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在微乳液体系中成功地将花瓣状介孔氧化硅微球(KCC-1)包覆在钛硅分子筛TS-1表面,得到了一种新型微孔/介孔复合核壳结构材料TS-1@KCC-1.详细考察了TS-1@KCC-1的合成条件及可能的形成机理.适宜的合成温度及时间分别为373–393 K和4h.壳层厚度可方便地通过改变硅源正硅酸乙酯和TS-1的比例在25–80 nm间进行调控.以TS-1@KCC-1为载体负载Rh(OH)x后即得到双功能催化材料Rh(OH)x/TS-1@KCC-1,该材料同时具有Ti和Rh(OH)x活性中心,可以高效催化醛、氨水和过氧化氢经一锅串联反应直接制备得到伯酰胺.
In the microemulsion system, the petal-shaped mesoporous silica microspheres (KCC-1) were successfully coated on the surface of TS-1, a novel microporous / mesoporous composite core-shell structure material TS-1 @ KCC-1. The synthesis conditions and possible formation mechanisms of TS-1 @ KCC-1 were investigated in detail.The suitable synthesis temperature and time were 373-393 K and 4 h, respectively.The thickness of the shell can be easily adjusted by changing the silicon source The ratio of ethyl silicate and TS-1 was controlled between 25-80 nm.The Rh (OH) x / TS-1 catalyst was obtained after loading Rh (OH) x with TS-1 @ KCC- 1 @ KCC-1, the material has both Ti and Rh (OH) x active centers, which can efficiently catalyze the direct formation of primary amides from aldehydes, ammonia and hydrogen peroxide in a one-pot series reaction.