Mo^(6+)掺杂TiO_2纳米材料的表面性能及氧敏特性

Surface characteristics and oxygen sensitivity of TiO_2 doped by Mo^(6+)

以TiC l3为钛源,采用溶胶-凝胶法制备Mo6+掺杂TiO2基纳米粉体,表明在400℃下低温烧结,即可得到金红石相为主晶相的TiO2基敏感材料。在低温工作条件(145℃)及1×10-4O2下,Mo6+掺杂TiO2厚膜型气敏元件的氧敏特性比纯TiO2的好,并结合Zeta电位特性测量,其氧敏特性的增强在于表面电荷密度的提高。

TiO2 based nanosized powders doped with Mo^6＋ were prepared by sol - gel technique using TiCl3. It indicates that rutile TiO2 can be obtained at low annealing temperature （400℃）. Oxygen sensi- tivity of thick - film sensors were also researched at low operating temperature （ 145℃ ） and 1 × 10^-4oxygen concentration. The sensitivity of TiO2 doped with Mo^6＋ is better than that of pure TiO2 due to the charge density on surface, which is detected by Zeta potential.