胶溶-水热法制备超细PAA/TiO_2纳米粉体的研究  

Preparation of superfine PAA/TiO_2 nano powders by peptization-hydrothermal method

作　　者：辛柏福[1] 高跃[1] 王虹[1] 吴杰[1] 李洪峰[1] 张海秋[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2011年第4期542-545,554,共5页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(20431030);黑龙江省教育厅科学技术研究项目(12511381)

摘　　要：以四氯化钛为原料、聚丙烯酸(PAA)为修饰剂,采用胶溶-水热处理工艺制备了超细PAA/TiO2纳米粉体。利用XRD、BET、XPS等分析技术对PAA/TiO2进行了结构表征。实验结果表明:由于PAA能有效抑制在水热过程中TiO2粒子的生长和团聚,从而制得同时具有小粒径、大比表面积、高晶化度的锐钛矿相PAA/TiO2纳米粒子,且PAA/TiO2纳米晶表层的氧空位数量、吸附氧数量及表面羟基量均显著增加,这些因素都有利光催化反应并能显著改善催化剂的光催化性能。The superfine PAA/TiO2 nano powders have been synthesized by peptization - hydrothermal process using titanium tetrachloride as material and polyacrylic acid （PAA） as modifying agents. The samples were characterized by XRD, BET, and XPS. The results suggested that PAA can effectively control the growth and agglomeration of PAA/TiO2 particles. So, the PAA/TiO2 with small size, high specific surface area, and high erystallinity can been obtained. On the other hand, the amount of adsorbed O2, surface hydroxyl and oxygen vacancies on the surface of the PAA/TiO2 is increased remarkably. These factors can markedly improve the photocatalytic activity of TiO2.

关 键 词：胶溶-水热 TIO2 PAA 纳米粉体 

分 类 号：O643[理学—物理化学]