Abstract
A facile three-step photo-deposition method was applied to successfully synthesize Ag and AgI modified ZnO composites (AgI/Ag/ZnO). Under visible-light irradiation, the composites enhanced the photocatalytic efficiency of Naproxen (NPX) degradation as the Ag contents increased. 100 % NPX could be removed in 60 min when AgI/Ag/ZnO (75 %) was the catalyst. Different initial pH, alongside the addition of NO3− and SO42− had little impact, but Cl− could accelerate the degradation rate. O2− and h+ played a significant role in the photocatalysis process. Several byproducts were predicted by DFT-software calculation and verified by LC–MS/MS. The cycling experiments showed that the removal rate decreased after the first run due to the leaching of Ag+. The removal rate kept stable after the next two reactions.
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