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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
【摘要】 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.
【Abstract】 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.
【关键词】 同晶型取代;
沸石;
羟基化/Ti-ZSM-5;
【Key words】 isomorphic substitutions; zeolites; hydroxylation/Ti ZSM 5;
【Key words】 isomorphic substitutions; zeolites; hydroxylation/Ti ZSM 5;
【基金】 中国石油化工总公司资助,国家自然科学基金,辽宁省博士起动基金,大连市青年基金
- 【文献出处】 大连理工大学学报 ,JOURNAL OF DALIAN UNIVERSITY OF TECHNOLOGY , 编辑部邮箱 ,1998年03期
- 【分类号】TQ424.2
- 【被引频次】39
- 【下载频次】163