气固相同晶取代法 Ti-ZSM-5 沸石的表征及催化性能

Characterization and catalytic property of Ti ZSM 5 zeolite prepared by gas solid isomorphous substitution

以ＴＥＡＢｒ（四乙基溴化铵）作为模板剂合成的ＺＳＭ－５沸石为母体，采用气固相同晶取代法制得Ｔｉ－ＺＳＭ－５沸石．ＸＲＤ、ＦＴ－ＩＲ、ＵＶ－Ｖｉｓ、元素分析及ＸＰＳ等表征手段证实钛原子进入了沸石骨架，并且进入骨架中的钛富集于沸石晶体的表相．苯酚与稀双氧水（２９％）的羟基化反应结果表明，Ｔｉ－ＺＳＭ－５沸石具有显著的催化性能．

Ti ZSM 5 zeolite has been prepared by gas soild isomorphous substitution using ZSM 5 as precursor synthesized with TEABr(tetraethylammonium bromide) template. XRD, FT IR, UV Vis, chemical analysis and XPS results show that Ti atoms are mainly tetrahedrally coordinated in the framework of Ti ZSM 5 zeolite and that titanium in the framework is enriched on the surface of crystal. Ti ZSM 5 zeolite has excellent catalytic property according to the results of hydroxylation of phenol with aqueous hydrogen peroxide.