Mono-, Di-, and Tri-Valent Cation Doped BiFe_(0.95)Mn_(0.05)O_3 Nanoparticles: Ferroelectric Photocatalysts

Astita Dubey; Chin Hon Keat; Vladimir V. ShvartsmanKirill V. YusenkoMarianela Escobar CastilloAna Guilherme BuzanichUlrich HagemannSergey A. KovalenkoJulia StaehlerDoru C. Lupascu

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Mono-, Di-, and Tri-Valent Cation Doped BiFe_(0.95)Mn_(0.05)O_3 Nanoparticles: Ferroelectric Photocatalysts

机译：Mono-, Di-, and Tri-Valent Cation Doped BiFe_(0.95)Mn_(0.05)O_3 Nanoparticles: Ferroelectric Photocatalysts

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The ferroelectricity of multivalent codoped Bismuth ferrite (BiFeO_3; BFO)nanoparticles(NPs) is revealed and utilized for photocatalysis, exploitingtheir narrow electronic bandgap. The photocatalytic activity of ferroelectricphotocatalystsBiFe_(0.95)Mn_(0.05)O_3 (BFM) NPs and mono-, di-, or tri-valentcations (Ag~+, Ca~(2+), Dy~(3+); MDT) coincorporated BFM NPs are studied underultrasonication and in acidic conditions. It is found that such dopingenhances the photocatalytic activity of the ferroelectric NPs approximatelythree times. The correlation of the photocatalytic activity with structural,optical, and electrical properties of the doped NPs is established. Theincrease of spontaneous polarization by the mono- and tri-valent doping isone of the major factors in enhancing the photocatalytic performance alongwith other factors such as stronger light absorption in the visible range,low recombination rate of charge carriers, and larger surface area of NPs.A-site doping of BFO NPs by divalent elements suppresses the polarization,whereas trivalent (Dy~(3+)) and monovalent (Ag+) cations provide an increaseof polarization. The depolarization field in these single domain NPs acts as adriving force to mitigate recombination of the photoinduced charge carriers.

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《Advanced functional materials》 |2022年第43期|2207105.1-2207105.16|共16页
作者
Astita Dubey; Chin Hon Keat; Vladimir V. ShvartsmanKirill V. YusenkoMarianela Escobar CastilloAna Guilherme BuzanichUlrich HagemannSergey A. KovalenkoJulia StaehlerDoru C. Lupascu;
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Institute for Materials Science and Center for NanointegrationDuisburg-Essen (CENIDE)University of Duisburg-EssenUniversitaetsstr. 15, 45141 Essen, Germany;

Federal Institute for Materials Reserach in Testing (BAM)Division Structure AnalysisRichard-Willstaetter-Str. 11, 12489 Berlin, Germany;

Interdisciplinary Center for Analytics on the Nanoscale (ICAN) andCenter for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenLotharstr. 1-21, 47057 Duisburg, GermanyDepartment of ChemistryHumboldt Universitaet zu BerlinBrook-Taylor-Str. 2, 12489 Berlin, Germany;

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bismuth ferrite; ferroelectric; nanoparticles; photocatalysis; piezoresponse; polarization;

Mono-, Di-, and Tri-Valent Cation Doped BiFe_(0.95)Mn_(0.05)O_3 Nanoparticles: Ferroelectric Photocatalysts

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