系列层状K_2La_2Ti_3O_(10)的制备及光催化性能  

Synthesis and Photocatalytic Property of Layered Lanthanum Titanate

作　　者：张莉莉[1] 张维光[1] 杨娟[2] 陆路德[1] 杨绪杰[1] 汪信[1] 

机构地区：[1]南京理工大学材料化学实验室 [2]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《稀土》2005年第5期9-12,共4页Chinese Rare Earths

基　　金：江苏省自然科学基金资助课题(BK2002100)

摘　　要：通过固相反应法合成了一系列不同尺寸的K2L a2T i3O10,考察了原料T iO2粒径对固相反应速率及产物尺寸、形貌的影响,得到了不同粒径下原料的最佳配比;以降解甲基橙为探针考察其光催化性能。结果表明:减小原料粒径,反应温度降低、速率加快;有利于合成小尺寸、大比表面积(可达11.83 m2.-g 1)的层状K2L a2T i3O10,而且光催化性能提高。Layered lanthanum titanate powders with different size were fabricated by solid state reaction of K2CO3,La （NO3）3 and TiO2. The influence of the particle size of starting material TiO2 on the velocity of solid state reaction and the morphology of the resulting products were studied. The photocatalytic properties of the samples were evaluated by methyl orange decomposition under UV irradiation. It was found that small sized TiO2 enhances reaction speed and leads to the formation of smaller sized lanthanum titanate with larger surface area,and the photoactivity of K2La2Ti3O10（Ⅰ） is the highest.

关 键 词：层状镧钛酸盐 原料粒径 表面 光催化 

分 类 号：O614.113[理学—无机化学] O614.33[理学—化学]