A novel oxygen sensor based in tris（2,2′-bipyridine） ruthenium（Ⅱ）,[Ru（bpy）3]Cl2 adsorbed onto silica particles codoped with metal-ions as support system was reported first in this paper.The oxygen-sensing properties were studied.Compared with reference(IN2/IO2-IRef),the relative fluorescence intensity was enhanced after codoped with La3+(10-3M) and decreased after codoped with Ag+(5.0×10-4M).The experiments of codoping with different concentration of Ag+ and La3+ showed that the relative fluorescence intensity was all decreased after different concentration of Ag+ were codoped with,but the result was contrary for La3+.We suggest that the former has formed dark-brown Ag2O which can adsorb a part of excited light,given rise to the decrease of fluorescence intensity.The increase of the latter probably because the energy transfer of La increased the fluorescence intensity.
