Ai-Hsuan Lee, Yi-Chuen Wang, Chiing-Chang Chen
2019
Citations
1
Influential Citations
95
Citations
Quality indicators
Journal
Journal of colloid and interface science
Abstract
Semiconductor photocatalysts that are robust and galvanized by visible light have been increasingly sought after, with lead bismuth oxyhalide (PbBiO2X)-which constitutes a perovskite-like semiconductor-receiving vast attention recently. We noted, after a relevant literature survey, that tetragonal lead bismuth oxyiodide/bismuth oxyiodide/graphitic carbon nitride (t-PbBiO2I/Bi5O7I/g-C3N4)-supported crystal violet (CV) dye photocatalytic degradation under irradiation with visible light has yet to be reported. The current study provides the report of t-PbBiO2I/Bi5O7I/g-C3N4 composite isolation and characterization realized through field-emission scanning electron microscopy-energy-dispersive spectroscopy, X-ray diffraction, high-resolution X-ray photoelectron spectroscopy, transmission electron microscopy, photoluminescence spectroscopy, Brunauer-Emmett-Teller analysis, Fourier-transform infrared spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. Catalytic performance observation revealed that using t-PbBiO2I/Bi5O7I/g-C3N4 resulted in an optimal reaction rate constant of 0.3518 h-1, a derivation exceeding the derivations for the photocatalysts t-PbBiO2I, Bi5O7I, g-C3N4, and t-PbBiO2I/Bi5O7I by 15, 6.6, 13.1, and 1.4 times, respectively. As demonstrated by the quenching effects associated with diverse scavengers, the electron paramagnetic resonance results revealed reactive O2- to have a major role in the CV dye degradation. The paper proposes and also describes possible photodegradation mechanisms. The method that was realized in this study is valuable for PbBiO2I/Bi5O7I/g-C3N4 synthesis and CV dye photocatalytic degradation for future applications in environmental pollution regulation.