Open Access3D multilayered Bi 4 O 5 Br 2 nanoshells displaying excellent visible light photocatalytic degradation behaviour for resorcinol
Author(s) -
Hu Hanmei,
Xu Juanjuan,
Deng Chonghai,
Wang Man,
Zhou Xiaoyu,
Le Huirong
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0886
Subject(s) - nanoshell , photocatalysis , transmission electron microscopy , materials science , calcination , visible spectrum , high resolution transmission electron microscopy , scanning electron microscope , monoclinic crystal system , analytical chemistry (journal) , nanoparticle , nanotechnology , chemistry , crystallography , optoelectronics , catalysis , crystal structure , chromatography , organic chemistry , composite material
High‐ordered three‐dimensional multilayered Bi 4 O 5 Br 2 nanoshells have been fabricated successfully via a green ultrasound‐assisted anion exchange reaction followed by a calcination treatment approach. The products are characterised by X‐ray diffraction, field‐emission scanning electron microscopy, transmission electron microscopy, high‐resolution transmission electron microscopy, UV–vis diffuse reflectance spectrum and N 2 adsorption/desorption isotherms. The results reveal that ternary Bi 4 O 5 Br 2 nanoshells possess a pure monoclinic phase with the average thickness of ca. 12 nm, and the walls are of 10–12 layers constructed by nanograins with 10 nm in size. The specific surface is measured to be 36.18 m 2 g ‐1 and the band gap energy E g value is calculated to be 2.52 eV. The possible formation process for Bi 4 O 5 Br 2 nanoshells is simply proposed. According to the photocatalytic degradation for resorcinol under visible light irradiation, the as‐prepared Bi 4 O 5 Br 2 nanoshells exhibit excellent photocatalytic performance, which is not only far beyond the degradation rate of BiOBr precursor nanosheets but also superior to that of other reported Bi 4 O 5 Br 2 architectures, suggesting a practical application for the treatment of organic pollutants.