Facile synthesis of ring-like α-Fe2O3 assembly composed of small hematite particles for highly efficient photocatalysis

• Published in: Journal of materials science. Materials in electronics Vol. 29; no. 4; pp. 2610 - 2617
• Main Authors: Yan, Xiaole, Wu, Yiduo, Li, Dingding, Luo, Cuixian, Wang, Ying, Hu, Jie, Li, Gang, Li, Pengwei, Jiang, Huabei, Zhang, Wendong
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2018
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Optical and Electronic Materials
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-8186-6

A new-type of ring-like α-Fe 2 O 3 assembly were prepared via facile top-down etching method from hematite saucer-like nanocrystals composed of small α-Fe 2 O 3 particles. HRTEM and BET results demonstrated that the ring-like α-Fe 2 O 3 assembly has zigzag edge and high specific surface area, which leads to higher efficient visible-light photocatalytic performance on the degradation of cationic dye Rhodamine B (RhB). UV–Vis diffuse reflectance spectra and photocurrent responses demonstrated a narrow bandgap and higher photocurrent response of ring-like α-Fe 2 O 3 assembly, which were helpful for absorbing photons and restraint of recombination for photogenerated charges. These characters make them the promising candidates for photocatalysis.