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首页> 外文期刊>RSC Advances >RGO/TiO2 nanosheets immobilized on magnetically actuated artificial cilia film: a new mode for efficient photocatalytic reaction
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RGO/TiO2 nanosheets immobilized on magnetically actuated artificial cilia film: a new mode for efficient photocatalytic reaction

机译：RGO / TiO 2 纳米片固定在磁驱动人工纤毛膜上：有效光催化反应的新模式

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Exploring a proper mode for practical reaction and efficient recycle has been an extensively studied subject in the photocatalysis field. Powder suspension reaction systems and two-dimensional (2D) film reaction systems are insufficient to attain this goal. Herein, we report a systematic study on immobilizing anatase TiO2 nanosheets on the magnetically actuated artificial cilia film by employing reduced graphene oxide (RGO) as the contact medium. The three-dimensional (3D) artificial cilia film is efficient in immobilizing more powder photocatalysts. When the artificial cilia film is actuated by the rotating magnetic field, the rhodamine B (RhB) degradation efficiency can be greatly improved because of the enhanced mass transfer and product desorption efficiencies. Compared to the static state, a three-fold improvement of the photocatalytic activity is obtained when the magnetic field actuation speed is 800 rpm. Furthermore, 83.1% of the photocatalytic activity is retained after 15 circular reactions, indicating its relative stability. Moreover, RGO conductivity and Au surface plasma resonance (SPR) can further improve the RhB degradation efficiency of 9.0% and 8.8%, respectively. Our findings suggest that this new photocatalysis mode is helpful to apply to, and recycle, the high-reactivity powder photocatalysts.
机译：在实践中，探索合适的反应模式和有效的循环利用已成为光催化领域中广泛研究的课题。粉末悬浮反应系统和二维（2D）薄膜反应系统不足以实现这一目标。在本文中，我们报告了系统化的研究，以还原氧化石墨烯（RGO）为接触介质，将锐钛矿型TiO 2 纳米片固定在磁驱动的人造纤毛膜上。三维（3D）人造纤毛膜可有效固定更多粉末光催化剂。当通过旋转磁场驱动人造纤毛膜时，由于增强了传质和产物解吸效率，可大大提高若丹明B（RhB）的降解效率。与静态相比，当磁场驱动速度为800 rpm时，光催化活性提高了三倍。此外，在15次环化反应后保留了83.1％的光催化活性，表明其相对稳定性。此外，RGO电导率和金表面等离子体共振（SPR）可以分别进一步提高RhB的降解效率，分别为9.0％和8.8％。我们的发现表明，这种新的光催化模式有助于将高反应性粉末光催化剂应用于并回收利用。

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