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- Title
Bi<sub>2</sub>O<sub>3</sub>-Bi<sub>2</sub>WO<sub>6</sub> 直接Z-scheme异质结的制备、 表征及光催化还原U(VI)的性能.
- Authors
李小燕; 何登武; 李冠超; 王杨; 曹小岗; 刘义保
- Abstract
According to the energy band theory, Bi(NO3)3·5H2O was used as bismuth source to synthesize Bi2O3Bi2O6 composite photocatalyst materials by hydrothermal calcination. The samples were characterized by means of SEM, XRD, XPS, DRS and EIS, respectively, and the photocatalytic activity was assessed in terms of reduction of U(VI) under visible light irradiation. The results show that the prepared Bi2O3-Bi2O6composite materials exhibit enhanced photocatalytic performance for the photo-reduction of U(VI) than the pure Bi2O3, the optimized photocatalytic efficiency for U(VI) is achieved when the mole ratios of Bi2O3 to Bi2O3 is 2.4∶1. The improved photocatalytic activity is ascribed to the direct Z-scheme heterojunction between Bi2O3 and BBi2O3, resulting in the rapid interfacial transfer of photoelectron-hole and wide light response range. This work provides a new idea to design and synthesize the photocatalysts with high visible light activity and understand the enhanced photocatalytic reduction mechanism of U(VI).
- Subjects
ENERGY-band theory of solids; VISIBLE spectra; COMPOSITE materials; PHOTOCATALYSTS; PHOTOREDUCTION; HETEROJUNCTIONS; BISMUTH
- Publication
Acta Materiae Compositae Sinica, 2021, Vol 38, Issue 8, p2646
- ISSN
1000-3851
- Publication type
Article
- DOI
10.13801/j.cnki.fhclxb.20201111.004