Enhanced visible-light photocatalytic activity of Ag/AgI coupled Bi2O2CO3 microspheres

摘要

Ag/AgI nanoparticles decorated flower-like Bi2O2CO3 were prepared via a solvothermal precipitation-de position-photoreduction method. The Ag/AgI/Bi2O2CO3 heterojunction with the Ag/Bi2O2CO3 molar ratio of 0.3/1 (0.3AAB) achieved the highest activity under visible light, and the degradation rate constant was 28 or 1 times higher than that by using pristine Bi2O2CO3 or Ag/AgI. The remarkable boosting of photo catalytic activity is due to the synergistic effect of surface plasmon resonance (SPR) from Ag and the heterojunction between Ag/Agl and Bi2O2CO3. The photogenerated holes and superoxide radical primarily govern the RhB degradation. AgtAgI/Bi2O2CO3 holds great potential for environmental remediation. (C) 2016 Elsevier B.V. All rights reserved.