TiO_2 is an n-type semiconductor and has been widely studied as gas sensor material for detecting CO, ethonal, H_2. Rutile TiO_2 has been an important material for oxygen sensor after ZrO_2 oxygen gas sensor.

• TiO_2 是一种n 型半导体,正在被广泛用于CO、醇类、H_2 等气体的气敏传感器的研究,而金红石结构的TiO_2材料是继ZrO_2氧敏材料后研究最多的氧敏材料之一。