Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 60, Issue 35, Pages 12893-12900Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c01728
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Funding
- Natural Science Foundation of China [21706295, 21806027]
- Natural Science Foundation of Guangdong Province [2020A1515010798, 2018A030313479]
- Science and Technology Research Project of Guangzhou [202002010007]
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The study introduced carbon into the contact interface between ZnFe2O4 and TiO2 to enhance electrical conductivity and improve the separation efficiency of photogenerated electrons. This resulted in improved catalytic activity for tetracycline (TC) degradation and stability under visible light irradiation. The research provides an effective strategy for preparing heterojunction photocatalysts by enhancing the conductivity of the contact interface.
The charge transfer route for photocatalyst-based hybridization is determined by interfacial energy band alignment. Herein, we designed and synthesized novel ZnFe2O4/C/TiO2 hollow photocatalysts, in which carbon was introduced into the contact interface between ZnFe2O4 and TiO2. Experimental results reveal that carbon enhances the electrical conductivity at the interfacial contact, improving the separation efficiency of photogenerated electrons. ZnFe2O4/C/TiO2 catalyst shows superior activity for degradation of tetracycline (TC) and excellent stability with the irradiation of visible light. Furthermore, the photodegradation mechanism was studied in detail and the results revealed that O-center dot(2)- and (OH)-O-center dot were produced during the photocatalytic degradation reaction. This work grants an effective approach for preparing heterojunction photocatalysts via improving the conductivity of the contact interface.
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