Study of Optical and Structural Characteristics of Ceria Nanoparticles Doped with Negative and Positive Association Lanthanide Elements
Joint Authors
Shehata, N.
Meehan, K.
Hudait, M.
Jain, N.
Gaballah, S.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-11-30
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This paper studies the effect of adding lanthanides with negative association energy, such as holmium and erbium, to ceria nanoparticles doped with positive association energy lanthanides, such as neodymium and samarium.
That is what we called mixed doped ceria nanoparticles (MDC NPs).
In MDC NPs of grain size range around 6 nm, it is proved qualitatively that the conversion rate from Ce4+ to Ce3+ is reduced, compared to ceria doped only with positive association energy lanthanides.
There are many pieces of evidence which confirm the obtained conclusion.
These indications are an increase in the allowed direct band gap which is calculated from the absorbance dispersion measurements, a decrease in the emitted fluorescence intensity, and an increase in the size of nanoparticles, which is measured using both techniques: transmission electron microscope (TEM) and X-ray diffractometer (XRD).
That gives a novel conclusion that there are some trivalent dopants, such as holmium and erbium, which can suppress Ce3+ ionization states in ceria and consequently act as scavengers for active O-vacancies in MDC.
This promising concept can develop applications which depend on the defects in ceria such as biomedicine, electronic devices, and gas sensors.
American Psychological Association (APA)
Shehata, N.& Meehan, K.& Hudait, M.& Jain, N.& Gaballah, S.. 2014. Study of Optical and Structural Characteristics of Ceria Nanoparticles Doped with Negative and Positive Association Lanthanide Elements. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1041478
Modern Language Association (MLA)
Shehata, N.…[et al.]. Study of Optical and Structural Characteristics of Ceria Nanoparticles Doped with Negative and Positive Association Lanthanide Elements. Journal of Nanomaterials No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1041478
American Medical Association (AMA)
Shehata, N.& Meehan, K.& Hudait, M.& Jain, N.& Gaballah, S.. Study of Optical and Structural Characteristics of Ceria Nanoparticles Doped with Negative and Positive Association Lanthanide Elements. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1041478
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041478