HIERARCHICALLY POROUS STRUCTURED MATERIALS AND THEIR ENHANCED CATALYTIC ACTIVE STABILITY

摘要

As a hot topic in recent years, hierarchically porous structured materials have received plenty of attentions and lots of work has been done on their synthesis. For their outstanding properties, hierarchically porous structured materials have attractively potential applications in catalysis, controlled release, biomedicine, separation science and energy. We have synthesized several micro-meso-macro hierarchically porous structured materials through different methods. Except for some general characteristics of porous structured materials, these materials possess some common superiorities, and the highlight is that they have highly interconnected network of well-defined macropores with uniform mesoporosity and zeolitic micro-channels which can lead to highly active sites, larger external surface areas and fast diffusion of species. We applied these hierarchically porous structured materials to catalysis by encapsulating active species into macropores, such as enzymes,metallic oxide nanoparticles and metallic ion, which exhibite high catalytic activity, long-term stability, and excellent recycling behaviour. Hierarchically porous structured materials applied to catalysis are obviously more attractive and promising than tradition catalysts. What's more, other advanced properties can be exploited in the design of magnetic devices, sensors, and biofuel cell etc. which are based on hierarchically porous structured materials.