光纤负载TiO_(2)/V_(C)-CN薄膜光催化降解药厂废水中有机污染物

Photocatalytic Degradation of Organic Pollutants in Pharmaceutical Wastewater by TiO_(2)/V_(C)-CN Films Supported by Optical Fiber

设计溶胶–凝胶结合浸渍–提拉技术,将具有优异光催化氧化性能的TiO_(2)/V_(C)-CN粉末涂覆在石英光纤上,开发光纤负载TiO_(2)/V_(C)-CN薄膜光催化反应器。在模拟太阳光辐射下,考察了光纤负载TiO_(2)/V_(C)-CN薄膜降解实际工业污水及其水中混合有机污染物的性能,以及催化剂薄膜的循环使用情况。研究表明,将TiO_(2)/V_(C)-CN异质结优异的光催化氧化性能与光纤独特的光传播方式相结合,实现了实际工业污水的高效降解,模拟太阳光辐射8 h后,模拟污水的COD去除率达60.9%。此外,污水中的混合有机污染物均可被有效降解。重要的是,光纤负载TiO_(2)/V_(C)-CN薄膜具有良好的循环使用性能,循环使用过程中无需分离催化剂且可基本保持其活性无明显降低。

By using the most active photocatalysts,TiO_(2)/V_(C)-CN heterojunction,the custom-designed TiO_(2)/V_(C)-CN film-coated optical fiber photoreactor is fabricated via sol-gel technology to prepare TiO_(2)/V_(C)-CN sol followed by dip-withdrawing to TiO_(2)/V_(C)-CN film.The photocatalytic performance of TiO_(2)/V_(C)-CN film in the degradation of actual industrial wastewater and the mixture of organic pollutants in water under simulated sunlight irradiation were systematically evaluated,and the stability and recyclability of TiO_(2)/V_(C)-CN film were also studied.By the combination of superior oxidation performance of TiO_(2)/V_(C)-CN heterojunction and unique light transmission mode of optical fibers,the TiO_(2)/V_(C)-CN film exhibits higher photocatalytic activity in the degradation of actual industrial wastewater.After 8 h of simulated sunlight irradiation,the COD removal efficiency reaches up to 60.9%;additionally,the mixture of organic pollutants in the effluent can be degraded effectively.More importantly,the TiO_(2)/V_(C)-CN film exhibits excellent stability and recyclability,and the catalyst film can be reused without separation of photocatalysts nanoparticles from the treated water,and no obvious activity loss is observed after several photocatalytic cycles.