Preparation and Function of Layered Metallosilicate Materials

层状金属硅酸盐材料的制备及功能

• 批准号: 12650826
• 负责人: TAKEI Takashi
• 金额: $ 2.3万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650826/
• 关键词: silica; layered material; catalyst; aluminosilicat; titanosilicate; カネマイト

Layered aluminosilicate and titanosilicate prepared from layered silicate kanemite have been investigated. First preparation method and basic properties of pure kanemite were established. The conditions of pillaring of kanemite by addition of tetraethylorthosilicate were studied. Consequently silica-pillared materials which have high specific surface areas and micro pores could be obtained by addition of tetraethylorthosilicate. Furthermore the layered structure as kanemite was held by the silica pillars. Al or Ti contained kanemite were prepared by addition of aluminum nitride or titanium butoxide to powdered sodium silicate or water glass. Structure ofkanemite was not destroyed by addition of Al (Si/Al>10) and Ti (Si/Ti>20). ^<27>A1-, ^<29>Si-MAS/NMR and UV-vis spectra revealed that the state of Al and Ti atoms in silica matrix shows 4-coordination numbers. XRD diffraction patterns demonstrated that the silicapillared materials maintained layered structure. The specific surface areas and pore sizes of the silica-pillared materials estimated from nitrogen adsorption were 600-1 000m^2/g and 1.4-1.5nm for aluminosilicate, 340-610m^2/g and 0.7-1.Onm for titanosilicate, respectively. These materials are microporous materials. The catalytic properties of the silica-pillared materials were investigated by IR spectra of adsorbed pyridine on the silica-pillared aluminosilicates and catalytic reaction of bromination of phenol red with H_2O_2. The silica-pillared aluminosilicates have Bronsted and Lewis acid sites. The silica-pillared titanosilicates show catalytic activity for bromination of phenol red with H_2O_2.

研究了由层状硅酸盐钾镁矾制备层状铝硅酸盐和钛硅酸盐。首次建立了纯钾镁矾的制备方法和基本性质。研究了添加正硅酸乙酯对钾镁石柱撑的条件。因此，通过添加正硅酸乙酯可以得到具有高比表面积和微孔的硅柱撑材料。此外，层状结构作为kanemite是由二氧化硅柱。通过向粉末状硅酸钠或水玻璃中加入氮化铝或丁氧钛，制备了含Al或Ti的钾镁石。Al（Si/Al>10）和Ti（Si/Ti>20）的加入并没有破坏钾镁矾的结构。~ 3Al<27>-、~ 3Si-MAS<29>/NMR和UV-vis光谱表明，Al和Ti原子在SiO_2基体中的状态为4配位数。XRD衍射表明，硅柱化材料保持了层状结构。由氮吸附法测得硅柱撑材料的比表面积为600- 1000m^2/g，比孔径为1.4-1.5nm;硅柱撑材料的比表面积为340-610m^2/g，比孔径为0.7- 1.0nm。这些材料是微孔材料。通过吡啶在硅柱撑铝硅酸盐上的吸附红外光谱和催化过氧化氢溴化苯酚红的反应研究了硅柱撑材料的催化性能。二氧化硅柱撑的铝硅酸盐具有布朗斯台德和刘易斯酸位点。硅柱钛硅酸盐对H_2O_2溴代苯酚红反应具有催化活性。