Abstract
Background: 17α-Ethinylestradiol (EE2) is an environmental endocrine disruptor that causes serious harm to the human body, so how to effectively remove EE2 is an urgent problem that people need to solve. Herein, BiVO4 photo-catalyst was applied to the photo-catalytic degradation of EE2 and the influence of the catalyst's wettability on the degradation of EE2 was discussed.Methods: BiVO4 photo-catalyst was prepared by hydrothermal method, and modified with different doses of 3-aminopropyltriethoxysilane (APTES) to tune its surface wettability.Significant Findings: Through the research, it was found that adjusting the WCA of APTES-modified BiVO4 to the range of 14.0 °∼23.6 ° can obtain better photo-catalytic activity. When the Water Contact Angle (WCA) of modified BiVO4 was 17.7 ° (0.70 mL APTES), the photo-catalytic activity was the best, with the removal rate of EE2 reaching 91.27%, while unmodified BiVO4 was only 59.34%. The reaction rate constant of BiVO4 (0.70 APTES) for the photo-catalytic degradation of EE2 was 2.78 times of unmodified BiVO4. Compared to other methods, the method of improving the photo-catalytic performance by controlling the wettability of the material surface was simpler and more flexible. Therefore, it has a very broad application prospect in the efficient removal of organic pollutants.
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