不同晶型纳米TiO_2的水热合成及光催化性能  

Preparation of different polymorphs nano-TiO_2 by hydrothermal synthesis and their photocatalytic acticity

作　　者：古映莹[1] 邱小勇[1] 杜作娟[2] 

机构地区：[1]中南大学化学化工学院,长沙410083 [2]中南大学冶金科学与工程学院,长沙410083

出　　处：《化工新型材料》2004年第3期14-16,39,共4页New Chemical Materials

基　　金：国家 8 63高技术发展计划支柱项目 (2 0 0 1AA2 1 80 0 4 1 )

摘　　要：采用水热法制备了TiO2 纳米粉 ,并通过XRD、TEM、激光粒度分析对产物进行表征。结果发现 ,采用不同的钛源 ,不同的加料方式 ,可得到不同晶型的TiO2 纳米粒子。通过系列样品对甲基橙溶液的光催化性能的研究 ,发现混晶相纳米TiO2 的光催化性能最好 ,其次是锐钛矿相 ,金红石相的光催化性能最差。Nanocrystalline TiO 2 particles were prepared by hydrothermal synthesis method. The characteristics of the powders were studied by XRD, TEM and the laser-apparatus used to analyze the granularity of powder. The results show that natase TiO 2 of fine diameter and orbicular crystal was synthesized by Ti(SO 4) 2 and Na 2CO 3. Rutile and mixed crystal TiO 2 of fine diameter and orbicular crystal were synthesized by TiCl 4.Then the photocatalyze of samples on methly orange were researched and the performance of different samples on methly orange was compared. The result is: mixed crystal is the best, and anatase is better than rutile.

关 键 词：纳米TiO2 水热合成技术 光催化性能 激光粒度 表征 加料方式 甲基橙溶液 无机功能材料 

分 类 号：O643.3[理学—物理化学]