Novel photocatalytic performance of magnetically recoverable MnFe2O4/BiVO4 for polluted antibiotics degradation
| Autor: | Thanh-Dong Pham, Nguyen Tien Trung, Mai Hung Thanh Tung, Nguyen Thuy Huong, Nguyen Thi Dieu Cam, Cao Van Hoang, Tran Thi Thu Phuong, Hai Dinh Pham, Tran Thi Thu Hien |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Radical chemistry.chemical_element Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Oxygen Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 0103 physical sciences Oxidizing agent Materials Chemistry Ceramics and Composites Valence band Photocatalysis Degradation (geology) 0210 nano-technology Visible spectrum |
| Zdroj: | Ceramics International. 47:1686-1692 |
| ISSN: | 0272-8842 |
| Popis: | In the study, we successfully decorated MnFe2O4 on BiVO4 to highly improve its photocatalytic activity for degradation of tetracycline as well as its magnetically recovery. The decoration of MnFe2O4 on BiVO4 led to formation of MnFe2O4/BiVO4 Z scheme heterojunction to effectively prevent the charge recombination in each material. Upon visible light, the MnFe2O4/BiVO4 heterojunction produced significant available amounts of e− and h+ existing in the conduction band of the MnFe2O4 and the valence band of the BiVO4, respectively. These produced e− on the conduction band of the MnFe2O4, which reduction potential was approximately −0.41 eV, exhibited strong reduction potential reducing oxygen to produce •O2− radicals while h+ on the valence band of the BiVO4, which oxidation potential was 2.77 eV, showed strong oxidation potential oxidizing water and hydroxyl groups to produce •OH radicals. These generated active oxygen radicals effectively degraded TC in water (~92%). The used photocatalysts were easily recovered from photocatalytic suspension using an external magnet due to high magnetically activity of the MnFe2O4, which tightly bonded with BiVO4 in the MnFe2O4/BiVO4 heterojunction. Finally, the recovered MnFe2O4/BiVO4 heterojunction was very active and stable for tetracycline degradation in long-term process. |
| Databáze: | OpenAIRE |
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