摘要
以钛酸正丁酯(TBOT)为钛源、发烟硅胶为硅源、四甲基氢氧化铵(TMAOH)为模板剂,采用一步法直接水热合成了CDO(Cylindrically Double Saw-Edged Zeolite One)晶体结构的含钛分子筛Ti-CDS-1.用粉末X射线衍射、电子扫描、紫外可见漫反射光谱、傅立叶变换红外光谱等手段对所合成的样品进行了表征.结果表明,Ti-CDS-1维持原来全硅分子筛的片状晶体外形;原料中钛原子大部分嵌入到CDS-1分子筛骨架,少量钛在分子筛表面形成八面体非骨架钛物种,这部分骨架外钛可以用酸处理选择性去除.
A novel titanosilicate with the CDO （Cylindrically Double Saw-Edged Zeolite One） structure, Ti-CDS-1, has been hydrothermally synthesized by using tetrabutylorthotitanate （TBOT） as a Ti source, fumed silica as a Si source, and tetramethylammonium hydroxide （TMAOH） as a template. The samples were characterized by various techniques such as XRD, SEM, UV-visible and FT-IR spectroscopies. Ti-CDS-1 showed a morphology of thin plate crystals comparable to siliceous CDS-1. Ti-CDS-1 contained Ti species mainly in the framework in addition to a small part of octahedral extraframework Ti on exterior crystal surfaces. The extraframework Ti species could be removed selectively by an acid treatment.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第1期141-144,共4页
Acta Chimica Sinica
基金
国家"973"科技计划(No.2006CB202508)
国家自然科学基金(Nos.20473027
20673038)
上海市科委(Nos.05DZ22306
06SR07101)资助项目
