Stable single phases of samarium gallium oxide (SmGaO) nano semiconductor self-assembly for supercapacitor and photocatalytic applications
A cutting-edge approach has been attempted in the present work to develop two stable phases of samarium gallium oxide as functional materials in the form of energy storage electrodes and photocatalysts. A novel samarium gallium oxide with two stable phases has been synthesized by the gel matrix meth...
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Published in | Dalton transactions : an international journal of inorganic chemistry Vol. 52; no. 16; pp. 5366 - 5382 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
Royal Society of Chemistry
25.04.2023
|
Subjects | |
Online Access | Get full text |
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Summary: | A cutting-edge approach has been attempted in the present work to develop two stable phases of samarium gallium oxide as functional materials in the form of energy storage electrodes and photocatalysts. A novel samarium gallium oxide with two stable phases has been synthesized by the gel matrix method. Their crystallinity, phase purity, and surface morphology were studied using modern analytical instruments,
viz.
, XRD, Raman spectra, FESEM, TEM, XPS, and UV-visible spectra. The values of the band gap energy calculated using Tauc relation for Sm
3
Ga
5
O
12
and Sm
3
GaO
6
are 5.06 eV and 4.74 eV, respectively. The electrodes fabricated from Sm
3
Ga
5
O
12
and Sm
3
GaO
6
exhibit values of specific capacitances of 91.95 mA h g
−1
and 103.89 mA h g
−1
, respectively, at 1 A g
−1
current density. Among the two stable phases, Sm
3
GaO
6
shows significant cycling stability with a capacitive retention of 82.65% over 5000 charge/discharge cycles. The prepared asymmetric supercapacitor with Sm
3
GaO
6
as an active material exhibits an improved energy and power density of 11.72 W h kg
−1
and 312.5 W kg
−1
, respectively, with a coulombic efficiency of 97.17% after 5000 cycles. The results obtained from photocatalytic studies infer that the methylene blue dye was efficiently degraded by Sm
3
Ga
5
O
12
and Sm
3
GaO
6
with 92% and 97%, respectively, within 120 min of light irradiation. Sm
3
GaO
6
functions as a better and more efficient photocatalyst for degrading methylene blue dye, with a higher efficiency and a higher degradation rate of 0.0273 min
−1
. The results obtained from electrochemical and photocatalytic studies infer that both phases of samarium gallium oxide can be considered as potential materials for energy storage and environmental remediation applications.
A cutting-edge approach has been attempted in the present work to develop two stable phases of samarium gallium oxide as functional materials in the form of energy storage electrodes and photocatalysts. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/d3dt00261f |