The catalytic properties of TiO_2/SiO2 were closely related with the state oftitania, and the TiO_2 species in the form of amorphism was responsible for thesynthesis of MPO and DPO.

• TiO_2在载体表面的存在状态是影响负载型TiO_2/SiO2催化剂活性的关键因素,TiO_2以无定形单分子层高度分散在催化剂表面时,有助于目的产物的生成。