期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 444, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2023.114925
关键词
Bismuth complex; Ag2O nanoparticle; Photocatalysis; Sulfonamide antibiotics
In this article, a two-dimensional bismuth complex (Bi-nic) was successfully synthesized using nicotinic acid as ligand. Ag2O/Bi-nic nanocomposites with high visible-light driven photocatalytic activity were prepared using Bi-nic as precursor. The Ag2O/Bi-nic nanocomposites exhibited excellent photocatalytic activities in degradation of sulfonamide antibiotics under visible light.
In this article, a two-dimensional bismuth complex (Bi-nic) was successfully synthesized via hydrothermal method using nicotinic acid (nic) as ligand. Then, Ag2O/Bi-nic nanocomposites with high visible-light driven photocatalytic activity were prepared at 60 degrees C, 80 degrees C and 100 degrees C, respectively, using Bi-nic as precursor. The synthesized Ag2O/Bi-nic nanocomposites were structurally characterized by XRD, FT-IR, EDX, XPS and DRS. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images displayed that Ag2O nanoparticles with an average size of 20 nm distributed on the surface of Bi-nic nano-sheets. The Ag2O/Bi-nic composites exhibited excellent photocatalytic activities in degradation of sulfonamide antibiotics under visible light. Under the catalysis of Ag2O/Bi-nic-80, the degradation efficiencies of sulfadiazine and sulfamethoxazole antibiotics were up to 94% and 93% after irradiating for 160 and 60 min, respectively. Ag2O and Bi-nic form a Z-scheme heterojunction structure in the Ag2O/Bi-nic nanocomposite, which allows electrons to transfer from the conduction band of Bi-nic to the valence band of Ag2O. It is revealed that the photogenerated e and h+ can be effectively separated on the interfacial between Ag2O nanoparticle and Bi-nic nanosheet, which significantly improved the photocatalytic activity of Ag2O/Bi-nic.
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