO/Ag2CrO4 ternary heterostructures based on CeO2/CuO nanofiber heterojunctions for the simultaneous degradation of a binary mixture of dyes

Back to tab navigation

Article information


Submitted
15 Jan 2020
Accepted
24 Feb 2020
First published
11 Mar 2020

New J. Chem., 2020,44, 5033-5048
Article type
Paper

Enhanced visible light-active CeO2/CuO/Ag2CrO4 ternary heterostructures based on CeO2/CuO nanofiber heterojunctions for the simultaneous degradation of a binary mixture of dyes

M. M. Sabzehmeidani, H. Karimi and M. Ghaedi, New J. Chem., 2020, 44, 5033
DOI: 10.1039/D0NJ00173B

Social activity

Search articles by author

Spotlight

Advertisements