Premium
Self‐Assembled 3D Flowerlike Hierarchical Fe 3 O 4 @Bi 2 O 3 Core–Shell Architectures and Their Enhanced Photocatalytic Activity under Visible Light
Author(s) -
Wang Yang,
Li Shikuo,
Xing Xianran,
Huang Fangzhi,
Shen Yuhua,
Xie Anjian,
Wang Xiufang,
Zhang Jian
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201001846
Subject(s) - ostwald ripening , photocatalysis , superparamagnetism , materials science , composite number , visible spectrum , nanotechnology , microsphere , chemical engineering , shell (structure) , nanoparticle , magnetization , composite material , chemistry , optoelectronics , catalysis , organic chemistry , magnetic field , physics , quantum mechanics , engineering
Three‐dimensional (3D) flowerlike hierarchical Fe 3 O 4 @Bi 2 O 3 core–shell architectures were synthesized by a simple and direct solvothermal route without any linker shell. The results indicated that the size of the 3D flowerlike hierarchical microspheres was about 420 nm and the shell was composed of several nanosheets with a thickness of 4–10 nm and a width of 100–140 nm. The saturation magnetization of the superparamagnetic composite microspheres was about 41 emu g −1 at room temperature. Moreover, the Fe 3 O 4 @Bi 2 O 3 composite microspheres showed much higher (7–10 times) photocatalytic activity than commercial Bi 2 O 3 particles under visible‐light irradiation. The possible formation mechanism was proposed for Ostwald ripening and the self‐assembled process. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning, for example.