Zeolites are an important class of crystalline porous materials with well-defined micropore size, large specific surface area, intrinsic acidity, and high (hydro)thermal and chemical stability.However, the sole presence of micropores (typically less than 1.2 nm) also imposes significant limitations on the range of reactions, especially those involving bulky molecules.In order to diminish the diffusion limitations present in purely microporous zeolites during catalytic applications, the hierarchically structured zeolites have attracted much attention in recent years [1].