Preparation of high-quality BiFeO3 nanopowders via a polyacrylamide gel route

Tang, Xian; Yang, Haibo; Shen, Xi; Jiang, J. L.; Wei, Zhiqiang; Feng, Wenfang

doi:10.1016/j.jallcom.2009.02.068

Cited by 93 publications

(38 citation statements)

References 27 publications

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“…The typical adsorption peak for the C=N stretching vibration is detected at ~1644 cm -1 . As to the spectrum of bare BiFeO 3, the obvious absorption peaks located at around 440 and 560 cm -1 are attributed to the Fe-O stretching and bending vibrations, respectively 31 . For the g-C 3 N 4 /BiFeO 3 composites, all the characteristic adsorption peaks of g-C 3 N 4 nanoparticles and BiFeO 3 can be observed.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 96%

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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Section: Morphology and Structure Characterizationmentioning

confidence: 96%

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

Yang

Tang

et al. 2018

Mat. Res.

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“…BiFeO 3 is antiferromagnetic with the Néel temperature T N & 370°C and ferroelectric with the Curie temperature T C & 830°C [1,2]. These excellent properties make BiFeO 3 suitable for applications in radio, television, microwave and satellite communication, bubble memory devices, audio-video, sensors, optical filters, smart devices, high-density ferroelectric random access memory and digital recording fields [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of synthesis conditions on the preparation of BiFeO3 nanopowders using two different methods

Rashad

2011

J Mater Sci: Mater Electron

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Bismuth orthoferrite (BiFeO 3 ) nanoparticles have been synthesized via the co-precipitation and the oxalate precursor methods. Effects of Bi source, annealing temperature, Bi/Fe molar ratio, oxalic acid ratio and Mn 2? ion on the crystal structure, crystallite size, microstructure and magnetic properties of the produced powders were systematically studied. The results revealed that bismuth oxychloride and iron oxide were formed using chlorides sources. A single phase of BiFeO 3 was formed from asmade samples with Bi/Fe molar ratio 1.1 using nitrate sources and annealed at 500 and 600°C for 2 h via the two pathways. The pure BiFeO 3 phase appeared as spherical and pseudocubic-like structure using the co-precipitation and the oxalic acid precursor routes, respectively. A high saturation magnetization (3.94 emu/g) was achieved for powder formed from the oxalate precursor route with Bi/Fe molar ratio 1.0 annealed at 600°C for 2 h as the result of the formation of Bi 25 FeO 39 . Moreover, Mn 2? ion addition affected BiFeO 3 properties due to the formation of Bi 2 Fe 2 Mn 2 O 10 . Hence, the saturation magnetization and the coercive force of BiFeO 3 were improved substantially by substitution of Mn 2? ions (BiFe 1-X Mn X O 3 , X = 0.1-0.2).

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“…Various methods, besides the conventional one [23], were used for material synthesis in bulk and nanopowder forms, such as solgel [24][25][26][27], molten alkali metal nitrates [28], solvothermal [29], hydrothermal [30], and rapid liquid phase sintering [20].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Bi_0.9M_0.05N_0.05FeO₃(M = Sm, Gd; N = Sr, Y) polycrystalline multiferroic compounds

Al-Haj

2010

Cryst. Res. Technol.

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FeO 3 were prepared by the conventional ceramic method and were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometry, and differential scanning calorimetry. The compounds were found to have the rhombohedral perovskite-like structure, accompanied by the existence of small amounts of Bi 2 Fe 4 O 9 and Bi 25 FeO 40 impurity phases. The appearance of weak ferromagnetism in Bi 0.9 Gd 0.05 Sr 0.05 FeO 3 and Bi 0.9 Sm 0.05 Sr 0.05 FeO 3 is due to partial destruction of the spiral spin structure due to lattice distortion and oxygen vacancies. The magnetic transition temperatures of the compounds are 360 °C and 355 °C, respectively.

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Preparation of high-quality BiFeO3 nanopowders via a polyacrylamide gel route

Cited by 93 publications

References 27 publications

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

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

Effect of synthesis conditions on the preparation of BiFeO3 nanopowders using two different methods

Preparation and characterization of Bi_0.9M_0.05N_0.05FeO₃(M = Sm, Gd; N = Sr, Y) polycrystalline multiferroic compounds

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Preparation of high-quality BiFeO3 nanopowders via a polyacrylamide gel route

Cited by 93 publications

References 27 publications

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

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

Effect of synthesis conditions on the preparation of BiFeO3 nanopowders using two different methods

Preparation and characterization of Bi0.9M0.05N0.05FeO3(M = Sm, Gd; N = Sr, Y) polycrystalline multiferroic compounds

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Preparation and characterization of Bi_0.9M_0.05N_0.05FeO₃(M = Sm, Gd; N = Sr, Y) polycrystalline multiferroic compounds