Effect of co-doping on the optical, magnetic and photocatalytic properties of the Gd modified BiFeO3

Vanga, Pradeep Reddy; Mangalaraja, R.V.

doi:10.1007/s10854-016-4481-x

Cited by 24 publications

(12 citation statements)

References 35 publications

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“…The reason may be ascribed to the reduction of traps in BEFNO and also the hopping of charges between Fe 3+ and Fe 2+ ions would have got suppressed more on doping Nb 5+ ion at Fe site. This result is also supported by ferroelectric studies of the Nb doped samples . The low quantum of leakage current and enhanced ferroelectric behavior of BEFNO are in good concordance.…”

Section: Resultssupporting

confidence: 74%

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Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Lakshmi

Banu

2019

Int J Applied Ceramic Tech

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Single phase multiferroic undoped BiFeO 3 notoriously suffers due to the poor spincharge coupling resulting in limitations to device applications. The present work focuses on the tailoring of its multiferroic and magnetoelectric coupling properties by synthesizing multiferroic Bi 0.95 Er 0.05 Fe 0.98 TM 0.02 O 3 (TM = Nb, Mn and Mo) ceramics. The ferroelectric, magnetic, current leakage measurements and magnetoelectric effect were investigated. XRD along with the Reitveld refinement results confirms that all the samples possess perovskite based rhombohedral structure and reveals that doping of (Er, Nb), (Er, Mn) and (Er, Mo) induced the crystallographic distortion in the BFO lattice and hence induced a variation in the bond lengths and bond angle.Dual doping significantly enhanced the electrical, magnetic properties and magnetoelectric coupling as compared to BiFeO 3 . Doping has lowered the leakage current by three to four orders compared to BFO. The lattice distortion, reduced leakage current and destruction of spin-cycloidal structure could be the origin for these improved features. The (Er, Nb) doped BiFeO 3 yields enhanced ferroelectric character with the maximum polarization value of 0.46 µC/cm 2 , maximum ME coupling of 0.22 mV/ cm at a magnetic field of 130 G, an improved magnetization with a remanance value of 0.0903 emu/g and the lowest leakage current density. K E Y W O R D Sco-doped BiFeO 3 , current leakage density, magnetoelectric effect, multiferroic ceramics, Reitveld refinement, Spin-spiral structure

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Section: Resultssupporting

confidence: 74%

“…The figure reveals that prominent XRD peaks of rhombohedral crystal structure such as (012), (104) and (110) are present for all the samples in accordance with JCPDS data card no. (86‐1518) . This confirms that the crystal structure of all the doped samples are in pervoskite based rhombohedral structure (space group R3c).…”

Section: Resultssupporting

confidence: 71%

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Lakshmi

Banu

2019

Int J Applied Ceramic Tech

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“…However, the photocatalytic performance of bare BiFeO 3 is not satisfactory owing to high recombination rate of photogenerated electronhole pairs, and this shortage limits its practical applications in the field of photocatalysis. Therefore, many strategies have been employed to suppress the recombination of photoinduced charges [13][14][15][16][17][18][19] . Among these methods, coupling BiFeO 3 with narrow-bandgap semiconductor of suitable band potential including BiVO 4 , Ag/AgCl, Fe 2 O 3 and Bi 2 Fe 4 O 9 is demonstrated to be an efficient way to promote photogenerated charges migration and separation, and then improve its photocatalytic activity [16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Yang

Tang

et al. 2018

Mat. Res.

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In this work, the g-C 3 N 4 nanoparticles decorated BiFeO 3 microspheres composites (g-C 3 N 4 / BiFeO 3 ) were successfully synthesized by hydrothermal treatment of g-C 3 N 4 nanoparticles together with BiFeO 3 microspheres. The SEM and HRTEM observation indicate that the C 3 N 4 nanoparticles with size of 30-50 nm are well decorated on the surface of BiFeO 3 microspheres. The photocatalytic activities of the samples are investigated by the degradation of methylene blue (MB) under the irradiation of simulated sunlight. The as-prepared g-C 3 N 4 /BiFeO 3 composites exhibit remarkable enhanced photocatalytic activity compared with bare BiFeO 3 . More importantly, the photocataltic performance of the composites is further confirmed by the degradation of colorless phenol. Furthermore, the favorable catalytic stability of composites is demonstrated through the recycling photocatalytic experiment. The enhanced photocatalytic activity of g-C 3 N 4 /BiFeO 3 composites is mainly attributed to the separation of the photogenerated electron-hole pairs, resulting from the migration of the photoinduced charge between g-C 3 N 4 nanoparticles and BiFeO 3 . A possible photocatalytic mechanism for dye degradation over g-C 3 N 4 /BiFeO 3 composite is proposed based on the active species trapping experiment, revealing that the photogenerated hole (h + ) and hydrogen peroxide (H 2 O 2 ) are regarded as the major active species for the decomposition of dye, while hydroxyl radicals (•OH) plays a minor role in the photocatalytic reaction.

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“…Moreover, the light response range of BiFeO 3 needs to be further extended to NIR light region for effective utilization of sunlight energy. Therefore, many strategies have been used to overcome these shortcomings [35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Photo-Fenton Degradation of AO7 and Photocatalytic Reduction of Cr(VI) over CQD-Decorated BiFeO3 Nanoparticles Under Visible and NIR Light Irradiation

Tang

Sun

et al. 2019

Nanoscale Res Lett

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In this work, the carbon quantum dot (CQD)-decorated BiFeO 3 nanoparticle photocatalysts were prepared by a hydrothermal method. The TEM observation and XPS characterization indicate that the CQDs are well anchored on the surface of BiFeO 3 nanoparticles. Acid orange 7 (AO7) and hexavalent chromium (Cr(VI)) were chosen as the model pollutants to investigate the photocatalytic/photo-Fenton degradation and photocatalytic reduction performances of the as-prepared CQD/BiFeO 3 composites under visible and near-infrared (NIR) light irradiation. Compared with bare BiFeO 3 nanoparticles, the CQD/BiFeO 3 composites exhibit significantly improved photocatalytic and photo-Fenton catalytic activities. Moreover, the composites possess good catalytic stability. The efficient photogenerated charges separation in the composites was demonstrated by the photocurrent response and electrochemical impedance spectroscopy (EIS) measurements. The main active species involved in the catalytic degradation reaction were clarified by radicals trapping and detection experiments. The underlying photocatalytic and photo-Fenton mechanisms are systematically investigated and discussed.

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Effect of co-doping on the optical, magnetic and photocatalytic properties of the Gd modified BiFeO3

Cited by 24 publications

References 35 publications

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Photo-Fenton Degradation of AO7 and Photocatalytic Reduction of Cr(VI) over CQD-Decorated BiFeO3 Nanoparticles Under Visible and NIR Light Irradiation

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Effect of co-doping on the optical, magnetic and photocatalytic properties of the Gd modified BiFeO3

Cited by 24 publications

References 35 publications

Tailoring the multiferroic properties of BiFeO3 by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO3 by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Enhanced Photocatalytic Degradation Activity of BiFeO3 Microspheres by Decoration with g-C3N4 Nanoparticles

Photo-Fenton Degradation of AO7 and Photocatalytic Reduction of Cr(VI) over CQD-Decorated BiFeO3 Nanoparticles Under Visible and NIR Light Irradiation

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Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site