Photocatalytic nanomaterials have been widely used in the photocatalytic fields. However, traditional nanomaterials need to be dispersed in the solution and usually have some difficulties to be separated. Herein, a floating and stable g-C₃N₄/PMMA/CFs porous film was designed by a simple casting method. Chemically protonated g-C₃N₄ treated by H₂SO₄ has good dispersion and adhesion with PMMA. Cotton fiber solution (CFs) was added to improve the flexibility of the film. The g-C₃N₄/PMMA/CFs porous film provides an automatic photocatalytic reaction platform, which can float on the surface of water and absorb the sunlight easily. Furthermore, PMMA is transparent, which have negligible influence on the light absorption for g-C₃N₄. The photocatalytic activity of the g-C₃N₄/PMMA porous film showed that the film containing 6% of g-C₃N₄ can degrade 83% of 50 mL RhB solution (10 mg/L) in 180 min. The recyclability showed that about 97% of the photocatalytic activity can be retained after six times of reuse. The stability of the film showed that more than 90% of the photocatalytic activity can be retained after ultrasonication for 60 min.

光催化纳米材料已经广泛地用于光催化领域。但是，传统的纳米材料需要分散在溶液中，通常很难分离。本文中，通过简单的流延方法设计了漂浮且稳定的gC ₃ N ₄ / PMMA / CFs多孔膜。化学质子化GC ₃ Ñ ₄由H处理₂ SO ₄具有良好的分散性和与PMMA粘合性。添加棉纤维溶液（CFs）以改善薄膜的柔韧性。gC ₃ N ₄/ PMMA / CFs多孔膜提供了一个自动的光催化反应平台，该平台可以漂浮在水表面并容易吸收阳光。此外，PMMA是透明的，其对于gC ₃ N ₄的光吸收具有可忽略的影响。gC ₃ N ₄ / PMMA多孔膜的光催化活性表明，含6％gC ₃ N ₄的膜可在180分钟内降解50％RhB溶液（10 mg / L）的83％。可循环利用性表明，在重复使用六次后，可以保留约97％的光催化活性。膜的稳定性表明，超声处理60分钟后，可以保留90％以上的光催化活性。