摘要
介绍了溶胶凝胶法(Sol Gel)制备纳米TiO2的工艺流程。采用X射线衍射(XRD)、热重差示扫描量热(TG DSC)等方法表征了Mo掺杂TiO2的相组成、相变点与掺杂量的关系。结果表明,掺杂Mo的TiO2在520℃、650℃煅烧2h后呈锐钛矿结构,在700℃煅烧2h已有10.3%锐钛矿结构转化为金红石结构。TG DSC测试表明,随着Mo掺杂浓度的增大,TiO2由非晶态向锐钛矿结构的转变温度升高。光催化降解反应表明,Mo掺杂TiO2光催化反应2h后氨气降解率达32.3%,且浓度不出现波动。
The process of preparing Mo-doped titanium dioxide by Sol-Gel method was introduced. Component phases and influence of doping content on transformation temperature were characterized by XRD and TG-DSC respectively. The results show that particles are in form of anatase calcined for 2 h at 520°C, 650°C, while 10.3% particles are in form of rutile calcined for 2 h at 700°C. TG-DSC method shows that transformation temperature of titanium dioxide from amorphous state to the anatase structure increases with the increase of Mo concentration. The ratio of ammonia degradation for 2 h by Mo-doped titanium dioxide is up to 32.3% and has no fluctuation according to time.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2005年第5期37-40,共4页
Heat Treatment of Metals
