关键词:

铁, HMS, 催化氧化, 苯甲醇, 苯甲醛

Abstract:

The iron-incorporated hexagonal mesoporous silica (HMS) material Fe-HMS was synthesized at ambient temperature by using dodecylamine as the template agent, and was characterized by XRD,BET，SEM, H₂-TPR and N₂ adsorption measurements.Its catalytic performance for oxidation of benzyl alcohol with H₂O₂ to benzyl aldehyde was investigated.The effects of reaction conditions were examined.The results showed that Fe³⁺ ions were incorporated into the framework of HMS, and Fe-HMS had a uniform mesoporous structure.Most of the Fe³⁺ ions (Fe₂O₃) of calcined Fe-HMS remained in the tetrahedral coordinated framework.Fe-HMS exhibited superior catalytic performance in the selective oxidation of benzyl alcohol compared to the common silica-supported material by the same method. At molar ratio of Si to Fe 25∶1, molar ratio of benzyl alcohol to H₂O₂ 1∶2, catalyst content 4%(mass), reaction time 85℃ and reaction time 4 h, the conversions of benzyl alcohol and the selectivity for benzyl aldehyde reached 65.1% and 74.6%, respectively.

Key words:

铁, HMS, 催化氧化, 苯甲醇, 苯甲醛