物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2001年
1期
10-14
,共5页
混合表面活性剂%模板%六方介孔相%含钛氧化硅%合成
混閤錶麵活性劑%模闆%六方介孔相%含鈦氧化硅%閤成
혼합표면활성제%모판%륙방개공상%함태양화규%합성
采用混合十六烷基三甲基溴化铵（CTAB）与不同碳链的脂肪胺（CnNH2n＋3，n=8,10,12,14,16）作模板，在四甲基氢氧化胺为碱源的条件下，合成了具有六方介孔结构的含钛氧化硅Ti-MCM-41分子筛材料.XRD和TEM测试表明所合成材料具有高度的长程有序结构，样品的N2吸附/脱附等温线表明,高度有序的Ti-MCM-41材料展示了毛细凝聚的陡峭台阶和狭窄的介孔孔径分布.对反应物配比中Ti/Si比、脂肪胺碳链长度n对六方介孔相结构的影响进行了研究，实验发现当Ti/Si<0.15和n<16时，均可获得具有六方介孔结构的含钛氧化硅Ti-MCM-41；而当Ti/Si≥0.15或n>16时，产物将分别发生从六方向无定形态或从六方向层状介孔相结构的转移，从混合表面活性剂的堆积参数对这种相转移现象进行了分析.
採用混閤十六烷基三甲基溴化銨（CTAB）與不同碳鏈的脂肪胺（CnNH2n＋3，n=8,10,12,14,16）作模闆，在四甲基氫氧化胺為堿源的條件下，閤成瞭具有六方介孔結構的含鈦氧化硅Ti-MCM-41分子篩材料.XRD和TEM測試錶明所閤成材料具有高度的長程有序結構，樣品的N2吸附/脫附等溫線錶明,高度有序的Ti-MCM-41材料展示瞭毛細凝聚的陡峭檯階和狹窄的介孔孔徑分佈.對反應物配比中Ti/Si比、脂肪胺碳鏈長度n對六方介孔相結構的影響進行瞭研究，實驗髮現噹Ti/Si<0.15和n<16時，均可穫得具有六方介孔結構的含鈦氧化硅Ti-MCM-41；而噹Ti/Si≥0.15或n>16時，產物將分彆髮生從六方嚮無定形態或從六方嚮層狀介孔相結構的轉移，從混閤錶麵活性劑的堆積參數對這種相轉移現象進行瞭分析.
채용혼합십륙완기삼갑기추화안（CTAB）여불동탄련적지방알（CnNH2n＋3，n=8,10,12,14,16）작모판，재사갑기경양화알위감원적조건하，합성료구유륙방개공결구적함태양화규Ti-MCM-41분자사재료.XRD화TEM측시표명소합성재료구유고도적장정유서결구，양품적N2흡부/탈부등온선표명,고도유서적Ti-MCM-41재료전시료모세응취적두초태계화협착적개공공경분포.대반응물배비중Ti/Si비、지방알탄련장도n대륙방개공상결구적영향진행료연구，실험발현당Ti/Si<0.15화n<16시，균가획득구유륙방개공결구적함태양화규Ti-MCM-41；이당Ti/Si≥0.15혹n>16시，산물장분별발생종륙방향무정형태혹종륙방향층상개공상결구적전이，종혼합표면활성제적퇴적삼수대저충상전이현상진행료분석.
Using the mixture of cetyltrimethylammonium bromide(CTAB) andneutral alkylamine surfactant (CnNH2n＋3, n=8,10,12,14,16) as templated, hexagonal mesostructured titanium-containing silica Ti- MCM-41 was synthesized. XRD and TEM provided direct evidence for a well-ordered hexagonal nano pore structure. N2 adsorption/desorption isotherm showed that highly ordered Ti-MCM-41 materials exhibited sharp steps of capillary condensation and narrow pore size distributions. The effect of the ratio of titanium to silica(Ti/Si) and the chain length n of the alkylamine on the mesostructure were investigated. It was revealed that phase transition from hexagonal to amorphous structure occured with Ti/Si >0.15 and from hexagonal to lamellar structure appppeared with n=18.
