磷钨酸改性HMS介孔材料的合成及其催化性能
发布时间：2019-05-16 15:32
【摘要】：以磷钨酸(HPW)为活性组分,采用负载和弱碱条件下原位合成的方法,对六方介孔硅(HMS)进行改性得到HPW/HMS和HPW-HMS介孔材料,利用XRD、SEM、Py-IR和N_2吸附-脱附对合成的介孔材料进行表征,考察了HPWHMS模板剂脱除方式、HPW含量对催化β-甲氧基萘的乙酰基化反应性能的影响。实验结果表明,与HPW/HMS比较,HPW-HMS介孔材料的结构更稳定,HPW分散更均匀、且不易溶脱、酸性更强;当HPW的质量分数为58%时,HPW-HMS催化β-甲氧基萘乙酰化反应β-甲氧基萘的转化率最高,达65.3%,主产物2-甲氧基-1-萘乙酮的选择性为78.9%;两种介孔材料均可回收再利用,且HPW-HMS循环再利用效果胜于HPW/HMS。
[Abstract]:HPW/HMS and HPW-HMS mesoporous materials were prepared by in situ synthesis of hexagonal mesoporous silicon (HMS) with phosphotungstate (HPW) as active component under loading and weak alkali conditions. HPW/HMS and HPW-HMS mesoporous materials were prepared by XRD,SEM,. The mesoporous materials were characterized by Py-IR and N 鈮，
本文编号：2478378
[Abstract]:HPW/HMS and HPW-HMS mesoporous materials were prepared by in situ synthesis of hexagonal mesoporous silicon (HMS) with phosphotungstate (HPW) as active component under loading and weak alkali conditions. HPW/HMS and HPW-HMS mesoporous materials were prepared by XRD,SEM,. The mesoporous materials were characterized by Py-IR and N 鈮，
本文编号：2478378
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