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TiO2, TiO2 (C) and TiO2 (N) substrates were coated with silver depositions by thermal reduction method using solutions containing 1 M, 0.1 M and 0.0125 M of AgNO3, respectively. Surviving E. coli (CFU) on respective substrates after photocatalysis (1.2×103 lux, 10 min) was shown. ** P<0.01 as compared with respective Ag/TiO2 and Ag/TiO2 (C) groups.
