We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Flower-shaped ZnO–CeO<sub>2</sub> nanorectangulates: an efficient photocatalyst for degradation of endocrine disruptor 2,4-dichlorophenoxy acetic acid under visible light.
- Authors
Suganya Josephine, G A; Jayaprakash, K; Sivasamy, A
- Abstract
Nanosized, rectangularly arranged ZnO–CeO2 nanoflowers were prepared by a simple hydrothermal technique. The prepared nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV–visible differential reflectance spectroscopy, field-emission scanning electron microscope, X-ray photoelectron spectroscopy, electron paramagnetic resonance and Brunauer-Emmett-Teller techniques. Different compositions of composites were prepared and the best composition was used for conducting the photocatalytic studies. The degradation of 2,4-dichlorophenoxy acetic acid (2,4-D), a herbicide and endocrine-disrupting agent, was performed under visible-light irradiation. The results showed the nanocomposite to be in a flower-like structure comprising of rectangular-shaped ZnO on which CeO2 particles were evenly distributed. This flower-shaped ZnO–CeO2 nanorectangulate composite comprises particle sizes ranging from 50–100 nm of rectangular thickness and 10–20 nm spherical particles. The XRD and FT-IR results prove the presence of ZnO and CeO2 in the prepared nanocomposite. The bandgap energy was found to be 3.18 eV. X-ray photoelectron spectroscopy proved the presence of Ce as Ce4+ (CeO2) in the prepared composite. A comparative study of nanocomposite and pristine ZnO showed increased activity. The photocatalytic preliminary and kinetic studies were conducted. The reaction followed pseudo-first-order kinetics. The UV–visible absorption spectrum and chemical oxygen demand decrease proved the complete degradation of the endocrine disruptor 2,4-D under visible-light irradiation.
- Subjects
ENDOCRINE disruptors; ZINC oxide; VISIBLE spectra; ACETIC acid; X-ray photoelectron spectroscopy; HERBICIDES; PHOTOCATALYSIS kinetics
- Publication
Bulletin of Materials Science, 2022, Vol 45, Issue 3, p1
- ISSN
0250-4707
- Publication type
Article
- DOI
10.1007/s12034-022-02687-4