Abstract: Mesoporous molecular sieves such as hexagonally ordered MCM-41 have potential applications in catalysis,adsorption and separation,preparation of advanced materials,and molecular devices since they are firstly discovered in1 992 .However,as compared with zeolites,the acidity and hydrothermal stability of these mesostructured materials are relatively low,which strongly affecttheir practical applications in in-dustrial catalytic reactions of petroleum.Here it is systematically summarized that the research work on improvement of acidity and hydrothermal stability forordered mesoporousmaterials,which include(1) the assembly of super acidic components into the mesopores;(2) the addition of inorganic salts,organic am-monium compounds during the synthesis of mesoporous materials or post-synthesis of mesoporous materi-als;(3) the synthesis of mesoporous materials from novel templates such as triblock copolymers;(4) the assembly of mesoporous materials from pre-formed zeolite structure-directing-agent(zeolite seeds solution) with zeolite primary and secondary building structure units.

Key words: Mesoporous molecular sieve, Acidity, Hydrothermal stability, Catalytic materials