Perovskite-like photocatalyst, PbBiO2Br/PbO/g-C3N4: Synthesis, characterization, and visible-light-driven photocatalytic activity

Lead bismuth oxybromide (PbBiO2Br) is a powerful perovskite-like semiconductor that can be used with visible light. PbBiO2Br is a perovskite-like photocatalyst that has recently received scholarly attention. Until now, scholars have not published studies regarding PbBiO2Br/PbO/g-C3N4-mediated crystal violet (CV) dye and 2-Hydroxybenzoic Acid (HBA) photodegradation under irradiation with visible light. The current paper reports the first composite isolation of PbBiO2Br/PbO/g-C3N4; characterization was realized through XRD, TEM, FE-SEM-EDS, HR-XPS, FI-IR, PL, BET, and UV-DRS. Photocatalytic efficiency observation proved that using PbBiO2Br/PbO/g-C3N4 produced the highest observed reaction rate, namely 0.1981 h(-1). This derivation exceeded the derivations for the PbBiO2Br, PbO, g-C3N4 photocatalysts, and PbBiO2Br/PbO by 1.23, 34.2, 4.3, and 1.2 times, respectively. Four scavengers demonstrated quenching effects. The O-2(center dot-) radical was critical to HBA degradation, whereas the (OH)-O-center dot radical and 102 species played minor roles in the observed CV dye degradation. The present paper proposes and explains possible photocatalytic degradation mechanisms. This study's methods of PbBiO2Br/PbO/g-C3N4 synthesis and photocatalytic degradation of CV can be useful for future treatment of wastewater. (C) 2018 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.