Composite photocatalyst, tetragonal lead bismuth oxyiodide/bismuth oxyiodide/graphitic carbon nitride: Synthesis, characterization, and photocatalytic activity.

Author(s) Lee, A.H.; Wang, Y.C.; Chen, C.C.
Journal J Colloid Interface Sci
Date Published 2019 Jan 01

Semiconductor photocatalysts that are robust and galvanized by visible light have been increasingly sought after, with lead bismuth oxyhalide (PbBiOX)-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-PbBiOI/BiOI/g-CN)-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-PbBiOI/BiOI/g-CN 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-PbBiOI/BiOI/g-CN resulted in an optimal reaction rate constant of 0.3518 h, a derivation exceeding the derivations for the photocatalysts t-PbBiOI, BiOI, g-CN, and t-PbBiOI/BiOI 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 O 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 PbBiOI/BiOI/g-CN synthesis and CV dye photocatalytic degradation for future applications in environmental pollution regulation.

DOI 10.1016/j.jcis.2018.08.008
ISSN 1095-7103
Citation J Colloid Interface Sci. 2019;533:319332.

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