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Transparent floatable magnetic alginate sphere used as photocatalysts carrier for improving photocatalytic efficiency and recycling convenience

Transparent floatable magnetic alginate sphere used as photocatalysts carrier for improving photocatalytic efficiency and recycling convenience

Category
Academic article
Abstract
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.
Language
English
Author(s)
  • Xian-Hang Huang
  • Tian Hu
  • Huaitian Bu
  • Wei-Xiong Li
  • Zeng-Lin Li
  • Han-Jiang Hu
  • Wen-Zhao Chen
  • Min-Zhao Lin
  • Yongtao Li
  • Gang-Biao Jiang
Affiliation
  • Unknown
  • SINTEF Industry / Materials and Nanotechnology
Year
Published in
Carbohydrate Polymers
ISSN
0144-8617
Publisher
Elsevier
Volume
254