摘要
以TiCl4为原料,采用微波水热合成法制备了锐钛型纳米TiO2光催化剂。利用XRD、TEM、TG-DTA等技术对产物进行了表征,并以制备的TiO2为催化剂,通过酸性品红水溶液的光催化降解实验考察了该催化剂的光催化反应性能。结果表明:微波场作用使反应体系均匀迅速的升温,加快了水热晶化反应速度,在20×105Pa的微波水热条件下Ti(OH)4水热晶化2.5h后,产物主要以锐钛型存在,晶粒粒径小于10nm。与常规水热合成时间相比,微波水热条件下在较短的晶化时间内形成了锐钛型TiO2,光催化降解品红的实验也证明微波水热条件下制备的催化剂具有较高的光催化性能。
Using titanium tetrachloride as the raw material, the nano-crystal titanium dioxide was synthesized by microwave-hydrothermal method. All products were characterized by X-ray diffraction （XRD）, TG-DTA and transmission electron microscopy （TEM）. Their catalytic capability was investigated by the degradation of acid-fuchsin. The results suggest that the microwave field makes the hydrothermal reaction system reaches a high temperature rapidly and uniformly, and crystallization is accelerated. When Ti（OH）4 is treated for 2.5h at 20- 105 Pa in a microwave-hydrothermal vessel, the main crystalline phase of titanium dioxide is anatase and the particle size is under 10 nm. Due to the generation of high temperatures rapidly in the presence of microwave, the crystallization under microwave-hydrothermal conditions is faster than that in the conventional hydrothermal method. The photocatalytic activity of these samples is high, which is proved by the degradation experiments of acid-fuchsin.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2006年第1期138-141,共4页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金资助项目(20377034)
西安交通大学行动计划环境工程重点学科建设项目
关键词
微波水热法
二氧化钛
水热合成
光催化
microwave-hydrothermal method
titanium dioxide
hydrothermal synthesis
photocatalysis
