摘要
采用四丙基溴化铵（ＴＰＡＢｒ）为模板剂，分别以正丁胺（ＮＢＡ）、己二胺（ＨＤＡ）、二乙胺（ＤＥＡ）、乙二胺（ＥＤＡ）、三丙胺（ＴＰＡ）和四乙基氢氧化铵（ＴＥＡＯＨ）调节凝胶碱度，成功地合成出ＴＳ－１沸石．采用ＩＲ，ＸＲＤ，ＵＶ－Ｖｉｓ和ＮＭＲ等表征技术，详细考察了有机胺的作用及对钛进入沸石骨架的影响．结果表明，以ＴＥＡＯＨ为碱源时抑制钛进入骨架；以ＥＤＡ为碱源时合成的钛硅沸石结晶度低；以ＴＥＡＯＨ或ＮＢＡ为碱源时合成的钛硅沸石晶粒较均匀．有机胺在ＴＳ－１合成过程中只起到调节碱度的作用，未与ＴＰＡＢｒ联合起模板作用．
TS1 zeolite has been synthesized with tetrapropylammonium bromide (TPABr) as templating agent, using nbutylamine (NBA), diethylamine (DEA), ethylenediamine (EDA), hexanediamine (HDA), tripropyl amine (TPA) and tetraethylammonium hydroxide (TEAOH) to regulate the basicity of the gel, respectively. Using IR, XRD, UVVis, 13C CP MAS NMR and 29Si CP MAS NMR techniques, the effect of the organic amines on the incorporation of titanium from entering into the framework and their templating effect were studied in detail. The results showed that using TEAOH as base source prevented titanium into the framework; using EDA as base source, the crystallinity of TS1 was very low; however, using TEAOH or NBA as base source, TS1 crystal was in the form of small uniform prisms. Organic amines could not act as templating agent with TPABr, only regulating the basicity of the gel during TS1 synthesis.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1998年第3期242-246,共5页
基金
国家自然科学基金
关键词
钛硅沸石
四丙基溴化胺
TS-1沸石
合成
有机胺
Titanium silicalite, Tetrapropylammonium bromide, Organic amine, CP MAS NMR, Templating effect
