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Issue 113, 2015
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In situ construction of α-Bi2O3/g-C3N4/β-Bi2O3 composites and their highly efficient photocatalytic performances

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Abstract

In this study, α-Bi2O3/g-C3N4/β-Bi2O3 composites were constructed by an in situ method in one step from α-Bi2O3 and g-C3N4. It indicates that α-Bi2O3 transformed to β-Bi2O3 when it was calcined together with g-C3N4. The co-existence of α-Bi2O3, g-C3N4 and β-Bi2O3 was proved by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and high-resolution transmission electron microscopy (HRTEM). The energy band structures and optical properties were studied by ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) and valence band X-ray photoelectron spectroscopy (VB-XPS). The in situ formation mechanism of the α-Bi2O3/g-C3N4/β-Bi2O3 composites in one step was studied using the samples’ surface chemical states, which were measured by X-ray photoelectron spectroscopy (XPS). The results show that the surface covered or coordinated g-C3N4 and CO32− which has a promotional effect on the stability of β-Bi2O3 at room temperature. The enhanced photocatalytic activities of the α-Bi2O3/g-C3N4/β-Bi2O3 composites were evaluated by the photocatalytic oxidation of isopropyl alcohol (IPA), and were attributed to the heterojunction formation between β-Bi2O3 and g-C3N4.

Graphical abstract: In situ construction of α-Bi2O3/g-C3N4/β-Bi2O3 composites and their highly efficient photocatalytic performances

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Supplementary files

Article information


Submitted
09 Sep 2015
Accepted
14 Oct 2015
First published
30 Oct 2015

RSC Adv., 2015,5, 92963-92969
Article type
Paper
Author version available

In situ construction of α-Bi2O3/g-C3N4/β-Bi2O3 composites and their highly efficient photocatalytic performances

H. Jiang, G. Liu, T. Wang, P. Li, J. Lin and J. Ye, RSC Adv., 2015, 5, 92963
DOI: 10.1039/C5RA18420G

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