Abstract
A series of AgIO3 modified BiOI/CoFe2O4 heterojunction photocatalysts synthesized by a solvothermal and subsequent deposition–precipitation method were utilized to remove gaseous Hg0 from simulated flue gas under fluorescent light irradiation. The effects of AgIO3 content, photocatalyst dosage, solution temperature, fluorescent lamp irradiation, pH value, inorganic anions, and SO2 and NO on Hg0 removal performances were investigated in detail. Moreover, the ternary AgIO3–BiOI/CoFe2O4 composites were characterized by XRD, magnetic hysteresis, N2 adsorption–desorption, SEM, TEM, XPS, DRS, ESR, and photocurrent analyses. The results indicated that the AgIO3–BiOI/CoFe2O4 materials possessed enhanced visible-light-driven photocatalytic activities for Hg0 removal, which were much higher than those for AgIO3 and BiOI, and the Hg0 removal efficiency by optimum AgIO3(7%)/BC can reach as high as 99%. The AgIO3 content, solution temperature, FSL irradiation, and SO2 all exhibited significant effects on Hg0 removal. ...
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