由天然钠基膨润土直接合成钛柱撑膨润土的研究  

Experimental Study for Synthesizing Titanium Pillared Clay Directly from Natural Na-bentonites

作　　者：杨婷[1] 郑举功[1] 孙力[1] 龚文武[1] 柯祖德[1] 

机构地区：[1]东华理工大学材料科学与工程系,江西抚州344000

出　　处：《环境科学与技术》2012年第9期21-24,44,共5页Environmental Science & Technology

基　　金：江西省省教育厅科技项目(GJJ11152);东华理工大学校长基金(DHXK1018)

摘　　要：以高庙子天然钠基膨润土为原料,钛酸正丁酯在pH=2-5环境下水解聚合成柱撑剂,水热法制备了钛柱撑膨润土（Ti-pillaredclay,Ti-PILC）。采用X-射线粉晶衍射（XRD）、扫描电镜（SEM）、比表面积分析仪（BET）分析了产物的结构和形貌。探讨了制备Ti-PILC的工艺参数对结构的影响。结果表明：Ti-PILC呈片层桥结的多孔结构;钛柱撑剂撑开的d001层间距为1.860 8~2.481 3 nm;比表面积由31 m2/g增加到191 m2/g。柱撑最佳工艺参数为：钛/土比30 mmol/g,反应时间为3 h,反应温度为100℃。An experimental preparation of titanium pillar clay （Ti-PILC） directly from natural Gaomiaozi Na-bentonite was conducted, involving the hydrolytic-polymeric reaction of Ti（OC4H9）4 under the condition of pH values ranging from 2 to 5. Additionally, structure and morphology of the synthesized Ti-PILC sample was described by instruments such as X-ray powder diffraction （XRD）, SEM and Brunauer-Emmett-Teller （BET）, which indicated Ti-PILC had a porous texture with lapped flakes and a specific surface area of 191 m2/g. The preparation technical parameters and their effects on the structure of Ti-PILC were investigated, which resulted in the optimum condition for Ti-PILC synthesis, i.e., the ratio of Ti/bentonite 30 mmol/g and hydrothermal reaction at the temperature of 100℃ for three hours.

关 键 词：高庙子 钠基膨润土 水热法 钛柱撑膨润土 

分 类 号：TQ623.6[化学工程—精细化工]