由钙钠基膨润土合成Ti-PILCs 的研究

以湖南某地钙钠基膨润土为原料, 经提纯钠化处理后, 直接以TiCl₄ 为钛源, 采取水解法制备了钛交联蒙脱石纳米复合材料(Ti-PILCs);并对蒙脱石悬浮液浓度、Ti 土比、交联反应温度和交联剂老化时间等合成条件进行了讨论;XRD 检测表明:采用水解法可以将层间距为1.57 nm 的钙钠基蒙脱石制备成为大孔结构的钛交联蒙脱石纳米复合材料, 当蒙脱石悬浮液质量浓度为0.5%, 交联温度为20 ℃, 交联剂老化时间为4 h, Ti/土=15 mmol/g, pH =1.10 时, 可得到d₀₀₁值为2.92 nm 大孔结构的Ti-PILC, 且比表面可达266 m²/g 。

The Study of the Synthesis of Titanium Pillared Clay Using Ca-Na-Montmor Illonite

The synthetic conditions of titanium pillared clay is studied with pillaring agent prepared from TiCl4 and HCl, using Ca-Na-montmorillonite inHunan as the starting clay.Characterization of the products was performed by XRD.The influence of various synthetic conditions such as the initial concentration of clay, Ti/clay ratio, the pillaring reaction temperature and the aging time of pillaring agent have been analyzed.The result of XRD shows that titanium pillared montmorillonite with large pore structure also can be synthesized using Ca-Na-montmorillonite with d001 =1.57 nm by hydrolysis method.When the initial concentration of clay was 0.5%, pH =1.10, Ti/clay ratio was 15mmol/g, the pillaring reaction temperature was 20 ℃ and the aging time of pillaring agent was 4 hour, Ti-PILC with large pore structure (d₀₀₁ =2.92 nm)was obtained, and its surface area is 266 m²/g.