Effect of Sr and Ti substitutions on optical ...
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Article dans une revue scientifique: Article original
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Title :
Effect of Sr and Ti substitutions on optical and photocatalytic properties of Bi1-xSrxFe1-xTixO3 nanomaterials
Author(s) :
Benyoussef, Manal [Auteur]
Saitzek, Sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Rajput, Nitul S. [Auteur]
El Marssi, Mimoun [Auteur]
Jouiad, Mustapha [Auteur]
Saitzek, Sebastien [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Rajput, Nitul S. [Auteur]
El Marssi, Mimoun [Auteur]
Jouiad, Mustapha [Auteur]
Journal title :
Nanoscale Advances
Abbreviated title :
Nanoscale Adv.
Volume number :
5
Pages :
869-878
Publisher :
Royal Society of Chemistry (RSC)
Publication date :
2022-12-28
ISSN :
2516-0230
HAL domain(s) :
Chimie/Matériaux
Chimie/Chimie inorganique
Chimie/Chimie inorganique
English abstract : [en]
The potential use of down-sized BFO-xSTO systems (x ≤ 25%) as highly efficient photoanodes for photocatalytic water splitting is investigated. BFO-xSTO is prepared by a solid-state method and subsequently deposited by spray ...
Show more >The potential use of down-sized BFO-xSTO systems (x ≤ 25%) as highly efficient photoanodes for photocatalytic water splitting is investigated. BFO-xSTO is prepared by a solid-state method and subsequently deposited by spray coating. The compounds possess rhombohedral symmetry for x ≤ 15% and phase coexistence for x > 15%, as demonstrated by Raman spectroscopy and transmission electron microscopy. Our findings revealed a drastic grain size decrease with increasing STO content, namely 260 nm for BFO to 50 nm for BFO with 25% STO. Moreover, BFO-xSTO, x > 10% exhibited high optical absorption (> 80%) in the full spectrum and interestingly a very promising band alignment with water redox potentials. Moreover, the photochemical measurements revealed a photocurrent density of ∼0.17 μA cm−2 achieved for x = 15% at 0 bias. Using DFT calculations, the substitution effects on the electronic, optical, and photocatalytic performances of the BFO system were investigated and quantified. Surprisingly, a high hydrogen yield (∼191 μmol g−1) was achieved by BFO-12.5%STO compared to 1 μmol g−1 and 57 μmol g−1 for BFO and STO, respectively. This result highlights the beneficial effects of both the downsizing and substitution of BFO on the photocatalytic water splitting and hydrogen production performances of Bi1−xSrxFe1−xTixO3 systems.Show less >
Show more >The potential use of down-sized BFO-xSTO systems (x ≤ 25%) as highly efficient photoanodes for photocatalytic water splitting is investigated. BFO-xSTO is prepared by a solid-state method and subsequently deposited by spray coating. The compounds possess rhombohedral symmetry for x ≤ 15% and phase coexistence for x > 15%, as demonstrated by Raman spectroscopy and transmission electron microscopy. Our findings revealed a drastic grain size decrease with increasing STO content, namely 260 nm for BFO to 50 nm for BFO with 25% STO. Moreover, BFO-xSTO, x > 10% exhibited high optical absorption (> 80%) in the full spectrum and interestingly a very promising band alignment with water redox potentials. Moreover, the photochemical measurements revealed a photocurrent density of ∼0.17 μA cm−2 achieved for x = 15% at 0 bias. Using DFT calculations, the substitution effects on the electronic, optical, and photocatalytic performances of the BFO system were investigated and quantified. Surprisingly, a high hydrogen yield (∼191 μmol g−1) was achieved by BFO-12.5%STO compared to 1 μmol g−1 and 57 μmol g−1 for BFO and STO, respectively. This result highlights the beneficial effects of both the downsizing and substitution of BFO on the photocatalytic water splitting and hydrogen production performances of Bi1−xSrxFe1−xTixO3 systems.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois
CNRS
Centrale Lille
ENSCL
Univ. Artois
Collections :
Research team(s) :
Couches minces & nanomatériaux (CMNM)
Submission date :
2023-05-30T15:07:29Z
2023-06-22T12:12:46Z
2023-06-22T12:12:46Z
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