n order to improve the sensitivity of the oxygen sensor based on tris(2,2′-bipyridine) ruthenium (Ⅱ) and ［Ru(bpy)］Cl2 adsorbed onto silica particles, the La-codoped silica gel was used as the support system. Compared with reference (I0/I=4.6),The new oxygen sensor shows a high sensitivity to oxygen with a ratio of I0/I=14.4.The response accords with Stern-Volmer equation and the codoped sample has good repeatability and photostability, with response time approximately 10 s. This is a new approach to immobilize oxygen sensitive material for oxygen sensor.
