A novel ternary Ag decorated TiO₂/sepiolite (AgTiS) composites were synthesized via a facile solvothermal reaction in an acetic acid–water solvent. The morphology, structure, and photoelectric properties of AgTiS were characterized in detail, and the results showed that Ag decorated TiO₂ nanoparticles with a diameter of 10–20 nm were highly dispersed on the sepiolite nanofibers. Compared with TiO₂, sepiolite, and TiO₂/sepiolite, the designed AgTiS composites exhibited markedly enhanced photocatalytic activity in the degradation of methyl orange (MO) under UV–vis light (350≤λ ≤ 780 nm) and visible light (λ ≥ 420 nm) irradiation. Specifically, the 5%AgTiS composite exhibited the best photocatalytic activity, achieving 100% photocatalytic efficiency after 50 min of UV–vis light or 260 min of visible light irradiation, respectively. The trapping of active species showed that holes and superoxide radicals played important roles in the photocatalytic degradation of MO process. The excellent photocatalytic performance was ascribed to the low band-gap energy (2.65 eV), the effective charge separation, and the sepiolite carrier effect (large specific surface area, well distribution, and enhanced adsorption ability).

通过在乙酸-水溶剂中的轻松溶剂热反应合成了新型的三元银修饰的TiO ₂ /海泡石（AgTiS）复合材料。详细描述了AgTiS的形貌，结构和光电性能，结果表明，直径10-20 nm的用Ag装饰的TiO ₂纳米颗粒高度分散在海泡石纳米纤维上。与TiO ₂，海泡石和TiO _2相比/海泡石，设计的AgTiS复合材料在紫外可见光（350≤λ≤780 nm）和可见光（λ≥420 nm）辐照下，对甲基橙（MO）的降解表现出显着增强的光催化活性。具体而言，5％AgTiS复合材料表现出最佳的光催化活性，分别在50分钟的紫外线可见光照射或260分钟的可见光照射后达到100％的光催化效率。活性物种的捕获表明，空穴和超氧自由基在MO过程的光催化降解中起着重要作用。优异的光催化性能归因于低带隙能量（2.65 eV），有效的电荷分离和海泡石载体效应（大比表面积，良好的分布和增强的吸附能力）。