A scalable route to encapsulate homogeneously fine Pt and Ag nanoparticles (NPs) inside amine-functionalized KIT-6 mesochannels via two different reduction routes as heterogeneous mesoporous catalysts is demonstrated. The active amine groups functionalized KIT-6 mesochannels act as anchor sites to immobilize the homogeneous Pt and Ag NPs catalysts with small-sized NPs of approximately 6.0 and 3.0 nm, respectively. The catalysts were fully characterized, and the surface areas were relatively decreased after deposition of the metals NPs. Even after metal NPs deposition, the mesochannels are readily accessible for enhancing their catalytic activity. The meso-KIT-6-Pt catalyst synthesized with ascorbic acid (AA) reduction route shows a higher catalytic efficiency for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with a reaction rate almost 2 times higher than that of the meso-KIT-6-Ag synthesized using formaldehyde. The as-prepared mesoporous catalysts exhibit a good reusability, with a high catalytic efficiency for at least 5 successive cycles without an obvious loss in their catalytic activity. The influences of reaction parameters, such as catalyst dose, reaction temperarture and nature of solvent on the catalytic performance of the mesoporous catalysts are of the main study.

展示了一种可扩展的途径，可以通过两种不同的还原途径将胺和功能化的KIT-6介孔通道内的Pt和Ag纳米颗粒均匀地包裹起来，作为非均相介孔催化剂。活性胺基官能化的KIT-6介孔通道充当锚定位点，分别固定均质Pt和Ag NPs催化剂，分别具有约6.0和3.0 nm的小尺寸NP。充分表征了催化剂，并且在沉积金属NP后表面积相对减小。即使在金属NP沉积后，也容易接近介孔通道以增强其催化活性。中观用抗坏血酸（AA）还原路线合成的-KIT-6-Pt催化剂显示出更高的催化效率，可将4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP），反应速率几乎提高了2倍与使用甲醛合成的内消旋-KIT-6-Ag相比。所制备的中孔催化剂表现出良好的可重复使用性，在至少5个连续循环中具有高催化效率，而其催化活性没有明显损失。主要研究催化剂用量，反应温度和溶剂性质等反应参数对介孔催化剂催化性能的影响。