Durable visible light self-cleaning surfaces imparted by TiO 2 /SiO 2 /GO photocatalyst

This research intends to enhance the photocatalytic efficiency and durability of substrates coated with TiO 2 -based nanocomposites under visible light illumination. More specifically, TiO 2 /SiO 2 /graphene oxide nanocomposites are successfully sono-synthesized and sono-fabricated onto a polymeric fabric through a facile one-step method. The morphologies, phase structures and optical properties of the samples are studied. The photocatalytic activity of the functionalized samples is assessed through a gentian violet stain removal test and then photodecomposition of methylene blue under visible light, and tested again after 10 washes to check on its durability. It is corroborated that TiO 2 /SiO 2 /graphene oxide nanocomposites have shown significantly better visible light self-cleaning performance than just using the pure TiO 2 alone. In addition, even after 10 washes, the samples virtually maintain the functionality. Herein, sono-synthesis of TiO 2 /SiO 2 /graphene oxide represents a remarkable step forward in visible light-driven self-cleaning treatment for flexible materials and, hence, holds a great potential for commercialization.