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Visible-light-driven elimination of oxytetracycline and Escherichia coli using magnetic La-doped TiO2/copper ferrite/diatomite composite

  • Yan Chen
  • Qiong Wu
  • Jun WangEmail author
  • Youtao SongEmail author
Research Article
  • 21 Downloads

Abstract

The development of powdery photocatalyst has long been studied, yet the low recovery in water is still its bottleneck. In this work, magnetic recyclable lanthanum-doped TiO2/copper ferrite/diatomite (La-TCD) ternary composite was synthesized via sol-gel method. The physicochemical properties of various hybrid catalysts were characterized and studied, and their photocatalytic properties were evaluated via the decomposition of antibiotic oxytetracycline and disinfection of bacteria Escherichia coli under visible light. The formation of heterojunction between La-doped TiO2 and copper ferrite hindered the recombination of photo-induced charge carriers and improved the photocatalytic activity. The photodecomposition rate of OTC was accelerated by the high adsorption ability of diatomite, due to the adsorption and decomposition synergistic effect between catalysts and substrate diatomite. The optimal La dopant amount as well as optimal catalyst dosage was determined. The composite could simply be recovered from waterbody via an external magnet, and the repetition tests indicated no obvious decrease of photoactivity. This nanocomposite presented good potential to be applied in environmental remediation process, due to its high photocatalytic efficiency under visible light, as well as its good reusability and stability.

Keywords

La-doped Oxytetracycline Magnetic recyclable Diatomite Copper ferrite 

Notes

Funding information

The authors received the support offered by the National Science Foundation of China (31570154) and the Major Science and Technology Project of Water Pollution Control and Management in China (2015ZX07202-012).

Supplementary material

11356_2019_5873_MOESM1_ESM.doc (20.9 mb)
ESM 1 (DOC 21427 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of EnvironmentLiaoning UniversityShenyangPeople’s Republic of China
  2. 2.College of ChemistryLiaoning UniversityShenyangPeople’s Republic of China

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