Studies on the multiferroic properties of (Zr, Cu) co-doped BiFeO3 prepared by sol–gel method

Priya, A. Sathiya; Banu, I. B. Shameem; Anwar, M.; Hussain, Shamima

doi:10.1007/s10971-016-4144-7

Cited by 16 publications

(8 citation statements)

References 32 publications

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“…The precursors required and the preparation methods have been reported earlier [43]. The XRD analysis has confirmed wellcrystallized single-phase rhombohedral structure (space group R3c) for all the compositions as reported in [43]. It has also been observed that the crystal structure has not been distorted due to (Zr, Cu) co-doping of BFO.…”

Section: Experimental Methodssupporting

confidence: 66%

“…Here, Zr concentration at Bi site is varied in steps of 0.01 whereas Cu concentration at Fe site is maintained as 0.02. The precursors required and the preparation methods have been reported earlier [43]. The XRD analysis has confirmed wellcrystallized single-phase rhombohedral structure (space group R3c) for all the compositions as reported in [43].…”

Section: Experimental Methodssupporting

confidence: 63%

“…In the present work, we have chosen Zr and Cu ions, respectively, to substitute for Bi and Fe ions in bismuth ferrite ceramics synthesized by sol-gel method. The structural ferroelectric, ferromagnetic, and magnetoelectric behaviors of Zr-and Cu-doped BFO have been discussed in detail in a previous publication [43]. Here, we report the influence of co-doping on the frequency-dependent dielectric response, impedance, and optical properties of BFO.…”

Section: Introductionmentioning

confidence: 66%

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Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

Priya

Geetha

2020

Braz J Phys

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Section: Experimental Methodssupporting

confidence: 66%

Section: Experimental Methodssupporting

confidence: 63%

Section: Introductionmentioning

confidence: 66%

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Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

Priya

Geetha

2020

Braz J Phys

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“…Hence, in this report, doping an isovalent Er 3+ ion at Bi site and aliovalent TM = Nb 5+ , Mn 4+ and Mo 4+ at Fe site were undertaken to investigate the influence on the multiferroic nature of BFO due to these dual combination. In our previous works, we observed that 5% RE at Bi site and 2% of TM at Fe site doping in BFO resulted in the highest enhancement of magnetelectric coupling when compared to 1%, 2%, 3% and 4% of RE at Bi site. So, in the present work, we have considered only the 5% of RE doping at Bi site.…”

Section: Introductionmentioning

confidence: 82%

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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“…A good way to improve photocatalytic activity is through the incorporation of dopant into TiO2 lattices, introducing additional energy levels and defects into the microstructure of the TiO2 [4]. There are different modification techniques to reduce band gap; these include doping with noble metals like Au, Ag and Pt [5-9], non-precious metals such as Fe, Cu, Cr, Mn, W, Ru, Ni, Sb [10][11][12][13][14], oxides such as ZnO,ZrO2, and non-metallic elements like N, C, S, F and P [17][18][19]. Zirconium ions, which act as a kind of dopant in TiO2, have been found to modify the photocatalytic activity and stabilization of anatase phase at high temperatures [20][21][22].…”

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confidence: 99%

Evaluating the Efficiency of a Trace Amount of Zr Dopant on Photocatalytic Activity of TiO2 in Decolorization of Azo Dye

Bigdeli

Dehaghi

2018

ESJ

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Zr-doped TiO2 nano photocatalyst obtained with a various trace amount of Zr, by using the sol-gel method. Several spectroscopic techniques applied to characterize the structures and properties of nanophotocatalyst. It founded that the effect of doping Zr ions to the TiO2 lattice led it to improve the surface properties and decreasing the particle size of nano-photocatalyst. Therefore, it causes increasing specific surface area and photocatalytic activity as compared with pure TiO2. The results revealed that there was an inverse relationship between the growth of the crystallite size of the nano photocatalyst and the decline of the molar ratios of Zr. The photocatalytic activity of the nano photocatalyst employed for the decolorization of Congo red as an Azo dye in the aqueous solution under UV irradiation in a batch reactor. The results exhibited that the TiO2/Zr0.0004 brings the best photocatalytic activity. Keywords:TiO2/Zr Nanocomposite; Decolorization; Sol-Gel; UV Irradiation; Congo Red; Spectroscopic Techniques. Article History: Received: 05 February 2018Accepted: 24 May 2018 1-IntroductionOne of the most important sources of environmental contamination is dye pollution. Heterogeneous photocatalysis is an interesting method employed for the thorough removal of pollution under solar or artificial light irradiation [1-2]. TiO2 based photocatalysis enjoys such advantages as low cost, non-toxicity and chemical stability, making it as a good choice for the efficient oxidization and degradation of dye pollutants [3]. It has been shown that photon absorption of anatase TiO2 is only limited to the UV range due to its large band gap (3.2ev) [2]. A good way to improve photocatalytic activity is through the incorporation of dopant into TiO2 lattices, introducing additional energy levels and defects into the microstructure of the TiO2 [4]. There are different modification techniques to reduce band gap; these include doping with noble metals like Au, Ag and Pt [5-9], non-precious metals such as Fe, Cu, Cr, Mn, W, Ru, Ni, Sb [10][11][12][13][14], oxides such as ZnO,ZrO2, and non-metallic elements like N, C, S, F and P [17][18][19]. Zirconium ions, which act as a kind of dopant in TiO2, have been found to modify the photocatalytic activity and stabilization of anatase phase at high temperatures [20][21][22]. Many different methods have been proposed for the preparation of Zr-doped TiO2 nanocomposites; these are such as mechanochemical doping, co-precipitation, chemical vapor deposition and sol-gel methods. However, it must be noted that most of the above-mentioned techniques are time consuming and require expensive equipment. The sol-gel method has the unique advantage that it can synthesize at low temperature, under high purity and easily controlled reaction condition [23][24], its simplicity and possibility of the synthesis of nano photocatalyst at low temperature with high purity [25]. Recently, according to properties of Zr, TiO2 was used with specific molar ratios of Zr for different applications [26].In this...

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Studies on the multiferroic properties of (Zr, Cu) co-doped BiFeO3 prepared by sol–gel method

Cited by 16 publications

References 32 publications

Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

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

Evaluating the Efficiency of a Trace Amount of Zr Dopant on Photocatalytic Activity of TiO2 in Decolorization of Azo Dye

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Studies on the multiferroic properties of (Zr, Cu) co-doped BiFeO3 prepared by sol–gel method

Cited by 16 publications

References 32 publications

Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

Impact of (Zr, Cu) Ion Substitution on the Optical, Dielectric, and Impedance Behavior of BiFeO3

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

Evaluating the Efficiency of a Trace Amount of Zr Dopant on Photocatalytic Activity of TiO2 in Decolorization of Azo Dye

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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