Facile preparation of nanostructured NixZn1−xFe2O4/CNTs composites with enhanced visible-light-driven photocatalytic activity for tetracycline degradation
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NixZn1−xFe2O4/CNTs composite photocatalysts were prepared via a facile hydrothermal method, and their physical and chemical properties were investigated. The effect of different Ni doping amounts on the photocatalytic activity of NixZn1−xFe2O4 and Ni0.5Zn0.5Fe2O4/CNTs photocatalysts containing different amounts of carbon nanotubes (CNTs) were investigated for their ability to degrade tetracycline (TC) in wastewater. The results showed that Ni0.5Zn0.5Fe2O4/CNTs (5% CNTs) had the highest photocatalytic activity, achieving a TC degradation of 96%. The origin of the excellent performance of the photocatalysts, as well as the photodegradation mechanism, were also discussed. Effective electron–hole separation is believed to be responsible for the significantly improved photocatalytic activity. After four photocatalytic degradation experiments, the composite photocatalyst retained its high photocatalytic activity, and the results showed that the composite photocatalysts were highly stable and could be magnetically separated.
This work was financially supported by the National Natural Science Foundation of China (No. 21605090), the Key Scientific Programs of Higher Education of Henan Province of China (No. 18A430022), the Science and Technology Program of Pingdingshan (No. 201701104), the Doctoral Scientific Research Foundation of Pingdingshan University (No. PXY-BSQD-2018005), the National Scientific Research Project Cultivating Foundation of Pingdingshan University (No. PXY-PYJJ2016005), the Carry-over Project of Pingdingshan University (No. JZ2017012), the Science and Technology Key Project of Henan Province (No. 192102210031).
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We declare that we have no financial and personal relationships with people or organizations that can inappropriately influence our work. There is no professional or personal interest of any nature or kind in any product, service, and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.
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