Journal
CHEMICAL ENGINEERING JOURNAL
Volume 209, Issue -, Pages 420-428Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.08.012
Keywords
LaFeO3; Microsphere; Growth mechanism; Raman; Photocatalytic activity; Visible light
Categories
Funding
- Jawaharlal Nehru Memorial Fund for Doctoral studies [SU-A/270/2011-2012/388]
Ask authors/readers for more resources
The novel microspheres composed of perovskite LaFeO3 nanoparticles have been successfully prepared by hydrothermal method via self assembly process. Hydrothermal reaction conditions and citric acid concentration plays a vital role in the formation of LaFeO3 microspheres. The obtained microspheres have been structurally characterized by X-ray diffraction analysis (XRD) which confirms the single crystalline orthorhombic structure. The structural information was also confirmed from the Raman spectrum and the average crystallite size obtained from XRD increases with increasing hydrothermal reaction time. The composition and thermal decomposition processes of LaFeO3 were carefully investigated using energy dispersive spectroscopy (EDS) and thermogravimetric/differential thermal analysis (TG/DTA). Scanning electron microscopy (SEM) analysis indicates the formation of well-organized microspheres with an average diameter of 2-4 mu m and transmission electron microscopy (TEM) images reveal LaFeO3 nanoparticles with an average size of 85 nm, which agrees well with the size obtained from XRD. A subsequent plausible formation mechanism of LaFeO3 microspheres has been explained in accordance with the Ostwald ripening process. The band gap energy was found to be 2.1 eV using UV-Vis diffuse reflectance spectrum. Furthermore, the photodegradation of Rhodamine B (RhB) in aqueous solution under visible-light illumination was evaluated. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available