RZ
Rui Zhang
Author with expertise in Formation and Application of Food Nanoemulsions
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Preparation of ternary composite film TiO2/Fe2O3/Ti3C2 for photoelectrocatalytic degradation of organic pollutants and bacterial inactivation in water

Yanping Ma et al.Jun 2, 2024
Global water pollution is a serious problem, and photoelectrocatalytic technology is expected to be a new path to solve it. In this study, a ternary composite TiO2/Fe2O3/Ti3C2 photoanode was synthesized by hydrothermal, water bath and spin-coating methods for the photoelectrocatalytic degradation of pollutants and disinfection in water. The results showed that the composite film was capable of degrading 96.74% of MB solution within 120 min and killing 99.43% of E. coli and 100.00% of S. aureus within 30 min. Furthermore, the MB degradation efficiency remained nearly constant throughout the 35th cyclic photoelectrocatalytic reaction, demonstrating the adequate stability of the photoanode. The outstanding performance of the film is attributed to (1) the large specific surface area due to the unique structure of composite, (2) low surface-interface resistance and improvement of photogenerated carrier separation and migration because of heterojunction structure and co-catalyst Ti3C2 with high conductivity. It is also proved that the four radicals ·O2-, ·OH, ∙Cl, ∙ClO play a role in the system. This study provides a practical direction for designing future photocatalytic materials and advancing the treatment of pollutants in water.