1. Photocatalytic reduction of uranium(VI) by magnetic ZnFe2O4 under visible light.
- Author
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Liang, Peng-liang, Yuan, Li-yong, Deng, Hao, Wang, Xu-cong, Wang, Lin, Li, Zi-jie, Luo, Shi-zhong, and Shi, Wei-qun
- Subjects
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PHOTOREDUCTION , *VISIBLE spectra , *SEWAGE , *ENVIRONMENTAL remediation , *MAGNETIC separation - Abstract
• Visible-light-driven photoreduction of U(VI) is achieved using ZnFe 2 O 4 as catalyst. • 50 ppm of uranium(VI) was almost completely removed in 60 min. • The photocatalytic activity of ZnFe 2 O 4 is dependent on its morphology. • ZnFe 2 O 4 rods own good stability, recyclability and magnetic separability. Visible-light-driven photocatalytic reduction of uranium(VI) is becoming an effective manner to remove uranium(VI) from waste water, whereas applicable catalysts are extremely limited. Herein, we report a first study of visible-light-driven photocatalytic reduction of uranium(VI) using visible light responsive ZnFe 2 O 4. The ZnFe 2 O 4 catalysts with different morphologies were successfully obtained and well characterized. The photoreduction of uranium(VI) under visible light was achieved over these ZnFe 2 O 4 samples with the activity order of rods > microspheres > nanoparticles. Using ZnFe 2 O 4 rods, for example, the 50 ppm of uranium(VI) was almost completely removed in 60 min, representing one of the most effective visible-light-driven photocatalytic removal. The effects of catalyst dosage, hole scavenger (CH 3 OH) dosage and solution pH on the photocatalytic reactions, as well as the photoreduction mechanisms were investigated in detail. In addition, ZnFe 2 O 4 rods own good stability, recyclability and magnetic separability. All these features make ZnFe 2 O 4 a promising photocatalyst for radioactive environmental remediation. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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