摘要
通过在两个合成分子筛的体系ＳｉＯ２－ＮａＯＨ－ＥＧ－Ｒ和ＳｉＯ２－ＴＰＡＢｒ－ＮａＯＨ－Ｈ２Ｏ－Ｒ（Ｒ： 邻苯二酚， ＥＧ： 乙二醇）中加入邻苯二酚获得了具有较大尺寸和完美形貌的分子筛单晶． ２９ＳｉＮＭＲ，ＩＲ和ＵＶ－Ｖｉｓ光谱表明， 在反应混和物中有硅－邻苯二酚螯合物生成， 这种硅的螯合物在形成分子筛大单晶过程中起到了缓释硅源的作用．
To obtain large perfect crystals of zeolites, pyrocatechol as an additive was added into the two system: SiO 2 NaOH EG R and SiO 2 TPABr NaOH R H 2O (R: pyrocatechol, EG: ethylene glycol). Experimental results showed that the crystals synthesized in the presence of pyrocatechol have much larger size and better morphology than those synthesized in the absence of pyrocatechol. The role of pyrocatechol in the hydrothermal reaction mixture has been characterized by 29 Si NMR, IR, and UV Vis spectroscopy, and it was shown that silicon pyrocatechol complex was formed in the reaction system.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第11期1667-1670,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
全硅
分子筛大单晶
邻苯二酚
螯合物
Si-ZSM-5
Silica sodalite
Silicalite 1
Large single crystals
Pyrocatechol
Silicon pyrocatechol complex
