Novel large-sized mesoporous nanofilm-constructed macroporous SiO₂ (LMNCMS) with two sets of well-defined 3D continuous pass-through macropores (pore size of 0.5–1.0 μm, wall thickness of 40–50 nm) was prepared through a dual-templating approach, and used as an advanced support for TiO₂ nanocrystalline photocatalyst. The structural and optical properties of the as-prepared materials were investigated by various characterization techniques in order to explore the connections between catalysts’ features and catalytic performance. The photocatalytic activities were evaluated by degradations of methylene blue (MB) and phenol under the simulated sunlight irradiation. To gain insight into the impact of preparation and operation conditions on photocatalytic degradation processes, experiments were conducted at wide ranges of the TiO₂ loading content, calcination temperature, solution pH, and photocatalyst dosage. Nano-TiO₂/LMNCMS exhibited high photocatalytic activity and stability. Rapid matter transport, good accessibility of pollutants to TiO₂ and high light harvesting could mainly account for the superior photocatalytic performance. The trapping experiments were performed to identify the main reactive species in the catalytic reactions.

新型的大尺寸介孔纳米膜构成的大孔SiO ₂（LMNCMS）具有两套定义明确的3D连续通过大孔（孔径为0.5–1.0μm，壁厚为40–50 nm）。模板方法，并用作TiO ₂的高级载体纳米晶光催化剂。通过各种表征技术研究了所制备材料的结构和光学性质，以探索催化剂的特性与催化性能之间的联系。通过在模拟阳光照射下亚甲基蓝（MB）和苯酚的降解来评估光催化活性。为了深入了解制备条件和操作条件对光催化降解过程的影响，在TiO ₂负载量，煅烧温度，溶液pH值和光催化剂用量的广泛范围内进行了实验。纳米TiO ₂ / LMNCMS具有较高的光催化活性和稳定性。物质快速运输，污染物与TiO _2的良好可达性高光收率可主要归因于优异的光催化性能。进行捕集实验以鉴定催化反应中的主要反应物种。