Transparent floatable magnetic alginate sphere used as photocatalysts carrier for improving photocatalytic efficiency and recycling convenience
| Autor: | Tian Hu, Lin Minzhao, Wei-Xiong Li, Yongtao Li, Zeng-Lin Li, Huang Xianhang, Gang-Biao Jiang, Huaitian Bu, Hu Hanjian, Wen-Zhao Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics business.industry Organic Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Environmentally friendly 0104 chemical sciences Semiconductor Chemical engineering Environmental risk Materials Chemistry Photocatalysis 0210 nano-technology Photodegradation business |
| Zdroj: | Carbohydrate polymers. 254 |
| ISSN: | 1879-1344 |
| Popis: | Practical application of powder photocatalysts is far from satisfying due to their low photon utilization, inconvenient recovery and potential environmental risk. In this study, an easily recoverable, environmentally friendly and highly transparent floatable magnetic photocatalyst carrier was prepared based on biopolymer alginate and Fe3O4 particles. Further, three different types of photocatalysts were chosen as model semiconductor photocatalysts and loaded on the shell of the carriers. The freeze process facilitated the formation of internal cavities that enhanced floating ability and transparency of the spheres. Meanwhile, the excellent floating performance offered massive reaction sites for pollutants reacting with photocatalysts, O2 and photons on the air/water interface. Photodegradation results showed all three floatable hybrid photocatalysts exhibited enhanced photocatalytic efficiencies compared to the virgin photocatalysts. In short, the carrier can integrate excellent floating ability, environmental friendliness and full recycling with good stability, and it can greatly improve the photocatalytic efficiency of various powder semiconductor photocatalysts. |
| Databáze: | OpenAIRE |
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