Synthesis of Visible-Light heterostructured photocatalyst of Ag/AgCl deposited on (040) facet of monoclinic BiVO4 for efficient carbamazepine photocatalytic removal


Yentur G., DÜKKANCI M.

APPLIED SURFACE SCIENCE, cilt.531, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

Visible light photocatalysis of Ag/AgCl/BiVO4 was synthesized by the selective doping of Ag/AgCl on (040) facet of monoclinic BiVO4. The as-prepared catalyst was characterized by XRD, SEM, EDS, UV-Vis DRS, XPS, and nitrogen adsorption studies. The photocatalytic activity of Ag/AgCl/BiVO4 was tested on the removal of a pharmaceutical drug carbamazepine (CBZ). A CBZ removal of 70.6% and COD and TOC decrements of 21% and 9.6% were achieved within a reaction time of 4 h. The results demonstrated that the addition of oxidants improved the photocatalytic activity (97.9% and 100% CBZ removal in the presence of H2O2 and PS). Photocatalytic mechanism of the Ag/AgCl/BiVO4 plasmonic composite photocatalyst under visible LED light irradiation was clarified and O-2(center dot-) radicals were found as the most dominant radicals. The toxicity decrement was 21.7% for the treated CBZ solution. Furthermore, the Ag/AgCl/BiVO4 heterostructured photocatalyst has high stability under visible light irradiation which could be reused after three consecutive runs with a small Ag leaching (< 0.1 ppm).