State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Nanoscale. 2013 Dec 7;5(23):11894-901. doi: 10.1039/c3nr03901c. Epub 2013 Oct 15.
Smart systems on the nanometer scale for continuous flow-through reaction present fascinating advantages in heterogeneous catalysis, in which a parallel array of straight nanochannels offers a platform with high surface area for assembling and stabilizing metallic nanoparticles working as catalysts. Herein we demonstrate a method for finely modifying the nanoporous anodic aluminum oxide (AAO), and further integration of nanoreactors. By using atomic transfer radical polymerization (ATRP), polymer brushes were successfully grafted on the inner wall of the nanochannels of the AAO membrane, followed by exchanging counter ions with a precursor for nanoparticles (NPs), and used as the template for deposition of well-defined Au NPs. The membrane was used as a functional nanochannel for novel flow-through catalysis. High catalytic performance and instantaneous separation of products from the reaction system was achieved in reduction of 4-nitrophenol.
用于连续流动反应的纳米级智能系统在多相催化中具有迷人的优势，其中平行排列的直纳米通道为组装和稳定作为催化剂的金属纳米颗粒提供了具有高表面积的平台。在此，我们展示了一种精细修饰纳米多孔阳极氧化铝（AAO）并进一步集成纳米反应器的方法。通过原子转移自由基聚合（ATRP），成功地将聚合物刷接枝到 AAO 膜纳米通道的内壁上，然后用纳米颗粒（NPs）的前体交换抗衡离子，并用作沉积定义明确的 Au NPs 的模板。该膜可用作新型流动催化的功能纳米通道。在 4-硝基苯酚的还原反应中，实现了高催化性能和产物从反应体系的瞬时分离。
