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对壳聚糖进行了N-己基化改性,并在此基础上制备了铂纳米簇/N-己基化壳聚糖杂化膜,研究了该杂化膜催化剂在苯加氢反应中的催化性能。利用FT-IR、TEM、XRD和XPS等手段对杂化膜催化剂的结构进行了表征。TEM结果显示,铂纳米粒子平均直径约为5 nm,XPS结果表明,Pt与壳聚糖中的N和O之间存在一定程度的配位。用N-己基化壳聚糖负载铂纳米簇杂化膜催化苯液相加氢反应,部分加氢产物环己烯的选择性可达60.3%,而单独以Pt纳米簇作为催化剂无壳聚糖膜时,没有环己烯生成。结合催化剂表征结果和催化性能分析,杂化膜在反应体系中的溶胀过程以及Pt与N、O之间的配位作用等因素是控制苯加氢反应的主要原因。
N-Hexylation of chitosan was carried out. Based on this, Pt nanocluster / N-hexylated chitosan hybrid membrane was prepared and the catalytic activity of the hybrid membrane catalyst in benzene hydrogenation performance. The structure of the hybrid catalyst was characterized by FT-IR, TEM, XRD and XPS. TEM results showed that the average diameter of Pt nanoparticles was about 5 nm. The XPS results showed that there was a certain degree of coordination between Pt and N and O in chitosan. N-Hexyl chitosan supported platinum nanocluster hybrid membrane catalytic hydrogenation of benzene liquid phase, partial hydrogenation of cyclohexene up to 60.3% selectivity, and Pt nanoclusters alone as a catalyst without chitosan When the membrane, there is no cyclohexene formation. Combining the catalyst characterization and catalytic performance analysis, the swelling process of the hybrid membrane in the reaction system and the coordination between Pt and N, O and other factors are the main reasons for controlling the hydrogenation reaction of benzene.