Synthesis and characterization of porous BiFeO3 nanoparticles via a Pluronic P123-assisted sol-gel method

Author

Song, Juyue ; Jin, Dengren ; Yan, Xiaolong ; Yu, Shengwen ; Cheng, Jinrong

Author_Institution

Sch. of Materal Sci. & Eng., Shanghai Univ., Shanghai, China

fYear

2009

fDate

23-27 Aug. 2009

Firstpage

1

Lastpage

5

Abstract

Porous BiFeO₃ nanoparticles were synthesized via sol-gel method in the presence of block copolymer Pluronic P123 surfactant. X-ray diffraction results showed that the nanoparticles were of single perovskite phase. Transmission electron microscopy images revealed that the porous BiFeO₃ nanoparticles could only be synthesized at a lower calcining temperature in the range of 400-450degC. Nitrogen absorption-desorption isotherms suggested that the mesopores were aggregated pores which were formed by the aggregation of small primary particles. Bandgap value of 2.01 eV derived from UV-vis spectrum indicated that BiFeO₃ was a potential candidate for visible-light photocatalytic applications. The photocatalytic property of the porous BiFeO₃ nanoparticles were investigated by the photodegradation of methyl orange. The porous powders exhibited better catalytic activity than the nonporous ones.

Keywords

X-ray diffraction; aggregation; bismuth compounds; calcination; catalysis; desorption; energy gap; nanofabrication; nanoparticles; nitrogen; photochemistry; porous materials; sol-gel processing; transmission electron microscopy; ultraviolet spectra; visible spectra; BiFeO₃; N₂; Pluronic P123-assisted sol-gel method; UV-visible spectrum; X-ray diffraction; absorption-desorption isotherms; aggregation; bandgap; block copolymer surfactant; calcining temperature; photocatalytic property; photodegradation; porous nanoparticle synthesis; single perovskite phase; sol-gel method; temperature 400 C to 450 C; transmission electron microscopy; Calcination; Mesoporous materials; Nanoparticles; Nitrogen; Photonic band gap; Powders; Temperature distribution; Transmission electron microscopy; X-ray diffraction; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the

Conference_Location

Xian

ISSN

1099-4734

Print_ISBN

978-1-4244-4970-5

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2009.5307613

Filename

5307613