Open AccessFormation and catalytic performance of novel colourful BiOI photocatalysts with adjustable bandgap under visible light
Author(s) -
Yang Jian,
Zhang FengJun,
Xie FaZhi,
Xie WenJie,
Hu HanMei,
Zhu Lei,
Oh WonChun
Publication year - 2014
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.2014.0337
Subject(s) - methyl orange , scanning electron microscope , band gap , photocatalysis , catalysis , visible spectrum , materials science , spectroscopy , diffuse reflectance infrared fourier transform , photochemistry , ultraviolet , diffraction , optoelectronics , energy dispersive x ray spectroscopy , ultraviolet visible spectroscopy , optics , chemistry , organic chemistry , physics , composite material , quantum mechanics
A series of novel colourful BiOI photocatalysts have been synthesised by a simple oil bath method at 160°C. Several characterisation tools including X‐ray diffraction, a scanning electron microscope, energy‐dispersive X‐ray spectroscopy and ultraviolet–visible diffuse reflectance spectroscopy were used to study the phase structure, morphologies, bandgap and catalytic performance of the prepared samples. The results show that BiOI exhibited higher photocatalytic efficiency under visible light ( λ > 420 nm) in the degradation of methyl orange. This result could be because of the narrow bandgap, for which E g is about 1.4–2.25 eV, and a number of active positions for catalysts. h + acts as the main active species during methyl orange degradation.