Title
Surface Na2CO3 etching induced activity enhancement of 2D BiOI photocatalyst working under visible light
Author
Lei Lianga, Jing Cao, Haili Lin, Shifu Chen
Year
2017
Journal
Science Bulletin
Abstract
The visible light photocatalytic activity of two-dimensional (2D) BiOI microplates was intensively enhanced through simply dipping in Na2CO3 solutions at room temperature. The X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) investigations suggest that little amount of (BiO)2CO3 phase was formed on the surface of 2D BiOI via the in-situ chemical conversion. The concentration of Na2CO3 solutions affected the structure, morphology, light absorption and surface element component of 2D BiOI. The surface loaded (BiO)2CO3 mainly trapped the photoinduced electrons of BiOI, improved the separation efficiency of photocharges and finally raised the photocatalytic activity of BiOI under visible light (λ>420 nm). Furthermore, the product of the as-prepared (BiO)2CO3/BiOI displayed excellent stability in the repeated experiment. This study provides a facile to improve the photocatalytic activity of BiOX (X= Cl, Br, I) by means of surface treatment with Na2CO3 solutions.
Instrument
FP-8300
Keywords
Fluorescence, Photoluminescence, Materials