Enhancing the efficiency of visible light degradation is important for the actual application of TiO₂/SiO₂ (Ti/Si) composite materials for waste water treatment. In this manuscript, graphdiyne-doped TiO₂/SiO₂ (Ti/Si/GDY) (the Ti/Si composite exhibits a spherical shape with a diameter between 200 and 500 nm) composite material was successfully prepared using a hydrothermal method, which was utilized as photocatalyst for the photocatalytic degradation of methylene blue (MB) in aqueous solution under visible light illumination. Studies showed that Ti/Si/GDY-0.8 wt% exhibited superior photocatalytic degradation efficiency (91.8%) under visible light illumination than other composite materials such as Ti/Si/GDY-0.6 wt% (87.9%), Ti/Si/GDY-1.0 wt% (85.9%), and bare Ti/Si composite (32.3%). Moreover, Ti/Si/GDY also showed a higher photocatalytic degradation efficiency than other carbon materials (graphene (GR) and carbon nanotube (CNT) composited Ti/Si (Ti/Si/GR, Ti/Si/CNT)). The studies of the possible mechanism for the degradation of MA indicated that h⁺ was the major substance for the smooth degradation of methylene blue. Such a high efficiency photocatalyst might be also useful for the degradation of other contaminates in waste water or air.

对于将TiO ₂ / SiO ₂（Ti / Si）复合材料用于废水处理的实际应用而言，提高可见光降解效率非常重要。在此手稿中，掺杂了石墨_二炔的TiO ₂ / SiO ₂（Ti / Si / GDY）（Ti / Si复合材料呈球形，直径在200至500 nm之间）使用水热方法成功制备了复合材料，该材料用作光催化剂用于亚甲基蓝（MB ）在可见光照明下的水溶液中。研究表明，Ti / Si / GDY-0.8 wt％在可见光照射下表现出比其他复合材料（如Ti / Si / GDY-0.6 wt％（87.9％），Ti / Si / GDY）优异的光催化降解效率（91.8％）。 -1.0重量％（85.9％）和裸钛/硅复合材料（32.3％）。此外，Ti / Si / GDY还显示出比其他碳材料（石墨烯（GR）和碳纳米管（CNT）复合Ti / Si（Ti / Si / GR，Ti / Si / CNT））更高的光催化降解效率。对MA降解的可能机理的研究表明，h⁺是亚甲基蓝平滑降解的主要物质。这种高效的光催化剂还可用于降解废水或空气中的其他污染物。