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以活性炭为载体,将壳聚糖(CS)负载到活性炭上得到复合载体,利用CS对Pt的螯合作用,制备活性炭负载CS络合Pt配合物催化剂(AC—CS—Pt),并考察了AC—CS—Pt催化剂催化烯烃与三乙氧基硅烷加成反应性能。采用X-射线衍射(XRD)、红外光谱(IR)和热重分析(TG)对AC—CS—Pt进行了表征,结果表明Pt与CS氨基N原子配位形成Pt—N配位键。对辛烯硅氢加成反应,AC—CS—Pt催化剂显示高活性和极好的产物选择性,β-加成产物的选择性达99%;具有良好的重复使用性能,AC—CS—Pt催化剂经简单过滤分离后,可连续使用14次而活性没有明显下降。
The active carbon was used as a carrier, and the chitosan (CS) was loaded on the activated carbon to obtain a composite carrier. The CS complexed Pt complex catalyst (AC-CS-Pt) was prepared by the chelating action of CS on Pt. AC-CS-Pt Catalysts for Catalytic Addition of Alkenes to Triethoxysilane. The AC-CS-Pt was characterized by X-ray diffraction (XRD), infrared spectroscopy (IR) and thermogravimetric analysis (TG). The results showed that Pt and N atom of CS were coordinated to form Pt-N coordination bond. AC-CS-Pt catalyst shows high activity and excellent product selectivity to octylsilane hydrosilylation reaction, the selectivity of β-adduct is up to 99%. With good reusability, AC-CS-Pt After the catalyst was separated by simple filtration, it could be used continuously for 14 times with no obvious decrease in activity.