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Correlation between Si-O− groups and H2O2 generation. (A) Dependence of the H2O2 concentration on the density of Si-O− groups. (B) Comparation of Si-OH(a) density before and after H2O2 generation. (C) Temperature dependence of H2O2 generation. The pink line is fluorescence intensity per pixel of 5 mL aqueous PTO solution without added H2O2. The yellow line is fluorescence intensity per pixel of 5 mL aqueous PTO solution with added 0.1 g SiO2 powder and 0.5 mg H2O2.
